TiO_(2)负载木质素纤维的制备与光催化降解甲基橙性能研究  

Preparation of TiO_(2)-loaded lignin fiber and its photocatalytic degradation for methyl orange

作　　者：彭龙贵[1] 丁治玉 程焕全 张敏 董国庆 苏仕宾 Peng Longgui;Ding Zhiyu;Cheng Huanquan;Zhang Min;Dong Guoqing;Su Shibin(College of Materials Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054;College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an 710054;CRCC Shandong Locomotive&Rolling Stock Co.,Ltd.,Jinan 250022;Shaanxi Longbin Lide New Material Technology Co.,Ltd.,Xi'an 710054)

机构地区：[1]西安科技大学材料科学与工程学院,西安710054 [2]西安科技大学化学与化工学院,西安710054 [3]中车山东机车车辆有限公司,济南250022 [4]陕西龙宾立德新材料科技有限公司,西安710054

出　　处：《化工新型材料》2023年第9期161-167,共7页New Chemical Materials

基　　金：国家重点研发计划(2020YFC1910205)。

摘　　要：以木质素纤维为载体,采用碱性氧化法对载体木质素纤维进行预处理之后,使用钛酸四丁酯为钛源,采用溶胶-凝胶法制备了TiO_(2)负载木质素纤维复合光催化剂,并检测了在紫外光催化下对甲基橙的去除能力以及循环反应性能。TiO_(2)负载木质素纤维复合材料的结构性能通过X射线衍射(XRD)、扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)、热重分析(TG)等测试技术进行表征。结果表明:TiO_(2)颗粒均匀地分布在木质素纤维表面,合成了高度分散的TiO_(2)负载木质素纤维复合光催化材料;在钛酸四丁酯10mL、无水乙醇35mL、pH为3、温度为35℃时,TiO_(2)产率最高为89%;经紫外光照射2h,不同浓度下对甲基橙的降解率最高为75.5%,不同pH下对甲基橙降解率最高为80.1%,不同温度下对甲基橙溶液的最佳去除率为63.2%。TiO_(2)负载木质素纤维复合光催化剂再循环使用中,表现出较好的抗循环衰减特性,经过5次循环后,其对甲基橙的降解率仍达到77.6%。Using lignin fiber pretreated by alkaline oxidation method as the carrier and tetrabutyl titanate as the titanium source,a TiO_(2)-loaded lignin fiber composite photocatalyst was prepared by sol-gel method.The removal ability for methyl orange and the cyclic reaction performance under ultraviolet photocatalysis were tested.The structural performance of the TiO_(2)-loaded lignin fiber composite material was characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),Fourier infrared spectroscopy(FT-IR)analysis,and thermogravimetric analyzer(TG-DSC).The research results showed that the titanium dioxide particles were uniformly distributed on the surface of the lignin fiber,thereby forming a highly dispersed TiO_(2)-loaded lignin fiber composite photocatalytic material.When the tetrabutyl titanate was 10mL,the amount of anhydrous ethanol was 35mL,the pH was 3 and the temperature was 35℃,the highest yield of TiO_(2)was up to 89%.When under ultraviolet light for 2h,the highest degradation rate of methyl orange under different concentrations was 75.5%,the highest degradation rate of methyl orange under different pH values was 80.1%,and the best removal rate of methyl orange solution at different temperatures was 63.2%.The TiO_(2)-loaded lignin fiber composite photocatalyst showed good resistance to cycle attenuation during recycling.After 5 cycles,the degradation rate of methyl orange still reached 77.6%.

关 键 词：木质素纤维 二氧化钛 溶胶-凝胶法 光催化 甲基橙溶液 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]