纳米TiO_2的低温制备及光催化降解有机磷农药
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摘要
以TiCl4为钛源,苯甲醇、叔丁醇或异丙醚为氧供体,采用非水溶胶凝胶法低温制备纳米TiO_2粉末。XRD、 TEM及比表面积测试结果表明:以苯甲醇为氧供体,在50℃下制备的样品具有较好的锐钛矿结晶度,比表面积为110.67 m2/g,粒径为30～50 nm。以毒死蜱和乐果为目标降解物,研究所制备的纳米TiO_2的光催化性能。以苯甲醇为氧供体制备的样品,其光催化活性与Degussa P25商品TiO_2相当,反应140 min毒死蜱和乐果的消失率分别为92.4%和75.7%,降解率分别为52.1%和42.7%。
Nano-TiO_2 powder was prepared by nonhydrolytic sol-gel method at low temperature using benzyl alcohol,tert-butyl alcohol or isopropyl ether as oxygen donor and TiCl4 as titanium source.The results of XRD,TEM and specific surface area test showed that,the sample prepared at 50 ℃ with benzyl alcohol as oxygen donor showed good anatase crystallinity,which characterized by 110.67 m2/g of specific surface area and 30-50 nm of particle size.Taking chlorpyrifos and dimethoate as objective degradation products,the photocatalytic performance of the prepared nano-TiO_2 was studied.The photocatalytic activity of the samples prepared with benzyl alcohol as oxygen donor was similar to that of the sold TiO_2 Degussa P25,the elimination rates of chlorpyrifos and dimethoate were 92.4% and 75.7% respectively after 140 min of reaction,the degradation rates were 52.1% and 42.7% respectively.
Nano-TiO_2 powder was prepared by nonhydrolytic sol-gel method at low temperature using benzyl alcohol,tert-butyl alcohol or isopropyl ether as oxygen donor and TiCl4 as titanium source.The results of XRD,TEM and specific surface area test showed that,the sample prepared at 50 ℃ with benzyl alcohol as oxygen donor showed good anatase crystallinity,which characterized by 110.67 m2/g of specific surface area and 30-50 nm of particle size.Taking chlorpyrifos and dimethoate as objective degradation products,the photocatalytic performance of the prepared nano-TiO_2 was studied.The photocatalytic activity of the samples prepared with benzyl alcohol as oxygen donor was similar to that of the sold TiO_2 Degussa P25,the elimination rates of chlorpyrifos and dimethoate were 92.4% and 75.7% respectively after 140 min of reaction,the degradation rates were 52.1% and 42.7% respectively.
引文
[1]王威,贺红武,王列平,等.有机磷农药及其研发概况[J].农药,2016,55(2):86-90.
[2]吉喜燕,刘丽春,张无敌,等.有机磷农药乐果在厌氧消化系统中降解的实验研究[J].中国沼气,2016,34(4):13-18.
[3]TSAI W T,LEE M K,SU T Y,et al.Photodegradation o bisphenol-A in a batch TiO2suspension reactor[J].J Hazard Mater2009,168(1):269-275.
[4]黄晶晶,杜军,余雁斌,等.氮掺杂对二氧化钛光催化性能的影响[J].无机盐工业,2013,45(9):58-61.
[5]王磊,夏璐,金帅,等.硫掺杂二氧化钛光催化降解曙红Y溶液的研究[J].太阳能学报,2013,34(1):131-136.
[6]宋巍巍,薛永强,苏黎宁,等.N掺杂纳米TiO2的制备及其光催化性能[J].化工进展,2012,31(5):1057-1060.
[7]郭宇,金玉家,吴红梅,等.负载型二氧化钛光催化材料的制备及其光催化性能研究[J].光谱学与光谱分析,2015,35(6):1677-1681.
[8]周兴华,段萍,罗玉萍,等.镧掺杂纳米二氧化钛光催化剂的制备及性能研究[J].材料导报,2015,29(25):1-3.
[9]汤善康,耿启金,刘刚,等.光催化降解活性染料K-GL的动力学及其盐效应[J].化工进展,2014,33(7):1908-1912.
[10]陈秋强,谢宏琴,周文,等.铈掺杂纳米二氧化钛可见光光催化降解苯酚性能[J].化工进展,2012,31(5):1043-1046.
[11]刘增超,刘吉,鲁阳,等.镧硫共掺杂纳米二氧化钛的制备及应用[J].工业用水与废水,2014,45(2):56-59.
[12]孙莉,白书立,姜庆叶,等.钆掺杂二氧化钛纳米管光催化降解制药废水[J].工业用水与废水,2013,44(1):49-53.
[13]刘占孟,桑义敏,杨润昌.纳米二氧化钛电催化氧化工艺参数的研究[J].工业用水与废水,2004,35(2):54-56.
