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Xue Y, Zhang L, Liu F, Kong L, Ma D, Han Y. Fluoride releasing photothermal responsive TiO 2 matrices for antibiosis, biosealing and bone regeneration. J Control Release 2023; 363:657-669. [PMID: 37832724 DOI: 10.1016/j.jconrel.2023.10.016] [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: 04/10/2023] [Revised: 09/29/2023] [Accepted: 10/08/2023] [Indexed: 10/15/2023]
Abstract
Peri-implantitis induced by infection leads to gingival recession, alveolar resorption and eventual dental implant failure. So, antibiosis and biosealing of abutments as well as osseointegration of roots need to be projected seriously during the whole service lifespan of dental implants. In this work, a multipurpose photothermal therapy strategy based on Si/P/F doped TiO2 matrix is proposed to address the above issues. This TiO2 matrix not only has outstanding photothermal response, but also triggers the release of F ions under near-infrared (NIR) light irradiation. Local hyperthermia assisted with the released F ions reduces adenosine triphosphate (ATP) synthesis of staphylococcus aureus (S. aureus), increases bacterial membrane permeability, and induces abundant of reactive oxygen species, resulting in the oxidation of cellular components and eventual death of bacteria. Furthermore, the synergic action of mild photothermal stimulation and Si/P/F ions of TiO2 matrix up-regulates gingival epithelial cells behavior (e.g., hemidesmosome formation) and osteoblasts response in vitro. In an infected model, this TiO2 matrix obviously eliminates bacteria, reduces inflammatory response, improves epithelial sealing and osseointegration, and reduces alveolar resorption by regulating NIR irradiation.
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Affiliation(s)
- Yang Xue
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Lan Zhang
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Fuwei Liu
- Fourth Military Medical University, Xi'an 710038, China
| | - Liang Kong
- Fourth Military Medical University, Xi'an 710038, China
| | - Dayan Ma
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yong Han
- State-key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China; Department of Orthopaedics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China.
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2
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Khan S, Khan JA, Shah NS, Sayed M, Ateeq M, Ansar S, Boczkaj G, Farooq U. Determination of lindane in surface water samples and its degradation by hydrogen peroxide and persulfate assisted TiO 2-based photocatalysis. RSC Adv 2023; 13:20430-20442. [PMID: 37435380 PMCID: PMC10331374 DOI: 10.1039/d3ra03610c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 06/30/2023] [Indexed: 07/13/2023] Open
Abstract
Organochlorine pesticides (OCPs) have been used extensively as insecticides and herbicides. This study investigates the occurrence of lindane in surface water from the Peshawar valley (i.e., Peshawar, Charsadda, Nowshera, Mardan and Swabi districts of Khyber Pakhtunkhwa, Pakistan). Out of 75 samples tested (i.e., 15 samples from each district), 13 samples (including 2 from Peshawar, 3 from Charsadda, 4 from Nowshera, 1 from Mardan, and 3 from Swabi) are found to be contaminated with lindane. Overall, the detection frequency is 17.3%. The maximum concentration of lindane is detected in a water sample from Nowshera and found to be 2.60 μg L-1. Furthermore, the degradation of lindane in the water sample from Nowshera, containing the maximum concentration, is investigated by simulated solar-light/TiO2 (solar/TiO2), solar/H2O2/TiO2 and solar/persulfate/TiO2 photocatalysis. The degradation of lindane by solar/TiO2 photocatalysis is 25.77% after 10 h of irradiation. The efficiency of the solar/TiO2 process is significantly increased in the presence of 500 μM H2O2 and 500 μM persulfate (PS) (separately), represented by 93.85 and 100.00% lindane removal, respectively. The degradation efficiency of lindane is lower in natural water samples as compared to Milli-Q water, attributed to water matrix effect. Moreover, the identification of degradation products (DPs) shows that lindane follows similar degradation pathways in natural water samples as the one in Milli-Q water. The results show that the occurrence of lindane in surface waters of Peshawar valley is a matter of great concern for human beings and the environment. Interestingly, H2O2 and PS assisted solar/TiO2 photocatalysis is an effective method for the removal of lindane from natural water.
