INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Mengqian Yuan,Fan Tian,Guangfang Li,Huiping Zhao,Yunling Liu,Rong Chen
In this work, hierarchical nanostructures Fe(III)-modified BiOBr were successfully prepared via a facile one-step route at room temperature. Compared with pure BiOBr, Fe(III)-modified BiOBr samples possess enhanced photocatalytic abilities for benzyl alcohol oxidation and organic dye degradation in the presence of H2O2 upon light illumination. The improved photocatalytic oxidation and degradation ability of Fe(III)-modified BiOBr is ascribed to the enhanced photogenerated carriers separation efficiency and promoted production of ·OH due to the generation of Fe2+ ions via interfacial charge transfer from Fe3+ ions. This work provides a facial approach to improve photocatalytic efficiency for organic synthesis and environmental remediation.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jiayi Chen,Xinyan Xiao,Yi Wang,Zhihao Ye
A novel Ag nanoparticles (NPs) decorated WO 3 nanoplates/g-C 3 N 4 (CN) nanosheets 2D/2D heterostructure was successfully synthesized by a solvent evaporation and in situ calcination method. The as-prepared WO 3 /Ag/CN ternary composite exhibited remarkably enhanced photocatalytic activity towards rhodamine B (RhB) and tetracycline (TC) degradation compared with WO 3 , CN, Ag/WO 3 , Ag/CN and WO 3 /CN under visible light irradiation. The enhanced photocatalytic activity could be attributed to the efficient separation of photogenerated charge carriers, the strong redox ability and enhancement of visible-light absorption derived from the construction of Z-scheme 2D/2D heterostructure. Ag NPs not only possess the surface plasmon resonance (SPR) effect, but also act as an electron mediator in Z-scheme heterostructure. The UV–vis absorption spectra analysis indicated that the loading of Ag NPs can enhance the visible-light adsorption. And the decreased photoluminescence and the increased photocurrent demonstrated the high separation rate of photoinduced charge carriers owing to the successful heterojunction construction. Furthermore, the possible degradation pathways of RhB and TC were proposed according to HPLC-MS analysis. The results of radical trapping experiments indicated that O 2 − and OH were the primary active species during the photocatalytic degradation process.
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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Cong Pan,Libin Fu,Yaobin Ding,Xueqin Peng,Qihang Mao
The application of MoS 2 to enhance Co(II)/peroxymonosulfate (Co(II)/PMS) system for organic pollutants degradation was developed, and the mechanism for pH dependent catalytic activity in the MoS 2 co-catalyzed Co(II)/PMS processes was systematically investigated. It was found that MoS 2 presented enhancement effect for Co(II)/PMS system in the tested pH range from 4.0 to 7.0, especially at pH 5.5 and 6.0. The pseudo first order reaction rates for Rhodamine B (RhB) degradation in MoS 2 -Co 2+ /PMS system at pH 5.5 and 6.0 were 3.2 and 1.8 times that in Co 2+ /PMS system (Co 2+ 2 μmol L −1 , PMS 0.2 mmol L −1 , MoS 2 0.5 g L −1 ). The redox recycle of Co 3+ /Co 2+ was promoted by Mo(IV) and S(-II) on MoS 2 surface and regenerated Co 2+ induced homogeneous activation of PMS for the robust production of free radical with the major of hydroxyl radicals . Increasing MoS 2 dosage, Co 2+ and PMS concentration can linearly raise RhB degradation rate in MoS 2 -Co(II)/PMS system. Moreover, MoS 2 exhibited excellent catalytic and chemical stability in recyclability and reuse for catalytic decontamination in MoS 2 -Co(II)/PMS system. This work gains new insight into the enhancement effect of MoS 2 in the meal ions/PMS system, and provides a high performance wastewater treatment process of Co(II)/PMS at low concentrated Co 2+ .