[14]邬腊梅.掺锌纳米TiO2对毒死蜱的光催化降解研究[D].长沙:湖南农业大学,2009.
[15]陈欢欢.掺稀土纳米TiO2对毒死蜱的光催化降解研究[D].长沙:湖南农业大学,2010.
[16]刘祥英,李琼轩,柏连阳.纳米二氧化钛光催化降解毒死蜱的动力学研究[J].湖南农业大学学报,2011,37(5):551-553.
[17]刘祥英,周小毛,蔡海林.纳米TiO2光催化降解毒死蜱的影响因素研究[J].农药学学报,2011,13(4):435-438.
[18]LIU X Y,WANG L F,BAI L Y,et al.Photocatalytic degradation and intermediates characteristics of chlopyrifos bynano-TiO2[J].J Indian Chem Soc,2013,90:469-476.
[19]NIEDERBERGER M,BARTLM H,STUCKYG D.Benzyl alcohol and titanium tetrachloride-A versatile reaction system for the nonaqueous and low-temperature preparation of crystalline and luminescent titania nanoparticles[J].Chem Mater,2002,14:4364-4370.
[20]LIU T X,LI F B,LI X Z.TiO2hydrosols with high activity for photocatalytic degradation of formaldehyde in a gaseous phase[J].JHazard Mater,2008,152(1):347-355.
[2]吉喜燕,刘丽春,张无敌,等.有机磷农药乐果在厌氧消化系统中降解的实验研究[J].中国沼气,2016,34(4):13-18.
[3]TSAI W T,LEE M K,SU T Y,et al.Photodegradation o bisphenol-A in a batch TiO2suspension reactor[J].J Hazard Mater2009,168(1):269-275.
[4]黄晶晶,杜军,余雁斌,等.氮掺杂对二氧化钛光催化性能的影响[J].无机盐工业,2013,45(9):58-61.
[5]王磊,夏璐,金帅,等.硫掺杂二氧化钛光催化降解曙红Y溶液的研究[J].太阳能学报,2013,34(1):131-136.
[6]宋巍巍,薛永强,苏黎宁,等.N掺杂纳米TiO2的制备及其光催化性能[J].化工进展,2012,31(5):1057-1060.
[7]郭宇,金玉家,吴红梅,等.负载型二氧化钛光催化材料的制备及其光催化性能研究[J].光谱学与光谱分析,2015,35(6):1677-1681.
[8]周兴华,段萍,罗玉萍,等.镧掺杂纳米二氧化钛光催化剂的制备及性能研究[J].材料导报,2015,29(25):1-3.
[9]汤善康,耿启金,刘刚,等.光催化降解活性染料K-GL的动力学及其盐效应[J].化工进展,2014,33(7):1908-1912.
[10]陈秋强,谢宏琴,周文,等.铈掺杂纳米二氧化钛可见光光催化降解苯酚性能[J].化工进展,2012,31(5):1043-1046.
[11]刘增超,刘吉,鲁阳,等.镧硫共掺杂纳米二氧化钛的制备及应用[J].工业用水与废水,2014,45(2):56-59.
[12]孙莉,白书立,姜庆叶,等.钆掺杂二氧化钛纳米管光催化降解制药废水[J].工业用水与废水,2013,44(1):49-53.
[13]刘占孟,桑义敏,杨润昌.纳米二氧化钛电催化氧化工艺参数的研究[J].工业用水与废水,2004,35(2):54-56.
[14]邬腊梅.掺锌纳米TiO2对毒死蜱的光催化降解研究[D].长沙:湖南农业大学,2009.
[15]陈欢欢.掺稀土纳米TiO2对毒死蜱的光催化降解研究[D].长沙:湖南农业大学,2010.
[16]刘祥英,李琼轩,柏连阳.纳米二氧化钛光催化降解毒死蜱的动力学研究[J].湖南农业大学学报,2011,37(5):551-553.
[17]刘祥英,周小毛,蔡海林.纳米TiO2光催化降解毒死蜱的影响因素研究[J].农药学学报,2011,13(4):435-438.
[18]LIU X Y,WANG L F,BAI L Y,et al.Photocatalytic degradation and intermediates characteristics of chlopyrifos bynano-TiO2[J].J Indian Chem Soc,2013,90:469-476.
[19]NIEDERBERGER M,BARTLM H,STUCKYG D.Benzyl alcohol and titanium tetrachloride-A versatile reaction system for the nonaqueous and low-temperature preparation of crystalline and luminescent titania nanoparticles[J].Chem Mater,2002,14:4364-4370.
[20]LIU T X,LI F B,LI X Z.TiO2hydrosols with high activity for photocatalytic degradation of formaldehyde in a gaseous phase[J].JHazard Mater,2008,152(1):347-355.