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Affiliation(s)
- Sanaullah Khan
- Departmen of Chemistry, Women University Swabi 23430 Pakistan
| | - Javed Ali Khan
- Department of Chemistry, Abdul Wali Khan University Mardan Mardan 23200 Pakistan +92-937-542189 +92-937-929122
| | - Noor S Shah
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus 61100 Pakistan
| | - Murtaza Sayed
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar Peshawar 25120 Pakistan
| | - Muhammad Ateeq
- Department of Chemistry, Abdul Wali Khan University Mardan Mardan 23200 Pakistan +92-937-542189 +92-937-929122
| | - Sabah Ansar
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University P.O. Box 10219 Riyadh 11433 Saudi Arabia
| | - Grzegorz Boczkaj
- Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology G. Narutowicza St. 11/12 80-233 Gdansk Poland
- EkoTech Center, Gdansk University of Technology G. Narutowicza St. 11/12 80-233 Gdansk Poland
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Abbottabad-Campus 22060 Abbottabad Pakistan
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
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3
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Facile Preparation and Characterization of Silica Nanoparticles from South Africa Fly Ash Using a Sol–Gel Hydrothermal Method. Processes (Basel) 2022. [DOI: 10.3390/pr10112440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Silica nanoparticles (SNPs) consist of several applications which include lightweight aggregates, energy storage, and drug delivery. Nevertheless, the silica reagents used in SNP synthesis are both costly and hazardous. As a result, it is critical to look for other sources of silica. For this research, a simple sol–gel hydrothermal approach is used to make SNPs from South African fly ash (SAFA). SAFA is classified as fly ash class F according to X-ray fluorescence (XRF) analysis. The wide-angle X-ray diffraction (XRD) pattern reveals the structural composition of SAFA and the amorphous phase of extracted SNPs, while Fourier transform infrared (FTIR) examination reveals the presence of silanol and siloxane groups. Basic SNPs were generally spherical with diameters of about 60 nm, according to scanning electron microscopy (SEM) and transition electron microscope (TEM) studies. The presence of SiO2 is confirmed by energy-dispersive X-ray spectroscopy (EDX) spectrum analysis. Particle size assessment indicates particle sizes ranging from 48 nm to 87 nm in diameter, with a mean diameter of 67 nm. The application of SNPs in wastewater treatment demonstrated that they can be used to remove Cd2+ from an aqueous solution. This research offers new ideas for using South African fly ash in SNP manufacturing.
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Wang G, Li Y, Dai J, Deng N. Highly efficient photocatalytic oxidation of antibiotic ciprofloxacin using TiO 2@g-C 3N 4@biochar composite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:48522-48538. [PMID: 35190993 DOI: 10.1007/s11356-022-19269-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 02/13/2022] [Indexed: 06/14/2023]
Abstract
In this present study, a novel indirect Z-scheme TiO2@g-C3N4@biochar (TiO2@g-C3N4@BC) composite photocatalyst was successfully fabricated and characterized with SEM, TEM, EDS, XRD, FTIR, PL, XPS, and UV-vis DRS. The photocatalytic degradation behavior of ciprofloxacin (CIP) on the TiO2@g-C3N4@BC was evaluated under UV-vis and visible light irradiation, and the possible reaction mechanism of photocatalytic oxidation of CIP on the TiO2@g-C3N4@BC was explained. The TiO2@g-C3N4@BC composite photocatalyst exhibited stronger photocatalytic oxidation activity for CIP in comparison with TiO2, g-C3N4, TiO2@BC, and TiO2@g-C3N4. After 60 min of UV-vis and visible light irradiation, the photocatalytic removal efficiency of CIP by TiO2@g-C3N4@BC was 99.3 and 89.2%, respectively. The photocatalytic removal performance of CIP was affected by the initial concentration of CIP, catalyst dosage, and pH value. The composite photocatalyst presented excellent stability and reusability after five cycles. An indirect Z-scheme principle of the CIP photocatalytic oxidation reaction on TiO2@g-C3N4@BC was clearly proposed, and the whole process of photocatalytic degradation was the results of the interaction between CIP and reactive active species (·O2-, h+, and ·OH), of which ·O2- is the main active substance. Four CIP degradation pathways were proposed. This work may provide an effective strategy to remove antibiotics in wastewater.
