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Wu S, Yan M, Wu Y, Wu Y, Lan X, Cheng J, Zhao W. Designing a photocatalytic and self-renewed g-C 3N 4 nanosheet/poly-Schiff base composite coating towards long-term biofouling resistance. MATERIALS HORIZONS 2024. [PMID: 38953849 DOI: 10.1039/d4mh00550c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Inhibiting the adhesion and growth of marine microorganisms through photocatalysis is a potentially efficient and environmentally friendly antifouling strategy. However, the undesired "shading effect" caused by resin coatings and microbial deposition reduces the utilization of the catalysts and leads to a failure in the antifouling active substance on the coating surface. Here, we successfully developed a composite coating (DPC-x) combining g-C3N4 nanosheet (g-C-NS) photocatalysts with degradable green poly-Schiff base resins, which integrates the dual functions of enhanced dynamic self-renewal and photocatalytic antibacterial activities towards long-term anti-biofouling. The controllable and complete degradability of the poly-Schiff base polymer chains and the self-renewal mechanism of the DPC-x coating exposed the internal g-C-NS, which provided a constant stream of photocatalytic reactive interfaces for 100% utilization and release of the photocatalysts. g-C-NS were homogeneously dispersed in the degradable resin coating, significantly enhancing and adjusting the self-renewal rate of the poly-Schiff base resin coating in visible light. The degradation reaction rate of DPC-0.2 (20 wt% g-C-NS) was 40 times that of DPC, thus improving the capabilities of surface self-renewal and fouling-release. Due to the synergistic antifouling mechanism of the efficient antibacterial properties and the enhanced degradation/self-renewal, the antimicrobial rates of DPC and DPC-0.2 were 94.58% and 99.31% in the dark, and 98.2% and 99.87% in visible light. DPC-x has excellent all-weather antimicrobial efficacy and could offer a new perspective on eco-friendly marine antifouling strategies.
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Affiliation(s)
- Saijun Wu
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Minglong Yan
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
| | - Yinghao Wu
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
| | - Yangmin Wu
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
| | - Xijian Lan
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
| | - Jianjun Cheng
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
| | - Wenjie Zhao
- Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.
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Zhang G, Pan J, Dong X, Li X, Song Z, Liu Y, Liu X, Li Y, Li Q. Construction of atom co-sharing Bi/Bi 4O 5Br 2 nanosheet heterojunction for plasmonic-enhanced visible-light-driven photocatalytic antibacterial activity. Colloids Surf B Biointerfaces 2024; 238:113923. [PMID: 38692173 DOI: 10.1016/j.colsurfb.2024.113923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/04/2024] [Accepted: 04/17/2024] [Indexed: 05/03/2024]
Abstract
The rapid advancement of photodynamic therapy (PDT) antibacterial materials has led to promising alternatives to antibiotics for treating bacterial infections. However, antibacterial drugs have poor light absorption and utilization rates, which limits their practical application. Constructing two-dimensional (2D) heterojunctions from materials with matching photophysical properties has emerged as a highly effective strategy for achieving high-efficiency photo-antibacterial performance. Here, we designed and prepared an atom co-sharing Bi/Bi4O5Br2 nanosheet heterojunction by a simple in situ reduction. This heterojunction material combines outstanding biocompatibility with excellent bactericidal efficiency, which exceeded 90 % against Escherichia coli (a Gram-negative bacterium) and Staphylococcus aureus (a Gram-positive bacterium) under visible light irradiation, around nine-fold higher than that with pure Bi4O5Br2 nanosheets. The results suggest that localized surface plasmon resonance (LSPR) of shared Bi atoms on the Bi4O5Br2 nanosheets promotes light utilization and the separation and transfer of photo-generated charges, thus producing more abundant reactive oxygen species (ROS), which can partake in the PDT antibacterial effect. Our study underscores the potential utility of LSPR-enhanced Bi-based nanosheet heterojunctions for safe and efficient PDT to combat bacterial infections.
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Affiliation(s)
- Guixue Zhang
- Institute of Pharmacy, Dali University, Dali, Yunnan 671000, China
| | - Jie Pan
- Department of Stomatology, The First People's Hospital of Yunnan Province, Kunming 650032, China
| | - Xiaoyi Dong
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Xue Li
- Department of Pharmacy, The First People's Hospital of Yunnan Province, Kunming 650032, China
| | - Zhiguo Song
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Yan Liu
- Institute of Pharmacy, Dali University, Dali, Yunnan 671000, China
| | - Xiaomeng Liu
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Yongjin Li
- School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
| | - Qiyan Li
- Department of Stomatology, The First People's Hospital of Yunnan Province, Kunming 650032, China.
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V V, K J, Alsawalha M, Zhang Z, Fu ML, Yuan B. Rational design of full-spectrum visible-light-responsive bimetallic sulfide Bi 2S 3/CoS 2 composites for high-efficiency photocatalytic degradation of naproxen and bacterial inactivation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119246. [PMID: 37820430 DOI: 10.1016/j.jenvman.2023.119246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 09/16/2023] [Accepted: 10/02/2023] [Indexed: 10/13/2023]
Abstract
Photocatalytic water decontamination has emerged as a highly promising technology for efficient and rapid water treatment, harnessing sustainable solar energy as its driving force. In this study, we prepared visible-light active Bi2S3/CoS2 composites for the degradation of naproxen (NPX) and the inactivation of Escherichia coli (E. coli). The homogeneous dispersion of CoS2 was stably integrated with Bi2S3, resulting in a significant enhancement of the specific surface area, efficient utilization of visible light, and effective separation of photogenerated charge carriers. Consequently, this synergistic photocatalytic system greatly facilitated the successful degradation of NPX and the inactivation of E. coli under visible-light irradiation. Compared to the pure Bi2S3 and CoS2 catalysts, the Bi2S3/CoS2 (1:2) composites displayed significantly enhanced photodegradation activity, achieving 96.46% (k = 0.2847 min-1) degradation of NPX within 90 min and maintaining good recyclability with no significant decline after six successive cycles. Additionally, the photocatalytic inactivation of E. coli results indicated that Bi2S3/CoS2 composites exhibited excellent performance, leading to the inactivation of 7 log10 cfu mL-1 of bacterial cells after 150 min of visible-light exposure. Scanning Electron Microscopy (SEM) and K+ ions leakage tests demonstrated that the destruction of the E. coli cell membrane structure resulted in cell death. The outcomes of this work suggest that Bi2S3/CoS2 composites hold significant potential for treating water contaminated with antibiotic and microbial pollutants.
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Affiliation(s)
- Vasanthakumar V
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China
| | - Jothimani K
- Department of Biotechnology, Vinayaka Mission's Kirupananda Variyar Engineering College, Vinayaka Mission's Research Foundation, Salem, 636 308, Tamil Nadu, India
| | - Murad Alsawalha
- Department of Chemical Engineering, Industrial Chemistry Division, Jubail Industrial College, P.O. Box 10099, Jubail, 31961, Saudi Arabia
| | - Zhiyong Zhang
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China; Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, PR China
| | - Ming-Lai Fu
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China.
| | - Baoling Yuan
- Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control, College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, PR China; Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, PR China.
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Liu Y, Wang G, Ma W, Feng N, Tong J, Kang X, Hu T, Wu H, Yang Q, Xie J. Preparation of magnetically separable and low-cost MC-FePd 3NPs with enhanced catalytic activity in the reduction of p-nitrophenol. NANOTECHNOLOGY 2023; 34:465701. [PMID: 37499636 DOI: 10.1088/1361-6528/aceafd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 07/27/2023] [Indexed: 07/29/2023]
Abstract
To obtain a magnetically separable, low-cost and highly efficient reduction catalyst, microbial carbon-loaded bimetallic palladium/iron nanoparticles (MC-FePd3NPs) were synthesized in this study by using waste yeast residue doped with iron during the preparation process of microbial carbon-loaded monometallic palladium nanoparticles (MC-Pd NPs). The morphology, crystal structure, magnetic properties and catalytic performance of MC-FePd3NPs for the reduction ofp-nitrophenol (p-NP) were investigated by various characterization techniques, such as SEM-EDS, TEM, XRD, PPMS-9 and UV-vis spectroscopy. The catalytic experiments showed that the MC-FePd3NPs prepared under pyrolysis conditions at 700 °C had an apparent rate constant of 1.85 × 10-1s-1which is better than the rate constants of MC-Pd NPs and other palladium-based nanocatalytic materials reported so far. The amount of palladium used in the synthesis of MC-FePd3NPs was half that of MC-Pd NPs. The catalyst exhibited soft magnetic ordering behavior and still showed a catalytic efficiency of 97.4% after five consecutive reaction cycles. Furthermore, employing MC-FePd3NPs reduces the costs of catalyst preparation and use in production. MC-FePd3NPs with efficient catalytic properties, facile magnetic separation and recyclability, and low costs of preparation and use have considerable potential for industrial applications.
