改性TiO_2的光催化性能及其在甲醛净化中的应用
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摘要
采用溶胶-凝胶法制备掺杂二氧化钛光催化剂,通过XRD、SEM、TEM等技术对其进行表征.以甲醛为模拟污染物,考察催化剂的光催化活性,探讨不同甲醛浓度和不同黏结剂对光催化效率的影响.结果表明:(1)紫外灯下,甲醛的初始浓度越高,其3 h降解效率就越高;(2)用海藻酸钠作为黏结剂,既能使甲醛的降解效率达到最高,还能达到较好的黏结效果.
The doped TiO_2 photocatalyst was prepared by the sol-gel method and characterized by the XRD,SEM and TEM techniques. The photocatalytic activity of the catalyst was investigated by using the formaldehyde as the simulated pollutant. And the effect of different formaldehyde concentration and different binders on photocatalytic efficiency was investigated at the same time. The results showed that:(1)The higher of the initial concentrations of formaldehyde were,the higher of the degradation efficiencies were after 3 hour under UV light.(2)By using the sodium alginate as the binder,the degradation efficiency of formaldehyde could be reached to the highest and a good bonding effect could be achieved.
The doped TiO_2 photocatalyst was prepared by the sol-gel method and characterized by the XRD,SEM and TEM techniques. The photocatalytic activity of the catalyst was investigated by using the formaldehyde as the simulated pollutant. And the effect of different formaldehyde concentration and different binders on photocatalytic efficiency was investigated at the same time. The results showed that:(1)The higher of the initial concentrations of formaldehyde were,the higher of the degradation efficiencies were after 3 hour under UV light.(2)By using the sodium alginate as the binder,the degradation efficiency of formaldehyde could be reached to the highest and a good bonding effect could be achieved.
引文
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[2]李玉华.光催化氧化降解室内空气甲醛性能及数值模拟[D].哈尔滨:哈尔滨工业大学,2007.
[3]江涛,张双保.我国室内甲醛污染现状及其防治措施[J].林业科技情报,2009,41(1):92-94.
[4]韩愈.室内甲醛污染与防治对策探究[J].科技信息,2014(7):262-263.
[5]王晓艳.光催化空气净化器的设计及甲醛降解的实验研究[D].重庆:重庆大学,2014.
[6]吴泳,张辉,刘明兴,等.几种空气净化技术对室内甲醛污染净化效果对比研究[J].现代预防医学,2007,34(4):754-756.
[7]柳思明,苏海佳.纳米Ti O2/活性炭复合光催化剂的制备及其对甲醛气体降解[J].环境工程学报,2012,6(9):3229-3232.
[8]王珺婷,张高科,邓放.室内光催化氧化净化设备研究进展[J].国外建材科技,2005,279(5):41-45.
[9]张洋.纳米二氧化钛降解空气污染物的研究[D].郑州:河南工业大学,2015.
[10]朱遂一,霍明昕,张蕾蕾,等.氟掺杂纳米二氧化钛制备及其光催化性能研究进展[J].科技导报,2010,28(6):112-115.
[11]谭敏.稀土掺杂纳米Ti O2薄膜光催化特性研究[D].长沙:中南大学,2010.
[12]章少华.二氧化钛光催化薄膜的制备与表征研究[D].南昌:南昌大学,2008.
[13]叶国梁.二氧化钛的制备、表征及光催化降解甲醛的活性研究[D].厦门:厦门大学,2009.
[14]杨璐,张辉.棉织物水热法纳米二氧化钛表面改性[J].西安工程大学学报,2011,25(2):154-158.
[15]王振华.掺杂改性纳米Ti O2光催化剂的制备、表征及光催化活性的研究[D].济南:山东大学,2010.
[16]郭璐瑶.纳米二氧化钛分散及表面改性的研究[D].上海:东华大学,2015.
[17]赵桂芳.室内甲醛的光催化治理及空气净化器的设计[D].大连:大连理工大学,2007.
[18]于浩.二氧化钛薄膜光催化降解典型室内空气污染物的研究[D].秦皇岛:燕山大学,2012.
[19]凌晖,周桂萍.新装修住宅室内空气甲醛污染调查分析[J].广州化工,2015,43(13):136-137,175.
[20]廖振华,陈建军,姚可夫,等.纳米Ti O2光催化剂负载化的研究进展[J].无机材料学报,2004,19(1):17-24.
[21]鄂磊,徐明霞,汪成建.固载粘结剂对二氧化钦光催化性能的影响[J].硅酸盐学报,2002(30):36-38.