可见光驱动铋单质光热协同催化CO_(2)还原  

Photocatalytic-thermal CO_(2) reduction on bismuth under visible light irradiation

作　　者：韩晓晶[1] 王玲[1] HAN Xiaojing;WANG Ling(Department of Chemical and Materials Engineering,Lyuliang University,Lüliang 033000,Shanxi,China)

机构地区：[1]吕梁学院化工与材料工程系,山西吕梁033000

出　　处：《工业催化》2024年第10期50-55,共6页Industrial Catalysis

基　　金：山西省高校科技创新类基金资助(2019L0976);吕梁学院博士科研启动基金资助;吕梁市引进高层次科技人才重点研发项目资助(2021RC-2-26);吕梁市科学技术局吕梁市平台基地建设项目资助(2021ZDSY-2-88);山西省基础研究计划(自由探索类)自然科学研究面上项目资助(202103021224318)。

摘　　要：温室气体CO_(2)具有较高的热力学稳定性,单纯的光驱动CO_(2)催化还原效率较低,光热协同在催化还原CO_(2)方面显现出了巨大的潜力。采用NaBH 4直接还原溶液中的Bi 3+制备铋(Bi)光催化剂。在200℃热辅助作用下,研究了Bi单质在可见光辐射下还原CO_(2)的过程。结果表明,单质铋在紫外、可见光区范围内具有光催化还原CO_(2)的能力。在450 nm的光辐照下,CO的生成率为5.4μmol·(g·h)^(-1),光热协同作用使单质铋具有优异的光催化活性和稳定性,4次循环使用后CO产率未见明显降低。Photothermal coordination has shown great potential in catalytic reduction of CO_(2)because of the high thermodynamic stability of the CO_(2)molecules and the low efficiency of the photocatalysts in visible light absorption and utilization.Here,the preparation of bismuth(Bi)photocatalyst is achieved by directly reducing of Bi 3+in aqueous solution by NaBH 4.The photocatalytic CO_(2)reduction to CO with the help of H_(2)O over the elemental Bi was investigated under visible-light irradiation at 200℃,which is termed as photocatalytic-thermal CO_(2)reduction.It was confirmed that the simple Bi has the photocatalytic ability in the whole ultraviolet and visible light region.Under irradiation at 450 nm,generation rate of CO was 5.4μmol·(g·h)^(-1).The synergetic effect between light irradiation and heating contributes to the excellent catalytic activity of Bi.The above results demonstrated there was no significant decrease in CO yield after 4 cycles.

关 键 词：催化化学 单质铋 催化 光热协同 CO_(2)还原 

分 类 号：O644[理学—物理化学]