TiO2-Au composite for efficient UV photocatalytic reduction of Cr(VI)

被引：9

作者：

Liu, Xinjuan ^{[1
]}

Lv, Tian ^{[1
]}

Liu, Yong ^{[1
]}

Pan, Likun ^{[1
]}

Sun, Zhuo ^{[1
]}

机构：

[1] E China Normal Univ, Dept Phys, Minist Educ, Engn Res Ctr Nanophoton & Adv Instrument, Shanghai 200062, Peoples R China

来源：

DESALINATION AND WATER TREATMENT | 2013年 / 51卷 / 19-21期

关键词：

TiO2; Au; Composite; Photocatalysis; MICROWAVE-ASSISTED SYNTHESIS; GOLD NANOPARTICLES; NANOCOMPOSITES; DEGRADATION; CHROMIUM; PHASE; SIZE; AU;

D O I：

10.1080/19443994.2013.781739

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

TiO2 at the nanoscale perform well in the UV photocatalytic application depending on the particle size; a combination of TiO2 and Au may improve the situation. TiO2-Au composites are thus synthesized and examined in the UV photocatalytic reduction of Cr(VI). Results show that the photocatalytic efficiency of TiO2-Au reaches 91% in Cr(VI) reduction compared with the pure TiO2 (83%) under UV light irradiation. The increased light absorption intensity in a broader spectral range as well as the rate of electron-hole pair recombination in TiO2 with the addition of Au shall be responsible for the enhanced photocatalytic ability of the composite.

引用

页码：3889 / 3895

页数：7

共 46 条

[1] Role of micro-structure and interfacial properties in the higher photocatalytic activity of TiO2-supported nanogold for methanol-assisted visible-light-induced splitting of water [J].

Awate, S. V. ;

Deshpande, S. S. ;

Rakesh, K. ;

Dhanasekaran, P. ;

Gupta, N. M. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (23) :11329-11339

[2] Modeling and optimization of voltage and treatment time for electrocoagulation removal of hexavalent chromium [J].

Bhatti, Manpreet S. ;

Reddy, Akepati S. ;

Kalia, Rajeev K. ;

Thukral, Ashwani K. .

DESALINATION, 2011, 269 (1-3) :157-162

[3] Surface-modified Phanerochaete chrysosporium as a biosorbent for Cr(VI)-contaminated wastewater [J].

Chen, Gui-Qiu ;

Zhang, Wen-Juan ;

Zeng, Guang-Ming ;

Huang, Jin-Hui ;

Wang, Liang ;

Shen, Guo-Li .

JOURNAL OF HAZARDOUS MATERIALS, 2011, 186 (2-3) :2138-2143

[4] Effects of gold nanoparticles deposition on the photocatalytic activity of titanium dioxide under visible light [J].

Dozzi, Maria Vittoria ;

Prati, Laura ;

Canton, Patrizia ;

Selli, Elena .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2009, 11 (33) :7171-7180

[5] Evaluation of Amberlite IRA96 and Dowex 1 x 8 ion-exchange resins for the removal of Cr(VI) from aqueous solution [J].

Edebali, Serpil ;

Pehlivan, Erol .

CHEMICAL ENGINEERING JOURNAL, 2010, 161 (1-2) :161-166

[6] Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

[7] Chromium removal by combining the magnetic properties of iron oxide with adsorption properties of carbon nanotubes [J].

Gupta, V. K. ;

Agarwal, Shilpi ;

Saleh, Tawfik A. .

WATER RESEARCH, 2011, 45 (06) :2207-2212

[8] Synthesis, characterization and effect of calcination temperature on phase transformation and photocatalytic activity of Cu,S-codoped TiO2 nanoparticles [J].

Hamadanian, M. ;

Reisi-Vanani, A. ;

Majedi, A. .

APPLIED SURFACE SCIENCE, 2010, 256 (06) :1837-1844

[9] Oxidation of NO in gas phase by Au-TiO2 photocatalysts prepared by the sol-gel method [J].

Hernandez-Fernandez, J. ;

Aguilar-Elguezabal, A. ;

Castillo, S. ;

Ceron-Ceron, B. ;

Arizabalo, R. D. ;

Moran-Pineda, M. .

CATALYSIS TODAY, 2009, 148 (1-2) :115-118

[10] Photocatalytic magnetic separable beads for chromium (VI) reduction [J].

Idris, Ani ;

Hassan, Nursia ;

Ismail, Nur Suriani Mohd ;

Misran, Effaliza ;

Yusof, Noordin Mohd ;

Ngomsik, Audrey-Flore ;

Bee, Agnes .

WATER RESEARCH, 2010, 44 (06) :1683-1688

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