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Affiliation(s)
- Yuxing Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Guozhen Wang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Wangrui Ma
- Sino-Platinum Metals Resources (Yimen) Co., Ltd, Yuxi 651100, Yunnan, People's Republic of China
| | - Ningning Feng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Jiaxin Tong
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Xinke Kang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Tao Hu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Haiyan Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
| | - Quan Yang
- Sino-Platinum Metals Resources (Yimen) Co., Ltd, Yuxi 651100, Yunnan, People's Republic of China
| | - Jianping Xie
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China
- Key Laboratory of Biometallurgy of Ministry of Education, Changsha 410083, People's Republic of China
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Tian M, Hu C, Yu J, Chen L. Carbon quantum dots (CQDs) mediated Z-scheme g-C 3N 4-CQDs/BiVO 4 heterojunction with enhanced visible light photocatalytic degradation of Paraben. CHEMOSPHERE 2023; 323:138248. [PMID: 36868421 DOI: 10.1016/j.chemosphere.2023.138248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 02/02/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
The construction of a novel Z-scheme system which possesses superior charge separation and high redox ability is highly desirable for efficient photocatalytic degradation of organic pollutants. Herein, a carbon quantum dots (CQDs) modified g-C3N4 (GCN) and BiVO4 (BVO) composite (GCN-CQDs/BVO) was fabricated via an initial loading of CQDs on GCN, and a subsequent combination with BVO during its hydrothermal synthesis. Physical characterization (e.g. TEM, XRD, XPS) verified the intimate heterojunction structure of the composite, while CQDs improved its light absorption. The band structures of GCN and BVO were evaluated, displaying the feasibility for Z-scheme formation. In comparison with GCN, BVO, and GCN/BVO, GCN-CQDs/BVO generated the highest photocurrent and lowest charge transfer resistance, inferring the prominently improved charge separation. Under visible light irradiation, GCN-CQDs/BVO exhibited the significantly enhanced activity in degrading the typical Paraben pollutant--benzyl paraben (BzP), achieving the removal of 85.7% in 150 min. The effects of various parameters were explored, demonstrating that neutral pH was optimal, while coexisting ions (CO32-, SO42-, NO3-, K+, Ca2+, Mg2+) and humic acid impacted the degradation negatively. Meanwhile, trapping experiments and electron paramagnetic resonance (EPR) technique revealed that superoxide radicals (•O2-) and hydroxyl radical (•OH) were primarily responsible for BzP degradation by GCN-CQDs/BVO. In particular, with the assistance of CQDs, the generation of •O2- and •OH was notably augmented. Based on these results, a Z-scheme photocatalytic mechanism was proposed for GCN-CQDs/BVO, where CQDs acted as electron mediators to combine the holes from GCN and electrons from BVO, resulting in significantly improved charge separation and maximized redox ability. Moreover, the toxicity of BzP was remarkably reduced during the photocatalytic process, emphasizing its great potential in abating the risk of Paraben pollutants.
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Affiliation(s)
- Maosheng Tian
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430072, China
| | - Chenyan Hu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430072, China.
| | - Junxia Yu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430072, China
| | - Lianguo Chen
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
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6
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Xu H, Ou Y, Hu X, Chen D, Li X, Tang C, Zheng X. Preparation of reed-based hydrothermal carbonized carbon photocatalyst and effective degradation of methylene blue and tetracycline. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:48048-48061. [PMID: 36746863 DOI: 10.1007/s11356-023-25739-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Hydrothermal carbonation carbon (HTCC) is a promising semiconductor material for the photocatalytic degradation of pollutants. However, the poor charge transfer capability of HTCC and the unclear mechanism of photocatalysis limit its practical application. In this study, a novel Z-type heterojunction photocatalyst of silver carbonate (Ag2CO3) and HTCC (Ag2CO3/HTCC) was developed for the degradation of methylene blue (MB) and tetracycline (TC) from wastewater using a hydrothermal- coprecipitation method. Compared to Ag2CO3 and HTCC, 40% Ag2CO3/HTCC had excellent photocatalytic activity and stability. The free radical scavenger experiments showed that •O2- and h+ were the main substances for the degradation of MB and TC. The intermediates formed during the photodegradation were identified by HPLC-MS, and a possible mechanism and pathway for the degradation of MB and TC by Ag2CO3/HTCC was proposed. This study provides a new idea for the synthesis of Z-type HTCC heterojunction with a high-photocatalytic efficiency and its photocatalytic mechanism.
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Affiliation(s)
- Hao Xu
- School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Yangyuan Ou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Xinjiang Hu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Daihui Chen
- Changsha Forest Protection Station, Changsha, 410004, China
| | - Xingong Li
- School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Chunfang Tang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Xia Zheng
- School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
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7
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Chen J, Shan M, Zhu H, Zhang S, Li J, Li L. Antimicrobial properties of heterojunction BiSnSbO 6-ZnO composites in wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:55498-55512. [PMID: 36892696 DOI: 10.1007/s11356-023-25934-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 11/01/2022] [Indexed: 06/18/2023]
Abstract
BiSnSbO6-ZnO composite photocatalytic material with type II heterojunction structure was synthesized by a simple solid-phase sintering method, it was characterized by XRD, UV-vis, and PT methods. The photocatalytic antibacterial experiments were carried out under LED light irradiation. The experimental results showed that the photocatalytic antibacterial properties of BiSnSbO6-ZnO composites against bacteria and fungi were significantly stronger than those of single BiSnSbO6 and ZnO. Under light conditions, the antibacterial efficiencies of 500 mg/L BiSnSbO6-ZnO composites against E. coli, S. aureus, and P. aeruginosa reached 99.63%, 100%, and 100% for 6 h, 4 h, and 4 h, respectively. The best antibacterial concentration of BiSnSbO6-ZnO composite against the eukaryotic microorganism Candida albicans was 250 mg/L, and the antibacterial efficiency reached the highest 63.8% at 6 h. Antibacterial experiments were carried out on domestic livestock and poultry wastewater, which showed that the BiSnSbO6-ZnO composite photocatalytic material has broad-spectrum antibacterial activity against bacteria, and the antibacterial effect has species differences. Through the MTT experiment, it is proved that the prepared BiSnSbO6-ZnO composite photocatalytic material has no toxicity at the experimental concentration. According to the free radical scavenging experiment and SEM observation of the morphological changes of the bacteria after light treatment, the prepared BiSnSbO6-ZnO composite photocatalytic material can generate active species OH, h+, and e- through light irradiation to achieve the purpose of sterilization, where e- play a major role, indicating that the BiSnSbO6-ZnO composite photocatalytic material has broad application prospects in the actual antibacterial field.
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Affiliation(s)
- Jing Chen
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China
| | - Mengde Shan
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China
| | - Haojia Zhu
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China
| | - Shichuan Zhang
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China
| | - Jingmei Li
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China.
| | - Leijiao Li
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, China
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8
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Xu H, Li M, Ou Y, Li S, Zheng X, Li X, Tang C, Chen D. The reconstitution of reed cellulose by the hydrothermal carbonization and acid etching to improve the performance of photocatalytic degradation of antibiotics. Int J Biol Macromol 2023; 236:123976. [PMID: 36906212 DOI: 10.1016/j.ijbiomac.2023.123976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 03/01/2023] [Accepted: 03/04/2023] [Indexed: 03/11/2023]
Abstract
As an economical and environment-friendly material, hydrothermal carbonation carbon (HTCC) has been widely used in the field of adsorption and catalysis. Previous studies mainly used glucose as raw material to prepare HTCC. Cellulose in biomass can be further hydrolyzed into carbohydrate; however, there are few reports on the direct preparation of HTCC from biomass and the relevant synthesis mechanism is unclear. In this study, HTCC with efficient photocatalytic performance was prepared from reed straw using dilute acid etching under hydrothermal conditions and was used for the degradation of tetracycline (TC). The mechanism of photodegradation of TC by HTCC was systematically elucidated through various characterization techniques and density functional theory (DFT) calculations. This study provides a new perspective on the preparation of green photocatalysts and demonstrates their promising application in environmental remediation.
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Affiliation(s)
- Hao Xu
- School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Meifang Li
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yangyuan Ou
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Shang Li
- School of Foreign Languages, Central South University of Forestry and Technology, Changsha 410004, China
| | - Xia Zheng
- School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Xingong Li
- School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
| | - Chunfang Tang
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Daihui Chen
- Changsha Forest Protection Station, Changsha 410004, China
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9
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Li Y, Shu S, Huang L, Liu J, Liu J, Yao J, Liu S, Zhu M, Huang L. Construction of a novel double S-scheme structure WO 3/g-C 3N 4/BiOI: Enhanced photocatalytic performance for antibacterial activity. J Colloid Interface Sci 2023; 633:60-71. [PMID: 36434936 DOI: 10.1016/j.jcis.2022.11.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/01/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022]
Abstract
In recent years, the threat to human health from bacteria in wastewater has attracted attention, and photocatalytic technology has emerged as a promising strategy for inactivating bacteria in water. Therefore, it is of great research value to develop a novel high-efficiency photocatalytic system with the visible light response. We successfully designed a double S-scheme heterojunction composite WO3/g-C3N4/BiOI (WCB) in this paper. The preparation of WCB composites was demonstrated by a series of characterizations, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). The antibacterial effects of photocatalysts against representative Gram-negative strain Escherichia coli (E. coli) and Gram-positive strain Staphylococcus aureus (S. aureus) were tested under LED light irradiation. The novel photocatalyst presented excellent antibacterial properties, inactivating E. coli in 12 min and S. aureus in 20 min. The bacterial cell inactivation process was studied by scanning electron microscopy (SEM) and Confocal Laser Scanning Microscopy (CLSM). Active species capture experiments show that the active species present in the WCB composites in the process of inactivating bacteria are h+, e-, OH and O2-. In conclusion, the synthesized double S-scheme WCB photocatalyst exhibits remarkable photocatalytic antibacterial activity under LED light and has broad prospects for practical application in water antibacterial treatment.
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Affiliation(s)
- Yeping Li
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China.
| | - Shuangxiu Shu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Liying Huang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Jiawei Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Juan Liu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Jiao Yao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Shuai Liu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Menghao Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Lijing Huang
- Institute of Micro-Nano Optoelectronic and Terahertz Technology, Jiangsu University, Zhenjiang 212013, PR China
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10
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Li R, Chen T, Lu J, Hu H, Zheng H, Zhu P, Pan X. Metal-organic frameworks doped with metal ions for efficient sterilization: Enhanced photocatalytic activity and photothermal effect. WATER RESEARCH 2023; 229:119366. [PMID: 36473411 DOI: 10.1016/j.watres.2022.119366] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 11/02/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Photocatalytic and photothermal disinfection is a promising strategy for addressing the challenges of environmental microbial contamination. In this work, we choose a metal-organic framework (MOF), ZIF-8, as an inexpensive and ideal model for metal ion doping, and manipulate the band structure, thermal vibration in molecules, charge distribution, and robustness of the metal-ligand coordination bond of the metal-ion-doped ZIFs for their use in photo-disinfection. The effects of their absorption edge, rate of the photo-induced temperature rise, transient photocurrent response, photo-generated reactive oxygen species (ROS) type, and crystal stability on the photo-disinfection performance are systematically studied by varying the metal ion type (Co2+, Ni2+, or Cu2+) and doping concentration (1-100%). The results show that the efficiency of light harvesting and photogenerated carrier separation is facilitated in all doped ZIFs. The photothermal conversion gradually improves with the increasing concentration of doped Co2+/Cu2+. Remarkably, the photo-generated ROS type changes from the original singlet oxygen (1O2) to multiple ROS (1O2 and •O2-) due to the introduction of Co(II) sites. Consequently, compared with pristine ZIF-8 and other doped ZIFs, Co2+-doped ZIF-8 with a 5% doping concentration shows the highest sterilization efficiency (6.6 log10 CFU mL-1) against Escherichia coli (E. coli) under simulated sunlight within one hour by virtue of the enhanced photothermal effect and the generation of multiple ROS. This work provides insights into the application of metal-ion-doped MOF photocatalysts to the disinfection of environments with pathogenic microorganisms.