研究领域:
环境科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Lijiao Sun,Ying Wang,Lixian He,Jie Guo,Qingwen Deng,Xia Zhao,Ya Yan,Kezhen Qi
In this work, AgInS 2 (AIS) and cobalt (Co) doped AgInS 2 (Co-AIS) are prepared by low-temperature liquid phase method using thioglycolic acid (TGA) as the stabilizing agent. The crystal structure, surface elements, binding energy, particle morphology , and optical properties of AIS and Co-AIS are analyzed by XRD , XPS , SEM, TEM, UV-Vis-DRS, and PL . Rhodamine B (RhB) and 4-nitrophenol (4-NP) are used as the model pollutants for evaluating the photocatalytic activities of AIS and Co-AIS. The optimal doping ratio of CoːIn is found to be 10.7:6.3. And, under this optimal ratio, Co-AIS can degrade 95 % of RhB in 1.5 h or 76 % of 4-NP in 2.5 h, respectively. The photocatalytic mechanism is proposed based on the active species trapping experiment, EPR technique, optical properties characterization, and the flat-band potential determination. Moreover, the photocatalytic water splitting performance of Co-AISs with or without the modification of the multi-walled carbon nanotubes (MWCNTs) are investigated, and remarkable hydrogen production is achieved. This research will open a new gateway to synthesizing AgInS 2 -based materials and exploring their photocatalytic activities.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
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IF 6.707
Dong Liu,Chunling Li,Tianjun Ni,Ranpeng Gao,Jiayu Ge,Fengquan Zhang,Weidong Wu,Jinliang Li,Qian Zhao
Currently, the photo-Fenton oxidation has been increasingly studied in the domain of contaminant elimination. However, the lack of active sites and the slow charge migration in the catalytic process, still limit its practical application. 3D/0D hybrids offer a better opportunity for improving photo-Fenton activity due to their high charge mobility and increased number of catalytic sites, which is highly desirable but remains a large challenge. Herein, 3D interconnected porous g-C 3 N 4 hybridized with Fe 2 O 3 QDs (FCN) was developed and exhibited a porous structure and large specific areas. A large number of active sites and rapid charge separation/migration were achieved by the loading of ultrasmall Fe 2 O 3 QDs on the surface of g-C 3 N 4 . Moreover, the high charge mobility of this material promoted the fast conversion of Fe 3+ to Fe 2+ , resulting in the optimum synergistic effect between the photocatalytic and Fenton oxidation processes. Thus, the FCN catalysts exhibited excellent photo-Fenton oxidation activity towards the decomposition of organic contaminants (such as phenol, 2,4-dibromophenol, 2,4,6-trichlorophenol, rhodamine B and methyl orange). In addition, the roles of active species in the photo-Fenton oxidation reaction were also studied, and the results imply that the hydroxyl radicals played the most important role in the degradation of organic contaminants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Rui Lu,Lingxi Qiu,Yiwen Xie,Jiaying Luo,An Chen,Yang Xu,Tian Shang,Dongmei Jiang,Qingfeng Zhan
In this work, a novel Fe-doped AgBr microsphere photocatalyst was synthesized. The analysis of XRD, XPS, ICP and SEM distinctly demonstrated that the Fe ions were successfully doped into AgBr lattice. Under simulated solar light, the photocatalytic performance of organic contaminants rhodamine B (RhB) and ciprofloxacin (CIP) was considerably improved by Fe-doped AgBr. Notably, FA-3 (the molar ratio of Fe/Ag was 0.18 %), as the optimal photocatalyst, degraded nearly 100 % of RhB within 40 min, while AgBr only degraded 35 % of RhB. Moreover, the sample performed significantly enhanced mineralization ability, excellent degradation performance under different initial PH conditions, and stable photocatalytic ability after three cycles. Doping Fe ions modified the band structure of AgBr, introduced impurity levels to provide new electron transfer channels, and promoted the charge separation and transfer in AgBr semiconductors. This work provides an idea for the efficient degradation of organic pollutants by doping metal cations modified semiconductor photocatalysts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jie Xu,Hongji Li,Huimin Feng,Yuqin Ma,Dandan Wang,Jianwei Zhu
