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光催化CO₂减少2D/0D CoAl-LDH@Cu₂O催化剂与p-n 异质连接

Zhiyao Wu¹, Xiyang Wang², Shuang Deng¹

¹State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, and School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.

|December 11, 2023

概括

这项研究开发了一种新型的p-n异构连接,使用分层双氧化物 (LDH) 和氧化铜 (Cu2O) 纳米粒子来增强光催化二氧化碳的减少,显著提高效率和稳定性.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
摄影化学的使用.

背景情况:

层状双氧化物 (LDHs) 具有催化作用的理想性质,包括超薄的2D结构和丰富的功能组.
诸如宽带差距和太阳光频谱利用率差等局限性阻碍了LDHs的光催化性能.

研究的目的:

通过将n型CoAl-LDH与p型Cu2O纳米粒子集成来设计一个p-n异质连接.
通过提高电荷分离和转移效率来增强光催化二氧化碳减排 (CO2RR).

主要方法:

一个 CoAl-LDH@Cu2O p-n 异质连接的制造.
使用X射线光电子光谱 (XPS) 和现场里埃变换红外光谱 (FTIR) 进行了表征.
在光照照射下对光催化CO2RR性能的评估.

主要成果:

该p-n异构连接表现出II型电荷转移机制,有效抑制了电子孔重组.
优化的CoAl-LDH@Cu2O-60 (LC-60) 复合物实现了320.9 μmol h−1 g−1的CO2RR产量,是原始CoAl-LDH的1.6倍.
异质连接表现出极好的稳定性,在四次催化循环后保持了84.1%的初始性能.

结论:

构建的p-n异构连接显著提高了光催化二氧化碳减排效率.
在异质连接接口的强大的内置电场对于有效的电荷分离和传输至关重要.
这项工作为设计用于可持续能源应用的基于LDH的先进材料提供了一个有前途的策略.

关键词:

能源材料能源材料的使用.材料化学材料化学光学材料的光学材料.

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