1
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Lin Z, Xiao Z, Liu Y, Wang Y, Chen S, Zhang J, Chen Y, Zhang X, Zhang G, Li D, Lv W, Chen P, Liu G. Insights into copper(I) phenylacetylide with in-situ transformation of oxygen and enhanced visible-light response for water decontamination: Cu-O bond promotes exciton dissociation and charge transfer. J Colloid Interface Sci 2024; 671:1-14. [PMID: 38788420 DOI: 10.1016/j.jcis.2024.05.159] [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: 03/18/2024] [Revised: 05/14/2024] [Accepted: 05/21/2024] [Indexed: 05/26/2024]
Abstract
The widespread contamination of hexavalent chromium (Cr(VI)), pharmaceuticals and personal care products (PPCPs), and dyes is a growing concern. necessitating the development of convenient and effective technologies for their removal. Copper(I) phenylacetylide (PhC2Cu) has emerged as a promising photocatalyst for environmental remediation. In this study, we introduced a functional Cu-O bond into PhC2Cu (referred to as OrPhC2Cu) by creatively converting the adsorbed oxygen on the surface of PhC2Cu into a Cu-O bond to enhance the efficiency of Cr(VI) photoreduction, PPCPs photodegradation, and dyes photodegradation through a facile vacuum activating method. The incorporation of the Cu-O bond optimized the electron structure of OrPhC2Cu, facilitating exciton dissociation and charge transfer. The exciton dissociation behavior and charge transfer mechanism were systematically investigated for the first time in the OrPhC2Cu system by photoelectrochemical tests, fluorescence and phosphorescence (PH) techniques, and density functional theory (DFT) calculations. Remarkably, the enhanced visible-light response of OrPhC2Cu improved photon utilization and significantly promoted the generation of reactive species (RSs), leading to the highly efficient Cr(VI) photoreduction (98.52% within 25 min) and sulfamethazine photodegradation (94.65% within 60 min), with 3.91 and 5.23 times higher activity compared to PhC2Cu. Additionally, the photocatalytic efficiency of OrPhC2Cu in degrading anionic dyes surpassed that of cationic dyes. The performance of the OrPhC2Cu system in treating electroplating effluent or natural water bodies suggests its potential for practical applications.
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Affiliation(s)
- Zili Lin
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhenjun Xiao
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Yang Liu
- School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
| | - Yishun Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Shuyue Chen
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Jinfan Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Yingyi Chen
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiaoyu Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Ge Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Daguang Li
- School of Light Chemical Industry and Materials, Shunde Polytechnic, Foshan 528333, China
| | - Wenying Lv
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Ping Chen
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Guoguang Liu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
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Wang Q, Zhang C, Huo R, Zheng S, Liu A, Hui Y, Ji Y, Jin Q, Zhang Z, Tu Y, Zhu H, Du H. Novel Ag@NH 2-UiO-66(Zr) photocatalyst with controllable charge transfer pathways for efficient Cr(VI) remediation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 367:122046. [PMID: 39094410 DOI: 10.1016/j.jenvman.2024.122046] [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: 04/01/2024] [Revised: 07/24/2024] [Accepted: 07/28/2024] [Indexed: 08/04/2024]
Abstract
Rational fabrication of core-shell photocatalysts to hamper the charge recombination is extraordinarily essential to enhance photocatalytic activity. In this work, core-shell Ag@NH2-UiO-66 (Ag@NU) Schottky heterojunctions with low Ag content (1 wt%) were constructed by a two-step solvothermal method and adopted for Cr(VI) reduction under LED light. Typically, the one with the Ag: NH2-UiO-66 mass ratio (1 : 100) led to 100% Cr(VI) removal within 1 h, superior to bare NH2-UiO-66 and Ag/NH2-UiO-66 (Ag was directly decorated on NH2-UiO-66 surface). The enhanced photocatalytic activity was related to the migration of the electrons on the CB of NH2-UiO-66 to Ag NPs through a Schottky barrier, and thus the undesired charge carriers recombination was avoided. This result was also evidenced by Density functional theory (DFT) calculations. The computational simulations indicate that the introduction of Ag effectively narrowed the band gap of NH2-UiO-66, facilitating the transfer of photo-generated electrons, expanding the light absorption area, and significantly enhancing photocatalytic efficiency. Most importantly, such a core-shell structure can inhibit the formation of •O2-, letting the direct Cr(VI) reduction by photo-excited e-. In addition, this structure can also protect Ag from being oxidized by O2. Ten cyclic tests evidenced the Ag@NU had excellent chemical and structural stability. This research offers a novel strategy for regulating the Cr(VI) reduction by establishing core-shell photocatalytic materials.
