Facile synthesis and improved photocatalytic performance of Ag-AgCl photocatalyst by loading basic zinc carbonate
Facile synthesis and improved photocatalytic performance of Ag-AgCl photocatalyst by loading basic zinc carbonate
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通过负载碱式碳酸锌轻松合成 Ag-AgCl 光催化剂并提高其光催化性能
DOI：
10.1016/j.jallcom.2018.04.163
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发表时间：
2018
影响因子：
6.2
通讯作者：
Yu Huogen
中科院分区：
文献类型：
--
作者：
Wang Ping;Yu Chengde;Ding Junjie;Wang Xuefei;Yu Huogen
由于快速电荷转移和界面催化过程，助催化剂改性是提高光催化材料降解性能的一种有前途的方法。本工作通过简单的浸渍方法成功地将碱式碳酸锌作为一种新型助催化剂负载在Ag-AgCl的表面上（所得碱式碳酸锌修饰的Ag-AgCl被称为b-Zn/Ag-AgCl）。光催化降解结果表明，所有b-Zn/Ag-AgCl样品都表现出增强的光催化活性，b-Zn/Ag-AgCl的最高速率常数是未修饰的Ag-AgCl的2.7倍。重要的是，碱式碳酸锌可以作为通用助催化剂来增强除 Ag-AgCl 之外的其他银基光催化剂（Ag-AgBr、Ag-AgI、Ag-Ag3PO4 和 Ag-Ag2CO3）的光催化活性。因此，表明碱式碳酸锌可作为有效的电子助催化剂，快速转移电子并抑制金属银的形成，从而提高银基化合物的光催化性能和稳定性。该化合物是银基光催化剂中可用且有前途的助催化剂之一。
Cocatalyst modification is a promising approach for the improved degradation performance of photocatalytic materials owing to rapid charge transfer and interfacial catalytic process. In this work, basic zinc carbonate as a novel cocatalyst was successfully loaded on the surface of Ag-AgCl by a simple impregnation method (the resultant basic zinc carbonate-modified Ag-AgCl was referred as b-Zn/Ag-AgCl). Photocatalytic degradation results suggested that all the b-Zn/Ag-AgCl samples exhibited the enhanced photocatalytic activity, and the highest rate constant of b-Zn/Ag-AgCl was 2.7 times as high as that of the unmodified Ag-AgCl. Importantly, the basic zinc carbonate could work as a general cocatalyst to enhance the photocatalytic activity of other Ag-based photocatalysts (Ag-AgBr, Ag-AgI, Ag-Ag3PO4, and Ag-Ag2CO3) besides Ag-AgCl. Therefore, it is suggested that basic zinc carbonate functions as an efficient electron cocatalyst to quickly transfer electrons and inhibit the formation of metallic Ag for the promoted photocatalytic performance and stability of Ag-based compounds. This present compound is one of the available and promising cocatalysts for Ag-based photocatalysts.