Compared catalytic properties of OMS-2-based nanocomposites for the degradation of organic pollutants
Compared catalytic properties of OMS-2-based nanocomposites for the degradation of organic pollutants
复制标题
OMS-2基纳米复合材料降解有机污染物的催化性能比较
DOI：
10.1016/j.cclet.2021.01.023
复制
发表时间：
2021-09-06
影响因子：
9.1
通讯作者：
Liu, Xiang
中科院分区：
文献类型：
--
作者：
Hou, Wenxin;Wang, Shuhui;Liu, Xiang
本研究以氧化锰八面体分子筛（OMS-2）为载体，设计Mn催化剂，优化其降解有机污染物的催化活性。本文采用预掺入和湿浸渍两种不同的合成策略合成了[PW]-OMS-2和[PW]/OMS-2。对于[PW]-OMS-2，能量色散x射线光谱（EDX）证实了分散的颗粒状磷钨酸附着并位于OMS-2的表面，同时一些W原子被掺杂到OMS-2的框架中。然而，对于[PW]/OMS-2， W原子不能进入OMS-2框架。在不同的合成策略和催化活性之间建立了相关性。与[PW]/OMS-2和OMS-2本身相比，[PW]-OMS-2对有机污染物的去除效果和稳定性最高。这可能与[PW]与OMS-2的协同作用有关，也可能与将W掺杂到OMS-2的框架中有关。因此，本研究提供了一种新型的环境友好型多相PMS活化剂，可用于降解有机污染物。(c) 2021中国化学学会、中国医学科学院药物研究所。Elsevier B.V.版权所有。
In this study, Mn catalysts have been designed based on manganese oxide octahedral molecular sieve (OMS-2) supports to optimize the catalytic activity in the degradation of organic pollutants. Herein, two different synthetic strategies: Pre-incorporation vs. wet-impregnation have been employed to synthesize [PW]-OMS-2 and [PW]/OMS-2. For [PW]-OMS-2, energy dispersive X-ray spectroscopy (EDX) confirmed that dispersed granular phosphotungstic acid attached and located at the surface of OMS-2, meanwhile some W atoms have been doped into frameworks of OMS-2. However, for [PW]/OMS-2, the W atoms cannot enter the OMS-2 frameworks. A correlation has been established between the different synthetic strategies and catalytic activities. The [PW]-OMS-2 is the most highly effective and stable over than [PW]/OMS-2 and OMS-2 itself for the organic pollutants removal. This may be caused not only by the synergetic effect of [PW] and OMS-2, but also by doping W into frameworks of OMS-2. Therefore, this work provides a new environmentally-friendly and heterogeneous PMS activator and it may be put into practice to degrade organic pollutants. (c) 2021 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.