APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Bin Wang,Chengle Wang,Yanting Tang,Hao Yang,Yajie Tian,Xin Yu,Qian Li
High-performance composite photocatalysts attracts considerable research interests for the photodegradation of emerging pollutants under visible-light irradiation. In this study, hybrid AgCl-coated Ag 2 MoO 4 composites were synthesized using a chemical deposition strategy for the photodegradation of organic pollutants. The successful establishment of Ag 2 MoO 4 @AgCl nanostructures led to a highly decreased recombination of photo-generated electrons and holes, as well as significantly improved charge separation. The synthesized Ag 2 MoO 4 @AgCl composites exhibited markedly enhanced photocatalytic performance for the degradation of organic pollutants compared to pristine Ag 2 MoO 4 and AgCl due to the creation of unique heterostructures with strongly combined interfaces. Notably, the obtained Ag 2 MoO 4 @AgCl-11 composite demonstrated the highest photocatalytic performance for levofloxacin degradation with a first-order kinetic constant of 0.0436 min −1 , which was 31.14 times that of Ag 2 MoO 4 sample and 8.90 times that of AgCl sample. Furthermore, the synthesized Ag 2 MoO 4 @AgCl composites showcased an excellent photocatalytic stability. This work highlights the great potential of Ag-based composite photocatalysts for the efficient photodegradation of emerging pollutants under visible-light irradiation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 25
·期 1
·189-198
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IF 1.624
Feng Zhouzhou,Lv Xiang,Wang Tianhe
TiO 2 porous ceramic/Ag–AgCl composite was prepared by incorporating AgCl nanoparticles within the bulk of TiO 2 porous ceramic followed by reducing Ag + in the AgCl particles to Ag 0 species under visible light irradiation. The porous TiO 2 ceramic was physically robust and chemically durable, and the porous structure facilitated the implantation of AgCl NPs. Compared with the bare TiO 2 ceramic, TiO 2 porous ceramic/Ag–AgCl composite exhibited higher photocatalytic performance for the degradation of MO and RhB under visible light irradiation. The reaction rate constants k of MO and RhB degradation over TiO 2 porous ceramic/Ag–AgCl composite was respectively 6.25 times and 3.62 times higher than those recorded over the bare TiO 2 porous ceramic. The photocatalytic activity showed virtually no decline after four times cyclic experiments under visible light irradiation. Scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, photoluminescence spectra and X-ray photoelectron spectroscopy were used to characterize the TiO 2 porous ceramic/Ag–AgCl composite.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xueyan Li,Di Wu,Qingzhi Luo,Rong Yin,Jing An,Sijie Liu,Desong Wang
The novel ternary cyclized polyacrylonitrile (CPAN)/Ag/AgCl composites were successfully synthesized by a facile precipitation and photo-assistant reduction method. The CPAN/Ag/AgCl particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, UV–vis diffuse reflectance spectroscopy (UV–vis DRS), photoluminescence spectroscopy (PL), electrochemical impedance spectra (EIS) and photocurrent time (EI) measurement. The photocatalytic activities of the samples were investigated through the decomposition of methyl orange (MO) and rhodamine B aqueous solution under visible-light irradiation. The results showed that the CPAN/Ag/AgCl photocatalysts displayed much higher visible-light photocatalytic activity than Ag/AgCl, and the reaction rate constant of the MO degradation catalyzed by CPAN/Ag/AgCl is about 3 times of that by Ag/AgCl. It is proposed that the photogenerated holes h + and O 2 − played important roles in the photocatalytic degradation of MO in the presence of CPAN/Ag/AgCl composites under visible light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 7
·19450-19465
·
IF 5.19
Chen Haodong,Shu Qing
