Organic semiconductors(OSCs)possess diverse chemical structures and tailored optoelectronic properties via simple chemical modifications,so increasing use of them are found in efficient visible-light photo-catalysis.However,the weak chemical bonds and the poor charge behavior(e.g.,low concentration of free charge carriers,low carrier mobility)intrinsic in them,always incur quite limited stability and ef-ficiency.Therefore,the assembly of them into refined nanostructures or nanocomposites is usually pro-posed to enhance their optoelectronic properties,as well as the photocatalytic efficiency and reliability.Zero-dimensional(0D)nanoparticles are low in size and hence high specific surface area(SSA);One-dimensional(1D)nanostructures are usually arranged in an orderly long range thus leading to low surface defect density and increased carrier mobility;Two-dimensional(2D)nanostructures are particularly capa-ble of enhancing the photogenerated charge utilization because of their large reaction sites and shortened charge transport length.Furthermore,the building of heterogeneous interfaces in the nanocomposites can effectively facilitate the special charge separation.All these highlight the importance of organic nanos-tructures in improving the photocatalytic activity and stability.Therefore,organic semiconductor nanos-tructures(OSNs)have been increasingly used in the photocatalytic water splitting into H2 and O2,CO2 reduction,pollutant decomposition,disinfection,etc.In this review,we first examine the important opto-electronic properties of OSNs that govern the photocatalytic processes;we then analyze different classes of OSNs and their mechanistic pathways,with an emphasis on the structure-property relationships;we also introduced various photocatalytic applications of OSNs;we lastly propose the challenges and future outlook in real use.

Jiaqi Dong;Chuxuan Yan;Yingzhi Chen;Wenjie Zhou;Yu Peng;Yue Zhang;Lu-Ning Wang;Zheng-Hong Huang

School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,100083,China;Shunde Graduate School of University of Science and Technology Beijing,Foshan,528399,China;Key Laboratory of Advanced Materials(MOE),School of Materials Science and Engineering,Tsinghua University,Beijing,100084,China

材料科学技术（英文版）

[1]Jiaqi Dong;Chuxuan Yan;Yingzhi Chen;Wenjie Zhou;Yu Peng;Yue Zhang;Lu-Ning Wang;Zheng-Hong Huang-.Organic semiconductor nanostructures:optoelectronic properties,modification strategies,and photocatalytic applications)[J].材料科学技术（英文版）,2022(18):175-198

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