State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, PR China.
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, PR China; School of Materials Science and Engineering, Linyi University, Linyi 276005, PR China.
J Colloid Interface Sci. 2022 Mar 15;610:455-462. doi: 10.1016/j.jcis.2021.12.005. Epub 2021 Dec 3.
Layered double hydroxides (LDHs) own admirable potential due to their controllable composition and exchangeable interlayer anions. Herein, pyrenetetrasulfonic acid (PTS) intercalated ZnAl-LDHs (denoted as ZnAl-xPTS, x represents the amount of NaPTS in the starting material) are synthesized by a co-precipitation method, which display enhanced photocatalytic activity towards the hydroxylation of phenylboric acid to phenol. Various characterizations suggest that PTS plays significant roles in improving the photocatalytic activity: (1) PTS extends the light absorption from ultraviolet to visible light region; (2) the introduction of PTS upshifts the conduction band, which is feasible for the formation of O; (3) ZnAl-xPTS produces more free electrons under light irradiation, which leads to greatly improved activity. This study develops an alternative LDHs based photocatalyst for the production of phenol, which also provides an efficient strategy to improve the photocatalytic activity of LDHs.
层状双氢氧化物（LDHs）由于其组成可控和层间阴离子可交换而具有令人瞩目的潜力。本文通过共沉淀法合成了苝四磺酸（PTS）插层的 ZnAl-LDHs（记为 ZnAl-xPTS，x 代表起始原料中 NaPTS 的量），其对苯硼酸羟基化为苯酚具有增强的光催化活性。各种表征表明 PTS 在提高光催化活性方面发挥了重要作用：（1）PTS 将光吸收从紫外光扩展到可见光区域；（2）PTS 的引入使导带向上移动，有利于 O 的形成；（3）ZnAl-xPTS 在光照下产生更多的自由电子，从而大大提高了活性。本研究开发了一种替代的 LDHs 基光催化剂用于生产苯酚，也为提高 LDHs 的光催化活性提供了一种有效策略。