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Affiliation(s)
- Qi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Chao Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Rubin Huo
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu, 225009, China
| | - Shuzhen Zheng
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Aoxiang Liu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Yuxin Hui
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Yun Ji
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Qin Jin
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu, 225009, China
| | - Zhe Zhang
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu, 225009, China
| | - Yusong Tu
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu, 225009, China
| | - Huayue Zhu
- Insititute of Environmental Engineering Technology, Taizhou University, Taizhou, 318000, China
| | - Hao Du
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China.
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3
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Yu C, Zhou Y, Zhou Y, Liu Z, Liang M, Huang L, Zhao J. Copper Phenylacetylide and TiO 2 Modification for an Efficient Visible-Light-Driven Oxidative Coupling of Amines. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38684661 DOI: 10.1021/acsami.4c00894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The selective oxidation of amines to imines under mild conditions has attracted much attention. Our study reveals that copper phenylacetylide (PhC2Cu) could serve as an efficient photocatalyst for imine synthesis under visible-light irradiation (>400 nm). Utilizing benzylamine as a model reactant, PhC2Cu achieves an imine yield of 50.4%, which is 5 times higher than that of P25 under the same conditions and comparable to the yield obtained by the 3 wt % Au/P25 photocatalyst (55.4%). Further loading 3.9 nm TiO2 onto PhC2Cu through tetrabutyl titanate hydrolysis increases the imine yield to 84.7%, with a Ti:Cu atomic ratio of 3.65%. Control experiments, photoluminescence (PL) spectra, optical pump terahertz probe (OPTP) spectra, and electron spin resonance (ESR) tests confirm that the optimized TiO2 modification promotes the separation of excited carriers and electron transfer in PhC2Cu and facilitates the activation of surface oxygen, thereby enhancing the formation of superoxide radicals, a key active oxygen species in the reaction system. This work presents a promising strategy for efficient imine synthesis via amine coupling and expands the application field of PhC2Cu-based photocatalysts.
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Affiliation(s)
- Chunzheng Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Yiwei Zhou
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Ye Zhou
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zhenkun Liu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Mao Liang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Lei Huang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Jian Zhao
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, P. R. China
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Zhang J, Lin Z, Yu Z, Zhang Y, Liang D, Chen Y, Chen Y, Chen P, Liu H, Lv W, Liu G. Simplified synthesis of direct Z-scheme Bi 2WO 6/PhC 2Cu heterojunction that shows enhanced photocatalytic degradation of 2,4,6-TCP: Kinetic study and mechanistic insights. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132065. [PMID: 37467607 DOI: 10.1016/j.jhazmat.2023.132065] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/03/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023]
Abstract
For this work, we employed n-type Bi2WO6 and p-type PhC2Cu to formulate a direct Z-scheme Bi2WO6/PhC2Cu (PCBW) photocatalyst via simplified ultrasonic stirring technique. An optimal 0.6PCBW composite exhibited the capacity to rapidly photodegrade 2,4,6-TCP (98.6% in 120 min) under low-power blue LED light, which was 8.53 times and 12.53 times faster than for pristine PhC2Cu and Bi2WO6, respectively. Moreover, electron spin resonance (ESR), time-resolved PL spectra, and quantitative ROS tests indicated that the PCBW enhanced the separation capacity of photocarriers. It also more readily associated with dissolved oxygen in water to generate reactive oxygen species (ROS). Among them, the ability of PCBW to produce ·O2- in one hour was 12.07 times faster than for pure PhC2Cu. In addition, the H2O2 formation rate and apparent quantum efficiency of PCBW are 10.73 times that of PhC2Cu, which indicates that PCBW not only has excellent photocatalytic performance, but also has outstanding ROS production ability. Furthermore, Ag photodeposition, in situ X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations were utilized to determine the photogenerated electron migration paths in the PCBW, which systematically confirmed that Z-scheme heterojunction were successfully formed. Finally, based on the intermediate products, three potential 2,4,6-TCP degradation pathways were proposed.