In this study, a series of ternary composite photocatalysts ZnO/g-C 3 N 4 /AgCl( x ) ( x is the amount of AgCl added, x =0.05, 0.1, 0.15 g) were synthesized, and various characterization methods were used to analyze the morphology, structural, and photochemical properties of the above samples. The photocatalytic activity of the obtained samples was evaluated by degrading rhodamine B (RhB) and acid orange (AOII) under xenon lamp irradiation. The results show that the degradation rate of ZnO/g-C 3 N 4 /AgCl (0.1 g) is 99% within 60 min, which is much higher than the 38% degradation rate of g-C 3 N 4 . After five cycles, the degradation efficiency of RhB and AOII by ZnO/g-C 3 N 4 /AgCl (0.1 g) were still 85% and 94%, respectively. In addition to colored dyes, the photocatalytic degradation of colorless tetracycline hydrochloride (TCH) compounds was also investigated to understand the effect of photosensitization on the degradation process. Based on the electronic structure analysis of the DFT calculations, a staggered heterojunction structure was found between g-C 3 N 4 , ZnO, and AgCl. The enhanced photocatalytic activity of the ternary composite is mainly attributed to the efficient separation of charge carriers through the synergistic removal of photogenerated electrons in g-C 3 N 4 by ZnO and AgCl. Radical trapping experiments confirmed that •O 2 − and h + were the main active species in the reaction system. As a visible light-responsive catalyst, ZnO/g-C 3 N 4 /AgCl can be effectively applied to the degradation of organic dye pollutants and has broad application prospects.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Zidan Zhou,Xinwen Peng,Linxin Zhong,Lan Wu,Xuefei Cao,Run Cang Sun
Electrospun cellulose acetate (CA) membrane was employed as a support that provided sites for AgCl crystals in situ growth. The Ag@AgCl crystals on electrospun CA composites with exposed {1 0 0} and {1 1 1} facets were fabricated at room temperature by a double diffusion technique. The crystal structure, morphology, composition, and absorption light ability of CA supported Ag@AgCl were characterized utilizing X-ray powder diffraction (XRD), scanning electron microscopy (SEM), attenuated total reflection-infrared intensity (ATR-IR), X-ray photoelectron spectroscopy measurements (XPS), energy dispersive spectrometer (EDS) and ultraviolet–visible (UV–vis) diffuse reflectance spectra, respectively. The photocatalytic activity of the catalysts was evaluated using methyl orange (MO) as a target. The CA supported cubic Ag@AgCl catalyst exhibited much higher catalytic activity than octahedral catalyst in terms of the degradation of MO under visible light. The 10 mg CA based cubes could completely degrade MO (10 mg L −1 ) in 160 min. The photocatalyst still exhibited a good catalytic ability after three times.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yilan Liu,Qingyu Lei,Jun Chen,Kaiyi Chen,Xin Wang,Jiamin Wei,Lianshe Fu,Rute A.S. Ferreira,Wei Dai,Tinghai Yang
Constructing heterojunctions to suppress the recombination rate of electron−hole pairs is an effective method for improving photocatalytic efficiency. However, the transfer rate of active species has rarely drawn attention. In this study, a nanoporous CoY-MOF photocatalyst with a channel transfer effect is developed. It is formed by one Co 3+ ion, one Y 3+ ion, and three deprotonated pyridine carboxylate ligands through coordination bond. Furthermore, a Z-scheme heterojunction CoY-MOF/AgCl composite photocatalyst is successfully constructed by coupling the nanoporous CoY-MOF with AgCl. The heterojunction interface of CoY-MOF/AgCl enhances significantly the separation efficiency of photogenerated electrons and holes, utilizes effectively charge carriers, and strengthens photocatalytic performance. More importantly, the channel transfer effect of the nanoporous MOF promotes the rapid migration of active species, increasing the transfer rate of reactants to the active species. The synergistic effect of these two aspects further improves the degradation efficiency of organic pollutants. Under visible light irradiation, the degradation efficiency of tetracycline (TC) for CoY-MOF/AgCl-35 within 21 min is approximately 87.56 %, which is higher than that of pure CoY-MOF (47.80 %) and AgCl (54.42 %). This paper provides a new strategy for constructing highly efficient heterojunction engineering in photocatalysis.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
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