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Affiliation(s)
- Guanghui Wang
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China.
| | - Yingjie Li
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
| | - Jialing Dai
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, 330013, China
| | - Nansheng Deng
- School of Resources and Environmental Science, Wuhan University, Wuhan, 430079, China
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5
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Yang L, Jia Y, Peng Y, Zhou P, Yu D, Zhao C, He J, Zhan C, Lai B. Visible-light induced activation of persulfate by self-assembled EHPDI/TiO 2 photocatalyst toward efficient degradation of carbamazepine. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 783:146996. [PMID: 33865137 DOI: 10.1016/j.scitotenv.2021.146996] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/28/2021] [Accepted: 04/03/2021] [Indexed: 06/12/2023]
Abstract
Removal of pharmaceutical and personal care products from wastewater is very important in water treatment process. Combining photocatalysis with persulfate (PS) could be a good solvent for this problem. Novel perylene diimide derivative (EHPDI) was designed and synthesized. Furthermore, self-assembled EHPDI/TiO2 composite photocatalyst (EPT) was prepared and applied in activating persulfate (PS) under visible light to enhance the photodegradation of pollutants. The presence of the alkyl side chain 2-ethylhexyl optimizes the self-assembly process, enabling the composite material to achieve high performance under low EHPDI loading. Various methods were used to detect the physical and chemical characteristics of EPT. Carbamazepine (CBZ) was chosen to be the model pollutant to study the removal efficiency of EPT/PS system under visible light. Within 30 min, 5.0 mg/L CBZ could be almost completely degraded, and the removal ratio of TOC was 75.2% within 60 min. The SO4-, OH, O2-, 1O2, and h+ were proved to be involved in the removal of CBZ by EPR and quenching experiments. Then, other typical pollutants were degraded by this EPT/PS system, demonstrating this system is suitable for degrading different pollutants. Besides, the degradation paths of CBZ were proposed by HPLC/MS. Finally, the EPT showed excellent recyclability and stability.
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Affiliation(s)
- LiWei Yang
- School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an 710061, China
| | - YanYan Jia
- School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an 710061, China
| | - YaQi Peng
- School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an 710061, China
| | - Peng Zhou
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
| | - Dian Yu
- School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an 710061, China
| | - ChuanLiang Zhao
- School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an 710061, China
| | - JiaoJie He
- School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an 710061, China
| | - ChuanLang Zhan
- Key Laboratory of Excitonic Materials Chemistry and Devices (EMC&D), College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot 010022, China.
| | - Bo Lai
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China; Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China.
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6
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Ghobadifard M, Mohebbi S, Radovanovic PV. Selective oxidation of alcohols by using CoFe2O4/Ag2MoO4 as a visible-light-driven heterogeneous photocatalyst. NEW J CHEM 2020. [DOI: 10.1039/c9nj05633e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using a CoFe2O4/Ag2MoO4 heterostructure as a novel, stable, inexpensive, and reusable photocatalyst with high-performance for the oxidation of alcohols.
