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Nano Research 2018年第2期11卷 1109-1123页

作者： Ruowen Liang Renkun Huang Shaoming Ying Xuxu Wang Guiyang Yan Ling Wu Department of Chemistry Fujian Province University Key Laboratory of Green Energy and Environment Catalysis Ningde Normal University Ningde China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou University Fuzhou China

A simple, facile in situ reduction approach is reported for the synthesis of Pd- nanoparticle-decorated phosphotungstic acid （PTA）-MIL-100（Fe） nanocomposites （Pd-H3PW12040-MIL-100（Fe）, denoted Pd-PTA-MIL-100（Fe））. During the in situ synthesis, PTA is encapsulated into the matrix of MIL-100（Fe） and serves as a UV-switchable reducing agent, resulting in highly dispersed Pd NPs. Using the photocatalytic degradation of pharmaceuticals and personal care products as model reactions, the ternary Pd-PTA-MIL-100（Fe） hybrids exhibited enhanced photocatalytic activity compared with their foundation matrices, the binary PTA-MIL-100（Fe） nanocomposite. Based on photoelectrochemical analyses, the improved photocatalytic performance can be attributed to the well-known electronic conductivity of the Pd NPs, the fast electron transport of PTA, the intense visible-light absorption of MIL-100（Fe）, and the matched energy levels of the three components： MIL-100（Fe）, PTA, and Pd NPs. Importantly, almost no Fe and W ions were leached from the samples during the reaction, demonstrating the photostability of the Pd-PTA-MIL-100（Fe） composite. In addition, possible photocatalytic reactions mechanisms have also been investigated.

关键词： MIL-IOO(Fe) polyoxometalates (POMs) Pd visible light pharmaceuticals andpersonal care products(PPCPs)

The cycloaddition reaction using visible light photoredox catalysis

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Science China Chemistry 2016年第2期59卷 161-170页

作者： Yu Liu Renjie Song Jinheng Li Department of Chemistry and Chemical Engineering Hunan Institute of Science and TechnologyYueyang 414005China State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineer ingHunan UniversityChangsha 410082China

In recent years, visible light photoredox catalysis has emerged as an important research area in synthesis. In this review, we describe the recent progress in the visible light induced cycloaddition reactions, including [2+2], [3+2], [4+2] and [2+2+2] cycloadditions, for the construction of four-, five- or six-membered cycles and polycycles. Furthermore, the mechanisms for these transformations are also discussed, in which the formation of the radicals is initiated by a visible light photoredox catalysis process.

关键词： cycloaddition annulation visible light photoredox

Efficient photodegradation of phenol assisted by persulfate under visible light irradiation via a nitrogen-doped titanium-carbon composite

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Frontiers of Chemical Science and Engineering 2021年第5期15卷 1125-1133页

作者： Yan Cui Zequan Zeng Jianfeng Zheng Zhanggen Huang Jieyang Yang State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan030001China

To realize the utilization of visible light and improve the photocatalytic efficiency of organic pollutant degradation in wastewater,a nitrogen-doped titanium-carbon composite(N-TiO_(2)/AC)prepared by sol-gel methods was applied in the photodegradation of phenol assisted by persulfate under visible light irradiation(named N-TiO_(2)/AC/PS/VIS).The results show that a synergistic effect exists between visible-light photocatalysis and persulfate *** with TiO_(2)/PS/VIS,the phenol degradation rate was found to be observably improved by 65%in the N-TiO_(2)/AC/PS/VIS *** significant increase in degradation rate was mainly attributed to the following two factors:1)The N and C doping can change the crystal structure of TiO_(2),which extends the TiO_(2)absorption wavelength range to the visible light region.2)As an electron acceptor,PS can not only prevent electrons and holes from recombining with each other but can also generate strong oxidizing radicals such as·SO_(4)^(−) and·OH to accelerate the reaction *** process of phenol degradation was found to be consistent with the Langmuir pseudo-first-order kinetic model with an apparent rate constant k of 1.73 min^(−1).The N-TiO_(2)/AC/PS/VIS process was proven to be a facile method for pollutant degradation with high pH adaptability,excellent visible-light utilization and good application prospects.