The removal of refractory organic contaminants in the environment is vital, but developing highly active catalysts with a simple synthesis process remains a challenge. Herein, NH 2 -MIL-125(Ti) (Ti-MOF) as a template, Ti 3+ -TiO x clusters of different quantities were embedded in the CdIn 2 S 4 nanosheets to construct Ti 3+ -TiO x /CdIn 2 S 4 (TiCIS) heterojunction by an in-situ self-assembly strategy, which had a hollow structure, strong visible light absorption, high separation rate of carriers, and more active sites. During the degradation experiment of Rhodamine B (RhB), TiCIS25 exhibited the best photocatalytic performance, and 98.0% of RhB was degraded within 60 min of visible irradiation. The intermediates in the RhB degradation and their ecotoxicity were analyzed, which revealed that RhB degradation was a detoxification process. The radical trapping experiments and electron spin resonance (ESR) tests indicated that e - , 1 O 2 , and ·O 2 - are the main active species for RhB degradation. Moreover, a possible photocatalytic mechanism was proposed based on electrochemical tests. The photodegradation performance of the as-prepared TiCIS catalyst under different reaction parameters (authentic water matrices, initial pH, coexisting anions, organic matter concentration, actual sunlight, reaction temperature, and multiple pollutants) and circulating experiments, as well as the photo-reduction process CO 2 , reflected that TiCIS25 possessed excellent practicability, cyclic stability, and universal applicability. Above all, TiCIS25 exhibited great potential in photocatalytic processes, and the work provided a feasible strategy for designing high-performance photocatalysts .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 30
·42921-42930
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IF 0
Ye Miaomiao,Luo Ziyi,Jin Wen,Wang Xingyuan,Zhang Tuqiao,Liu Xiaowei
The viewpoints on whether high concentrations of chloride ion (Cl − ) promote or inhibit the oxidation activity of activated persulfates are still inconclusive. Furthermore, the degradation of organic pollutants by the persulfates in the presence of high Cl − concentrations without any activation medium has not yet been studied. In this work, the efficiency and mechanism of degradation of organic pollutants such as carbamazepine (CBZ), sulfadiazine (SDZ), and phenol (PN) by Cl − -activated PMS (denoted as Cl − /PMS) were investigated. Results showed that Cl − could effectively activate PMS for the complete removal of CBZ, SDZ, and PN with reaction kinetic constants of 0.4516 min −1 , 0.01753 min −1 , and 0.06805 min −1 , respectively. Parameters such as PMS dose, Cl − concentration, solution pH, and initial concentrations of organic pollutants that affect the degradation efficiencies of the Cl − /PMS process were optimized. Unlike conventional activated persulfates, it was confirmed that the free chlorine was the main active species in the Cl − /PMS process. Finally, the degradation by-products of CBZ and SDZ as well as their toxicity were detected, and a possible degradation pathway for CBZ and SDZ was proposed. Though higher toxic chlorinated by-products were generated, the Cl − /PMS process was still an efficient oxidation method for the removal of organic pollutants in aqueous solutions which contain high concentrations of Cl − .
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Beizhao Chen,Meng Zhang,Li Wang,Li Li,Qi Han,Xun Liu,Mengxia Wang,Bei Liu,Yi Jiang,Zhongying Wang
The singlet oxygen ( 1 O 2 )-based nonradical AOP process, realized in carbon materials after nitrogen and metal doping, has drawn much attention in recent years. However, the exclusive generation of 1 O 2 in the specialized two-dimensional (2D) catalytic membranes and the associated contaminant degradation mechanisms remain unclear. Herein, a Fe-doped crystalline carbon nitride (Fe-CCN) material without additional nitrogen doping was developed to preferentially initiate 1 O 2 -based nanoconfined oxidation of organic pollutants in the 2D Fe-CCN membrane/PMS system. Density functional theory calculation revealed that the Fe-O-N configuration formed after Fe doping altered the electronic structure of Fe centers, enhancing PMS adsorption and promoting the thermodynamically favorable generation of the –O* intermediate, leading to fast and highly selective 1 O 2 generation. EPR characterization and ROS quenching experiment also confirmed that the Fe-CCN activated PMS, generating nearly 100 % 1 O 2 . The Fe-CCN membrane/PMS system exhibited excellent resistance to natural organic matter (NOM) interference and dramatically increased Bisphenol A (BPA) degradation kinetics, approximately 590 times faster than in conventional batch systems. Enhanced 1 O 2 exposure concentration within the Fe-CCN membrane nanochannels was supported by EPR data and 1 O 2 exposure simulations. Furthermore, The Fe-CCN membrane/PMS system showed wide pH tolerance, excellent pollutant degradation performance, and high stability. This work underscores the practical significance of 1 O 2 -based oxidation reactions in membrane-confined AOPs for the rapid and efficient removal of organic contaminants from water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Tianxing Cui,Yumei Su,Xionghui Fu,Yi Zhu,Yuanming Zhang
