基于沸石分子筛固定Pt修饰P25的选择性降解环保型纳米光催化剂  

Selective eco-friendly nano photocatalysts synthesized by zeolite fixing Pt-decorated P25

作　　者：葛玮 黎成 杨清文 张新霓[1] 陈友强[1] GE Wei;LI Cheng;YANG Qingwen;ZHANG Xinni;CHEN Youqiang(College of Physics Science,Qingdao University,Qingdao 266071,China)

机构地区：[1]青岛大学物理科学学院,山东青岛266071

出　　处：《材料科学与工艺》2025年第1期56-63,共8页Materials Science and Technology

基　　金：国家自然科学基金资助项目(51772161)。

摘　　要：半导体纳米材料光催化技术已被广泛研究应用于去除水环境中的有机污染物,但其实际应用仍极具挑战性。本文采用水热法,通过Pt量子点改性和沸石晶体固定制备了Y型沸石分子筛包覆Pt修饰P25环境友好型光催化剂,并利用XRD、SEM、TEM等手段进行了表征,同时对其催化性能进行了研究。实验结果表明,Pt修饰P25@Y-zeolite光催化剂对苯胺叶绿素水溶液体系中的苯胺有害分子表现出优异的选择性光催化降解性能,在可见光光照420 min后,对苯胺的降解率高达96.5%,与紫外光光照240 min条件下的Pt修饰P25对苯胺的降解率(94.1%)基本相同。同时,Pt修饰P25@Y-zeolite对水体系中环境友好的叶绿素分子的降解率却很小,仅为4.8%,可以忽略不计。本研究为制备具有高效选择催化性能的环境友好型光催化剂提供了一种有效的方法。Semiconductor nanostructured photocatalytic technology has been widely investigated for organic pollutant removing but remains extremely challenging for practical application.In this paper,we report an environmentally-friendly photocatalyst,Y-type zeolite-fixed Pt-decorated P25 prepared by the hydrothermal synthetic method followed by Pt quantum dots(QDs)modification and the zeolite crystal fixation.The analysis techniques such as XRD,SEM,TEM,etc.were used to characterize the photocatalyst and its catalytic performance.Results showed that the Pt-decorated P25@Y-zeolite catalyst showed outstanding selective photodegradation properties for aniline with the degradation rate as high as 96.5%in the aqueous solution of aniline and chlorophyll under visible light illumination for 420 min,which was nearly the same as that of Pt-decorated P25(94.1%)under UV illumination for 240 min.Meanwhile,the degradation rate of the catalyst for chlorophyll was negligible with the value of only 4.8%.This study provides an effective approach to fabricating environmentally-friendly photocatalysts with remarkable abilities of highly efficient selective catalytic performance.

关 键 词：TiO_(2) Pt量子点 沸石 形状选择性 光催化 

分 类 号：TQ174[化学工程—陶瓷工业]