关键词： N-TiO_(2)/AC visible light photocatalysis persulfate activation phenol

Synthesis of novel CaCO_3/Ag_2CO_3/Ag I/Ag plasmonic photocatalyst with enhanced visible light photocatalytic activity.

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Science China(Technological Sciences) 2015年第11期58卷 1864-1870页

作者： SUN Lei WANG Yuan CHEN Wei State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences School of Chemistry and Environmental Engineering Changchun University of Science and Technology

In this work, novel CaCO3/Ag2CO3/AgI/Ag plasmonic photocatalysts were successfully synthesized by a two-step in situ ion exchange process and their photocatalytic properties were studied. The morphology, crystal structure and optical properties of the as-prepared CaCO3/Ag2CO3/AgI/Ag nanocomposites were characterized by transmission electron microscopy （TEM）, X- Ray diffraction （XRD）, and UV-vis diffuse reflectance spectroscopy. The photocatalytic activity of the obtained nanocomposites was evaluated by the photodegradation of methyl orange （MO） under visible light irradiation. It was found that the as-prepared CaCO3/Ag2CO3/AgI/Ag plasmonic photocatalyst exhibits high visible light photocatalytic activity. With an optimized composition, MO dye can be decomposed by more than 94% within 15 min under visible light irradiation. Moreover, the photocatalytic stability could be greatly improved upon the addition of Na2CO3 into the photocatalytic system. From the proposed photocatalytic mechanism, the strong surface plasmon resonance effect of Ag nanoparticles and the efficient separation of photogenerated electrons and holes can effectively enhance the photocatalytic performance of the CaCO3/Ag2COj AgI/Ag composites.

关键词： photocatalyst surface plasmon resonance silver nanoparticle silver iodide visible light dye degradation

Construction of NH2-MIL-125(Ti)/Bi2WO6 composites with accelerated charge separation for degradation of organic contaminants under visible light irradiation

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Green Energy & Environment 2020年第2期5卷 203-213页

作者： Sheng Yin Yong Chen Ming Li Qingsong Hu Yi Ding Yifan Shao Jun Di Jiexiang Xia Huaming Li School of Chemistry and Chemical Engineering Institute for Energy ResearchJiangsu University301 Xuefu RoadZhenjiang 212013China School of Ecological and Environmental Science Shanghai Key Laboratory for Urban Ecological Processes and Eco-RestorationEast China Normal UniversityShanghai 200241China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore

Photocatalysis is considered as an ideal strategy for water pollution ***,it remains challenging to design a highly efficient photo-catalytic system through regulating the charge flow via a precise *** this work,a novel NH2-MIL-125(Ti)/Bi2WO6 composite was constructed via self-assembly growing Bi2WO6 nanosheets on NH2-MIL-125(Ti)*** characterization results demonstrated that NH2-MIL-125(Ti)was successfully incorporated into Bi2WO6 and the photoexcited carriers could be efficiently separated and transferred between the two ***2-MIL-125(Ti)/Bi2WO6 composites displayed enhanced photocatalytic activity for the removal of rhodamine B(RhB)and tetracycline(TC)under visible light irradiation,and the optimal weight ratio of NH2-MIL-125(Ti)was determined to be 7 wt%.The introduction of NH2-MIL-125(Ti)into Bi2WO6 could raise the absorption of visible light,accelerate the separation and transfer of charge carriers,and boost photocatalytic *** research presents a wide range of possibilities for the further development of novel composites in the field of environment purification.

