TiO_(2)/MMT复合材料降解盐酸四环素的研究  

Study on Degradation of Tetracycline Hydrochloride by TiO_(2)/MMT Composites

作　　者：李涛[1] 李丰川 吴明慧 黄建秀 李惠娟[1] Li Tao;Li Fengchuan;Wu Minghui;Huang Jianxiu;Li Huijuan(Key Laboratory of State Forestry and Grassland and Administration on Highly Efficient Utilization of Forestry Biomass Resources in Southwest China,Southwest Forestry University,Kunming,Yunnan 650224)

机构地区：[1]西南林业大学西南地区林业生物质资源高效利用国家林业和草原局重点试验室,云南昆明650224

出　　处：《非金属矿》2024年第1期83-87,共5页Non-Metallic Mines

基　　金：云南省农业联合专项基金(2018FG001-051);西南地区林业生物质资源高效利用国家林业和草原局重点实验室开放基金(2022-KF06)。

摘　　要：为解决抗生素废水排放带来的环境污染问题,以蒙脱土(MMT)为原料,采用水解法制备TiO_(2)/MMT复合材料,利用扫描电镜(SEM)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)和X射线光电子能谱(XPS)对TiO_(2)/MMT进行物相表征。以盐酸四环素(TC)为目标降解分子,考察了所制备的复合材料对TC的降解性能,并采用紫外-可见分光光谱(UV-vis)跟踪检测TC降解过程。物相表征表明,TiO_(2)均匀分散在MMT的表面;TiO_(2)/MMT中TiO_(2)为锐钛矿相。TiO_(2)/MMT回收样检测到N元素存在。活性数据表明,30%TiO_(2)/MMT(400℃,2 h)复合材料具有最优光催化降解TC性能,在紫外光下对100 mg/L TC的降解率达87.64%,优于纯TiO_(2)(68.74%)和纯MMT(72.22%)。循环试验6次后,催化剂对TC降解率仍达到75%,表明TiO_(2)/MMT对TC具有较高的降解活性和化学稳定性。·O_(2)^(-)和h^(+)是TiO_(2)/MMT光催化降解盐酸四环素的主要活性物质。In order to solve the problem of the environmental pollution caused by the discharge of antibiotic wastewater,TiO_(2)/MMT composites were prepared by hydrolysis method with montmorillonite(MMT)as raw material,and the phase characterization of TiO_(2)/MMT was performed by SEM,XRD,FTIR and XPS.Using tetracycline hydrochloride(TC)as the target degradation molecule,the degradation performance of the prepared composites on TC was investigated.The process of TC degradation was tracked by UV-vis spectroscopy.Phase characterization showed that TiO_(2) was uniformly dispersed on the surface of MMT.TiO_(2) in TiO_(2)/MMT was anatase phase.We detected the presence of N element of TiO_(2)/MMT recovery samples.The activity data showed that 30%TiO_(2)/MMT(400℃,2 h)composite had the best photocatalytic TC degradation performance,and the degradation rate of 100 mg/L TC under UV light was 87.64%,which was better than that of pure TiO_(2)(68.74%)and pure MMT(72.22%).After 6 cycles of the experiment,the catalyst still had 75%TC degradation activity,indicating that TiO_(2)/MMT had high TC degradation activity and chemical stability.·O_(2)^(-)and h^(+)were the main active substances for TiO_(2)/MMT photocatalytic degradation of tetracycline hydrochloride.

关 键 词：TiO_(2) MMT 光催化降解 盐酸四环素 

分 类 号：O644.1[理学—物理化学] X703[理学—化学]