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Affiliation(s)
- Jinfan Zhang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Zili Lin
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Zongshun Yu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yudan Zhang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Danluo Liang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yingyi Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yu Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Ping Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Haijin Liu
- Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, School of Environment, Henan Normal University, Xinxiang 453007, China
| | - Wenying Lv
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Guoguang Liu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
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Liu G, Lin Y, Li S, Shi C, Zhang D, Chen L. Degradation of ciprofloxacin by persulfate activated by Fe(III)-doped BiOCl composite photocatalyst. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:87830-87850. [PMID: 37434054 DOI: 10.1007/s11356-023-28490-0] [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: 07/05/2022] [Accepted: 06/24/2023] [Indexed: 07/13/2023]
Abstract
Fe-BOC-X photocatalyst was successfully prepared by solvothermal method. The photocatalytic activity of Fe-BOC-X was determined by ciprofloxacin (CIP), a typical fluoroquinolone antibiotic. Under sunlight irradiation, all Fe-BOC-X showed better CIP removal performance than original BiOCl. In comparison, the photocatalyst with iron content of 50 wt% (Fe-BOC-3) has excellent structural stability and the best adsorption photodegradation efficiency. The removal rate of CIP (10 mg/L) by Fe-BOC-3 (0.6 g/L) reached 81.4% within 90 min. At the same time, the effects of photocatalyst dosage, pH, persulfate, persulfate concentration, and combinations of different systems (PS, Fe-BOC-3, Vis/PS, Vis/Fe-BOC-3, Fe-BOC-3/PS, and Vis/Fe-BOC-3/PS) on the reaction were systematically discussed. In reactive species trapping experiments, electron spin resonance (ESR) signals revealed that the photogenerated holes (h+), hydroxyl radical (•OH), sulfate radical (•SO4-), and superoxide radical (•O2-) played an important role in CIP degradation; hydroxyl radicals (•OH) and sulfate radicals (•SO4-) play a major role. Various characterization methods have demonstrated that Fe-BOC-X has larger specific surface area and pore volume than original BiOCl. UV-vis DRS indicate that Fe-BOC-X has wider visible light absorption and faster photocarrier transfer and provides abundant surface oxygen absorption sites for effective molecular oxygen activation. Accordingly, a large number of active species were produced and participated in the photocatalytic process, thus effectively promoting the degradation of ciprofloxacin. Based on HPLC-MS analysis, two possible decomposition pathways of CIP were finally proposed. The main degradation pathways of CIP are mainly due to the high electron density of piperazine ring in CIP molecule, which is mainly attacked by various free radicals. The main reactions include piperazine ring opening, decarbonylation, decarboxylation, and fluorine substitution. This study can better open up a new way for the design of visible light driven photocatalyst and provide more ideas for the removal of CIP in water environment.
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Affiliation(s)
- Gen Liu
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, 130117, Jilin, China
| | - Yingzi Lin
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, China.