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Affiliation(s)
- Rui Li
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Tongtong Chen
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jingwen Lu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Huiling Hu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Han Zheng
- Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Pengfeng Zhu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiangliang Pan
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
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11
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Manoharan RK, Raorane CJ, Ishaque F, Ahn YH. Antimicrobial photodynamic inactivation of wastewater microorganisms by halogenated indole derivative capped zinc oxide. ENVIRONMENTAL RESEARCH 2022; 214:113905. [PMID: 35948149 DOI: 10.1016/j.envres.2022.113905] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/28/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Novel 5-bromoindole (5B)-capped zinc oxide (ZnO) nanoparticles (5BZN) were synthesized to improve the antibacterial, antibiofilm, and disinfection processes for the control of microorganisms in wastewater treatment. When exposed to 5BZN, the biofilm density and cell attachment were reduced dramatically, as measured by scanning electron microscopy (SEM). The 5BZN were also investigated for photodynamic treatment of multidrug-resistant (MDR) bacteria and toxicity. The combination of 5B and ZnO exhibited strong antibacterial and antibiofilm activities against MDR bacteria even at low doses (20 μg/mL). After 12.5 mW/cm2 blue LED irradiation, the composite 5BZN showed superior photodynamic inactivation of two wastewater MDR, Enterobacter tabaci E2 and Klebsiella quasipneumoniae SC3, with cell densities reduced by 3.9 log CFU/mL and 4.7 log CFU/mL, respectively, after 120 min. The mechanism of bacterial inactivation was studied using a scavenging investigation, and H2O2 was identified mainly as the reactive species for bacterial inactivation. The 5BZN exhibited higher photodynamic inactivation towards the total coliform bacteria in wastewater effluents under a blue LED light intensity of 12.5 mW/cm2 with almost complete inactivation of the coliform bacteria cells within 40 min. Furthermore, when 5BZN (100 mg/L) was added to the reactor, the level of tetracycline antibiotic degradation was increased by 63.6% after 120 min. The toxicity test, animal model nematode studies and seed germination assays, showed that 5BZN is harmless, highlighting its tremendous potential as a self-healing agent in large-scale photodynamic disinfection processes.
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Affiliation(s)
| | | | - Fahmida Ishaque
- Department of Civil Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea
| | - Young-Ho Ahn
- Department of Civil Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
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12
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Xia D, Chen Q, Jiao Y, Lian Q, Sun M, He C, Shang J, Wang T. A modified flower pollen-based photothermocatalytic process for enhanced solar water disinfection: Photoelectric effect and bactericidal mechanisms. WATER RESEARCH 2022; 217:118423. [PMID: 35417821 DOI: 10.1016/j.watres.2022.118423] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 03/17/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Abstract
Solar disinfection (SODIS) is regarded as an affordable and effective point-of-use (POU) water disinfection treatment urgently needed in rural developing world. This work developed an enhanced SODIS scheme that utilized a novel flower pollen-based catalyst (Te-TRP). The bench-scale experiments demonstrated 100% photothermocatalytic inactivation of approximately 7-log E. coli K-12, Spingopyxis sp. BM1-1, or S. aureus bacterium by Te-TRP within 40-60 min. Moving toward practical device design, we constructed a flow-through reactor and demonstrated the outstanding water disinfection performance of Te-TRP. The in-depth mechanistic study revealed the synergetic effect between photocatalysis and photothermal conversion and identified the bacterial inactivation pathway. 1O2 and ·O2¯ were verified to be the dominant reactive oxygen species involved in the bacterial inactivation. The damage to bacterial cells caused by photothermocatalytic reactions was systematically investigated, demonstrating the cell membrane destruction, the loss of enzyme activity, the increased cell membrane permeability, and the complete inactivation of bacteria without the viable but nonculturable state cells. This work not only affords a facile approach to preparing biomaterial-based catalysts capable of efficient photothermocatalytic bacterial inactivation, but also proposes a prototype of POU water treatment, opening up an avenue for sustainable environmental remediation.
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Affiliation(s)
- Dehua Xia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China
| | - Qi Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Yimu Jiao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Qiyu Lian
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Mingzhe Sun
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China
| | - Chun He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China.
| | - Jin Shang
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China.
| | - Tianqi Wang
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China.
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13
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Jiang Z, Tan X, Huang Y. Piezoelectric effect enhanced photocatalysis in environmental remediation: State-of-the-art techniques and future scenarios. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150924. [PMID: 34655628 DOI: 10.1016/j.scitotenv.2021.150924] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
Photocatalysis has been widely used as an advanced oxidation process to control pollutants effectively. However, environmental photocatalysis' decontamination efficiency is restricted to the photogenerated electron-hole pairs' rapid recombination. Recently, emerging investigations have been directed to generate internal electric field by piezoelectric effect to enhance the separation efficiency of photogenerated charge carriers for better photocatalytic performance; however, there are still huge knowledge gaps on the rational application of piezo-photocatalysis in environmental remediation and disinfection. Thus, we have conducted a comprehensive review to better understand the physicochemical properties of piezoelectric materials (non-centrosymmetric crystal structures, piezoelectric coefficient, Young's modulus, and etc.) and current study states. We also elucidated the strategy of piezo-photo catalysis system constructions (mono-component, core-shell structure, and etc.) and underlying mechanisms of enhanced remediation performance. Addressing the current challenges and future scenarios (degradation of organic pollutants, disinfection, and etc.), the present review would shed light on the advanced wastewater treatment development towards sustainable control of emerging containments.
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Affiliation(s)
- Zhenying Jiang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China
| | - Xianjun Tan
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China
| | - Yuxiong Huang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China.
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14
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Yang H, He D, Liu C, Zhang T, Qu J, Jin D, Zhang K, Lv Y, Zhang Z, Zhang YN. Visible-light-driven photocatalytic disinfection by S-scheme α-Fe 2O 3/g-C 3N 4 heterojunction: Bactericidal performance and mechanism insight. CHEMOSPHERE 2022; 287:132072. [PMID: 34481174 DOI: 10.1016/j.chemosphere.2021.132072] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/23/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
High-performance photocatalytic applications require to develop heterostructures between two semiconductors with matched band energy levels to facilitate charge-carrier separation. The S-scheme photocatalytic system has great potential to be explored, in terms of the improvement of charge separation, however, small efforts have been made in photocatalytic disinfection application. In this study, a non-toxic and low-cost S-scheme photocatalytic system composed of α-Fe2O3 and g-C3N4 was fabricated by in-suit production of g-C3N4 and firstly applied into water disinfection. The α-Fe2O3/g-C3N4 junction demonstrated an enhanced activity for photocatalytic bacterial inactivation, with the complete inactivation of 7 log10 cfu·mL-1 of Escherichia coli K-12 cells within 120 min under visible light irradiation. Its logarithmic bacterial inactivation efficiency was nearly 7 times better than that of single g-C3N4. The experimental results suggested that the effective prevention of charge-carrier recombination led to an improved generation of reactive oxygen species (ROSs), resulting in impressive disinfection performance. Moreover, the DNA gel electrophoresis experiments validated the reason for the irreversible death of bacteria, which was the leakage and destruction of chromosomal DNA. In addition, this S-scheme heterojunction also showed excellent photocatalytic disinfection performance in authentic water matrices (including tap water, secondary treated sewage effluent, and surface water) under visible light irradiation. Hence, the α-Fe2O3/g-C3N4 composite has great potential for sustainable and efficient photocatalytic disinfection applications.
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Affiliation(s)
- Hao Yang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Dongyang He
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Chuanhao Liu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Tingting Zhang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Jiao Qu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Dexin Jin
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Kangning Zhang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Yihan Lv
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Zhaocheng Zhang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
| | - Ya-Nan Zhang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, Jilin, 130117, China.
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15
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Ahmadi Y, Bhardwaj N, Kim KH, Kumar S. Recent advances in photocatalytic removal of airborne pathogens in air. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 794:148477. [PMID: 34198079 DOI: 10.1016/j.scitotenv.2021.148477] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/31/2021] [Accepted: 06/11/2021] [Indexed: 06/13/2023]
Abstract
The abatement of airborne pathogens such as bacteria, viruses, and fungi has become an important goal of air-quality management. Efficient and effective treatment techniques such as photocatalysis are essential for disinfection of airborne microorganisms. This review focuses on recent advances in the formulation and development of photocatalytic disinfection, design of efficient photocatalysts, choice of photocatalytic reactor, removal and/or disinfection mechanisms, and the role of reactive ion species. Data from recent studies are analyzed to accurately assess the efficacy of such disinfection approaches. This review also highlights the application of innovative materials in individual and combined abatement systems against airborne bacterial, viral, and fungal pathogens. We discuss the efficiency and benefits presented by such systems, address the challenges, and provide a perspective for future research.
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Affiliation(s)
- Younes Ahmadi
- Department of Analytical Chemistry, Kabul University, Kabul 1001, Afghanistan
| | - Neha Bhardwaj
- Department of Biotechnology, University Institute of Engineering Technology (UIET), Panjab University, Chandigarh, India
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea.
| | - Sandeep Kumar
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India.
