Photoreduction of CO_(2) in the presence of CH_(4) over g-C_(3)N_(4) modified with TiO_(2) nanoparticles at room temperature

作     者：Ming Chen Jiachen Wu Chongchong Lu Xiao Luo Yangqiang Huang Bo Jin Hongxia Gao Xiaowen Zhang Morris Argyle Zhiwu Liang Ming Chen;Jiachen Wu;Chongchong Lu;Xiao Luo;Yangqiang Huang;Bo Jin;Hongxia Gao;Xiaowen Zhang;Morris Argyle;Zhiwu Liang

作者机构：Joint International Center for CO2 Capture and Storage(iCCS)Provincial Hunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide EmissionsDepartment of Chemical EngineeringCollege of Chemistry and Chemical EngineeringAdvanced Catalytic Engineering Research Center of the Ministry of EducationHunan UniversityChangsha410082China Department of Chemical and Petroleum EngineeringUniversity of WyomingLaramieWY82071USA Department of Chemical EngineeringBrigham Young UniversityProvoUT84602USA 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2021年第6卷第6期

页      面：938-951页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：financial support from the National Natural Science Foundation of China(21536003,21938002 and 21776065) Natural Science Foundation of Hunan Province in China(2019JJ20006) 

主　　题：Noble-metal-free Photoinduced CO_(2)-CH_(4) Sensitivity factors Surface acetate Inactivation 

摘      要：CO_(2)reduction under simulated sunlight over photocatalysts has become an attractive researcher area *** this work,carbon nitride compounds modified by TiO_(2)nanoparticles(TNPs)have been used for the photoreduction of CO_(2)in the presence of CH_(4)at room ***,a series of noble-metal-free TNP-graphitic-carbon nitride(g-C_(3)N_(4),also abbreviated CN)photocatalysts with different TNPs loadings and calcination temperatures have been synthesized by a wet-chemical *** characterization results of XRD,FTIR,SEM,TEM,BET,XPS,CO_(2)Adsorption,UV-vis,and PL demonstrate that the BET surface area and CO_(2)adsorption capacity have been improved after the ***,the g-C_(3)N_(4)has been successfully coupled with the TNPs and a heterojunction has formed at their *** characters contribute to increase the photocatalytic activity of TNPs-CN toward reducing CO_(2)in the presence of CH_(4),and its performance is better than bare g-C_(3)N_(4),Titania(P_(25))-CN,MgO-CN,or Cu_(2)*** experiments are then carried out to investigate the sensitivity factors and optimum *** sensitivity results show that the reaction pressure makes little difference on the photocatalysis results,which verifies the photoinduced CO_(2)-CH_(4)reaction has a tiny change in gas *** addition,under the optimum conditions,the turnover frequency(TOF)of CO after 4 h reaction can reach 9.98μmol g-cat.^(-1)h^(-1),and traces of ethane and ethylene have been detected during the *** addition,surface acetate and carbonaceous deposit are found on the(20)TNPs-CN/450 surface after continuous 24 h irradiation under the optimum conditions,which resulting in the inactivation of the ***,possible reaction mechanisms have been proposed based on the results.