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Modulating charge separation via in situ hydrothermal assembly of low content Bi2S3 into UiO-66 for efficient photothermocatalytic CO2 reduction
Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2020-03-20 , DOI: 10.1016/j.apcatb.2020.118915
Xi Chen , Qiang Li , Juanjuan Li , Jing Chen , Hongpeng Jia

CO2 photocatalytic reduction into reusable carbon forms via photocatalyst is becoming increasingly attractive, providing feedstock for industrial production and daily life. However, most of these materials face the challenge of rapid recombination of charge carriers and deficient active sites, thus severely restricting the catalytic performance. Herein, a new strategy of interweaving Bi2S3 and UiO-66 via bulk-doping was established to enhance the charge transfer in Bi2S3/UiO-66, and a photothermocatalytic CO2 reduction process was also adopted to instead of traditional photoreduction, with the aim of greatly increasing the separation efficiency of electron-hole. Upon irradiation of UV-vis-IR light, the optimized catalyst possesses an impressive CO production rate (rCO =25.60 μmol g-1 h-1) and the good durability (at least for five cycles) without using any sacrificial agents. The efficient catalytic performance for CO2 reduction over the catalyst originates from thermally-assisted photocatalytic behavior.



中文翻译:

通过将低含量的Bi 2 S 3原位水热组装到UiO-66中来调节电荷分离,以有效地进行光热催化CO 2还原

通过光催化剂将CO 2光催化还原为可重复使用的碳形式变得越来越有吸引力,为工业生产和日常生活提供了原料。但是,大多数这些材料面临着电荷载流子快速重组和活性位点不足的挑战,从而严重限制了催化性能。在本文中,建立了通过体掺杂使Bi 2 S 3和UiO-66交织的新策略,以增强Bi 2 S 3 / UiO-66和光热催化CO 2中的电荷转移还采用还原法代替了传统的光还原法,目的是大大提高电子-空穴的分离效率。经过紫外-可见-红外光照射,优化的催化剂无需使用任何牺牲剂即可具有令人印象深刻的一氧化碳产生速率(r CO = 25.60μmolg -1  h -1)和良好的耐久性(至少五个循环)。通过催化剂进行CO 2还原的有效催化性能源自热辅助光催化行为。

更新日期:2020-03-21
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