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16
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Liu J, Huang L, Li Y, Yang L, Wang C, Liu J, Song Y, Yang M, Li H. Construction of oxygen vacancy assisted Z-scheme BiO 2-x/BiOBr heterojunction for LED light pollutants degradation and bacteria inactivation. J Colloid Interface Sci 2021; 600:344-357. [PMID: 34022730 DOI: 10.1016/j.jcis.2021.04.143] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 12/18/2022]
Abstract
It is well known that the most important task of photocatalytic technology is to synthesize photocatalysts with compact heterojunction structure and high redox ability. To achieve the goal, a novel Z-scheme BiO2-x/BiOBr heterojunction containing oxygen vacancy was synthesized by an in-situ generation process. Several techniques, X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) have verified the BiO2-x/BiOBr heterojunction. XPS and electron spin resonance (ESR) reveals the presence of oxygen vacancy in the BiO2-x/BiOBr composite. As expected, the BiO2-x/BiOBr composite showed good performance in removing Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), Rhodamine B (RhB) and tetracycline (TC). The effects of inorganic ions, pH value and water matrix were investigated with many details. The active species and proposed mechanism were revealed by trapping experiment and related characterizations. The synergistic effect of oxygen vacancy and Z-scheme heterojunction makes the BiO2-x/BiOBr composite possess excellent photocatalytic activity.
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Affiliation(s)
- Jiawei Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Liying Huang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Yeping Li
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Lei Yang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Chaobao Wang
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Juan Liu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, PR China
| | - Yanhua Song
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Mengxin Yang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Huaming Li
- Institute for Energy Research of Jiangsu University, Jiangsu University, Zhenjiang 212013, PR China
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17
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Ag-loaded and Pd-loaded ZnO nanofiber membranes: preparation via electrospinning and application in photocatalytic antibacterial and dye degradation. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-02056-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Abdel Maksoud MIA, Sami NM, Hassan HS, Bekhit M, Ashour AH. Novel adsorbent based on carbon-modified zirconia/spinel ferrite nanostructures: Evaluation for the removal of cobalt and europium radionuclides from aqueous solutions. J Colloid Interface Sci 2021; 607:111-124. [PMID: 34492348 DOI: 10.1016/j.jcis.2021.08.166] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/14/2021] [Accepted: 08/25/2021] [Indexed: 12/14/2022]
Abstract
Herein, a novel adsorbent based on carbon-modified zirconia/spinel ferrite (C@ ZrO2/Mn0.5Mg0.25Zn0.25Fe2O4) nanostructures were chemically prepared to remove 60Co and 152+154Eu radionuclides from liquid media using batch experiments. The XRD pattern confirms the successful preparation of the C@ZrO2/MnMgZnFe2O4 composite. Also, SEM and TEM images confirmed that the composite owns a heterogeneous morphology in the nanoscale range. The optical band gap value of Mn0.5Mg0.25Zn0.25Fe2O4, ZrO2, and the composite samples was 1.45, 2.38, and 1.54 eV, respectively. Many parameters have been studied as the effect of time, solution pH, and initial ion concentration. The kinetics models for the removal process of 152+154Eu and 60Co radionuclides were studied. The second-order kinetic equation could describe the sorption kinetics for both radionuclides. The Langmuir monolayer capacity for 60Co was 82.51 mg/g and for 152+154Eu was 136.98 mg/g. The thermodynamic parameters such as free energy ΔGo, the enthalpy ΔHo, and the entropy ΔSo were calculated. The results indicated that the sorption process has endothermic nature for both two radionuclides onto C@ZrO2/MnMgZnFe2O4 composite.
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Affiliation(s)
- M I A Abdel Maksoud
- Materials Science Laboratory, Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
| | - N M Sami
- Hot Lab. Center, Egyptian Atomic Energy Authority (EAEA), P.O. 13759, Inshas, Cairo, Egypt
| | - H S Hassan
- Hot Lab. Center, Egyptian Atomic Energy Authority (EAEA), P.O. 13759, Inshas, Cairo, Egypt
| | - M Bekhit
- Radiation Chemistry Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - A H Ashour
- Materials Science Laboratory, Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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19
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Wang T, Dissanayake PD, Sun M, Tao Z, Han W, An N, Gu Q, Xia D, Tian B, Ok YS, Shang J. Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar: Role of iodine doping and reactive species. ENVIRONMENTAL RESEARCH 2021; 197:111026. [PMID: 33744265 DOI: 10.1016/j.envres.2021.111026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/28/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Here we developed the functionalized biochar as low-cost and heavy metal-free photocatalysts via a facile iodine doping method, which exhibit efficient adsorption and visible-light-driven photocatalytic degradation of representative organic pollutants, phenol and tetracycline. On one hand, iodine doping elevates the adsorption via creating extra pores, e.g., the adsorbed amounts of phenol by iodine-doped WSP and OSR biochar are increased by 161.8% and 146.3%, respectively, which in turn facilitates the photocatalytic oxidation of the adsorbed pollutants. On the other hand, iodine doping leads to the strong photo-induced excitation and remarkably reduced charge carrier transfer resistance, boosting the photocatalytic activity of iodine-doped biochar by more than 20 orders towards organic pollutants (e.g., phenol) degradation. The systematic analysis of reactive species reveals the active roles of O2-, H2O2, 1O2, OH, electrons, and holes in photocatalytic process and identifies O2- to be the major contributor. This work affords a facile approach to generating porous and visible-light-driven photocatalyst from biomass for efficient adsorbing and degrading organic pollutants, opening up an avenue to turn biowaste into biomaterials for sustainable environmental remediation.
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Affiliation(s)
- Tianqi Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China; School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Pavani Dulanja Dissanayake
- Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Mingzhe Sun
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518060, China
| | - Zeyu Tao
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518060, China
| | - Wei Han
- College of Land and Environment, Shenyang Agricultural University, NO. 120 Dongling Road, Shenhe District, Shenyang, 110866, China
| | - Ning An
- College of Land and Environment, Shenyang Agricultural University, NO. 120 Dongling Road, Shenhe District, Shenyang, 110866, China
| | - Qinfen Gu
- The Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Dehua Xia
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Bingbing Tian
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China.
| | - Yong Sik Ok
- Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
| | - Jin Shang
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518060, China.
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20
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Photocatalytic Bactericidal Performance of LaFeO3 under Solar Light: Kinetics, Spectroscopic and Mechanistic Evaluation. WATER 2021. [DOI: 10.3390/w13091135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lanthanum orthoferrites are a versatile class of catalysts. Here, the photocatalytic bactericidal performance of LaFeO3 (LF) to inactivate pathogenic microorganisms, i.e., Escherichia coli (E. coli), in water under simulated solar irradiation conditions was investigated. Various competing and contributing factors were covered to visualize the reaction medium consisting of E. coli K12 cells, organic sub-fractions formed by cell destruction, and LF surface. LF solar photocatalytic inactivation (SPCI) kinetics revealed the highest inactivation rate in ultrapure water as expected, followed by distilled water (DW), aqueous solution containing anions and cations (WM) and saline solution (SS). Characterization of the released organic matter was achieved by UV-vis and fluorescence spectroscopic techniques as well as organic carbon contents (DOC). Upon SPCI, significant amounts of K+ along with released protein contents were detected expressing cell wall destruction and lysis. Under the specified experimental conditions, in the presence of released intracellular organic and inorganic components via cell lysis, a significant count of E. coli was still present in SS, whereas almost all bacteria were removed in other matrices due to various challenging reasons. Based on the presented data, SPCI of E. coli using LF as a novel photocatalyst was successfully demonstrated as an alternative and promising method for disinfection purposes.
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21
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Cai H, Li X, Ma D, Feng Q, Wang D, Liu Z, Wei X, Chen K, Lin H, Qin S, Lu F. Stable Fe 3O 4 submicrospheres with SiO 2 coating for heterogeneous Fenton-like reaction at alkaline condition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 764:144200. [PMID: 33418355 DOI: 10.1016/j.scitotenv.2020.144200] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 06/12/2023]
Abstract
In the traditional Fenton process, the efficient generation of hydroxyl radical (HO) strongly relies on an acidic circumstance and the iron ions would precipitate and form large amounts of hazardous iron-containing sludge at alkaline pH. To realize stable heterogeneous Fenton-like catalytic degradation at alkaline condition, Fe3O4 submicrospheres with SiO2 coating were successfully synthesized by using water glass as the silica sources via a facile ultrasound assisted method. The as-obtained Fe3O4@SiO2 spheres were further used as catalysts for the Fenton-like degradation of tetracycline hydrochloride (TC). The Fe3O4@SiO2 submicrospheres exhibited superior catalytic activity in higher pH environment (pH value = 11), and the degradation efficiency toward TC was ca. 80% after ten successive runs. The kinetics for the catalytic degradation of TC were agreed well with the second-order kinetic model. The reaction rate constant (k) over the Fe3O4@SiO2 submicrospheres at a pH value of 11 was 7.69 times greater than that at a pH value of 3. Reactive species scavenging experiments revealed that HO and superoxide radical (O2- / HO2-) played a dominant role during the Fenton-like degradation of TC at pH 3 and pH 11, respectively. Possible Fenton-like degradation pathways of TC were proposed through the identification of intermediates using the high performance liquid chromatography coupled with mass spectrometry (HPLC-MS), which involved cleavage of methyl groups, N-dimethyl group, and hydroxy groups, ring-opening reaction, etc. The degradation efficiency of TC was close to 91.5% and total organic carbon (TOC) in solution was eliminated by about 41.4% at the optimized conditions. In a word, with the unique acidic surface properties and abundant Si-OH bonds, the Fe3O4@SiO2 submicrospheres exhibited well dispersion, good catalytic activity, strong alkali resistance and excellent recyclability in an ultrasonic-Fenton-like system.
