一氧化碳
二氧化锡
选择性
光催化
乙烯
化学
退火(玻璃)
甲烷
二氧化碳
热液循环
纳米颗粒
无机化学
催化作用
光化学
材料科学
化学工程
纳米技术
有机化学
工程类
复合材料
作者
Juliana A. Torres,Gelson T.S.T. da Silva,Fernando Barbosa de Freitas Silva,Cauê Ribeiro
出处
期刊:ChemPhysChem
[Wiley]
日期:2020-10-23
卷期号:21 (21): 2392-2396
被引量:13
标识
DOI:10.1002/cphc.202000786
摘要
Abstract Tin dioxide (SnO 2 ) has intrinsic characteristics that do not favor its photocatalytic activity. However, we evidenced that surface modification can positively influence its performance for CO 2 photoreduction in the gas phase. The hydroxylation of the SnO 2 surface played a role in the CO 2 affinity decreasing its reduction potential. The results showed that a certain selectivity for methane (CH 4 ), carbon monoxide (CO), and ethylene (C 2 H 4 ) is related to different SnO 2 hydrothermal annealing. The best performance was seen for SnO 2 annealed at 150 °C, with a production of 20.4 μmol g −1 for CH 4 and 16.45 μmol g −1 for CO, while for SnO 2 at 200 °C the system produced more C 2 H 4 , probably due to a decrease of surface −OH groups.
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