期刊文献+

纳米TiO2光催化降解植物激素的活性与机理 被引量:2

Activity and mechanism of nano-TiO2 photocatalytic degradation of phytohormone
原文传递
导出
摘要 以纳米TiO2为催化剂研究了紫外光照射下植物激素吲哚-3-乙酸和氯吡苯脲的降解过程和机理。基于吲哚-3-乙酸在278 nm处的特征吸收峰和氯吡苯脲在261 nm处的特征吸收峰,利用紫外-可见分光光度法对二者的光催化降解过程进行跟踪检测。在纳米TiO2催化下,紫外光照240 min吲哚-3-乙酸的降解率为61. 6%;紫外光照300 min氯吡苯脲的降解率高达90. 5%。动力学研究表明,吲哚-3-乙酸和氯吡苯脲的光降解反应均符合准一级反应动力学模型。通过自由基捕获实验确定·OH和·O2-是氧化分解植物激素的主要活性物质,并进一步给出纳米TiO2光催化降解植物激素的机理。在室温下实现了光催化降解植物激素,为解决环境中激素污染提供了一种可行的方法。 The degradation process and mechanism of two phytohormones,indole-3-acetic acid and 1-( 2-chloropyridin-4-yl)-3-phenylurea under UV irradiation were studied with nano-TiO2 as catalyst. Based on the intensity changes of characteristic absorption peak of indole-3-acetic acid at 278 nm and the characteristic absorption peak of 1-( 2-chloropyridin-4-yl)-3-phenylurea at 261 nm,the photocatalytic degradation process of the two phytohormones were detected using UV-vis spectrophotometry. In the presence of nano-TiO2,the degradation ratio of indole-3-acetic acid was 61. 6% under UV irradiation for 240 min,and the degradation ratio of 1-( 2-chloropyridin-4-yl)-3-phenylurea was up to 90. 5% under UV irradiation for 300 min. Kinetic studies suggested that the photodegradation of indole-3-acetic acid and 1-( 2-chloropyridin-4-yl)-3-phenylurea was in accordance with the pseudo-first-order kinetic model. The free-radical capture experiments proved that ·OH and ·O2-are the main active substances for oxidative decomposition of the two phytohormones,and the mechanism of photocatalytic degradation of phytohormones by nano-TiO2 was further discussed. This study realized the photocatalytic degradation of phytohormones at room temperature,which provided a feasible method for solving hormone pollution in the environment.
作者 赵宁 王大伟 彭路情 冯小飞 泽桑梓 杨斌 ZHAO Ning;WANG Dawei;PENG Luqing;FENG Xiaofei;ZE Sangzi;YANG Bin(Key Laboratory of Forest Disaster Warning and Control in Yunnan Province,Southwest Forestry University,Kunming 650224;Yunnan Forestry and Grassland Pest Control and Quarantine Bureau,Kunming 650051)
出处 《分析试验室》 CAS CSCD 北大核心 2020年第5期576-579,共4页 Chinese Journal of Analysis Laboratory
基金 云南省重点研发科技计划基金(2018BB009) 国家级大学生创新创业训练项目(201810677006)资助。
关键词 纳米TIO2 植物激素 光催化 氯吡苯脲 吲哚-3-乙酸 nano-TiO2 phytohormone photocatalysis 1-(2-chloropyridin-4-yl)-3-phenylurea indole-3-acetic acid
  • 相关文献

参考文献6

二级参考文献37

  • 1许立.扰乱内分泌的化学物质──环境荷尔蒙[J].化学教育,2001,22(3):1-2. 被引量:9
  • 2Hutchinson T H, Matthiessen P. Endocrine disruption in wildlife: identification and ecological re/evance. The Science of the Toted Environment, 1999, 233.
  • 3Colbom T, et al. Developmental effects of endocrine disrupting chemicals in wildlife and humans. Environ. Health Perspective, 1993,101.
  • 4Key S W. New study highlights hazards on hormone disrupting chemicals. World Disease (weekly Plus), 1998, (9).
  • 5Sharp R M, Skakkebaek N E. Are estrogens involved in falling sperm count and disorders of male reproductive tract Luncat, 1993, 341.
  • 6Allen Y, et al. The extent of estrogenic contaminants in the U K estuarine and marine environments--further surveys of founder. The Science of the Total Environment, 1999, 233.
  • 7Fox, GA1Effects of endocrine disruption chemicals on wildlife in Canada: past.present and future[J]. Water quality research of Canada 2001, 361.
  • 8陈萃,夏纪勇,唐朝波,唐谟堂,龙桂花.低温氧化法制备Bi_2O_3粉体新工艺研究[J].材料导报(纳米与新材料专辑),2008,22(2):124-127. 被引量:4
  • 9韩志刚,陈卫.磁性壳聚糖在水处理中的应用[J].净水技术,2009,28(1):15-19. 被引量:11
  • 10陈玮宣.稀禾啶制剂的高效液相色谱分析方法[J].农药科学与管理,1989,10(2):1-2. 被引量:2

共引文献34

同被引文献17

引证文献2

二级引证文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部