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Affiliation(s)
- Huidong Cai
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Xiang Li
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, PR China
| | - Dachao Ma
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China
| | - Qingge Feng
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China.
| | - Dongbo Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China
| | - Zheng Liu
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China
| | - Xu Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China
| | - Kao Chen
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
| | - Haiying Lin
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China
| | - Siying Qin
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China; Guangxi Universities Key Laboratory of Environmental Protection, Guangxi University, Nanning 530004, PR China
| | - Feiyan Lu
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, PR China
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Chan HS, Xiao K, Tsang TH, Zeng C, Wang B, Peng X, Wong PK. Bioremediation of Crude Glycerol by a Sustainable Organic-Microbe Hybrid System. Front Microbiol 2021; 12:654033. [PMID: 33967990 PMCID: PMC8103898 DOI: 10.3389/fmicb.2021.654033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/01/2021] [Indexed: 11/13/2022] Open
Abstract
Klebsiella pneumoniae with crude glycerol-utilizing and hydrogen (H2)-producing abilities was successfully isolated from return activated sludge from Shatin Sewage Treatment Works. The H2 production strategy used in this study was optimized with crude glycerol concentrations, and 1,020 μmol of H2 was generated in 3 h. An organic–microbe hybrid system was constructed with metal-free hydrothermal carbonation carbon (HTCC) microspheres to enhance the H2 production under visible light (VL) irradiation. Under optimized VL intensity and HTCC concentration, an elevation of 35.3% in H2 production can be obtained. Electron scavenger study revealed that the photogenerated electrons (e–) from HTCC contributed to the additional H2 production. The variation in intercellular intermediates, enzymatic activity, and reducing equivalents also suggested that the photogenerated e– interacted with K. pneumoniae cells to direct the metabolic flux toward H2 production. This study demonstrated the feasibility of using an organic–microbe hybrid system as a waste-to-energy technology.
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Affiliation(s)
- Ho Shing Chan
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kemeng Xiao
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Tsz Ho Tsang
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Cuiping Zeng
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Bo Wang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Xingxing Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.,Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, China
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Enhanced Fenton-like degradation of sulfadiazine by single atom iron materials fixed on nitrogen-doped porous carbon. J Colloid Interface Sci 2021; 597:56-65. [PMID: 33862447 DOI: 10.1016/j.jcis.2021.03.168] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/18/2021] [Accepted: 03/29/2021] [Indexed: 11/24/2022]
Abstract
The use of single-atom iron catalysts in heterogeneous Fenton-like reactions has demonstrated tremendous potential for antibiotic wastewater treatment. In this study, single-atom iron fixed on nitrogen-doped porous carbon materials (Fe-ISAs@CN) was synthesised using a metal organic framework (MOF) as a precursor. Fe-ISAs@CN was applied as a heterogeneous Fenton catalyst to activate H2O2 for the degradation of sulfadiazine (SDZ) in an aqueous solution. The physical and chemical properties of Fe-ISAs@CN were characterised by scanning electron microscopy (SEM), transmission electron microscope (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and rotating disk electrode (RDE) measurements. The results of our degradation experiments indicated that Fe-ISAs@CN exhibited remarkable activity and stability for the degradation of SDZ over a wide pH range; even after five cycles, Fe-ISAs@CN retained a high catalytic efficiency (>80%). The 5,5-dimethyl-1-oxaporphyrin-n-oxide (DMPO)-X signal captured by electron paramagnetic resonance (EPR) spectroscopy indicated that a large amount of hydroxyl radicals (OH) was produced in the reaction system. Quench tests indicated that the OH was the main active substance in the degradation of SDZ. The degradation products of the reaction were analysed by High Performance Liquid Chromatography-Mass Spectrometry (HPLC-MS), and possible degradation pathways for the SDZ degradation were proposed.
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24
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Li J, Liu B, Han X, Liu B, Jiang J, Liu S, Zhang J, Shi H. Direct Z-scheme TiO2-x/AgI heterojunctions for highly efficient photocatalytic degradation of organic contaminants and inactivation of pathogens. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118306] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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25
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Tombuloglu H, Slimani Y, AlShammari TM, Tombuloglu G, Almessiere MA, Sozeri H, Baykal A, Ercan I. Delivery, fate and physiological effect of engineered cobalt ferrite nanoparticles in barley (Hordeum vulgare L.). CHEMOSPHERE 2021; 265:129138. [PMID: 33279234 DOI: 10.1016/j.chemosphere.2020.129138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 06/12/2023]
Abstract
Cobalt ferrite nanoparticles (CoFe2O4 NPs) have received increasing attention in a widespread application. This work examines the fate and impact of terbium (Tb) substituted CoFe2O4 NPs on the growth, physiological indices, and magnetic character of barley (Hordeum vulgare L.). Sonochemically synthesized NPs were hydroponically applied on barley with changing doses (125-1000 mg/L) at germination and seedling (three weeks) stages. Results revealed a significant reduction in germination rate (∼37% at 1000 mg/L); however, a remarkable growth (∼38-65%) and biomass (∼72-133%) increase were detected at three weeks of exposure (p < 0.05). The elements that make up the NPs (i.e., Tb, Co, and Fe) increased significantly in both root and leaf tissues, indicating the translocation of NPs from the root to leaf. Vibrating-sample magnetometer (VSM) analysis confirmed this finding, where magnetic signals in the root and leaf samples of the control were respectively about 26 and 75 times lower than that of NPs-treated tissues. Also, the accumulation of NPs altered the leaf photoluminescence (PL) behavior, which may have contributed to the biomass increase. Overall, Tb-doped CoFe2O4 NPs translocate from root-to-leaf and enhance plant growth, possibly due to i) incorporation of iron within tissues, and ii) changes in photoluminescence. However, since its effects on other living things are not known yet, its agricultural use and release to nature should be considered well.
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Affiliation(s)
- Huseyin Tombuloglu
- Department of Genetics Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.
| | - Yassine Slimani
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Thamer Marhoon AlShammari
- Department of Genetics Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia
| | - Guzin Tombuloglu
- Adnan Kahveci Mah., Mimar Sinan Cad., Mavisu Evl., 7/28 Beylikduzu, Istanbul, Turkey
| | - Munirah A Almessiere
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Huseyin Sozeri
- TUBITAK-UME, National Metrology Institute, P.O. Box 54, Gebze, Kocaeli, 41470, Turkey
| | - Abdulhadi Baykal
- Department of Nanomedicine, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Ismail Ercan
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Saudi Arabia
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Rabbani A, Haghniaz R, Khan T, Khan R, Khalid A, Naz SS, Ul-Islam M, Vajhadin F, Wahid F. Development of bactericidal spinel ferrite nanoparticles with effective biocompatibility for potential wound healing applications. RSC Adv 2021; 11:1773-1782. [PMID: 35424142 PMCID: PMC8693516 DOI: 10.1039/d0ra08417d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 12/20/2020] [Indexed: 12/18/2022] Open
Abstract
The current study was devised to explore the antibacterial activity and underlying mechanism of spinel ferrite nanoparticles (NPs) along with their biocompatibility and wound healing potentials. In this regard, nickel ferrite and zinc/nickel ferrite NPs were synthesized via a modified co-precipitation method and were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy Energy-dispersive X-ray spectroscopy (EDX). The biocompatibility of the synthesized NPs with human dermal fibroblast (HDF) and red blood cells (RBCs) was assessed. The biocompatible concentrations of the NPs were used to investigate the antimicrobial activity against various pathogenic Gram-negative and Gram-positive bacteria. The mode of bactericidal action was also explored. In vitro scratch assay was performed to evaluate the wound healing potential of NPs. The SEM-EDX analysis showed that the average particles size of nickel ferrite and zinc/nickel ferrite were 49 and 46 nm, respectively, with appropriate elemental composition and homogenous distribution. The XRD pattern showed all the characteristic diffraction peaks of spinel ferrite NPs, which confirmed the synthesis of the pure phase cubic spinel structure. The biocompatible concentration of nickel ferrite and zinc/nickel ferrite NPs was found to be 250 and 125 μg ml-1, respectively. Both the NPs showed inhibition against all the selected strains in the concentration range of 50 to 1000 μg ml-1. Studies on the underlying antimicrobial mechanism revealed damage to the cell membrane, protein leakage, and intracellular reactive oxygen species production. The in vitro scratch assay confirmed the migration and proliferation of fibroblast with artificial wound shrinkage. This study shows that nickel ferrite and zinc/nickel ferrite NPs could be a strong candidate for antibacterial and wound healing nano-drugs.
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Affiliation(s)
- Atiya Rabbani
- Department of Biotechnology, COMSATS University Islamabad Abbottabad Campus Pakistan
| | - Reihaneh Haghniaz
- Khademhosseini's Laboratory, Center for Minimally Invasive Therapeutics (CMIT) California NanoSystems Institute, University of California Los Angles Los Angles USA
| | - Taous Khan
- Department of Pharmacy, COMSATS University Islamabad Abbottabad Campus Pakistan
| | - Romana Khan
- Department of Environmental Sciences, COMSATS University Islamabad Abbottabad Campus Pakistan
| | - Ayesha Khalid
- Department of Biotechnology, COMSATS University Islamabad Abbottabad Campus Pakistan
| | - Syeda Sohaila Naz
- Department of Nanosciences and Technology, National Centre for Physics Islamabad Pakistan
| | - Mazhar Ul-Islam
- Department of Chemical Engineering, College of Engineering, Dhofar University Salalah Oman
| | | | - Fazli Wahid
- Department of Biotechnology, COMSATS University Islamabad Abbottabad Campus Pakistan
- Department of Biomedical Sciences, Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology Mang, Khanpur Road Haripur Pakistan
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27
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Disinfection of Wastewater by UV-Based Treatment for Reuse in a Circular Economy Perspective. Where Are We at? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 18:ijerph18010077. [PMID: 33374200 PMCID: PMC7795268 DOI: 10.3390/ijerph18010077] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/11/2020] [Accepted: 12/20/2020] [Indexed: 02/07/2023]
Abstract
Among the critical issues that prevent the reuse of wastewater treatment plants (WWTPs) effluents in a circular economy perspective, the microbiological component plays a key role causing infections and diseases. To date, the use of conventional chemical oxidants (e.g., chlorine) represent the main applied process for wastewater (WW) disinfection following a series of operational advantages. However, toxicity linked to the production of highly dangerous disinfection by-products (DBPs) has been widely demonstrated. Therefore, in recent years, there is an increasing attention to implement sustainable processes, which can simultaneously guarantee the microbiological quality of the WWs treated and the protection of both humans and the environment. This review focuses on treatments based on ultraviolet radiation (UV) alone or in combination with other processes (sonophotolysis, photocatalysis and photoelectrocatalysis with both natural and artificial light) without the dosage of chemical oxidants. The strengths of these technologies and the most significant critical issues are reported. To date, the use of synthetic waters in laboratory tests despite real waters, the capital and operative costs and the limited, or absent, experience of full-scale plant management (especially for UV-based combined processes) represent the main limits to their application on a larger scale. Although further in-depth studies are required to ensure full applicability of UV-based combined processes in WWTPs for reuse of their purified effluents, excellent prospects are presented thanks to an absent environmental impact in terms of DBPs formation and excellent disinfection yields of microorganisms (in most cases higher than 3-log reduction).
