钙钛矿(结构)
材料科学
共晶
纳米晶
光催化
共价键
光电效应
结晶
纳米技术
化学工程
光电子学
氢键
化学
分子
催化作用
有机化学
工程类
作者
Yuan‐Jun Cai,Qiu‐Xia Luo,Qiao‐Qiao Jiang,Xin Liu,Xiao‐Juan Chen,Jinlan Liu,Xiang‐Lan Mao,Jiaxin Qi,Ru‐Ping Liang,Jian‐Ding Qiu
出处
期刊:Small
[Wiley]
日期:2024-01-17
卷期号:20 (25)
被引量:3
标识
DOI:10.1002/smll.202310672
摘要
Abstract At present, poor stability and carrier transfer efficiency are the main problems that limit the development of perovskite‐based photoelectric technologies. In this work, hydrogen‐bonded cocrystal‐coated perovskite composite (PeNCs@NHS‐M) is easily obtained by inducing rapid crystallization of melamine (M) and N ‐hydroxysuccinimide (NHS) with PeNCs as the nuclei. The outer NHS‐M cocrystal passivates the undercoordinated lead atoms by forming covalent bonds, thereby greatly reducing the trap density while maintaining good structure stability for perovskite nanocrystals. Moreover, benefiting from the interfacial covalent band linkage and long‐range ordered structures of cocrystals, the charge transfer efficiency is effectively enhanced and PeNCs@NHS−M displays superior photoelectric performance. Based on the excellent photoelectric performance and abundant active sites of PeNCs@NHS−M, photocatalytic reduction of uranium is realized. PeNCs@NHS−M exhibits U(VI) reduction removal capability of up to 810.1 mg g −1 in the presence of light. The strategy of cocrystals trapping perovskite nanocrystals provides a simple synthesis method for composites and opens up a new idea for simultaneously improving the stability and photovoltaic performance of perovskite.
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