无模板剂的溶胶-水热法合成具有可见光响应的氮掺杂混晶TiO_2(锐钛矿/金红石/板钛矿)纳米棒束（英文）
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摘要
采用无模板剂的溶胶-水热法制备了具有可见光响应的N掺杂锐钛矿/金红石/板钛矿型TiO_2(N-TiO_2)纳米棒束,并利用X射线衍射(XRD)、透射电镜(TEM)、紫外-可见光漫反射光谱(UV-Vis DRS)、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)等手段对获得的样品进行了表征。以甲基橙为模型反应物,评价了N-TiO_2纳米棒束的光催化活性。表征结果结合光催化活性评价结果显示,与P25-TiO_2相比,N掺杂、混晶及纳米棒束之间的协同作用是所制备的混晶N-TiO_2纳米棒束具有良好光催化活性的主要原因,并对混晶N-TiO_2纳米棒束光催化降解甲基橙的机理进行了探讨。
Nitrogen doped anatase/rutile/brookite titanium dioxide(N-TiO_2) regular nano-rod bundle photocatalyst for improving visible light photocatalytic activity was prepared through a template-free sol-hydrothermal method. The properties of the materials were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), ultraviolet-visible diffuse reflectance spectra(UV-Vis DRS), Fourier transform infrared(FTIR) spectroscopy and X-ray photoelectron spectroscopy(XPS). Photocatalytic degradation of methyl orange(MO) in an aqueous solution under visible light irradiation was used as a probe reaction to evaluate the photocatalytic activity of the mixed-phase N-TiO_2 nano-rod bundle. The results of characterization combined with photocatalytic activity of MO photodegradation show that the synergistic effects among N doping, mixed-phase and nano-rod bundle structure are the main reasons to improve photocatalytic activity of mixed-phase N-TiO_2 nano-rod bundle compared with P25-TiO_2. The possible mechanism of MO degradation by mixed phase N-TiO_2 nano-rod bundle photocatalyst was preliminarily discussed.
Nitrogen doped anatase/rutile/brookite titanium dioxide(N-TiO_2) regular nano-rod bundle photocatalyst for improving visible light photocatalytic activity was prepared through a template-free sol-hydrothermal method. The properties of the materials were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), ultraviolet-visible diffuse reflectance spectra(UV-Vis DRS), Fourier transform infrared(FTIR) spectroscopy and X-ray photoelectron spectroscopy(XPS). Photocatalytic degradation of methyl orange(MO) in an aqueous solution under visible light irradiation was used as a probe reaction to evaluate the photocatalytic activity of the mixed-phase N-TiO_2 nano-rod bundle. The results of characterization combined with photocatalytic activity of MO photodegradation show that the synergistic effects among N doping, mixed-phase and nano-rod bundle structure are the main reasons to improve photocatalytic activity of mixed-phase N-TiO_2 nano-rod bundle compared with P25-TiO_2. The possible mechanism of MO degradation by mixed phase N-TiO_2 nano-rod bundle photocatalyst was preliminarily discussed.
引文
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30 Yang N,Zhai J,Wang D et al.ACS Nano[J],2010,4(2):887
31 Li G,Dimitrijevic N M,Chen L et al.Journal of the American Chemical Society[J],2008,130(16):5402
2 Radoi?i?M B,Jankovi?I A,Despotovi?V N et al.Applied Catalysis B:Environmental[J],2013,138-139(14):122
3 Zhang Chunyong,Li Mingshi,Lu Mohong et al.Rare Metal Materials and Engineering[J],2017,46(2):0322(in Chinese)
4 Xu H,Ouyang S,Liu L et al.Journal of Materials Chemistry A[J],2014,2(32):12642
5 Valentin C D,Finazzi E,Pacchioni G et al.Chemical Physics[J],2007,339(1-3):44
6 Gupta S M,Tripathi M.Chinese Science Bulletin[J],2011,56(16):1639
7 Pan L,Zou J J,Wang S et al.Applied Surface Science[J],2013,268(3):252
8 Diwald O,Thompson T L,Zubkov T et al.The Journal of Physical Chemistry B[J],2004,108:6004
9 Nolan N T,Synnott D W,Seery M K et al.Journal of Hazardous Materials[J],2012,211-212(2):88
10 Liao Y,Que W,Jia Q et al.Journal of Materials Chemistry[J],2012,22(16):7937
11 Jung K Y,Park S B,Jang H D.Catalysis Communications[J],2004,5(9):491
12 Li H,Shen X,Liu Y et al.Journal of Alloys and Compounds[J],2015,646:380
13 Gai L,Duan X,Jiang H et al.Cryst Eng Comm[J],2012,14:7662
14 Tian G,Chen Y,Zhou W et al.Cryst Eng Comm[J],2011,13(8):2994
15 Gomathi Devi L,Eraiah Rajashekhar K.Journal of Sol-Gel Science and Technology[J],2011,60(2):144
16 Bakar S A,Byzynski G,Ribeiro C.Journal of Alloys and Compounds[J],2016,666(5):38
17 Mohamed M A,Salleh W N W,Jaafar J et al.Materials Chemistry and Physics[J],2015,162(15):113
18 Dunnill C W H,Aiken Z A,Pratten J et al.Journal of Photochemistry&Photobiology A Chemistry[J],2009,207(2-3):244
19 Wadhwa S,Mathur A,Hamilton J W J et al.Advanced Science,Engineering and Medicine[J],2015,7:1
20 Xu X,Song W.Materials Technology[J],2017,32(1):52
21 Zhang Q,Shan A,Wang D et al.Journal of Sol-Gel Science and Technology[J],2013,65(2):204
22 Mamulova Kutlakova K,Tokarsky J,Kovar P et al.Journal of Hazardous Materials[J],2011,188(1-3):212
23 Zhang L,Tse M S,Tan O K et al.Journal of Materials Chemistry A[J],2013,1(14):4497
24 Yang M Q,Zhang Y,Zhang N et al.Scientific Reports[J],2013,3:3314
25 Michael-Kordatou I,Iacovou M,Frontistis Z et al.Water Research[J],2015,85:346
26 Hao R,Wang G,Tang H et al.Applied Catalysis B:Environmental[J],2016,187:47
27 Dong G,Ho W,Li Y et al.Applied Catalysis B:Environmental[J],2015,174-175:477
28 Xu H,Zhang L.Journal of Physical Chemistry C[J],2009,113(5):1785
29 Zachariah A,Baiju K V,Shukla S et al.Journal of Physical Chemistry C[J],2008,112(30):11345
30 Yang N,Zhai J,Wang D et al.ACS Nano[J],2010,4(2):887
31 Li G,Dimitrijevic N M,Chen L et al.Journal of the American Chemical Society[J],2008,130(16):5402