- School of Municipal & Environmental Engineering, Jilin Jianzhu University, Changchun, 130118, China.
| | - Siwen Li
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, 130117, Jilin, China
| | - Chunyan Shi
- The University of Kitakyushu, 1-1 Hibikino, Wakamatsuku, Kitakyushu, Fukuoka, Japan
| | - Dongyan Zhang
- School of Municipal & Environmental Engineering, Jilin Jianzhu University, Changchun, 130118, China
| | - Lei Chen
- School of Municipal & Environmental Engineering, Jilin Jianzhu University, Changchun, 130118, China
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6
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Guo Y, Dai Y, Wang Y, Zuo G, Long T, Li S, Li H, Sun C, Zhao W. Boosted visible-light-driven degradation over stable ternary heterojunction as a plasmonic photocatalyst: Mechanism exploration, pathway and toxicity evaluation. J Colloid Interface Sci 2023; 641:758-781. [PMID: 36965346 DOI: 10.1016/j.jcis.2023.03.064] [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: 12/27/2022] [Revised: 02/20/2023] [Accepted: 03/09/2023] [Indexed: 03/16/2023]
Abstract
The incorporation of plasmonic metals into semiconductors forming heterojunction photocatalysts is a promising route to enhance the photocatalytic performance in visible light. In this work, we reported the visible-light-driven one-dimensional (1D) nanostick silver/silver sulfide (Ag/Ag2S) photocatalyst combining with two-dimensional (2D) nanosheet reduced graphene oxide intersected by hollow structure (h-RGO) was prepared via a feasible approach at room temperature. The density of Ag depositing on the surface of Ag2S was easily tuned by the concentration of sodium borohydride and the silicon dioxide nanospheres were employed as templates in the preparation of h-RGO by the layer-by-layer (LBL) assembly. The ternary plasmonic Ag/Ag2S/h-RGO photocatalysts exhibited better photocatalytic performance for degradation of naphthalene (95.95%) and 1-naphthol (98.65%) under visible light than the pure Ag2S, composite Ag/Ag2S and composite Ag/Ag2S/RGO. Localized surface plasmon resonance of Ag, heterojunction formed between Ag/Ag2S and RGO and the unique characteristics of h-RGO, which included higher specific surface areas, more efficient reflections of light and more active sites than RGO for boosting separation efficiency of charge carriers, were all responsible for such enhancement. By combining the characterization results with various computations, the mechanism, potential degradation pathways and the toxicity of the generated intermediates for photodegradation were examined. In addition to offering profound insight into the expansion of effective plasmonic photocatalysts with novel structures, the current study is beneficial to ease the environmental crisis to a certain extent.
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Affiliation(s)
- Yang Guo
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210000, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China; Department of Plant, Soil and Microbial Sciences, Plant and Soil Science Building 1066 Bogue Street, Michigan State University, East Lansing, MI 48824, United States
| | - Yuxuan Dai
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Yuting Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Gancheng Zuo
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Tao Long
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210000, China
| | - Shijie Li
- Institute of Innovation & Application, Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang Province 316022, China
| | - Hui Li
- Department of Plant, Soil and Microbial Sciences, Plant and Soil Science Building 1066 Bogue Street, Michigan State University, East Lansing, MI 48824, United States
| | - Cheng Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
| | - Wei Zhao
- Department of Mechanical Engineering, University of Hong Kong, Pokfulam Road, Hong Kong; School of Materials Engineering, Changshu Institute of Technology, Changshu, China
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7
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In situ generation of hydroxyl radicals by B-doped TiO 2 for efficient photocatalytic degradation of acetaminophen in wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:46997-47011. [PMID: 36735135 DOI: 10.1007/s11356-023-25390-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 01/14/2023] [Indexed: 02/04/2023]
Abstract
Acetaminophen (AP) is a widely used antipyretic analgesic belonging to the class of PPCPs, which is difficult to be effectively degraded by traditional water treatment processes. However, photocatalytic technology may be an effective approach. Herein, B-doped TiO2 photocatalytic materials were synthesized by sol-gel method, calcinated at 600℃ for 2 h, investigated by XRD, TEM, XPS, and other characterization methods. The photocatalytic efficiency and factors affecting the photocatalytic activity were assessed by degradation of AP under 365 nm UV light. Compared with undoped TiO2, 4%B-TiO2 nanopowder has smaller grain size, higher porosity, and lower bandgap energy of 3.11 eV. Scavenging experiments and ESR results show that •OH is the principal active species. Hence, the degradation efficiency of AP is as high as 98.8% in 30 min when adopting 10-mg/L AP initial concentration and 1-g/L 4%B-TiO2 loading, owing to efficient •OH generated by B-TiO2.