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Affiliation(s)
- Mahdieh Ghobadifard
- Department of Chemistry
- University of Kurdistan
- Iran
- Department of Chemistry
- University of Waterloo
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7
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Liu M, Zhu X, Ma T, Zhang C, Chen X, Zhang X, Huang T, Li W, Yu A. Ultradispersed titanium dioxide nanoparticles embedded in a three-dimensional graphene aerogel for high performance sulfur cathodes. RSC Adv 2019; 9:6568-6575. [PMID: 35518503 PMCID: PMC9060913 DOI: 10.1039/c8ra10397f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/10/2019] [Indexed: 11/21/2022] Open
Abstract
Lithium-sulfur (Li-S) batteries are regarded as one of the most promising energy storage technologies, however, their practical application is greatly limited by a series of sulfur cathode challenges such as the notorious "shuttle effect", low conductivity and large volume change. Here, we develop a facile hydrothermal method for the large scale synthesis of sulfur hosts consisting of three-dimensional graphene aerogel with tiny TiO2 nanoparticles (5-10 nm) uniformly dispersed on the graphene sheet (GA-TiO2). The obtained GA-TiO2 composites have a high surface area of ∼360 m2 g-1 and a hierarchical porous structure, which facilitates the encapsulation of sulfur in the carbon matrix. The resultant GA-TiO2/S composites exhibit a high initial discharge capacity of 810 mA h g-1 with an ultralow capacity fading of 0.054% per cycle over 700 cycles at 2C, and a high rate (5C) performance (396 mA h g-1). Such architecture design paves a new way to synthesize well-defined sulfur hosts to tackle the challenges for high performance Li-S batteries.
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Affiliation(s)
- Mengmeng Liu
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125
| | - Xiaohang Zhu
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125
| | - Tianye Ma
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125
| | - Congcong Zhang
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125
| | - Xiang Chen
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125
| | - Xiuhui Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University Shanghai 200438 China +86-21-51630324
| | - Tao Huang
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125
| | - Wei Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University Shanghai 200438 China +86-21-51630324
| | - Aishui Yu
- Laboratory of Advanced Materials, Fudan University Shanghai 200438 China +86-21-31249125.,Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University Shanghai 200438 China +86-21-51630324
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8
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Ji W, Shen T, Kong J, Rui Z, Tong Y. Synergistic Performance between Visible-Light Photocatalysis and Thermocatalysis for VOCs Oxidation over Robust Ag/F-Codoped SrTiO3. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02873] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weikang Ji
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Ting Shen
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Jiejing Kong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Zebao Rui
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
| | - Yexiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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9
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Matos J, Llano B, Montaña R, Poon PS, Hidalgo MC. Design of Ag/ and Pt/TiO 2-SiO 2 nanomaterials for the photocatalytic degradation of phenol under solar irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:18894-18913. [PMID: 29717427 DOI: 10.1007/s11356-018-2102-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
The design of hybrid mesoporous TiO2-SiO2 (TS1) materials decorated with Ag and Pt nanoparticles was performed. The photocatalytic degradation of phenol under artificial solar irradiation was studied and the activity and selectivity of the intermediate products were verified. TiO2-SiO2 was prepared by sol-gel method while Ag- and Pt-based photocatalysts (TS1-Ag and TS1-Pt) were prepared by photodeposition of the noble metals on TS1. Two series of photocatalysts were prepared varying Ag and Pt contents (0.5 and 1.0 wt%). An increase in the photocatalytic activity up to two and five times higher than TS1 was found on TS1-Ag-1.0 and TS1-Pt-1.0, respectively. Changes in the intermediate products were detected on Ag- and Pt-based photocatalysts with an increase in the catechol formation up to 3.3 and 6.6 times higher than that observed on TS1, respectively. A two-parallel reaction mechanism for the hydroquinone and catechol formation is proposed. A linear correlation between the photocatalytic activity and the surface concentration of noble metals was found indicating that the electron affinity of noble metals is the driven force for both the increase in the photoactivity and for the remarkable changes in the selectivity of products.
