石墨烯杂化钛酸管复合光催化剂的制备与表征

摘要/Abstract

摘要：

以化学法还原的石墨烯和纳米TiO2为原料，采用水热法制备出一系列具有良好可见光活性的石墨烯钛酸管复合光催化剂，并研究石墨烯含量和水热温度对其光催化性能的影响.结果表明：当石墨烯质量分数为5%时，复合光催化剂的催化活性最佳；采用较低水热温度制备出的复合光催化剂具有更大的比表面积和更优异的催化性能，其比表面积为一般石墨烯TiO2复合光催化剂的10倍；在可见光照射条件下，其降解罗丹明B的速率常数可达8.76×10-2 min-1，远高于文献报道的TiO2类光催化剂降解的速率常数；其可见光活性来源于石墨烯的敏化作用.

关键词: 石墨烯, 钛酸管, 可见光活性, 光催化剂

Abstract:

A series of composite photocatalysts were prepared under hydrothermal conditions by using chemical reduced graphene and nanoscale TiO2 as raw materials. The influences of graphene content and hydrothermal temperature were studied. The 5%(mass fraction) graphene contented photocatalyst possesses the best photoactivity. The catalyst prepared at lower hydrothermal temperature has a larger BET surface area and better catalytic performance. The BET surface area of the prepared composite photocatalyst is 10 times larger than that of previously reported graphene-TiO2 photocatalysts. The rate constant of degrading Rhodamine-B reaches 8.76×10-2 min-1, which is at least 5 times faster than that of reported TiO2-based photocatalysts. Based on the results of UV-vis diffuse reflection spectra and XPS, the visible-light responses of the prepared photocatalysts are originated from the sensitization of graphene.

Key words: graphene, titanate nanotubes, visiblelight response, photocatalyst

中图分类号:

O 643.36

翟茜茜，胡国新，唐波. 石墨烯杂化钛酸管复合光催化剂的制备与表征[J]. 上海交通大学学报（自然版）, 2013, 47(05): 811-816.

ZHAI Qianqian,HU Guoxin,TANG Bo. Graphene Modified Titanate Nanotubes Composite Photocatalyst: Preparation and Characterization[J]. Journal of Shanghai Jiaotong University, 2013, 47(05): 811-816.

参考文献

［1］江泽民. 对中国能源问题的思考［J］. 上海交通大学学报, 2008, 42(3): 345359.

JIANG Zemin. Reflections on energy issues in China ［J］. Journal of Shanghai Jiaotong University, 2008, 42(3): 345359.

［2］Maeda K, Teramura K, Lu D, et al. Photocatalyst releasing hydrogen from water ［J］. Nature, 2006, 440: 295.

［3］Peng Y P, Lo S L, Ou H H. Microwaveassisted hydrothermal synthesis of Ndoped titanate nanotubes for visiblelightresponsive photocatalysis ［J］. J Hazard Mater, 2010, 183(13): 754758.

［4］Sakthivel S, Kisch H. Daylight photocatalysis by carbonmodified titanium dioxide ［J］. Angew Chem Int Ed, 2003, 42(40): 49084911.

［5］Subramanian V, Wolf E, Kamat P V. Catalysis with TiO2/gold nanocomposites effect of metal particle size on the fermi level equilibration ［J］. J Am Chem Soc, 2004, 126(15): 49434950.

［6］Wang Z Y, Chen C, Wu F Q, et al. Photodegradation of Rhodamine B under visible light by bimetal codoped TiO2 nanocrystals ［J］. J Hazard Mater, 2009, 164(23): 615620.

［7］Kowalska E, Remita H, Colbeau J C, et al. Modification of titanium dioxide with platinum ions and clusters: Application in photocatalysis ［J］. J Phys Chem C, 2008, 112(4): 11241131.

［8］Hummers W S, Offeman R E. Preparation of graphitic oxide ［J］. J Am Chem Soc, 1958, 80(6): 1339.

［9］Zhang W L, Li Y, Wang C, et al. Kinetics of heterogenepus photocatalytic degradation of Rhodamine B by TiO2coated activated carbon: Role of TiO2 content and light intensity ［J］. Desalination, 2011, 266(13): 4045.

［10］Pang Y L, Bhatia S, Abdullah A Z. Process behavior of TiO2 nanotubeenhanced sonocatalytic degradation of Rhodamine B in aqueous solution ［J］. Separation and Purification Technology, 2011, 77(3): 331338.

［11］Chen C, Long M C, Zeng H, et al. Preparation, characterization and visiblelight activity of carbon modified TiO2 with two kinds of carbonaceous species ［J］. J Mole Catal A Chem, 2009, 314(12): 3541.

［12］Zhang X Y, Li P, Cui X L, et al. Graphene/TiO2 nanocomposites: Synthesis, characterization and application in hydrogen evolution from water photocatalytic splitting ［J］. J Mater Chem, 2010, 20: 28012806.

［13］Zhang H, Lü X J, Li M, et al. P25graphene composite as a high performance photocatalyst ［J］. Acs Nano, 2010, 4(1): 380386.

［14］Wu D, Chen Y F, Liu J, et al. Preparation and structure analysis of titanium oxide nanotubes ［J］. Appl Phys Lett, 2005, 87(22): 112501112503.

［15］Zhang L W, Fu H B, Zhu Y F. Efficient TiO2 photocatalysts from surface hybridization of TiO2 particles with graphitelike carbon ［J］. Adv Funct Mater, 2008, 18(15): 21802189.

［16］Wang D H, Choi D W, Li J. Selfassembled TiO2graphene hybrid nanostructures for enhanced Liion insertion ［J］. Acs Nano, 2009, 3(4): 907914.

［17］Xiao Q, Zhang J, Xiao C, et al. Solar photocatalytic degradation of methylene blue in carbondoped TiO2 nanoparticles suspension ［J］. Solar Energy, 2008, 82(8): 706713.

［18］Li F B, Hou M F, Cheah K W, et al. Enhanced photocatalytic activity of Ce3+TiO2 for 2mercaptobenzothiazole degradation in aqueous suspension for odour control ［J］. Appl Catal A Gen, 2005, 285(12): 181189.

[1]	吴靖, 谭海云, 史宇超, 侯伟宏, 汤明. 基于石墨烯和氮化硼的高性能电容器[J]. 上海交通大学学报, 2022, 56(10): 1325-1333.
[2]	尹念，张执南. 石墨烯台阶处摩擦特性的分子动力学模拟[J]. 上海交通大学学报（自然版）, 2018, 52(5): 620-623.
[3]	唐旻，吴林晟，李晓春，毛军发. 集成电路碳纳米管互连建模与特性研究[J]. 上海交通大学学报（自然版）, 2018, 52(10): 1135-1141.