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Zhang T, Zhang S, Wu C, Zuo H, Yan Q. Novel La 3+/Sm 3+ co-doped Bi 5O 7I with efficient visible-light photocatalytic activity for advanced treatment of wastewater: Internal mechanism, TC degradation pathway, and toxicity analysis. CHEMOSPHERE 2023; 313:137540. [PMID: 36521751 DOI: 10.1016/j.chemosphere.2022.137540] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 11/25/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Controlling semiconductor photocatalysts by doping rare-earth ions is an effective strategy to improve photocatalytic performance. Simple solvothermal and calcination methods were used to prepare La3+ and Sm3+ modified Bi5O7I nanomaterials. Some characterizations such as XRD, XPS, SEM, TEM, UV-vis, etc. were carried out to explore its structural composition and photoelectrochemical properties. The photocatalytic activity was investigated by simulating the degradation of TC and RhB under visible-light irradiation. The degradation results showed that the photocatalytic efficiency of 4S4L-Bi5O7I was the best among the samples with the 100% degradation rate of TC (Tetracycline hydrochloride) and 93% of RhB (Rhodamine B). The capture experiment and ESR test proved that the active substances that play a role in the photocatalytic degradation of pollutants were ·O2-, 1O2 and h+, and on this basis, the possible degradation mechanism was proposed. The final results showed that La/Sm co-doping expanded the light absorption range of Bi5O7I and improved the charge separation efficiency and the specific surface area. Besides, the surface defects were formed on the surface of Bi5O7I due to ion-doping, which could catch e- to promote the separation and transfer of carriers and improve the photocatalytic activity. LC-MS was used to analyze the possible degradation pathways of TC. And the toxicity of TC was also analyzed via T.E.S.T and Toxtree. The results showed comprehensive toxicity of TC was decreased by 4S4L-Bi5O7I so that the overall water pollution was reduced. This work can provide a reference for the subsequent development of bismuth-based photocatalysts.
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Affiliation(s)
- Tongtong Zhang
- School of Environment and Natural Resources, Renmin University of China, 59 Zhongguancun Street, Haidian District, Beijing, 100872, China
| | - Siyu Zhang
- College of Chemistry, Zhengzhou University, No. 100, Science Avenue, Zhengzhou City, Henan Province, 450001, China
| | - Chenyu Wu
- College of Chemistry, Zhengzhou University, No. 100, Science Avenue, Zhengzhou City, Henan Province, 450001, China
| | - Huiru Zuo
- College of Chemistry, Zhengzhou University, No. 100, Science Avenue, Zhengzhou City, Henan Province, 450001, China
| | - Qishe Yan
- College of Chemistry, Zhengzhou University, No. 100, Science Avenue, Zhengzhou City, Henan Province, 450001, China.
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9
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Shukla V, Panchal D, Prakash O, Mondal P, Hiwrale I, Dhodapkar RS, Pal S. Magnetically engineered sulfurized peat-based activated carbon for remediation of emerging pharmaceutical contaminants. BIORESOURCE TECHNOLOGY 2023; 369:128399. [PMID: 36503834 DOI: 10.1016/j.biortech.2022.128399] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/20/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Activated carbon derived from peat-based biomass was sulfurized and magnetized forming magnetically-engineered sulfurized peat-based activated carbon (MEPBAC) and used for adsorption of caffeine (CFN) and sulfamethoxazole (SMX) from aqueous media. Modification increased the surface area (724 m2/g) and introduced sulphur-groups and Fe-based nano-structures in MEPBAC. Sulphur-groups enhanced adsorption efficiency, whereas Fe-based nano-structures facilitated easy magnetic separation of MEPBAC after intended use leading to high reusability with consistent removal efficiency (∼95 %). Response surface methodology was employed for design of experiments and process optimization. The results revealed that the maximum removal (SMX 94 %; CFN 97 %) could be achieved at an adsorbent dose of 1.4 and 1.6 g/L, respectively (pH 11, 311 K). Adsorption kinetics was best explained by a pseudo-second-order kinetic model. Adsorption data of SMX was fitted better to Langmuir (linear) and Freundlich (non-linear) isotherms, whereas that of CFN was fitted well with Freundlich (linear) and Langmuir (non-linear) isotherms (R2 ≥ 0.99).