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28
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Chen CR, Wang XD, Wang SL, Zhang JL, Tian BZ. Direct Z‐Scheme Structure
g
‐C
3
N
4
‐BiOI with Highly Efficient Visible‐Light‐Driven Photocatalytic Activity for Bacteria Inactivation. ChemistrySelect 2020. [DOI: 10.1002/slct.202003942] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cuirong R. Chen
- Key Lab for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Rd. Shanghai 200237 PR China
| | - Xiaodong D. Wang
- Shanghai Academy of Spaceflight Technology 3888 Yuanjiang Rd. Shanghai 201109 PR China
| | - Shilin L. Wang
- Key Lab for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Rd. Shanghai 200237 PR China
| | - Jinlong L. Zhang
- Key Lab for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Rd. Shanghai 200237 PR China
| | - Baozhu Z. Tian
- Key Lab for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Rd. Shanghai 200237 PR China
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29
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Hu Z, Liu W. Conversion of Biomasses and Copper into Catalysts for Photocatalytic CO 2 Reduction. ACS APPLIED MATERIALS & INTERFACES 2020; 12:51366-51373. [PMID: 33155808 DOI: 10.1021/acsami.0c13323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The rapid increase of CO2 in the atmosphere has caused serious environmental problems. Burning of biomass wastes increases the content of CO2 in the environment. Herein, we propose a new strategy to convert biomass into photocatalysts for artificial CO2 reduction. Using a hydrothermal method, carbohydrates from biomass can be converted into hydrothermal carbonaceous carbon (HTCC). The HTCC consists of plenty of sp2-hybridized structures, which are capable of absorbing solar light for photocatalytic CO2 reduction. Furthermore, with the addition of Cu cocatalysts, higher activity can be obtained for CO2 reduction. The activity of Cu-HTCC is 32 and 1.7 times higher than that of commercial TiO2 and pure HTCC, respectively. This method provides a new strategy of trash to treasure, which converts biomass waste into photocatalysts for CO2 reduction.
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Affiliation(s)
- Zhuofeng Hu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Weiwei Liu
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
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30
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Liu F, Nie C, Dong Q, Ma Z, Liu W, Tong M. AgI modified covalent organic frameworks for effective bacterial disinfection and organic pollutant degradation under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2020; 398:122865. [PMID: 32470769 DOI: 10.1016/j.jhazmat.2020.122865] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 05/01/2020] [Accepted: 05/02/2020] [Indexed: 06/11/2023]
Abstract
Covalent organic frameworks (COFs) have recently been demonstrated to have great application potentials in water treatment. Their photocatalytic performance towards bacterial disinfection and organic pollutant degradation yet has seldom been investigated. In this study, AgI modified COFs (using 2,5-diaminopyridine and 1,3,5-triformylphloroglucinol as precursors) (COF-PD/AgI) were fabricated and their applications to photocatalytically disinfect bacteria and degrade organic pollutants were investigated. COF-PD/AgI exhibited effective photocatalytic performance towards Escherichia coli disinfection and organic pollutant (Rhodamine B and acetaminophen) degradation. SEM images were employed to investigate cell disinfection process, while theoretical density functional theory (DFT) calculation and intermediates determination were used to elucidate organic pollutant degradation processes. Scavenger experiments, ESR spectra and chemical probes experiments confirmed O2-, h+ and OH played important roles in the photocatalytic process. The formation of dual-band Z-scheme heterojunction improved photocatalytic performance. COF-PD/AgI remained high photocatalytic activity in the four consecutive cycles and could serve as a promising photocatalyst for water purification.
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Affiliation(s)
- Fuyang Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China
| | - Chenyi Nie
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China
| | - Qiqi Dong
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China
| | - Zhiyao Ma
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China
| | - Wen Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China
| | - Meiping Tong
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China.
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Niu Z, Feng W, Huang H, Wang B, Chen L, Miao Y, Su S. Green synthesis of a novel Mn-Zn ferrite/biochar composite from waste batteries and pine sawdust for Pb 2+ removal. CHEMOSPHERE 2020; 252:126529. [PMID: 32220718 DOI: 10.1016/j.chemosphere.2020.126529] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/14/2020] [Accepted: 03/16/2020] [Indexed: 05/04/2023]
Abstract
Magnetic ferrite/biochar composites are a kind of promising adsorbents due to their high adsorption efficiency and facile magnetic separation; however, their synthesis is associated with high cost and secondary environmental impacts. In this study, a novel Mn-Zn ferrite/biochar composite (MZF-BC) is synthesized via a green two-step biocheaching and hydrothermal method using waste batteries and pine sawdust. Characterization results indicate that the introduced Mn-Zn ferrite particles are successfully embedded and coated on biochar (BC), and synthesized MZF-BC50 with 50% BC content exhibits best performance with a specific surface area of 138.5 m2 g-1, the saturation magnetization of 27.5 emu g-1 and CEC value of 53.2 mmol 100 g-1. The maximum adsorption capacity of Pb2+ is 99.5 mg g-1 based on the Langmuir sorption isotherm study at 298 K, and pseudo-second-order model accurately describes the adsorption process. Regeneration test suggests that MZF-BC50 can be efficiently reused for 6 cycles. In addition, it exhibits a good selective Pb2+ and Cd2+ removal performance in lead-acid battery wastewater. The results illustrate that this newly developed material has low cost and rapid remediation of Pb2+ as good application potential.
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Affiliation(s)
- Zhirui Niu
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China.
| | - Wenli Feng
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China
| | - Hua Huang
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China
| | - Bo Wang
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China
| | - Lan Chen
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China
| | - Yibo Miao
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China
| | - Shuai Su
- School of Petroleum and Environmental Engineering, Yan'an University, Yan'an, 716000, PR China
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Non-high temperature method to synthesize carbon coated TiO2 nano-dendrites for enhanced wide spectrum photocatalytic hydrogen evolution activity. J Colloid Interface Sci 2020; 571:412-418. [DOI: 10.1016/j.jcis.2020.03.066] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/16/2020] [Accepted: 03/17/2020] [Indexed: 11/23/2022]
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Wang T, Wang Y, Sun M, Hanif A, Wu H, Gu Q, Ok YS, Tsang DCW, Li J, Yu J, Shang J. Thermally treated zeolitic imidazolate framework-8 (ZIF-8) for visible light photocatalytic degradation of gaseous formaldehyde. Chem Sci 2020; 11:6670-6681. [PMID: 34094125 PMCID: PMC8159372 DOI: 10.1039/d0sc01397h] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 05/20/2020] [Indexed: 01/21/2023] Open
Abstract
The development of wide-spectrum responsive photocatalysts for efficient formaldehyde (HCHO) removal is highly desired yet remains a great challenge. Here we successfully converted zeolitic imidazolate framework-8 (ZIF-8), one of the most well-studied metal-organic frameworks (MOFs), from routine ultraviolet-driven to novel broad-spectrum-driven photocatalyst via a facile thermal treatment. The isocyanate groups (-N[double bond, length as m-dash]C[double bond, length as m-dash]O) formed in the thermally treated ZIF-8 (ZIF-8-T) is crucial in enabling the superior photocatalytic performance in formaldehyde degradation. Specifically, the best-performing ZIF-8-T sample showed around 2.1 and 9.4 times the HCHO adsorption amount and the solar photocatalytic degradation rate, respectively, of pristine ZIF-8. In addition, ZIF-8-T exhibited visible light (λ ≥ 400 nm) photocatalytic HCHO degradation performance, photo-converting 72% and nearly 100% of 20 ppm and 10 ppm HCHO within 1 hour, respectively. This work affords new insights and knowledge that inspire and inform the design and development of MOF-based photocatalysts with broad-spectrum responses for efficient air purification operations.
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Affiliation(s)
- Tianqi Wang
- School of Energy and Environment, City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China +852 3442 0688 +852 3442 7714
- City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District Shenzhen China
| | - Yufei Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University Changchun 130012 China +86 431 8516 8608 +86 431 8516 8608
| | - Mingzhe Sun
- School of Energy and Environment, City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China +852 3442 0688 +852 3442 7714
- City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District Shenzhen China
| | - Aamir Hanif
- School of Energy and Environment, City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China +852 3442 0688 +852 3442 7714
- City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District Shenzhen China
| | - Hao Wu
- School of Energy and Environment, City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China +852 3442 0688 +852 3442 7714
| | - Qinfen Gu
- The Australian Synchrotron (ANSTO) 800 Blackburn Road Clayton VIC 3168 Australia
| | - Yong Sik Ok
- Korea Biochar Research Center, O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University Seoul 02841 Republic of Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China +852 2334 6389 +852 2766 6045
| | - Jiyang Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University Changchun 130012 China +86 431 8516 8608 +86 431 8516 8608
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University Changchun 130012 China +86 431 8516 8608 +86 431 8516 8608
| | - Jin Shang
- School of Energy and Environment, City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China +852 3442 0688 +852 3442 7714
- City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District Shenzhen China
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Li H, Lin M, Xiao T, Long J, Liu F, Li Y, Liu Y, Liao D, Chen Z, Zhang P, Chen Y, Zhang G. Highly efficient removal of thallium(I) from wastewater via hypochlorite catalytic oxidation coupled with adsorption by hydrochar coated nickel ferrite composite. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:122016. [PMID: 31958614 DOI: 10.1016/j.jhazmat.2020.122016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/30/2019] [Accepted: 01/01/2020] [Indexed: 06/10/2023]
Abstract
In this study, tannery wastewater was used as carbon source to hydrothermally synthesize magnetic carbon-coated nickel ferrite composite (NiFe2O4@C), which was employed as a catalyst for thallium (Tl) oxidation by hypochlorite and simultaneously as an adsorbent for Tl removal from wastewater. Compared with NiFe2O4@C adsorption or hypochlorite oxidation alone, the combination of NiFe2O4@C and hypochlorite substantially enhanced the rate and efficiency of Tl(I) removal. In addition, this process was highly effective for Tl(I) removal over a wide pH range (6-12). The maximum Tl(I) removal capacity was 1699 mg/g at pH 10, which is the highest one reported so far. Electron spin resonance spectra suggested the formation of hypochlorite-based free radicals induced by the NiFe2O4@C composite, which enhanced the Tl(I) oxidation and removal. Oxidation-induced surface precipitation and surface complexation were found to be the main Tl(I) removal mechanisms. Consecutive cyclic regeneration tests implied robust regeneration and reuse performance of the composite. Moreover, it was effective for Tl(I) removal from real industrial wastewater. Therefore, the hypochlorite catalytic oxidation coupled with adsorption by the magnetic NiFe2O4@C composite is a promising technique for Tl(I) removal from wastewater. This hybrid process also has great potential for the removal of other pollutants.
