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Synthesis plasmonic Bi/Bi VO4 Photocatalysts with enhanced photocatalytic activity for degradation of tetracycline(TC)

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Chinese Journal of Chemical Engineering 2019年第12期27卷 3053-3059页

作者： Nianjun Kang Dongbo Xu Weidong Shi School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China

In recent years,the excessive use of antibiotics has become a serious problem for human health.BiV04 regarded as one of the most promising visible-light-driven Photocatalysts was used to degrade the antibiotics.In this paper,we fabricated Bi/BiV04 plasmonic Photocatalysts which enhanced the photocatalytic activity of BiV04 for degradation of tetracycline(TC)antibiotic.The Bi/BiV04 Photocatalysts were characterized by X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,transmission electron microscopy and high-resolution transmission electron microscopy.In addition,the photocatalytic experiment results show that the 0.04-Bi/BiVO4 sample has the best photocatalytic activity for 2 times than the pure BiV04 photocatalyst.The cycle experiments,after four repetitions of the experiments,showed the sample still maintained a high photocatalytic activity.Finally,the photocatalytic reaction mechanism was also studied by free radical capture experiments and electron paramagnetic resonance spectroscopy.

关键词： Bi/BiVO4 Plasmonic Photocatalysts Tetracycline(TC) Visible light

Fabrication of biomaterial/TiO2 composite Photocatalysts for the selective removal of trace environmental pollutants

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Chinese Journal of Chemical Engineering 2019年第6期27卷 1416-1428页

作者： Yilin Zhao Yaoqiang Wang Gang Xiao Haijia Su Beijing Key Laboratory of Bioprocess Beijing Advanced Innovation Center for Soft Matter Science and Engineering(BAIC-SM)Beijing University of Chemical Technology

Trace environmental pollutants have become a serious problem with special attention on the hazardous heavy metals, refractory organics, and pathogenic microorganisms. With coupling biosorption and photocatalysis to develop biomaterial/TiO2 composite Photocatalysts is a promising method to remove these trace pollutants because of the synergistic effect. Biomaterials provide multiple function groups which can selectively and efficiently enrich trace pollutants onto the surface of the Photocatalysts, thus facilitating the following transformation mediated by TiO2 photocatalysis. Biomaterials can also help the dispersion and recovery of TiO2, or even modify the band structure of TiO2. The fabrication of chitosan/TiO2, cellulose/TiO2, as well as other biomaterial/TiO2 composite Photocatalysts is discussed in detail in this review. The application significance of these composite Photocatalysts for the selective removal of trace pollutants is also addressed. Several problems should be solved before the realistic applications can be achieved as discussed in the final section.

关键词： Biomaterial TiO2 Composite Photocatalysts Trace pollutants

Recent progress in research and design concepts for the characterization,testing,and Photocatalysts for nitrogen reduction reaction

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Carbon Energy 2023年第3期5卷 19-74页

作者： Benteng Sun Shucao Lu Yeye Qian Xiaoli Zhang Jian Tian School of Materials Science and Engineering Shandong University of Science and TechnologyQingdaoChina State Key Laboratory of Crystal Materials Shandong UniversityJinanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina

The reduction of molecular nitrogen(N_(2))to ammonia(NH_(3))under mild conditions is one of the most promising studies in the energy field due to the important role of NH_(3)in modern industry,production,and life.The photocatalytic reduction of N_(2)is expected to achieve clean and sustainable NH_(3)production by using clean solar energy.To date,the new Photocatalysts for photocatalytic reduction of N_(2)to NH_(3)at room temperature and atmospheric pressure have not been fully developed.The major challenge is to achieve high light-absorption efficiency,conversion efficiency,and stability of Photocatalysts.Herein,the methods for measuring produced NH_(3)are compared,and the problems related to possible NH_(3)pollution in photocatalytic systems are mentioned to provide accurate ideas for measuring photocatalytic efficiency.The recent progress of nitrogen reduction reaction(NRR)Photocatalysts at ambient temperature and pressure is summarized by introducing charge transfer,migration,and separation in photocatalytic NRR,which provides a guidance for the selection of future photocatalyst.More importantly,we introduce the latest research strategies of Photocatalysts in detail,which can guide the preparation and design of Photocatalysts with high NRR activity.