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Affiliation(s)
- Varun Shukla
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Deepak Panchal
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India
| | - Om Prakash
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India
| | - Prasenjit Mondal
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Isha Hiwrale
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rita S Dhodapkar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Environmental Biotechnology and Genomics Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur 440020, India
| | - Sukdeb Pal
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India.
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Plasmonic Ag modified Ag3VO4/AgPMo S-scheme heterojunction photocatalyst for boosted Cr(VI) reduction under visible light: Performance and mechanism. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122204] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Wu Y, Jin X, Liu H, Lv W, Liu G. Synergistic effects of boron nitride quantum dots and reduced ultrathin g-C3N4: dual-channel carrier transfer and band structure regulation boost the photodegradation of fluoroquinolone. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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12
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Lai H, Huang X, Zhou F, Song T, Yin S, Mao G, Long B, Ali A, Deng GJ. Construction of dual active sites on the CuAg plasmonic aerogel for simultaneously efficient photocatalytic CO2 reduction and H2 production. J Colloid Interface Sci 2022; 631:164-172. [DOI: 10.1016/j.jcis.2022.11.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 11/15/2022]
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13
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Zhao B, Xu H, Zhang K, Gao B, Wang Y, Wang Q, Zhang K, Huang Y, Li J. Visible-light-driven CQDs/TiO 2 photocatalytic simultaneous removal of Cr(VI) and organics: Cooperative reaction, kinetics and mechanism. CHEMOSPHERE 2022; 307:135897. [PMID: 35932916 DOI: 10.1016/j.chemosphere.2022.135897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/12/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
CQDs/TiO2 was synthesized with a coprecipitation method and characterized by XRD, SEM, TEM/HRTEM, BET, XPS, UV-Vis DRS and I-t curve technologies. UV-Vis DRS displayed that absorption spectrum of CQDs/TiO2 enlarged to visible light zone, suggesting that CQDs/TiO2 can be irradiated by visible light. I-t curve showed that photocurrent of CQDs/TiO2 was higher than that of bare TiO2, revealing that the doping of CQDs accelerated the transfer of photoelectrons and restrained the recombination of photoinduced carriers. Simultaneous removal of Cr(VI) and organics with CQDs/TiO2 photocatalytic reaction was investigated and factors were optimized, and almost all Cr(VI) and organics were removed under the optimum conditions. Experimental results displayed that there was a distinct cooperation removal effect between Cr(VI) and organics in CQDs/TiO2 photocatalytic reaction. XPS analysis proved that Cr(VI) was reduced to Cr(III) in situ on CQDs/TiO2 surface. There were e-, h+,·OH and ·O2- active species which were detected with DMPO in ESR test during CQDs/TiO2 photocatalytic reaction, and scavenger experiment proved that e- and h+ were the substantial reactants for Cr(VI) and organics, respectively. The pathway of photocatalytic simultaneous removal of Cr(VI) and organics underwent four steps: adsorption of Cr(VI) and organics on CQDs/TiO2 surface; production of photo electrons and holes in visible light; reduction of Cr(VI) and oxidation of organics; desorption of Cr(III) and intermediates. Photocatalytic reaction kinetics of Cr(VI) and organics were both confirmed to pseudo first-order reaction. Life span and small scale real application tests both demonstrated that CQDs/TiO2 had a potential application to wastewater containing Cr(VI) and organics.
