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Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction
นักวิจัย : Fang, Jun , Cao, Shao-Wen , Wang, Zheng , Mohammad Mehdi Shahjamali , Loo, Say Chye Joachim , Barberand, James , Xue, Can
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Fang, J., Cao, S. W., Wang, Z., Mohammad, M. S., Loo, S. C. J., Barberand, J. et al. (2012). Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction. International journal of hydrogen energy. 37(23), 17853–17861. , http://hdl.handle.net/10220/9989 , http://dx.doi.org/10.1016/j.ijhydene.2012.09.023 , 172849
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : International journal of hydrogen energy
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

The mesoporous Au-TiO2 nanocomposites with different Au concentrations were prepared via a co-polymer assisted sol-gel method. The structures have been characterized by powder X-Ray diffraction, N2 adsorption-desorption isotherms, diffuse reflectance UV-Vis spectroscopy, X-ray photoemission spectroscopy, transmission electron microscopy. Most generated Au nanoparticles were embedded in the mesoporous TiO2 matrix. The prepared Au-TiO2 nanocomposites exhibit remarkable visible-light activity for H2 evolution from photocatalytic water reduction in the presence of ascorbic acid as the electron donor. By comparing with Pt-TiO2 samples, we found that the visible-light activity of the Au-TiO2 nanocomposites could be partially contributed by the defects/impurity states in the TiO2 matrix, while the gold surface plasmons could significantly enhance the weak visible-light excitation of TiO2 matrix. In addition, further studies by controlling irradiation wavelengths suggest that some plasmon-excited electrons could transfer from Au nanoparticles to the contacting TiO2 to reduce water for H2 generation. We believe that these Au-TiO2 nanocomposites as well as the mechanistic studies would have considerable impact on future development of metal-semiconductor hybrid photocatalysts for efficient solar hydrogen production.

NRF (Natl Research Foundation, S’pore)

MOE (Min. of Education, S’pore)

บรรณานุกรม :
Fang, Jun , Cao, Shao-Wen , Wang, Zheng , Mohammad Mehdi Shahjamali , Loo, Say Chye Joachim , Barberand, James , Xue, Can . (2555). Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Fang, Jun , Cao, Shao-Wen , Wang, Zheng , Mohammad Mehdi Shahjamali , Loo, Say Chye Joachim , Barberand, James , Xue, Can . 2555. "Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Fang, Jun , Cao, Shao-Wen , Wang, Zheng , Mohammad Mehdi Shahjamali , Loo, Say Chye Joachim , Barberand, James , Xue, Can . "Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Fang, Jun , Cao, Shao-Wen , Wang, Zheng , Mohammad Mehdi Shahjamali , Loo, Say Chye Joachim , Barberand, James , Xue, Can . Mesoporous plasmonic Au-TiO2 nanocomposites for efficient visible-light-driven photocatalytic water reduction. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.