关键词： NH2-MIL-125(Ti) Bi2WO6 nanosheets Charge separation Photocatalysis visible light

Efficient visible light photo-Fenton-like degradation of organic pollutants using in situ surface-modified BiFeO_3 as a catalyst

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Journal of Environmental Sciences 2013年第6期25卷 1213-1225页

作者： Junjian An Lihua Zhu Yingying Zhang Heqing Tang College of Chemistry and Chemical Engineering Huazhong University of Science and Technology Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education College of Chemistry and Materials ScienceSouth-Central University for Nationalities

The visible light photo-Fenton-like catalytic performance of BiFeO3 nanoparticles was investigated using Methyl Violet （MV）, Rhodamine B （RhB） and phenol as probes. Under optimum conditions, the pseudo first-order rate constant （k） was determined to be 2.21 × 10^-2, 5.56 × 10^-2 and 2.01 × 10^-2 min〈 for the degradation of MV （30 μmol/L）, RhB （10 μmol/L） and phenol （3 mmol/L）, respectively, in the BiFeO3-H202-visible light （Vis） system. The introduction of visible light irradiation increased the k values of MV, RhB and phenol degradation 3.47, 1.95 and 2.07 times in comparison with those in dark. Generally, the k values in the BiFeO3- H202-Vis system were accelerated by increasing BiFeO3 load and H202 concentration, but decreased with increasing initial pollutant concentration. To further enhance the degradation of pollutants at high concentrations, BiFeO3 was modified with the addition of surface modifiers. The addition of ethylenediamineteraacetic acid （EDTA, 0.4 mmol/L） increased the k value of MV degradation （60 μmol/L） from 1.01 × 10.2 min^-1 in the BiFeO3-H202-Vis system to 1.30 min^-1 in the EDTA-BiFeO3-H2O2-Vis system by a factor of 128. This suggests that in situ surface modification can enable BiFeO3 nano-particles to be a promising visible light photo-Fenton-like catalyst for the degradation of organic pollutants.

关键词： nanoscale BiFeO3 visible light photo-Fenton-like catalysis degradation surface modification

Mesopolymer modified with palladium phthalocyaninesulfonate as a versatile photocatalyst for phenol and bisphenol A degradation under visible light irradiation

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Journal of Environmental Sciences 2013年第8期25卷 1687-1695页

作者： Rong Xing Lin Wu Zhenghao Fei Peng Wu Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection Yancheng Teachers University Yancheng 224002 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University Shanghai 200062 China

A novel versatile photocatalyst, FDU-PdPcS, was prepared by immobilizing palladium phthalocyaninesulfonate （PdPcS） onto the FDU-15 mesopolymer via multi-step chemical modification processes involving chloromethylation of the FDU-15 mesopolymer first with chloromethyl methyl ether, a subsequent amination reaction with ethylenediamine, and finally modification with palladium phthalocyaninesulfonate via ionic interaction. The obtained FDU-PdPcS photocatalyst was characterized by the X-ray diffraction （XRD）, UV-Vis spectrosopy and inductively coupled plasma （ICP） techniques. This photocatalyst not only affords a high dispersion of monomeric PdPcS molecules, which may further be stabilized by the π-electron of benzene rings of FDU-15, but also provides a number of diamino groups inside the mesopores, which could be advantageous for the photodegradation of phenolic pollutants. In photodegradation studies of phenolic pollutants, the FDU-PdPcS catalyst exhibited excellent visible light photocatalytic activity and reusability. The photodegradation products of phenol and bisphenol A were investigated by the gas chromatoghraphy-mass spectrometry （GC-MS） technique. The results showed that the photodegradation products were composed of carboxylic acids and CO2. Isopropanol, sodium azide and benzoquinone were used as hydroxyl radical （OH.）, singlet oxygen （1O2） and superoxide radical （O2.-） scavengers, respectively. The results suggested that 1O2 and O2. were the prominent active species during the photodegradation process. A possible mechanism for the photodegradation of phenol was also discussed.

关键词： mesopolymer phthalocyanine photocatalysis visible light phenolic pollutants

Enhanced photoelectrochemical cathodic protection performance of MoS_(2)/TiO_(2)nanocomposites for 304 stainless steel under visible light

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Journal of Materials Science & Technology 2021年第5期64卷 21-28页

作者： Xiumin Ma Zheng Ma Dongzhu Lu Quantong Jiang Leilei Li Tong Liao Baorong Hou CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of ScienceQingdao266071China Institute of Marine Science and Technology Shandong UniversityQingdao266237China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071China