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Affiliation(s)
- Huosheng Li
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China
| | - Mao Lin
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Tangfu Xiao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jianyou Long
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Fengli Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yuting Li
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yu Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Dandan Liao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Zexin Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Ping Zhang
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yongheng Chen
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China
| | - Gaosheng Zhang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China.
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Yu X, Lin Y, Liu H, Yang C, Peng Y, Du C, Wu S, Li X, Zhong Y. Photocatalytic performances of heterojunction catalysts of silver phosphate modified by PANI and Cr-doped SrTiO3 for organic pollutant removal from high salinity wastewater. J Colloid Interface Sci 2020; 561:379-395. [DOI: 10.1016/j.jcis.2019.10.123] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/30/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
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Xiao K, Wang T, Sun M, Hanif A, Gu Q, Tian B, Jiang Z, Wang B, Sun H, Shang J, Wong PK. Photocatalytic Bacterial Inactivation by a Rape Pollen-MoS 2 Biohybrid Catalyst: Synergetic Effects and Inactivation Mechanisms. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:537-549. [PMID: 31830789 DOI: 10.1021/acs.est.9b05627] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A novel and efficient 3D biohybrid photocatalyst, defective MoS2 nanosheets encapsulated carbonized rape pollen, was fabricated and applied to water disinfection. The rape pollen-MoS2 (PM) biohybrid showed excellent dispersibility, high stability, and efficient charge-carrier separation and migration ability, resulting in the highly enhanced photocatalytic inactivation performance toward various waterborne bacteria under different light sources. The inactivation mechanisms were systematically investigated. Reactive species (RSs), including electrons, holes, and reactive oxygen species (•O2- and •OH), played major roles in inactivating bacteria. The antioxidant system of bacteria exhibited a self-protection capacity by eliminating the photogenerated RSs from PM biohybrid at the early stage of inactivation. With the accumulation of RSs, the cell membrane and membrane-associated functions were destroyed, as suggested by the collapse of cell envelope and subsequent loss of cell respiration and ATP synthesis capacity. The microscopic images further confirmed the destruction of the bacterial membrane. After losing the membrane barrier, the oxidation of cytoplasmic proteins and lipids caused by invaded RSs occurred readily. Finally, the leakage of DNA and RNA announced the irreversible death of bacteria. These results indicated that the bacterial inactivation began with the membrane rupture, followed by the oxidation and leakage of intracellular substances. This work not only provided a new insight into the combination of semiconductors with earth-abundant biomaterials for fabricating high-performance photocatalysts, but also revealed the underlying mechanisms of photocatalytic bacterial inactivation in depth.
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Affiliation(s)
- Kemeng Xiao
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR 999077, China
| | - Tianqi Wang
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, 8 Yuexing first Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen 518057, China
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Mingzhe Sun
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, 8 Yuexing first Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen 518057, China
| | - Aamir Hanif
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, 8 Yuexing first Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen 518057, China
| | - Qinfen Gu
- The Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Bingbing Tian
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Zhifeng Jiang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR 999077, China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
- Institute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Bo Wang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR 999077, China
| | - Hongli Sun
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR 999077, China
| | - Jin Shang
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
- City University of Hong Kong Shenzhen Research Institute, 8 Yuexing first Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen 518057, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR 999077, China
- Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
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Synthesis of a Novel Catalyst MnO/CNTs for Microwave-Induced Degradation of Tetracycline. Catalysts 2019. [DOI: 10.3390/catal9110911] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Microwave-induced catalytic degradation (MICD) has been considered as one of the most prospective approaches to remove organic contaminants from water. High-performance catalysts, ideally offering efficient degradation ability, are essential to this process. This work reports the fabrication of manganese oxide on carbon nanotubes (MnO/CNTs) as an efficient catalyst under microwave irradiation (MI) to remove tetracycline (TC) from aqueous solution. The hybrid MnO/CNTs structure shows excellent performance in TC degradation. Combining experimental characterization and theoretical calculations, synergistic mechanisms are revealed: (i) Strong MnO/CNTs interaction stabilizes Mn(II) through interfacial bonding; (ii) high-spin states associated with low coordinated Mn(II) play a major role in MICD; and (iii) superoxide radicals (•O2−) and hydroxyl radicals (•OH) induced by microwave input are identified as the major active species.
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Li Y, Zhao J, Zhang G, Zhang L, Ding S, Shang E, Xia X. Visible-light-driven photocatalytic disinfection mechanism of Pb-BiFeO 3/rGO photocatalyst. WATER RESEARCH 2019; 161:251-261. [PMID: 31202112 DOI: 10.1016/j.watres.2019.06.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 05/09/2019] [Accepted: 06/04/2019] [Indexed: 06/09/2023]
Abstract
While the visible-light-driven photocatalytic disinfection techniques for drinking water have recently attracted tremendous attentions, it is necessary to further improve the solar energy utilization efficiency. In this study, we synthesized Pb-BiFeO3 photocatalysts doped with different amounts of reduced graphene oxide (Pb-BiFeO3/rGO). The photocatalytic disinfection efficiencies toward gram-negative Escherichia coli (E. coli) and gram-positive Staphylococcus aureus (S. aureus) were evaluated under visible-light irradiation (λ ≥ 400 nm). The results indicated that Pb-BiFeO3 with 0.5 wt% rGO (Pb-BiFeO3/0.5% rGO) exhibited the highest disinfection efficiency. Complete inactivation was reached within 30 min and 90 min for E. coli and S. aureus, respectively. The transcriptomic analysis results indicated that Pb-BiFeO3/0.5% rGO deregulates the genes in E. coli cells that are involved in the cell membrane damage and oxidative stress responses. This was validated by the cell leakage of nucleic acids or proteins, transmission electron microscopy images of the bacteria, and the disinfection efficiency decrease caused by the introduction of scavenger of hydroxyl radical (HO•). Metal ions (Pb2+, Bi2+, and Fe3+) released from the photocatalysts did not contribute to the disinfection process. For the first time, our results elucidated that the photocatalytic disinfection mechanism of Pb-BiFeO3/rGO toward E. coli was mainly associated with oxidative stress due to HO• generation and the loss of membrane integrity from direct contact with the photocatalyst. After four consecutive cycles, the Pb-BiFeO3/0.5% rGO photocatalyst exhibited a strong antibacterial efficiency. The excellent disinfection efficiency and stability of Pb-BiFeO3/0.5% rGO suggests that this photocatalyst shows great potential for drinking water disinfection.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Jian Zhao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Guangshan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Lilan Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, PR China
| | - Shiyuan Ding
- Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, PR China
| | - Enxiang Shang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China
| | - Xinghui Xia
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, PR China.
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Jiao S, Liu L. Friction-Induced Enhancements for Photocatalytic Degradation of MoS2@Ti3C2 Nanohybrid. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03680] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Songlong Jiao
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, People’s Republic of China
| | - Lei Liu
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, People’s Republic of China
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40
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Ho SH, Chen YD, Li R, Zhang C, Ge Y, Cao G, Ma M, Duan X, Wang S, Ren NQ. N-doped graphitic biochars from C-phycocyanin extracted Spirulina residue for catalytic persulfate activation toward nonradical disinfection and organic oxidation. WATER RESEARCH 2019; 159:77-86. [PMID: 31078754 DOI: 10.1016/j.watres.2019.05.008] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/06/2019] [Accepted: 05/03/2019] [Indexed: 06/09/2023]
Abstract
Biochars are low-cost and environmental-friendly materials, which are promising in wastewater treatment. In this study, biochars were manufactured from C-phycocyanin extracted (C-CP) Spirulina residue (SDBC) via thermal pyrolysis. Simultaneously, N-doping was also achieved from the protein in the algae for obtaining a high-performance carbocatalyst for peroxydisulfate (PDS) activation. The SDBC yielded large specific surface areas, nitrogen loading, and good conductivity, which demonstrated excellent oxidation efficiencies toward a wide array of aqueous microcontaminants. An in-depth mechanistic study was performed by integrating selective radical scavenging, solvent exchange (H2O to D2O), diverse organic probes, and electrochemical measurement, unveiling that SDBC/PDS did not rely on free radicals or singlet oxygen but a nonradical pathway. PDS intimately was bonded with a biochar (SDBC 900-acid, pyrolysis at 900 °C) to form a surface reactive complex that subsequently attacked an organic sulfamethoxazole (SMX) adsorbed on the biochar via an electron-transfer regime. During this process, the SDBC 900-acid played versatile roles in PDS activation, organic accumulation and mediating the electron shuttle from SMX to PDS. This nonradical system can maintain a superior oxidation efficiency in complicated water matrix and long-term stable operation. More importantly, the nonradical species in SDBC 900-acid/PDS system were capable of inactivating the bacteria (Escherichia coli) in wastewater. Therefore, the biochar based nonradical system can provide a mild and high-efficiency strategy for disinfection in waste and drinking water by green carbocatalysis. This study provides not only a value-added biochar catalyst for wastewater purification but also the first insight into the bacteria inactivation via nonradical oxidation.
