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Frontiers of Chemical Science and Engineering 2023年第5期17卷 516-524页

作者： Yili Liu Guoliang Che Weizhong Cui Beili Pang Qiong Sun Liyan Yu Lifeng Dong College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Department of Physics Hamline UniversitySt.PaulMN 55104USA

All-inorganic cesium lead bromide(CsPbBr_(3))perovskite solar cells have been attracting growing interest due to superior performance stability and low ***,low light absorbance and large charge recombination at TiO_(2)/CsPbBr_(3)interface or within CsPbBr_(3)film still prevent further performance ***,we report devices with high power conversion efficiency(9.16%)by introducing graphene oxide quantum dots(GOQDs)between TiO_(2)and perovskite *** recombination of interfacial radiation can be effectively restrained due to enhanced charge transfer *** with C-rich active sites can involve in crystallization and fill within the CsPbBr_(3)perovskite film as functional semiconductor *** work provides a promising strategy to optimize the crystallization process and boost charge extraction at the surface/interface optoelectronic properties of perovskites for high efficient and low-cost solar cells.

关键词： all inorganic perovskite solar cells graphene oxide quantum dots high performance stability

Enhanced visible-light photocatalytic degradation and disinfection performance of oxidized nanoporous g-C3N4 via decoration with graphene oxide quantum dots

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Chinese Journal of Catalysis 2020年第3期41卷 474-484页

作者： Jing Xu Jin Huang Zhouping Wang Yongfa Zhu State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122JiangsuChina School of Food Science and Technology Jiangnan UniversityWuxi 214122JiangsuChina International Joint Laboratory on Food Safety Jiangnan UniversityWuxi 214122JiangsuChina Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxi 214122JiangsuChina Department of Chemistry Tsinghua UniversityBeijing 100084China

Oxidized nanoporous g-C3N4(PCNO)decorated with graphene oxide quantum dots(ox-GQDs)was successfully prepared by a facile self-assembly *** co-catalysts,the ultrasmall zero-dimensional(0 D)ox-GQDs can achieve uniform dispersion on the surface/inner channels of PCNO,as well as intimate contact with PCNO through hydrogen bonding,π-π,and chemical bonding *** contrast with PCNO,the ox-GQDs/PCNO composite photocatalysts possessed improved light-harvesting ability,higher charge-transfer efficiency,enhanced photooxidation capacity,and increased amounts of reactive species due to the upconversion properties,strong electron capturing ability,and peroxidase-like activity of the ***,the visible-light photocatalytic degradation and disinfection performances of the ox-GQDs/PCNO composite were significantly ***,the composite with a 0.2 wt.% deposited amount of ox-GQDs(ox-GQDs-0.2%/PCNO)exhibited optimum amaranth photodegradation activity,with a corresponding rate about 3.1 times as high as that of *** addition,ox-GQDs-0.2%/PCNO could inactivate about 99.6%of Escherichia coli(***)cells after 4 h of visible light irradiation,whereas only^31.9% of *** cells were killed by ***,h+,·O2-,and·OH were determined to be the reactive species generated in the photocatalytic process of the ox-GQDs/PCNO system;these species can thoroughly mineralize azo dyes and effectively inactivate pathogenic bacteria.

关键词： Photocatalysis Oxidized nanoporous g-C3N4 graphene oxide quantum dots Degradation Disinfection

Enhanced permeability and biofouling mitigation of forward osmosis membranes via grafting graphene quantum dots

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1470-1483页

作者： Nan Li Yumeng Zhang Peng Li Bo Zhu Wei Wang Zhiwei Xu State Key Laboratory of Separation Membranes and Membrane Processes School of Textiles Science and EngineeringTiangong UniversityTianjin 300387China State Key Laboratory of Separation Membranes and Membrane Processes School of ChemistryTiangong UniversityTianjin 300387China

In this paper,graphene oxide quantum dots with amino groups(NH_(2)-GOQDs)were tailored to the surface of a thin-film composite(TFC)membrane surface for optimizing forward osmosis(FO)membrane performance using the amide coupling *** results jointly demonstrated hydrophilicity and surface roughness of the membrane enhanced after grafting NH_(2)-GOQDs,leading to the optimized affinity and the contact area between the membrane and water ***,grafting of the membrane with a concentration of 100 ppm(TFC-100)exhibited excellent permeability performance(58.32 L·m^(–2)·h^(–1))compared with TFC membrane(16.94 L·m^(–2)·h^(–1)).In the evaluation of static antibacterial properties of membranes,TFC-100 membrane destroyed the cell morphology of Escherichia coli(***)and reduced the degree of bacterial *** the dynamic biofouling experiment,TFC-100 membrane showed a lower flux decline than TFC *** the physical cleaning,the flux of TFC-100 membrane could recover to 96%of the initial flux,which was notably better than that of TFC membrane(63%).Additionally,the extended Derjaguin–Landau–Verwey–Overbeek analysis of the affinity between pollutants and membrane surface verified that NH_(2)-GOQDs alleviates *** contamination of *** work highlights the potential applications of NH_(2)-GOQDs for optimizing permeability and biofouling mitigation of FO membranes.

关键词： forward osmosis membrane graphene oxide quantum dots graft modification anti-fouling membrane XDLVO theory

graphene quantum dots doped poly(vinyl alcohol)hybrid membranes for desalination via pervaporation

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Chinese Journal of Chemical Engineering 2023年第11期63卷 226-234页

作者： Yunyun Wan Lulu Yao Peng Cui School of Chemistry and Chemical Engineering Hefei University of TechnologyChina Anhui Province Key Laboratory of Controllable Chemical Reaction&Materials Chemical Engineering Hefei230009China

Pervaporation desalination by highly hydrophilic materials such as poly(vinyl alcohol)(PVA)based separation membrane is a burgeoning technology of late ***,the improvement of membrane flux in pervaporation desalination has been a difficult ***,a novel hybrid membrane with doped graphene oxide quantum dots(GOQDs)which is rich in hydrophilic groups and small size into the matrix of PVA was prepared to improve the membrane *** membranes structures were described by field emission scanning electron microscopy(FESEM),atomic force microscopy(AFM),Fourier transform infrared(FT-IR),differential scanning calorimetry(DSC),thermogravimetric analysis(TGA)and X-ray diffraction(XRD).And more,Water contact angle,swelling degree,and pervaporation properties were carried out to explore the effect of GOQDs in PVA *** addition,GOQDs content in the hybrid membrane,NaCl concentration,and feed temperature were investigated ***,the hydrogen bonds between PVA chains were weakened by the interaction between GOQDs and PVA ***,the hybrid membrane with optimized doped GOQDs content,200 mg·L^(-1),displays a high membrane flux of 17.09 kg·m^(-2)·h^(-1)and the salt rejection is consistently greater than 99.6%.

关键词： Pervaporation Desalination graphene oxide quantum dots Poly(vinyl alcohol) Membranes