四川农业大学学报 ›› 2016, Vol. 34 ›› Issue (03): 381-385.doi: 10.16036/j.issn.1000-2650.2016.03.020

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负载二氧化钛P25光催化剂对氨气的降解效果研究

蒲施桦1,2,3, 王浩1,3, 肖融1, 龙定彪1,2,3   

  1. 1. 重庆市畜牧科学院, 重庆 荣昌 402460;
    2. 农业部养猪科学重点实验室, 重庆 荣昌 402460;
    3. 农业部西南养殖工程科学观测实验站, 重庆 荣昌 402460
  • 收稿日期:2016-03-15 出版日期:2016-09-30 发布日期:2017-02-15
  • 通讯作者: 龙定彪,副研究员,博士,主要从事畜禽健康养殖研究,E-mail:87902798@qq.com。 E-mail:87902798@qq.com
  • 作者简介:蒲施桦,助理研究员,硕士,研究方向为畜禽养殖环境,E-mail:710108384@qq.com。
  • 基金资助:
    重庆市农发资金项目(14419);现代农业产业技术体系建设专项资金项目(CARS-36)

Study on the Photocatalytic Degradation of Ammonia by Titanium Dioxide P25

PU Shi-hua1,2,3, WANG Hao1,3, XIAO Rong1, LONG Ding-biao1,2,3   

  1. 1. Chongqing Academy of Animal Sciences, Rongchang 402460, Chongqing, China;
    2. Key Laboratory of Pig Industry Sciences, Ministry of Agriculture;
    3. Chongqing Key Laboratory of Pig Industry Sciences, National Scientific Experiment Station on Breeding Facilities Engineering, Ministry of Agriculture, Rongchang 402460, Chongqing, China
  • Received:2016-03-15 Online:2016-09-30 Published:2017-02-15

摘要: [目的] 通过探讨二氧化钛P25光催化剂对氨气的降解效果,为纳米技术在畜禽环境净化领域的应用提供参考依据。[方法] 试验以砂芯板为负载件,P25为负载光催化剂,首先对负载件砂芯板及二氧化钛P25进行了SEM、EDS、XRD表征;分别研究了不同氨气初始浓度(50、200、350和450 mg/L)、不同光源(500 W氙灯、11 W日光灯)对氨气的降解效果。[结果] 通过EDS及SEM分析发现负载件孔径小、空隙量大,比表面积大的特性,其中硅元素与TiO2相的界面上所形成的Si-O-Ti键能有效稳定光催化剂活性;二氧化钛P25对氨气催化作用40 min后,降解率达到饱和平衡状态;光源和初始浓度对氨气的降解效果有显著影响(P<0.05),在氙灯光源下,处理低浓度氨气(50 mg/L),二氧化钛P25的降解效果最佳,降解率达到95%。[结论] 采用砂芯板作为负载件利于光催化活性的稳定,二氧化钛P25对氨气具有光催化降解作用,但其降解效果受到反应时间、气体初始浓度以及光源类型的影响。

关键词: 二氧化钛P25, 氨气, 光催化, 降解效率, 砂芯板

Abstract: [Objective] This study provides a reference for the application of this technology in the field of purification of livestock and poultry environment via discussing the ammonia photocatalyst degradation by titanium dioxide P25. [Method] The sand core plate and P25 were used as photocatalytic materials, which were characterized by SEM、EDS、XRD. The experiment composite the effects of different initial concentrations of ammonia(50, 200, 350 and 450 mg/L), different light sources(500W xenon lamp, 11W fluorescent) on the degradation efficiency of ammonia. [Results] The sand core plate showed the features of small aperture, large amount of space and high specific surface area by SEM, EDS analysis. The degradation rate of Titanium Dioxide P25 remained stable after 40 minutes, reaching saturated equilibrium. The light source and the initial concentration exerted significant influence on ammonia(P<0.05). By dealing with low concentration ammonia(50 mg/L) under xenon lamp light, the degradation of the titanium dioxide P25 reached its optimum degradation rate 95%. [Conclusion] Using the sand core plate used as carrier is decided in favour of the stability of light catalytic activity. The itanium Dioxide P25 had the photocatalytic degradation efficiency on ammonia, but its degradation effect influenced by reaction time, initial concentration of gases and the different light sources.

Key words: titanium dioxide P25, ammonia, photocatalysis, degradation efficiency, sand core plate

中图分类号: 

  • TQ426.4