NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)复合材料的合成及其光催化性能研究  

Synthesis and photocatalytic properties of NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)composites

作　　者：王赵鹏 曾金 高艳 王春英[1,2] WANG Zhao-peng;ZENG Jin;GAO Yan;WANG Chun-ying(Jiangxi Provincial Key Laboratory of Environmental Pollution Prevention and Control in Mining and Metallurgy,Jiangxi University of Science and Technology,Ganzhou 341000,China;Key Laboratory of Development and Application of Ionic Rare Earth Resources,Ministry of Education,Ganzhou 341000,China)

机构地区：[1]江西理工大学矿冶环境污染防控江西省重点实验室,江西赣州341000 [2]离子型稀土资源开发及应用教育部重点实验室,江西赣州341000

出　　处：《化学研究与应用》2025年第4期828-837,共10页Chemical Research and Application

基　　金：江西省自然科学基金(20232BAB203040)资助;矿冶环境污染防控江西省重点实验室项目(2023SSY01071)资助。

摘　　要：采用多步水热法合成了NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)复合光催化剂。通过XRD、FI-IR、SEM、EDX、TEM、UV-vis DRS、BET等技术方法对催化剂进行了表征。通过模拟不同光照条件对丁铵黑药(ADD)的降解,考察了NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)的光催化活性。在催化剂剂量=0.6 g/L,pH=6,氙灯光照时间=90 min,ADD初始浓度=20 mg/L条件下,NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)对ADD的最大降解率达96%。得益于上转换材料性能,通过氙灯加滤光片的方式模拟可见光光照射下90 min后后NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)对ADD的最大降解率达90%。在100 W红外灯照射5 h后降解率达91%。复合材料通过Yb^(3+)敏化剂被激活,Yb^(3+)敏化剂将能量传递到Er^(3+)离子的发射位点,释放出可见光和近红外光子与TiO_(2)和Bi_(2)WO_(6)协同作用提高了光催化剂在红外光照射下的降解效率。NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)composite photocatalyst was synthesized by multi-step hydrothermal method.The catalysts were characterized by XRD,FI-IR,SEM,EDX,TEM,UV-vis DRS and BET.The photocatalytic activity of NaYF4:Yb,Er@TiO_(2)/Bi_(2)WO_(6)was investigated by simulating the degradation of ADD under different light conditions.Under the conditions of catalyst dose=0.6g/L,pH=6,xenon lamp illumination time=90 min and initial concentration of ADD=20 mg/L,the maximum degradation rate of ADD by NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)reached 96%.Thanks to the properties of the up-conversion material,the maximum degradation rate of ADD by NaYF_(4):Yb,Er@TiO_(2)/Bi_(2)WO_(6)reached 90%after 90 min of visible light irradiation simulated by xenon lamp and filter.The degradation rate reached 91%after 5h irradiation by 100 W infrared lamp.The composite material is activated by Yb^(3+)sensitizer,which transfers energy to the emission site of Er^(3+)ions,releases visible light and near-infrared photons,and synergies with TiO_(2)and Bi_(2)WO_(6)to improve the degradation efficiency of photocatalyst under infrared irradiation.

关 键 词：NaYF_(4) 上转换 TiO_(2) Bi_(2)WO_(6) 丁铵黑药 光催化 异质结 

分 类 号：O614.4[理学—无机化学]