无机材料学报, 2020, 35 (4): 482, 网络出版: 2021-03-01
掺磷非晶氧化钛负载铂用于高效催化氧化挥发性有机化合物 下载: 528次
非晶介孔材料 磷掺杂非晶氧化钛 铂纳米颗粒 甲苯催化氧化 VOCs消除 amorphous mesoporous structure phosphated TiO2 Pt nanoparticle toluene oxidation VOCs removal
摘要
高活性催化剂是挥发性有机化合物(VOCs)催化氧化消除的关键因素。本研究通过简单的共沉淀法成功制备了具有高比表面积的非晶介孔磷掺杂氧化钛负载铂催化剂(Pt/ATO-P)。通过P掺杂, 既可获得非晶介孔结构, 又可获得高ATO-P比表面积(可达278.9 m2·g-1)。非晶介孔Pt/ATO-P催化剂显示出优异的VOCs催化氧化性能和良好的热稳定性。Pt/ATO-P样品在空速为36000 mL·h-1·g-1、甲苯浓度为10000 mL·m-3的反应条件下, 对甲苯催化氧化的T50和T90(实现50%和90%转化率所需的温度)分别为130 ℃和140 ℃, 明显优于无磷催化剂Pt/TiO2。这些发现可以为拓展非晶介孔磷化材料在环境净化和能源转化等领域的应用提供重要参考。
Abstract
Development of high efficiency catalyst is the key factor to catalytic combustion of volatile organic compounds (VOCs). Herein, amorphous mesoporous phosphated TiO2 (ATO-P) with high specific surface area supported platinum catalyst was successfully fabricated. P-dopant can increase the surface area (up to 278.9 m2·g-1) of ATO-P, which is 21 times higher than that of pristine TiO2, and make the amorphous titanium oxide structure. The supported Pt catalyst with amorphous mesoporous feature shows impressive performance and excellent thermostability for VOCs oxidation. The Pt/ATO-P catalyst exhibits outstanding catalytic efficiency, the T50 and T90 (temperatures required for achieving conversions of 50% and 90%) are respectively 130 ℃ and 140 ℃, for toluene oxidation under high gas hourly space velocity (GHSV) of 36000 mL·h-1·g-1 and toluene concentration of 10000 mL·m-3. The performance is superior to the reference Pt/TiO2 and comparable with the state-of-the-art catalysts. These findings can make a significant contribution on the new applications of amorphous mesoporous phosphated materials in VOCs removal.
黄谢意, 王鹏, 尹国恒, 张绍宁, 赵伟, 王东, 毕庆员, 黄富强. 掺磷非晶氧化钛负载铂用于高效催化氧化挥发性有机化合物[J]. 无机材料学报, 2020, 35(4): 482. Xieyi HUANG, Peng WANG, Guoheng YIN, Shaoning ZHANG, Wei ZHAO, Dong WANG, Qingyuan BI, Fuqiang HUANG.