通过同步原位生长 CsPbBr3 QD 和 CsPb2Br5 纳米片组装 Affinal 0D CsPbBr3/2D CsPb2Br5 架构：增强光催化 CO2 还原的活性和可重用性,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

通过同步原位生长 CsPbBr3 QD 和 CsPb2Br5 纳米片组装 Affinal 0D CsPbBr3/2D CsPb2Br5 架构：增强光催化 CO2 还原的活性和可重用性
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-10-19 , DOI: 10.1021/acsami.1c17870
Lan Ding ₁ , Burenbayaer Borjigin ₁ , Yuning Li ₂ , Xiaoxue Yang ₂ , Xiaojing Wang _{1,

2} , Huiqin Li ₁

Affiliation

通过人工光合作用将 CO ₂转化为有价值的化学原料是缓解能源和环境问题的有效策略。在此，我们开发了一种新型钙钛矿基催化剂，通过在仿生 2D CsPb ₂ Br ₅纳米片上原位生长 CsPbBr ₃量子点（QD）用于 CO ₂光转化。CsPbBr ₃ QD 是通过从其立方对应物上剥离层而产生的；同时，通过堆积剥离的层形成CsPb ₂ Br ₅纳米片。所得双相复合材料对气态 CO _{2 的}光催化转化表现出出色的活性和选择性在 300 W Xe 灯照射下，CO 生成率为 197.11 μmol g ^–1 h ^–1，是纯 CsPb ₂ Br ₅或 CsPbBr _{3 的}2.5 和 1.1 倍。重要的是，所制造的双相材料表现出极高的稳定性，并且能够在连续 10 小时的循环测试中在湿空气下保持不变的 CO ₂转化率。此外，由于原位组装策略，紧密接触允许 CsPbBr ₃ QD 中的光生电子快速转移到 CsPb ₂ Br ₅，并且这种结构中丰富的活性位点能够实现增强的 CO₂光转换活动。目前的工作为原位构建同质钙钛矿基复合光催化剂提供了一种有吸引力的方法，以确保人工光催化 CO ₂转化的稳定性和优异的活性。

"点击查看英文标题和摘要"

Assembling an Affinal 0D CsPbBr3/2D CsPb2Br5 Architecture by Synchronously In Situ Growing CsPbBr3 QDs and CsPb2Br5 Nanosheets: Enhanced Activity and Reusability for Photocatalytic CO2 Reduction

Conversion of CO₂ into valuable chemical feedstocks through artificial photosynthesis is an effective strategy to alleviate energy and environmental issues. Herein, we have developed a novel perovskite-based catalyst via in situ growing CsPbBr₃ quantum dots (QDs) on the affinal 2D CsPb₂Br₅ nanosheets for CO₂ photoconversion. CsPbBr₃ QDs were generated by peeling off layers from their cubic counterpart; meanwhile, CsPb₂Br₅ nanosheets were formed by heaping up the peeled layers. The resultant dual-phase composite exhibited outstanding activity and selectivity for photocatalytic conversion of gaseous CO₂ with a CO generation rate of 197.11 μmol g^–1 h^–1 under 300 W Xe lamp irradiation, which is 2.5 and 1.1 times higher than that of pure CsPb₂Br₅ or CsPbBr₃. Importantly, the fabricated dual-phase material presented extremely high stability and was able to maintain an unchangeable CO₂ conversion rate under wet air in the consecutive 10 h of recycling test. Furthermore, attributing to the in situ assembling strategy, the close contact allowed photo-generated electrons in CsPbBr₃ QDs to transfer rapidly to CsPb₂Br₅, and the affluent active sites in such an architecture enabled achieving enhanced CO₂ photoconversion activity. The present work provides an attractive approach for in situ constructing a consubstantial perovskite-based composite photocatalyst to ensure great stability and excellent activity for artificial photocatalytic CO₂ conversion.

更新日期：2021-11-03

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南