Fabrication and photocatalytic ability of an Au/TiO₂/reduced graphene oxide nanocomposite

Abstract

Deposition Au nanoparticles on both TiO₂ and RGO to fabricate Au/TiO₂/RGO.

Au/TiO₂/RGO displayed a high H₂O₂ and •OH production in photocatalytic process.

RGO is a good collector to transfer electrons from TiO₂ to Au.

A new type of Au/TiO₂/reduced graphene oxide (RGO) nanocomposite was fabricated by the hydrothermal synthesis of TiO₂ on graphene oxide followed by the photodeposition of Au nanoparticles. Transmission electron microscopy images showed that Au nanoparticles were loaded onto the surface of both TiO₂ and RGO. Au/TiO₂/RGO had a better photocatalytic activity than Au/TiO₂ for the degradation of phenol. Electrochemical measurements indicated that Au/TiO₂/RGO had an improved charge transfer capability. Meanwhile, chemiluminescent analysis and electron spin resonance spectroscopy revealed that Au/TiO₂/RGO displayed high production of hydrogen peroxide and hydroxyl radicals in the photocatalytic process. This high photocatalytic performance was achieved via the addition of RGO in Au/TiO₂/RGO, where RGO served not only as a catalyst support to provide more sites for the deposition of Au nanoparticles but also as a collector to accept electrons from TiO₂ to effectively reduce photogenerated charge recombination.

Graphical abstract

Keywords

Reduced graphene oxide / Au / TiO ₂ / Nanocomposite / Photocatalysis

References

[1] Hoffmann M R, Martin  S T, Choi  W, Bahnemannt D W . Environmental applications of semiconductor photocatalysis. Chemical Reviews, 1995, 95(1): 69–96

[2] Nakata K, Fujishima  A. TiO₂ photocatalysis: design and applications. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 2012, 13(3): 169–189

[3] Wang H, Quan  X, Yu H T ,  Chen S. Fabrication of a TiO₂/carbon nanowall heterojunction and its photocatalytic ability. Carbon, 2008, 46(8): 1126–1132

[4] Hashimoto K, Irie  H, Fujishima A . TiO₂ photocatalysis: a historical overview and future prospects. Japanese Journal of Applied Physics, 2005, 44(12): 8269–8285

[5] Mor G K, Shankar  K, Paulose M ,  Varghese O K ,  Grimes C A . Use of highly-ordered TiO₂ nanotube arrays in dye-sensitized solar cells. Nano Letters, 2006, 6(2): 215–218

[6] Ge M, Guo  C, Zhu X ,  Ma L, Han  Z, Hu W ,  Wang Y. Photocatalytic degradation of methyl orange using ZnO/TiO₂ composites. Frontiers of Environmental Science & Engineering, 2009, 3(3): 271–280

[7] Wang S, Wang  K, Jehng J ,  Liu L. Preparation of TiO₂/MCM-41 by plasma enhanced chemical vapor deposition method and its photocatalytic activity. Frontiers of Environmental Science & Engineering, 2012, 6(3): 304–312

[8] Tian Y, Tatsuma  T. Mechanisms and applications of plasmon-induced charge separation at TiO₂ films loaded with gold nanoparticles. Journal of the American Chemical Society, 2005, 127(20): 7632–7637

[9] Méndez-Medrano M G ,  Kowalska E ,  Lehoux A ,  Herissan A ,  Ohtani B ,  Rau S, Colbeau-Justin  C, Rodríguez-López  J L, Remita  H. Surface modification of TiO₂ with Au nanoclusters for efficient water treatment and hydrogen generation under visible light. Journal of Physical Chemistry C, 2016, 120(43): 25010–25022

[10] Gołąbiewska A ,  Malankowska A ,  Jarek M ,  Lisowski W ,  Nowaczyk G ,  Jurga S ,  Zaleska-Medynska A . The effect of gold shape and size on the properties and visible light-induced photoactivity of Au-TiO₂. Applied Catalysis B: Environmental, 2016, 196: 27–40

[11] Stankovich S, Dikin  D A, Dommett  G H B, Kohlhaas  K M, Zimney  E J, Stach  E A, Piner  R D, Nguyen  S T, Ruoff  R S. Graphene-based composite materials. Nature, 2006, 442(7100): 282–286

[12] Perreault F, Fonseca de Faria  A, Elimelech M . Environmental applications of graphene-based nanomaterials. Chemical Society Reviews, 2015, 44(16): 5861–5896

[13] Zhang N, Yang  M Q, Liu  S, Sun Y ,  Xu Y J . Waltzing with the versatile platform of graphene to synthesize composite photocatalysts. Chemical Reviews, 2015, 115(18): 10307–10377

[14] Zhang H, Lv  X, Li Y ,  Wang Y, Li  J. P25-graphene composite as a high performance photocatalyst. ACS Nano, 2010, 4(1): 380–386

[15] Zhang N, Zhang  Y, Xu Y J . Recent progress on graphene-based photocatalysts: current status and future perspectives. Nanoscale, 2012, 4(19): 5792–5813

[16] Tu W, Zhou  Y, Zou Z . Versatile graphene-promoting photocatalytic performance of semiconductors: Basic principles, synthesis, solar energy conversion, and environmental applications. Advanced Functional Materials, 2013, 23(40): 4996–5008

[17] Xiang Q, Yu  J, Jaroniec M . Synergetic effect of MoS₂ and graphene as cocatalysts for enhanced photocatalytic H₂ production activity of TiO₂ nanoparticles. Journal of the American Chemical Society, 2012, 134(15): 6575–6578

[18] Liu Y, Yu  H, Wang H ,  Chen S, Quan  X, Efficient H . 2 production over Au/graphene/TiO₂ induced by surface plasmon resonance of Au and band-gap excitation of TiO₂. Materials Research Bulletin, 2014, 59: 111–116

[19] Yuan J, Shiller  A M. Determination of subnanomolar levels of hydrogen peroxide in seawater by reagent-injection chemiluminescence detection. Analytical Chemistry, 1999, 71(10): 1975–1980

[20] Wang H, Zhang  X, Su Y ,  Yu H, Chen  S, Quan X ,  Yang F. Photoelectrocatalytic oxidation of aqueous ammonia using TiO₂ nanotube arrays. Applied Surface Science, 2014, 311: 851–857

[21] Kotal M, Bhowmick  A K. Multifunctional hybrid materials based on carbon nanotube chemically bonded to reduced graphene oxide. Journal of Physical Chemistry C, 2013, 117(48): 25865–25875

[22] Wang H, Su  Y, Zhao H ,  Yu H, Chen  S, Zhang Y ,  Quan X. Photocatalytic oxidation of aqueous ammonia using atomic single layer graphitic-C₃N₄. Environmental Science & Technology, 2014, 48(20): 11984–11990

[23] Yu H, Ma  B, Chen S ,  Zhao Q, Quan  X, Afzal S . Electrocatalytic debromination of BDE-47 at palladized graphene electrode. Frontiers of Environmental Science & Engineering, 2014, 8(2): 180–187

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