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Affiliation(s)
- Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Yi-di Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.
| | - Ruixiang Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Chaofan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Yiming Ge
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Guoliang Cao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Ming Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Xiaoguang Duan
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA, 5005, Australia.
| | - Shaobin Wang
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA, 5005, Australia
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
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Kadyrzhanov KK, Egizbek K, Kozlovskiy AL, Zdorovets MV. Synthesis and Properties of Ferrite-Based Nanoparticles. NANOMATERIALS 2019; 9:nano9081079. [PMID: 31357606 PMCID: PMC6722941 DOI: 10.3390/nano9081079] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/16/2019] [Accepted: 07/22/2019] [Indexed: 01/04/2023]
Abstract
The work is dedicated to the study of the structural and optical characteristics, as well as the phase transformations, of ferrite nanoparticles of CeO2-Fe2O3. To characterize the results obtained, the methods of scanning and transmission microscopy, X-ray diffraction (XRD) spectroscopy, and Mössbauer spectroscopy were applied. It was found that the initial nanoparticles are polycrystalline structures based on cerium oxide with the presence of X-ray amorphous inclusions in the structure, which are characteristic of iron oxide. The study determined the dynamics of phase and structural transformations, as well as the appearance of a magnetic texture depending on the annealing temperature. According to the Mossbauer spectroscopy data, it has been established that a rise in the annealing temperature gives rise to an ordering of the magnetic properties and a decrease in the concentration of cationic and vacancy defects in the structure. During the life test of synthesized nanoparticles as cathode materials for lithium-ion batteries, the dependences of the cathode lifetime on the phase composition of nanoparticles were established. It is established that the appearance of a magnetic component in the structure result in a growth in the resource lifetime and the number of operating cycles. The results show the prospects of using these nanoparticles as the basis for lithium-ion batteries, and the simplicity of synthesis and the ability to control phase transformations opens up the possibility of scalable production of these nanoparticles for cathode materials.
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Affiliation(s)
- Kayrat K Kadyrzhanov
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
| | - Kamila Egizbek
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
- Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
| | - Artem L Kozlovskiy
- Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan.
- Laboratory of Additive Technologies, Kazakh-Russian International University, Aktobe 030006, Kazakhstan.
| | - Maxim V Zdorovets
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan.
- Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan.
- Department of Intelligent Information Technologies, Ural Federal University, Yekaterinburg 620075, Russia.
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42
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Du J, Ma S, Yan Y, Li K, Zhao F, Zhou J. Corn-silk-templated synthesis of TiO2 nanotube arrays with Ag3PO4 nanoparticles for efficient oxidation of organic pollutants and pathogenic bacteria under solar light. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.04.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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43
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Gastelo E, Montes de Oca J, Carpio E, Espinoza J, García P, Ponce S, Rodriguez J. Elimination of Escherichia coli in Water Using Cobalt Ferrite Nanoparticles: Laboratory and Pilot Plant Experiments. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2103. [PMID: 31261908 PMCID: PMC6651469 DOI: 10.3390/ma12132103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/17/2019] [Accepted: 06/18/2019] [Indexed: 11/29/2022]
Abstract
This paper focuses on the synthesis of cobalt ferrite nanoparticles by the sol-gel method and their photocatalytic activity to eliminate bacteria in aqueous media at two different scales: in a laboratory reactor and a solar pilot plant. Cobalt ferrite nanoparticles were prepared using Co(II) and Fe(II) salts as precursors and cetyltrimethyl ammonium bromide as a surfactant. The obtained nanoparticles were characterized by X-ray diffraction, scanning and transmission electron microscopy. Escherichia coli (E. coli) strain ATCC 22922 was used as model bacteria for contact biocidal analysis carried out by disk diffusion method and photocatalysis under an ultraviolet A (UV-A) lamp for laboratory analysis and solar radiation (radiation below 350 W/m2 in a typical cloudy day) for the pilot plant analysis. The results showed that cobalt ferrite nanoparticles have an average diameter of (36 ± 20) nm and the X-ray diffraction pattern shows a cubic spinel structure. Using the disk diffusion technique, it was obtained inhibition zones of (17 ± 2) mm diameter. Results confirm the photocatalytic elimination of E. coli in water samples with remaining bacteria below 1% of the initial concentration during the experiment time (30 min for laboratory tests and 1.5 h for pilot plant tests).
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Affiliation(s)
- Elmer Gastelo
- Center for the Development of Advanced Materials and Nanotechnology, Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac, Lima 15333, Peru
| | - Juan Montes de Oca
- Center for the Development of Advanced Materials and Nanotechnology, Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac, Lima 15333, Peru
| | - Edward Carpio
- Center for the Development of Advanced Materials and Nanotechnology, Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac, Lima 15333, Peru
| | - Juan Espinoza
- Center for the Development of Advanced Materials and Nanotechnology, Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac, Lima 15333, Peru
| | - Pilar García
- Center for the Development of Advanced Materials and Nanotechnology, Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac, Lima 15333, Peru
| | - Silvia Ponce
- Istituto de Investigación Científica (I.D.I.C), Universidad de Lima, Av. Javier Prado Este 4600, Surco, Lima 15023, Peru
| | - Juan Rodriguez
- Center for the Development of Advanced Materials and Nanotechnology, Universidad Nacional de Ingenieria, Av. Tupac Amaru 210, Rimac, Lima 15333, Peru.
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Jeyavani V, Pawar S, Dadwal A, Joy PA, Mukherjee SP. Size‐controlled Cobalt Ferrite Nanocrystals: Magnetically separable Reusable Nanocatalysts for Selective Oxidation of Styrene. ChemistrySelect 2019. [DOI: 10.1002/slct.201900714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Vijayakrishnan Jeyavani
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road, Pashan Pune 411008 India
| | - Sayali Pawar
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road, Pashan Pune 411008 India
| | - Arun Dadwal
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road, Pashan Pune 411008 India
| | - Pattayil Alias Joy
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road, Pashan Pune 411008 India
| | - Shatabdi Porel Mukherjee
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Dr. Homi Bhabha Road, Pashan Pune 411008 India
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45
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Teng Z, Yang N, Lv H, Wang S, Hu M, Wang C, Wang D, Wang G. Edge-Functionalized g-C3N4 Nanosheets as a Highly Efficient Metal-free Photocatalyst for Safe Drinking Water. Chem 2019. [DOI: 10.1016/j.chempr.2018.12.009] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Cheng R, Kang M, Shen ZP, Shi L, Zheng X. Visible-light-driven photocatalytic inactivation of bacteriophage f2 by Cu-TiO 2 nanofibers in the presence of humic acid. J Environ Sci (China) 2019; 77:383-391. [PMID: 30573103 DOI: 10.1016/j.jes.2018.09.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 09/11/2018] [Accepted: 09/11/2018] [Indexed: 05/24/2023]
Abstract
Pathogenic viruses in drinking water are great threats to public health. Visible-light-driven photocatalysis is a promising technology for virus inactivation. However, the existing photocatalytic antiviral research studies have mostly been carried out in single-component systems, neglecting the effect of natural organic matter, which exists widely in actual water bodies. In this paper, electrospun Cu-TiO2 nanofibers were prepared as photocatalysts, and their photocatalytic antiviral performance in the presence of humic acid (HA) was comprehensively studied for the first time. The properties of the reaction mixture were measured during the reaction. In addition, the safety, reliability and stability of photocatalytic disinfection in the mixed system were evaluated. The results showed that the virus removal efficiency decreased with the increase of the HA concentration. The type of reaction solution, such as PBS buffer solution or water, did not affect the removal efficiency noticeably. Under acidic conditions, the electrostatic forces between photocatalysts and viruses were strengthened, leading to higher virus removal efficiency. As the reaction time went on, the pH value in the solution increased first and then tended to be stable, the conductivity remained stable, and the dissolved oxygen increased first and then decreased. The safety test showed that the concentration of Cu ions released into the solution was lower than specified by the international standards. No photoreactivation was observed, and the addition of HA significantly reduced the reutilization efficiency of the photocatalysts.
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Affiliation(s)
- Rong Cheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Mi Kang
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Zhi-Peng Shen
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Lei Shi
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Xiang Zheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China.
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47
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He J, Zeng X, Lan S, Lo IMC. Reusable magnetic Ag/Fe, N-TiO 2/Fe 3O 4@SiO 2 composite for simultaneous photocatalytic disinfection of E. coli and degradation of bisphenol A in sewage under visible light. CHEMOSPHERE 2019; 217:869-878. [PMID: 30458422 DOI: 10.1016/j.chemosphere.2018.11.072] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 11/08/2018] [Accepted: 11/11/2018] [Indexed: 05/10/2023]
Abstract
A visible-light-driven and magnetic photocatalyst Ag/Fe,N-TiO2/Fe3O4@SiO2 (AgFeNTFS) was synthesized through a multi-step method. AgFeNTFS was tested for the photocatalytic disinfection of Escherichia coli (E. coli) and degradation of bisphenol A (BPA) under visible light irradiation, separately and simultaneously. The results showed that a 6.3-log reduction in cell density of E. coli was achieved and BPA (2 mg/L) was completely removed by AgFeNTFS in the separated photocatalytic processes within 120 min. In the simultaneous process, the photocatalytic disinfection of E. coli was not influenced in the presence of BPA, but the efficiency of BPA degradation was dropped by 10%. This was likely due to the competition for the same dominant reactive species of O2- and H2O2 between E. coli and BPA in the simultaneous process, as evidenced by the scavenger study and the interactions between the pollutants and AgFeNTFS. Moreover, the simultaneous photocatalytic activity of E. coli disinfection and BPA degradation by AgFeNTFS was investigated in the sewage obtained from a local wastewater treatment plant. The photocatalysis treated sewage could meet with the local disinfection discharge standard with a 3-log reduction of E. coli after 90 min, and a complete removal of BPA was achieved simultaneously after 360 min. Moreover, AgFeNTFS showed high magnetic separation efficiency and had a good reusability over three cycles for the simultaneous photocatalytic disinfection and degradation of BPA in both synthetic water and sewage. This study provides insights on the application of a reusable magnetic photocatalyst for simultaneous disinfection and degradation of BPA in sewage.
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Affiliation(s)
- Juhua He
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Xiangkang Zeng
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Shenyu Lan
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong, China.
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Duan Z, Deng L, Shi Z, Zhang H, Zeng H, Crittenden J. In situ growth of Ag-SnO2 quantum dots on silver phosphate for photocatalytic degradation of carbamazepine: Performance, mechanism and intermediates toxicity assessment. J Colloid Interface Sci 2019; 534:270-278. [DOI: 10.1016/j.jcis.2018.09.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 01/19/2023]
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