In this work,TiO_(2)nanotube arrays(NTAs)sensitized with MoS_(2)microspheres(MoS_(2)/TiO_(2)nanocomposites)were prepared on a flat Ti substrate via two-step anodization and hydrothermal method ***_(2)NTAs were composed of many orderly nanotubes,whose large specific surface area was favorable for light absorption and MoS_(2)microsphere *** MoS_(2)microsphere as a narrow band gap semiconductor extended the TiO_(2)NTAs’absorption band edge to the visible *** 2D structure of MoS_(2)microspheres and the construction of heterojunction electronic field at the interface of MoS_(2)microspheres and TiO_(2)NTAs promoted the separation of photoinduced *** MoS_(2)/TiO_(2)nanocomposites could provide higher photoelectrochemical cathodic protection for 304 stainless steel(304 SS)under visible light than pristine TiO_(2)NTAs.

关键词： Anti-corrosion TiO_(2)nanotube array MoS_(2)microspheres Photoelectrochemical cathodic protection visible light

Simple synthesis of BiOI/ZnO/rGO for efficient photocatalytic degradation of antibiotic chloramphenicol under visible light

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Journal of Environmental Sciences 2023年第12期134卷 65-76页

作者： Zihan Zhu Feng Guo Anming Li Weichao Xu Xuehan Zhang School of Ocean Science and Technology Dalian University of TechnologyPanjin 124221China

BiOI/ZnO/rGO(reduced graphene oxide) composite photocatalyst was fabricated using a simple one-step hydrothermal process and applied to the degradation of antibiotic chloramphenicol(CAP). By tuning the Bi/Zn ratios, the structure and photoelectric properties of the catalyst were investigated and characterized in terms of their morphological, structural, optical and photoelectrochemical properties. The as-synthesized composite photocatalysts are well-crystalline, uniform dispersion and exhibit good photocatalytic *** photocatalytic degradation rate of CAP by BiOI/ZnO/rGO composite is 8.1 times and 1.8times that of BiOI and ZnO, respectively. The photocatalytic mechanism studies revealed that the synergistic effect between rGO and BiOI/ZnO can effectively separate photogenerated electron–hole, enhance photocurrents and conductivity, and improve charge carrier densities. Moreover, BiOI/ZnO/rGO possesses good stability and reusability that the degradation efficiency remained above 80% even after 5 recycling. This study reveals that both the introduction of rGO and heterostructure construction between BiOI and ZnO play a crucial role in their photoelectrochemical and photocatalytic properties.

关键词： BiOI/ZnO/rGO(reduced graphene oxide) Photodegradation Chloramphenicol visible light

Magnetically Separable Straw@Fe_(3)O_(4)/Cu_(2)O Composites for Photocatalytic Degradation of Methyl Orange under visible light Irradiation

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1003-1009页

作者： Wang Jingjing Zhang Yawen School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China

Fe_(3)O_(4)and Cu_(2)O were successively immobilized on alkali-treated straw,and the magnetically separable straw@Fe_(3)O_(4)/Cu_(2)O composite was *** straw@Fe_(3)O_(4)/Cu_(2)O was characterized by Fourier transform infrared spectroscopy,X-ray diffraction,scanning electron microscopy,X-ray photoelectron spectroscopy and vibrating sample magnetometry,*** performance of the straw@Fe_(3)O_(4)/Cu_(2)O was evaluated by measuring the degradation of methyl orange(MO)under irradiation of visible *** introduction of Fe3O4 not only endowed the straw@Fe_(3)O_(4)/Cu_(2)O with magnetic separation feature but also significantly enhanced photocatalytic activity because Fe3O4 could prevent recombination of hole-electron *** active species capture experiment showed that holes(h+),hydroxyl(∙OH)and superoxide(∙O2ˉ)radicals all took part in the MO *** addition,the photocatalytic mechanism of straw@Fe_(3)O_(4)/Cu_(2)O was proposed based on the experimental *** five cycles for the photodegradation of MO,the straw@Fe_(3)O_(4)/Cu_(2)O still displayed good photocatalytic activity,suggesting that the as-prepared composite had great potential for practical use in wastewater treatment.

关键词： Straw Cu_(2)O Fe_(3)O_(4) Photocatalysis visible light