生物炭热解温度对TiO_(2)/生物炭复合材料光催化降解甲基橙的影响  

Effect of pyrolysis temperature of biochar on photocatalytic degradation of methyl orange by TiO_(2)/biochar composites

作　　者：梁胜容 安明泽 夏赛男 覃毅雪 徐国敏 Liang Shengrong;An Mingze;Xia Sainan;Qin Yixue;Xu Guomin(College of Materials and Metallurgy,Guizhou University,Guiyang 550025;Guizhou Material Industrial Technology Institute,Guiyang 550022;National Engineering Research Center for Compounding and Modification of Polymer Materials,Guiyang 550014)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]贵州省材料产业技术研究院,贵阳550022 [3]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《化工新型材料》2024年第9期180-188,共9页New Chemical Materials

基　　金：贵州省科技支撑计划项目(黔科合基础-ZK[2023]一般158号和[2020]1Y183号)。

摘　　要：以热解法制备不同温度的玉米秸秆生物炭(BC-i)(i=400℃、500℃、600℃、700℃、800℃和900℃),并通过超声辅助真空浸渍法制备了一系列TiO_(2)/生物炭复合材料(TBC-i)。结果表明:TBC-i光催化活性的提高可归因于生物炭良好的结构特性、BC与TiO_(2)之间增强的化学相互作用以及促进的光生电子-空穴的分离和转移效率。TBC-i的光催化活性均高于纯TiO_(2),TBC-800表现出最佳的光催化活性,在催化剂投加量为7g/L时,TBC-800催化剂经模拟日光照射270min后对50mg/L MO的去除率为93.02%。TBC-i复合材料的制备在一定程度上为模拟有机污染物在太阳光下的降解提供了思路。Corn straw biochar(BC-i)was prepared by pyrolysis at different temperatures(i=400℃,500℃,600℃,700℃,800℃and 900℃),and a series of TiO_(2)/biochar composites(TBC-i)were prepared by ultrasonic-assisted vacuum impregnation.The results showed that the improvement of photocatalytic activity of TBC-i could be attributed to the excellent structural properties of biochar,the enhanced chemical interaction between BC and TiO_(2)as well as the promoted separation and transfer efficiency of photogenerated electrons and holes.The photocatalytic activity of TBC-i was higher than that of pure TiO_(2),and TBC-800 exhibited the best photocatalytic activity.When the catalyst dosage was 7g/L,the removal rate of 50mg/L MO by TBC-800 catalyst after simulated sunlight irradiation for 270min was 93.02%.The successful preparation of TBC-i composites provided an idea for simulating the degradation of organic pollutants in sunlight to some extent.

关 键 词：TiO_(2)/生物炭复合材料 生物炭热解温度 甲基橙 光催化降解 

分 类 号：X131.2[环境科学与工程—环境科学]