以三聚氰胺为掺杂源,采用溶胶-凝胶法制得了平均粒径为20.1nm的锐钛矿型N、C共掺TiO2光催化剂.当n(N)∶n(C)∶n(Ti)为0.064∶0.055∶1时,TiO2对亚甲基蓝3h日光降解率可达68%.探讨了三聚氰胺的用量和煅烧温度对TiO2光催化性能的影响,确定了最佳制备工艺.XPS和FTIR分析表明,N主要以替代O的形式生成O-Ti-N,少量N以填隙式生成-Ti-N-O,而C主要以替位式生成O-Ti-C,以填隙式生成-Ti-C-O、-Ti- COOO.UV-Vis分析表明,N、C掺杂TiO2的吸收边从掺杂前的383nm红移到427nm,禁带宽度从掺杂前的3.2eV降到2.9eV,将TiO2的光响应波长拓展到了可见光区.
参考文献
[1] | Fujishima A;Honda K .Electrochemical photolysis of water at a semiconducting n-type TiO2 electrode[J].Nature,1972,238:37. |
[2] | Asahi R;Morikawa T .Visible-light photocatalysis in nitrogen-doped titanium oxides[J].Science,2001,293:269. |
[3] | Sato S .Photocatalytic activity of NO-doped TiO2 in the visible light region[J].Chemical Physics Letters,1986,123(1-2):126. |
[4] | Noda H;Oikawa K;Ogata T .Preparation of titanium oxi-des and its characterization[J].Chem Soc Japan,1986,59(08):1084. |
[5] | 程萍,顾明元,金燕苹.TiO2光催化剂可见光化研究进展[J].化学进展,2005(01):8-14. |
[6] | Clemens Burda;Yongbing Lou;Xiaobo Chen;Anna C. S. Samia;John Stout;James L. Gole .Enhanced Nitrogen Doping in TiO_2 Nanoparticles[J].Nano letters,2003(8):1049-1051. |
[7] | T.Ihara;M.Miyoshi;Y.Iriyama;O.Matsumoto;S.Sugihara .Visible-light-active titanium oxide photocatalyst realized by an oxygen-deficient structure and by nitrogen doping[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2003(4):403-409. |
[8] | Nakamura R;Tanaka T;Nakato Y .Mechanism for visible light response in anodic photocurrents at N-doped TiO2 film electrodes[J].Journal of Physical Chemistry B,2004,108(30):10617. |
[9] | Kosowska B;Mozia S;Morawski AW;Grzmil B;Janus M;Kalucki K .The preparation of TiO2-nitrogen doped by calcination of TiO2 center dot xH(2)O under ammonia atmosphere for visible light photocatalysis[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2005(3):269-280. |
[10] | Yin S;Ihara K;Komatsu M;Zhang QW;Saito F;Kyotani T;Sato T .Low temperature synthesis of TiO2-xNy powders and films with visible light responsive photocatalytic activity[J].Solid State Communications,2006(3):132-137. |
[11] | Sathish M;Viswanathan B;Viswanath RP .Characterization and photocatalytic activity of N-doped TiO2 prepared by thermal decomposition of Ti-melamine complex[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):307-312. |
[12] | Jirapat Ananpattarachai;Puangrat Kajitvichyanukul;Supapan Seraphin .Visible light absorption ability and photocatalytic oxidation activity of various interstitial N-doped TiO_2 prepared from different nitrogen dopants[J].Journal of hazardous materials,2009(1):163-167. |
[13] | Li YZ;Hwang DS;Lee NH;Kim SJ .Synthesis and characterization of carbon-doped titania as an artificial solar light sensitive photocatalyst[J].Chemical Physics Letters,2005(1/3):25-29. |
[14] | Hiroshi Irie;Yuka Watanabe;Kazuhito Hashimoto .Carbon-doped Anatase TiO_2 Powders as a Visible-light Sensitive Photocatalyst[J].Chemistry Letters,2003(8):772-773. |
[15] | Khan S U M;Al-Shahry M;Ingler Jr W B .Efficient photochemical water splitting by a chemically modified n-TiO2 ingler[J].Science,2002,297:2243. |
[16] | Shanmugasundaram Sakthivel;Horst Kisch .Daylight Photocatalysis by Carbon-Modified Titanium Dioxide[J].Angewandte Chemie,2003(40):4908-4911. |
[17] | 罗琼,李前树.钛,锆和铪羰基化合物M(CO)n(M=Ti,Zr,Hf;n=4~7)的理论研究[J].分子科学学报,2009(01):23-26. |
[18] | Michalow K A;Logvinovich D;Weidenkaff A et al.Synthesis,characterization and electronic structure of nitrogen-doped TiO2 nanopowder[J].Catalysis Today,2009,144:7. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%