Herein, we fabricated hydroxyl groups decorated Bi 4 O 5 I 2 nanosheets, and the contents of hydroxyl groups on the surface could be controlled by changing the reducibility of organic solvents. The stronger reducibility of organic solvents, the more hydroxyl groups on the surface. The hydroxyl groups on the surface of Bi 4 O 5 I 2 nanosheets have significant effects on photocatalytic activity. For degradation of organic pollutants, the surface hydroxyls form hydrogen bonds with organic pollutants, which is conducive to the adsorption of the substrates. For NO removal, the NO adsorbed on the hydroxyl groups is more oxidized into a toxic by-product NO 2 instead of NO 3 - , so less hydroxyl groups are important for photocatalysts towards NO removal. These new discoveries provide new insights to improve photocatalytic activities by modulating surface functional groups of photocatalysts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Weihao Zhu,Yuanfeng Wu,Guiyun Yi,Xiaoxiao Su,Qiangsheng Pan,Shengbin Shi,Olayinka Oderinde,Guomin Xiao,Chuanxiang Zhang,Yulong Zhang
The present work is aimed at studying the synergistic catalysis of the bimetal ZIFs containing Co and Zn metal ions prepared by solvothermal method in the degradation of organic pollutants under ambient conditions. The bimetal mixed ZIFs were further characterized by some techniques such as XRD, SEM, TG-DTG, XPS, UV–vis, ESR, and N 2 -adsorption. Interestingly, the sample prepared with equal metal ions (1Zn:1Co) showed the highest catalytic performance for methylene blue (MB) degradation (94.10 %). This may be associated with the interaction between cobalt and zinc within the adjacent lattice, which make the MB molecule to be easily adsorbed and degraded on empty electron orbit. Furthermore, the highest degradation of MB was achieved with 98.83 % under the optimized conditions (catalyst weight of 50 mg, pH of 5, 3 h, 30 °C). Besides, the various substrates such as methyl orange, indole, rofloxacin, methyl blue, and tetracycline were also investigated under the same conditions. Additionally, the DFT calculation results suggested the more orbital distribution (LUMO, HOMO) of ZIF(1Zn:1Co) can result to more electrons being easily captured, and generate more radicals via electron transfer. Finally, the photocatalytic degradation of MB is consistent with the first law of kinetics, and the activation energy is 26.797 KJ/mol in the presence of ZIF(1Zn:1Co).
研究领域:
环境科学
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材料科学
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计算化学
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 124
·102868-102876
·
IF 3.84
Xiaodong Gu,Nuo Yu,Lisha Zhang,Jianmao Yang,Junqing Hu,Zhigang Chen
Semiconductor photocatalysis technology has great potential to become one of the most promising solutions for energy shortages and environmental pollution, and a prerequisite for the photocatalytic application is to obtain efficient, easily recyclable and large-area photocatalysts with nanostructures. In the present work, we have prepared TiO2 nanorod bundles on carbon fibers as flexible and weaveable photocatalyst/photoelectrode. The growth of TiO2 nanorod bundles is realized by using a dip-coating and hydrothermal growth method. TiO2 nanorod-bundles exhibit square-column appearance with size of about 340–400 nm and length of ∼6 μm, and they are in fact composed of small nanorods with diameters of ∼30 nm. Subsequently, 16 bunches of CFs with TiO2 nanorod bundles can be weaved to be a macroscale CFs/TiO2 cloth (weight: 0.2 g, total area: ∼35 cm2) with excellent conductivity and flexibility. With CFs/TiO2 cloth as the working electrode, photoelectrochemical measurements demonstrate that the separation of photo-induced charge carriers can be improved by increasing the applied voltage bias. Furthermore, under the illumination of simulated solar light, CFs/TiO2 cloth can degrade 94.0% Rhodamine B (RhB) in 100 min by photoelectrocatalytic degradation process (bias: 0.6 V vs. SCE), which is higher than the efficiency from single photocatalysis (60.8% RhB) or electrocatalysis (5.6% RhB) process. In addition, CFs/TiO2 cloth can be easily recycled with good performance stability. Therefore, this kind of CFs/TiO2 cloth can be used as a promising, easily recyclable and large-area photocatalyst/photoelectrode in practical application (such as degrading organic pollutants in lake and/or river). More importantly, this work provides some insights into the design of efficient and macroscale photocatalyst/photoelectrode with other nanosized semiconductor for enhancing visible-light-driven photocatalytic activity.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）