关键词： nitrogen reduction reaction Photocatalysts produced NH 3 measuring methods reaction mechanism research strategy

Ordered macroporous structured TiO_(2)-based Photocatalysts for CO_(2)reduction:A review

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Chinese Chemical Letters 2023年第12期34卷 53-64页

作者： Yifei Li Yuechang Wei Wenjie He Zhiling Tang Jing Xiong Zhen Zhao State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing 02249China

Herein,we review the significant of ordered macroporous(OM)TiO_(2)-based catalysts for boosting pho-tocatalytic CO_(2)reduction.Based on the need to improve the three key factors of photogenerated charge separation eficiency,solar energy utilization and CO_(2)adsorption rate during the conversion of CO_(2)to H_(2)O,we summarized five modification measures:including doping ions into OM TiO_(2),introducing sec-ond semiconductor coupling and noble metal nanoparticles for fabricating multiple Z-scheme heterojunc-tions,constructing hierarchical pore and carbon-loaded OM TiO_(2)materials,which effectively enhance the absorption rate of visible light,the separation rate of electrons-hole pairs and the selection of multiple active sites.The OM structured TiO_(2)-based Photocatalysts solve the single or multiple key factors for en-hancing photocatalytic performances during CO_(2)conversion.The catalytic mechanism and pathways of OM structured TiO_(2)-based Photocatalysts for CO_(2)reduction are discussed and summarized.It provides new insights on the development of high-efficient catalyst for photocatalytic CO_(2)conversion to solar fu-els.

关键词： TiO_(2)-based materials Hierarchical pore CO_(2)reduction Photocatalysts Solar fuels

CeO_(2)-Nb_(2)O_(5)Photocatalysts for degradation of organic pollutants in water

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Rare Metals 2020年第3期39卷 230-240页

作者： Nathália Pereira Ferraz Andre Esteves Nogueira Francielle Candian Firmino Marcos Vanessa Aguiar Machado Rene Rojas Rocca Elisabete Moreira Assaf Yvan Jesus Olortiga Asencios Institute of Marine Science Federal University of Sao PauloSantosSP11030-100Brazil Brazilian Center for Research in Energy and Materials(CNPEM) CampinasSP13083-970Brazil Sao Carlos Institute of Chemistry University of Sao PauloSao CarlosSP13566-590Brazil

The photocatalytic properties of CeO2-Nb2O5 Photocatalysts in heterogeneous photocatalysis(under ultraviolet and visible radiation)and in Fenton-like process were reported.Methylene blue dye(MB)and phenol(Ph)were used as models of pollutant molecules for these reactions,and the Photocatalysts were characterized by X-ray diffraction(XRD),diffuse reflectance spectroscopy(DRS),scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX)and thermally stimulated luminescence(TL).The results indicated that the addition of CeO2(0.3 wt%,1.0 wt%and 2.0 wt%)to Nb2O5 sensitized the resultant materials,increasing light absorption in the visible region.However,there is a suitable formulation of CeO2-Nb2O5 Photocatalysts to improve each photocatalytic process.In heterogeneous photocatalysis,the addition of small CeO2 quantities to Nb2O5 was enough to improve the photocatalytic activity of CeO2-Nb2O5 Photocatalysts(The best composition reported was CeO20.3 wt%.).The effectiveness of the catalyst was explained by the decrease in the number of trapping and luminescence centers in the conduction band of the material after the addition of CeO2 to Nb2O5,but a large amount of CeO2 decreased the number of trapping,luminescent and active centers to a large extent.Contrarily,in a Fenton-like process,the addition of CeO2 to Nb2O5 was favorable in all the proportions studied.(The best composition was 2.0 wt%CeO2.)In this case,the effectiveness was explained by the influence of the adsorption process(adsorption-triggered process),and the interactions between H2 O2 and Ce3+of the CeO2 in each photocatalyst thus formed surface peroxide species O22-,which induced the removal of the organic molecules under visible light.

关键词： Advanced oxidation process Photocatalysts Nb_(2)O_(5) CeO_(2) Phenol Methylene blue

Towards single-atom Photocatalysts for future carbon-neutral application

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SmartMat 2022年第3期3卷 417-446页

作者： Dongpeng Zhang Yanxiao Li Yi Li Sihui Zhan MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjinChina Department of Chemistry Tianjin UniversityTianjinChina

The implementation of carbon neutrality to achieve the goal of controlling global warming in the Paris Climate Agreement is currently the most important international climate issue.Efficient utilization of solar energy through Photocatalysts is of great significance to the adjustment of energy structure.Single-atom Photocatalysts have excellent catalytic activity and selectivity in a variety of applications,including sustainable energy conversion,chemical synthesis,CO_(2)reduction,environmental remediation,and other areas,owing to their unique electronic structure and high atom usage.Here,we elaborated on the content and implementation direction of the carbon neutrality policy and demonstrated the design principles of single-atom Photocatalysts.Recent single-atom synthesis strategies are summarized,and representative characterization methods have been shown to further reveal the structure–performance relationship.Then,we focus on the application of single-atom Photocatalysts in CO_(2)reduction,sustainable energy conversion,and environmental remediation.Finally,the opportunities and challenges in the application of single-atom Photocatalysts were discussed based on its current development.