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Affiliation(s)
- Baoxiu Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
| | - Hao Xu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Keliu Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Bo Gao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Yilin Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Qi Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Kaixin Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Yue Huang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Jincheng Li
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
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14
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Enesca A, Cazan C. Polymer Composite-Based Materials with Photocatalytic Applications in Wastewater Organic Pollutant Removal: A Mini Review. Polymers (Basel) 2022; 14:polym14163291. [PMID: 36015545 PMCID: PMC9415733 DOI: 10.3390/polym14163291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/01/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
The development of new technologies using nanomaterials has allowed scientists to design advanced processes with many applications in environmental protection, energy production and storage, and medicinal bio-mediated processes. Due to their significant potential applications in different branches of science, the development of new polymer composites represents a priority, especially for nano-technological processes. Interest in polymeric composites was outlined by the synthesis of a large number of nano- or mezzo-scale materials with targeted functional properties for polymer matrix hybridization. The present mini review explores some of the most representative and recent papers reporting the photocatalytic activity of polymer composites toward different organic compounds (dyes, pharmaceutically active molecules, phenol, etc.). The polymer composites were divided based on their composition and photocatalytic activity. TiO2- and ZnO-based polymeric composites have been described here in light of their photocatalytic activity toward different pollutants, such as rhodamine B, phenol, or methyl orange. Polymeric composites based on WO3, Fe2O3, or Bi2MoO6 were also described. The influence of different polymeric composites and photocatalytic parameters (light spectra and intensity, pollutant molecule and concentration, irradiation time, and photocatalyst dosage) on the overall photocatalytic efficiency indicates that semiconductor (TiO2, ZnO, etc.) insertion in the polymeric matrix can tune the photocatalytic activity without compromising the structural integrity. Future perspectives and limitations are outlined considering the systematic and targeted description of the reported results. Adopting green route synthesis and application can add economic and scientific value to the knowledgebase by promoting technological development based on photocatalytic designs.
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Anionic Polymerization of Para-Diethynylbenzene: Synthesis of a Strictly Linear Polymer. Polymers (Basel) 2022; 14:polym14050900. [PMID: 35267720 PMCID: PMC8912582 DOI: 10.3390/polym14050900] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 02/15/2022] [Accepted: 02/19/2022] [Indexed: 01/11/2023] Open
Abstract
Anionic homo- and copolymerization of p-diethynylbenzene in the presence of n-BuLi in polar solvents was carried out. The use of hexamethylphosphortriamide (HMPA) makes it possible to synthesize a completely linear soluble polymer that does not have branching and phenylene fragments. A copolymer of p-diethynylbenzene with diphenyldiacetylene was synthesized. Homo- and copolymers of p-diethynylbenzene have high thermo- and thermo-oxidative stability. By the interaction of side reactive ethynylphenylene groups with various reagents, it is proposed to synthesize clusters along the conducting chain of poly-p-diethynylbenzene. Due to presenting C≡CH side groups, boron, copper, and cobalt derivatives were synthesized. It is shown that not all theoretically possible stereoisomers can be formed as a result of the polymerization. The application of p-diethynylbenzene polymers for the modification of industrial samples of epoxy novolac resin, oligoester acrylates, and carbon fibers has been demonstrated.
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16
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Jiang HY, Qian J, Hou J, Tian M, Bai Y, Li C. High concentration of methyl orange elimination by targeted construction of an α-Bi 2O 3/Ph–CC–Cu Z-scheme. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01590k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We anchored Ph–CC–Cu onto the surface of α-Bi2O3 nanoparticles to directionally construct Z-scheme heterojunctions, which are significantly efficient for the elimination of methyl orange with high concentration (98 mg L−1) in waste water.
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Affiliation(s)
- Hai-Ying Jiang
- Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, and the Energy and Catalysis Hub, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, People's Republic of China
| | - Jing Qian
- Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, and the Energy and Catalysis Hub, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, People's Republic of China
| | - Jiawei Hou
- Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, and the Energy and Catalysis Hub, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, People's Republic of China
| | - Meng Tian
- Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, and the Energy and Catalysis Hub, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, People's Republic of China
| | - Yadi Bai
- Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, and the Energy and Catalysis Hub, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, People's Republic of China
| | - Chengbo Li
- Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, and the Energy and Catalysis Hub, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, People's Republic of China
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