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Affiliation(s)
- Juan Matos
- Hybrid and Carbon Materials Group, Bioenergy Department, Technological Development Unit (UDT), University of Concepcion, Av. Cordillera, 2634, Parque Industrial Coronel, Coronel, Bio Bio, Chile.
| | - Biviana Llano
- Grupo Procesos Químicos Industriales, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
| | - Ricmary Montaña
- Hybrid and Carbon Materials Group, Bioenergy Department, Technological Development Unit (UDT), University of Concepcion, Av. Cordillera, 2634, Parque Industrial Coronel, Coronel, Bio Bio, Chile
| | - Po S Poon
- Hybrid and Carbon Materials Group, Bioenergy Department, Technological Development Unit (UDT), University of Concepcion, Av. Cordillera, 2634, Parque Industrial Coronel, Coronel, Bio Bio, Chile
| | - Maria C Hidalgo
- Instituto de Ciencia de Materiales de Sevilla (ICMS), Centro Mixto CSIC-Universidad de Sevilla, C/Américo Vespucio 49, 41092, Sevilla, Spain
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Wang X, Liao D, Yu H, Yu J. Highly efficient BiVO4 single-crystal photocatalyst with selective Ag2O-Ag modification: orientation transport, rapid interfacial transfer and catalytic reaction. Dalton Trans 2018; 47:6370-6377. [DOI: 10.1039/c8dt00780b] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly efficient Ag2O-Ag/BiVO4 single-crystal photocatalyst: (1) orientation transport, (2) rapid interfacial transfer and (3) catalytic reaction.
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Affiliation(s)
- Xuefei Wang
- Department of Chemistry
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
| | - Dan Liao
- Department of Chemistry
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
| | - Huogen Yu
- Department of Chemistry
- School of Chemistry
- Chemical Engineering and Life Sciences
- Wuhan University of Technology
- Wuhan 430070
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- PR China
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11
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Du W, Xu Q, Jin D, Wang X, Shu Y, Kong L, Hu X. Visible-light-induced photo-Fenton process for the facile degradation of metronidazole by Fe/Si codoped TiO2. RSC Adv 2018; 8:40022-40034. [PMID: 35558215 PMCID: PMC9091309 DOI: 10.1039/c8ra08114j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 11/19/2018] [Indexed: 11/21/2022] Open
Abstract
This work investigated the feasibility and efficiency of a heterogeneous photo-Fenton catalyst, Fe/Si codoped TiO2, for the degradation of metronidazole (MNZ) under visible light irradiation. The Fe/Si codoped TiO2 was prepared via a facile and simple sol–gel solvothermal process followed by annealing at 480 °C for 4 hours. High resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) measurements revealed that the photo-Fenton process did not change the structure, textural and surface morphologies of this catalyst. Elemental mapping results indicated the good dispersion of Fe and Si ions in TiO2. Nitrogen adsorption and desorption measurements indicated that Si doping increased the surface area of the catalysts. The Fe and Si doping narrowed the band gap of TiO2. They also facilitated the transfer of photo-generated electrons from TiO2 to Fe(iii). Under visible light irradiation and the optimum operating conditions, MNZ could be completely degraded in 50 min by this catalyst within a wide pH range. Hydroxyl radicals and holes were verified to be responsible for degrading MNZ. The leaching of iron ions was less than 0.047 ppm even after illuminating the catalyst for 6 hours, indicating the good stability of the Fe/Si codoped TiO2. The as-prepared catalysts with excellent catalytic activity, and remarkable reusability and stability could provide a new insight into the preparation of photocatalysts and have wide applications for antibiotics removal. This work investigated the feasibility and efficiency of a heterogeneous photo-Fenton catalyst, Fe/Si codoped TiO2, for the degradation of metronidazole (MNZ) under visible light irradiation.![]()
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Affiliation(s)
- Wei Du
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Qin Xu
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Dangqin Jin
- Department of Chemical Engineering
- Yangzhou Polytechnic Institute
- Yangzhou 225127
- China
| | - Xiaoyu Wang
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Yun Shu
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Liming Kong
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
| | - Xiaoya Hu
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- China
- Guangling College
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12
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Construction of Ag 3 PO 4 /Ag 2 MoO 4 Z-scheme heterogeneous photocatalyst for the remediation of organic pollutants. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(16)62570-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Photocatalytic degradation of toluene in a staged fluidized bed reactor using TiO2/silica gel. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0248-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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