新型炭材料2022，Vol.37Issue(6)：1172-1182,11.DOI:10.1016/S1872-5805(21)60047-1
煤基石墨烯促进TiO2光催化降解有机物
Coal-based graphene as a promoter of TiO2 catalytic activity for the photocatalytic degradation of organic dyes
摘要
Abstract
Graphene oxide(GO)obtained from coal-based graphite by the Hummers method was hydrothermallly treated to ob-tain reduced GO(rGO).TiO2 was mixed with aqueous suspensions of GO and rGO and dried at 70℃to obtain GO-TiO2 and rGO-TiO2 with 95％(mass fraction)TiO2.TiO2 was also combined with a GO suspension by hydrothermal treatment to obtain rGO-hTiO2 with 95％TiO2.The three hybrids were used as catalysts for the photocatalytic degradation of rhodamine B(Rh B)and methyl or-ange(MO).Of the three materials,rGO-hTiO2 had the highest catalytic activity for the degradation of Rh B and MO under visible light irradiation.The reasons for having the best catalytic activity are that the incorporation of rGO into TiO2 helps increase its ad-sorption capacities for Rh B and MO as evidenced by adsorption in dark,and a narrowing of the TiO2 band gap as revealed by dif-fuse UV reflectance spectroscopy.This reduces the rate of recombination of electron-hole pairs by there being intimate contact between the TiO2 particles and rGO,forming Ti-O-C bonds as confirmed by XPS,with the TiO2 particles being uniformly decorated on the rGO sheets.关键词
煤基石墨烯/水热法/光催化降解/TiO2Key words
Coal-based graphene/Hydrothermal method/Photocatalytic degradation/Titanium dioxide分类
通用工业技术引用本文复制引用
刘国阳,李可可,贾嘉,张亚婷..煤基石墨烯促进TiO2光催化降解有机物[J].新型炭材料,2022,37(6):1172-1182,11.基金项目
This work was kindly supported by Open Fund Project of National Engineering Research Center of Coal Preparation and Purification(2018NERCCPP-B06),National Natural Science Foundation of China-Coal based low carbon joint Foundation of Shanxi Province(U1810113)and Natural Science Founda-tion of Shaanxi Province(2019JLP-12). 基金项目:国家煤加工与洁净化工程技术研究中心开放基金(2018NERCCPP-B06) （2018NERCCPP-B06）
NSFC-山西煤基低碳联合基金(U1810113) （U1810113）
陕西省自然科学基金-陕煤联合基金(2019JLP-12). （2019JLP-12）
