介孔二氧化钛负载La_(1-x)Fe_xNiO_3催化剂光降解甲基橙的研究
|
摘要
本文采用溶胶凝胶法制备了粉体钙钛矿氧化物La_(1-x)Fe_xNiO_3(x=0.2,0.4,0.6,0.8)作为光催化剂,通过改变钙钛矿氧化物中掺杂元素Fe3+的比例,并将其负载到介孔二氧化钛上。通过对比钙钛矿型金属氧化物以及二氧化钛在自然光和紫外光下的催化降解甲基橙的降解率,发现介孔TiO_2负载La_(1-x)Fe_xNiO_3催化剂可有效地提高甲基橙的光降解率,相比于单独的钙钛矿型催化剂和二氧化钛催化剂,其光催化降解甲基橙的效果能提高40%。
This paper adopted sol gel of the perovskite oxide powder is prepared by the La1-xFexNiO_3(x=0.2,0.4,0.2,0.8)as for light catalyst,through changing the proportion of elements Fe3+,makes the structure of the perovskite catalyst can change,further to load it onto the mesoporous titanium dioxide,to increase the contact area of reaction.By comparing the perovskite type metal oxide and titanium dioxide in natural light and Uv light catalytic degradation of methyl orange degradation rate,found that the mesoporous TiO_2 loading La_(1-x)Fe_xNiO_3 catalyst can effectively increase the rate of photodegradation of methyl orange,compared with the single perovskite catalyst and titanium dioxide catalyst,the effects of photocatalytic degradation of methyl orange can be further increased.
This paper adopted sol gel of the perovskite oxide powder is prepared by the La1-xFexNiO_3(x=0.2,0.4,0.2,0.8)as for light catalyst,through changing the proportion of elements Fe3+,makes the structure of the perovskite catalyst can change,further to load it onto the mesoporous titanium dioxide,to increase the contact area of reaction.By comparing the perovskite type metal oxide and titanium dioxide in natural light and Uv light catalytic degradation of methyl orange degradation rate,found that the mesoporous TiO_2 loading La_(1-x)Fe_xNiO_3 catalyst can effectively increase the rate of photodegradation of methyl orange,compared with the single perovskite catalyst and titanium dioxide catalyst,the effects of photocatalytic degradation of methyl orange can be further increased.
引文
[1]谈婷婷.介孔二氧化钛复合光催化材料的制备与可见光催化性能研究[D].无锡:江南大学,2016.
[2]郭美玲.负载型TiO 2SBA-15的制备和光催化性能[D].牡丹江:牡丹江师范学院,2015.
[3]张琦.负载型二氧化钛光催化纳米复合材料的制备及性能研究[D].石河子:石河子大学,2015.
[4]郝星宇.介孔TiO2/CdS纳米复合光催化剂制备、结构调控及催化性能研究[D].太原:太原理工大学,2013.
[5]赵阳.介孔二氧化钛/活性炭的制备及其催化分解性能[D].北京:北京林业大学,2016.
[6]何秀,程宝箴,孙冬兰,等.介孔二氧化钛的制备及其光催化性能[J].天津科技大学学报,2013(6):24-27.
[7]邹菲.介孔二氧化钛分子筛的合成、表征及其机理研究[D].杭州:浙江工业大学,2013.
[8]Hong A P,Bahuemann D W,Hoffmann M R.Cobalt(Ⅱ)tetrasulfophthalo-cyanine on titanium dioxide:a new efficient electron relay for the photocatalytic formation and deplction of hydrogen penxide in equcous suspensions[J].J Phys Chem,1987,91(8):2109-2117.
[9]Litler Heterogeneous M I.Photocatalysis transition metal ions in photocatalytic systems[J].Appl Catal B:Environ,1999,23(2):89-114.
[10]Lawton S A,Theby E A.Synthesis of vanadium oxide powders by evaporative decomposition of solutions[J].Am Ceram Soc,1995,78(1):104-107.
[11]Echihana T,Matsumura M,Ono J.Effect of ethylenediamnetetraacetic acid on the photocatalytic activities and flat-band potentials of cadmium sulfide and cadmium selenide[J].Phys Chem,1990,94(1):415-418.
[12]张恒强.介孔过渡金属氧化物及多孔负载型氧化物催化活化甲烷的研究[D].上海:华东师范大学,2012.
[13]Arima T,Tokura Y,Tottance J B.Variation of optical gaps in perovskite-type 3d transition-metal oxides[J].Physical Review B,1993,48(23):17006-17009.
[14]姚静.钙钛矿型La(1-x)CexNiO 3纳米粉体的制备及光催化性能研究[D].哈尔滨:哈尔滨师范大学,2013.
[2]郭美玲.负载型TiO 2SBA-15的制备和光催化性能[D].牡丹江:牡丹江师范学院,2015.
[3]张琦.负载型二氧化钛光催化纳米复合材料的制备及性能研究[D].石河子:石河子大学,2015.
[4]郝星宇.介孔TiO2/CdS纳米复合光催化剂制备、结构调控及催化性能研究[D].太原:太原理工大学,2013.
[5]赵阳.介孔二氧化钛/活性炭的制备及其催化分解性能[D].北京:北京林业大学,2016.
[6]何秀,程宝箴,孙冬兰,等.介孔二氧化钛的制备及其光催化性能[J].天津科技大学学报,2013(6):24-27.
[7]邹菲.介孔二氧化钛分子筛的合成、表征及其机理研究[D].杭州:浙江工业大学,2013.
[8]Hong A P,Bahuemann D W,Hoffmann M R.Cobalt(Ⅱ)tetrasulfophthalo-cyanine on titanium dioxide:a new efficient electron relay for the photocatalytic formation and deplction of hydrogen penxide in equcous suspensions[J].J Phys Chem,1987,91(8):2109-2117.
[9]Litler Heterogeneous M I.Photocatalysis transition metal ions in photocatalytic systems[J].Appl Catal B:Environ,1999,23(2):89-114.
[10]Lawton S A,Theby E A.Synthesis of vanadium oxide powders by evaporative decomposition of solutions[J].Am Ceram Soc,1995,78(1):104-107.
[11]Echihana T,Matsumura M,Ono J.Effect of ethylenediamnetetraacetic acid on the photocatalytic activities and flat-band potentials of cadmium sulfide and cadmium selenide[J].Phys Chem,1990,94(1):415-418.
[12]张恒强.介孔过渡金属氧化物及多孔负载型氧化物催化活化甲烷的研究[D].上海:华东师范大学,2012.
[13]Arima T,Tokura Y,Tottance J B.Variation of optical gaps in perovskite-type 3d transition-metal oxides[J].Physical Review B,1993,48(23):17006-17009.
[14]姚静.钙钛矿型La(1-x)CexNiO 3纳米粉体的制备及光催化性能研究[D].哈尔滨:哈尔滨师范大学,2013.