关键词： carbon neutrality CO_(2)reduction hydrogen Photocatalysts single-atom catalysts synthesis strategies

可见光响应的高效石墨烯量子点光催化剂(英文)

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Science China Materials 2016年第1期59卷 12-19页

作者：葛介超蓝敏换刘卫敏贾庆岩郭亮周炳江孟祥敏牛广乐汪鹏飞 Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

本文提供了石墨烯量子点的应用新领域.在此前的研究中,我们发现以聚噻吩衍生物(PT2)为前驱物制备的石墨烯量子点在太阳光的照射下可高效产生单线态氧.本文进一步研究发现,此类石墨烯量子点在模拟太阳光的照射下(大于420 nm)可以快速多... 详细信息

本文提供了石墨烯量子点的应用新领域.在此前的研究中,我们发现以聚噻吩衍生物(PT2)为前驱物制备的石墨烯量子点在太阳光的照射下可高效产生单线态氧.本文进一步研究发现,此类石墨烯量子点在模拟太阳光的照射下(大于420 nm)可以快速多次降解水中有机污染物和高效灭杀细菌,表明石墨烯量子点在环境保护领域拥有巨大的应用潜力.

关键词： graphene quantum dots Photocatalysts metal-free visible-light-active

Photocatalytic and Electrocatalytic Generation of Hydrogen Peroxide: Principles, Catalyst Design and Performance

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Nano-Micro Letters 2023年第6期15卷 24-72页

作者： Yan Guo Xili Tong Nianjun Yang State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Institute of Materials Engineering University of Siegen57076 SiegenGermany Department of Chemistry Hasselt University3590 DiepenbeekBelgium IMO‑IMOMEC Hasselt University3590 DiepenbeekBelgium

Hydrogen peroxide(H_(2)O_(2)) is a high-demand organic chemical reagent and has been widely used in various modern industrial applications. Currently,the prominent method for the preparation of H_(2)O_(2) is the anthraquinone oxidation.Unfortunately, it is not conducive to economic and sustainable development since it is a complex process and involves unfriendly environment and potential hazards. In this context, numerous approaches have been developed to synthesize H_(2)O_(2). Among them, photo/electro-catalytic ones are considered as two of the most promising manners for on-site synthesis of H_(2)O_(2). These alternatives are sustainable in that only water or O_(2) is required. Namely, water oxidation(WOR) or oxygen reduction(ORR)reactions can be further coupled with clean and sustainable energy. For photo/electro-catalytic reactions for H_(2)O_(2) generation, the design of the catalysts is extremely important and has been extensively conducted with an aim to obtain ultimate catalytic performance. This article overviews the basic principles of WOR and ORR,followed by the summary of recent progresses and achievements on the design and performance of various photo/electro-catalysts for H_(2)O_(2) generation. The related mechanisms for these approaches are highlighted from theoretical and experimental aspects. Scientific challenges and opportunities of engineering photo/electro-catalysts for H_(2)O_(2) generation are also outlined and discussed.

关键词： H_(2)O_(2)generation Photocatalysts Electrocatalysts Reaction mechanisms

Fluorescent Superparamagnetic Core-Shell Nanostructures: Facile Synthesis of Fe@C-CN<sub>x</sub>Particles for Reusable Photocatalysts

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Advances in Nanoparticles 2019年第1期8卷 1-19页

作者： Sankaran Murugesan Oleksandr Kuznetsov Zhou Zhou Valery Khabashesku Center for Technology Innovation Baker Hughes a GE Company Houston USA

Synthesis and characterization of hybrid fluorescent superparamagnetic core-shell particles of Fe@C-CNx composition are presented for the first time. The prepared Fe@C-CNx hybrid nanoparticles were found to possess multifunctionality by exhibiting strong superparamagnetic properties and bright fluorescence emissions at 500 nm after the excitation with light in the UV-visible range. Fe@C-CNx also exhibits photocatalytic activities for organic dye degradation comparable to pure amorphous CNx with reusability through magnetic separation. The combination of magnetic and fluorescent properties of core-shell Fe@C-CNx nanoparticles opens opportunities for their application as sensors and magnet manipulated reusable Photocatalysts. Superparamagnetic Fe@C core-shell nanoparticles were used as the template material in the synthesis, where the carbon shell was functionalized through one-step free-radical addition of alkyl groups terminated with carboxylic acid moieties. The method utilizes the organic acyl peroxide of dicarboxylic acid (succinic acid peroxide) as a non-oxidant functional free radical precursor for functionalization. Further, covalently functionalized succinyl-Fe@C core-shell nanoparticles were coated with the amorphous carbon nitride (CNx) generated by an in-situ solution-based chemical reaction of cyanuric chloride with lithium nitride. A detailed physicochemical characterization of the microstructure, magnetic and fluorescence properties of the synthesized hybrid nanoparticles is provided.

关键词： Magnetic Nanoparticles Core-Shell Nanostructures Fe@C-CNx Fluorescence Photocatalysts