通过自牺牲法制备具有全光谱响应的 Cu(OH)CO/g-CN 异质结催化剂，具有优异的光催化 HO 生成性能。

Fabrication of a full-spectrum-response Cu(OH)CO/g-CN heterojunction catalyst with outstanding photocatalytic HO production performance via a self-sacrificial method.

机构信息

College of Chemistry, Chemical Engineering, and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China.

出版信息

Dalton Trans. 2018 Dec 18;48(1):182-189. doi: 10.1039/c8dt04081h.

DOI:10.1039/c8dt04081h

PMID:30516200

Abstract

Over the past few decades, near infrared light (NIR), as an important part of sunlight, has seldom been utilized in photocatalytic reactions. In this work, a full-spectrum-response Cu2(OH)2CO3/g-C3N4 photocatalyst with outstanding photocatalytic H2O2 production performance was synthesized. XRD, UV-Vis, N2 adsorption, XPS, PL, EIS and EPR are used to characterize the as-prepared catalysts. As a light absorber from UV to NIR, Cu2(OH)2CO3 can form more photogenerated electrons to recombine the holes in g-C3N4 through the "Z-scheme" mechanism. The as-prepared Cu2(OH)2CO3/g-C3N4 photocatalyst shows the H2O2 equilibrium concentration of 8.9 mmol L-1, over 16 and 26.9 times higher than that of neat g-C3N4 and Cu2(OH)2CO3. According to the Z-scheme mechanism, a "two channel route" to form H2O2 is proposed for the Cu2(OH)2CO3/g-C3N4 heterojunction catalyst.

摘要

在过去的几十年中，近红外光（NIR）作为太阳光的重要组成部分，很少被应用于光催化反应中。在这项工作中，我们合成了一种具有全光谱响应的 Cu2(OH)2CO3/g-C3N4 光催化剂，该催化剂具有出色的光催化 H2O2 生成性能。通过 XRD、UV-Vis、N2 吸附、XPS、PL、EIS 和 EPR 对所制备的催化剂进行了表征。作为一种从紫外光到近红外光的光吸收剂，Cu2(OH)2CO3 可以通过“Z 型”机制形成更多的光生电子，从而与 g-C3N4 中的空穴复合。所制备的 Cu2(OH)2CO3/g-C3N4 光催化剂的 H2O2 平衡浓度为 8.9mmol/L-1，分别是纯 g-C3N4 和 Cu2(OH)2CO3 的 16 倍和 26.9 倍。根据 Z 型机制，提出了一种“双通道途径”来形成 H2O2，用于 Cu2(OH)2CO3/g-C3N4 异质结催化剂。