Improved performance of visible-light photocatalytic H_(2)-production and Cr(Ⅵ) reduction by waste pigeon guano doped g-C_(3)N_(4) nanosheets  

作　　者：Yangli Ke Qingliang You Jing Ai Xiaofang Yang Qigao Shang Yanyang Liu Dongsheng Wang Guiying Liao 

机构地区：[1]Faculty of Materials Science and Chemistry,China University of Geosciences,Hubei 430074,China [2]Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China [3]Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science,School of Environmental Studies,China University of Geosciences,Wuhan 430074,China [4]State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [5]College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China

出　　处：《Journal of Materials Science & Technology》2023年第21期37-49,共13页材料科学技术（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.52070171 and 52030003);China Postdoctoral Science Foundation(Grant No.2022M710138).

摘　　要：In this study,waste pigeon guano(PG)was re-utilized as an ideal biomass adulterant to improve the photocatalytic activity of the pristine graphitic carbon nitride(g-C_(3)N_(4)).Waste PG and melamine were employed as precursors to fabricate a novel porous multielement-doped g-C_(3)N_(4)(CN-PG-S)nanosheets photocatalyst via in situ thermal polycondensation coupled with thermal exfoliation strategy.The CN-PG-S owned abundant uniformly porous structures,superior conductivity,and excellent photocatalytic abilities,resulting in highly-efficient H_(2)-production(1950μmol g^(–1) h^(–1))and Cr(Ⅵ)reduction(99.1%)un-der visible light,which increased by 22.9-folds and 5.3-folds more than that of pristine g-C_(3)N_(4).The non-metallic(P,S,and O)and metallic elements in CN-PG-S played a crucial role in expanding the visible-light absorption range and promoting the separation-migration of photogenerated electron-hole pairs.And the uniformly porous nanosheet structure of CN-PG-S shortens the diffusion paths of photogenerated carri-ers and exposes more active sites for photocatalytic reactions.This study proposed an eco-friendly re-sources integration strategy of waste PG to prepare excellent CN-PG-S photocatalysts for highly-efficient H_(2)-production and Cr(VI)reduction.

关 键 词：Pigeon guano(PG)doping g-C_(3)N_(4)nanosheets Photocatalyst H_(2)-production Cr(Ⅵ)reduction 

分 类 号：TB3[一般工业技术—材料科学与工程]