Journal
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
Volume 137, Issue 3, Pages 171-176Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)EE.1943-7870.0000311
Keywords
Nano-TiO2; Nitrogen and nickel codoping; Sol-gol; CO2 reduction; Methanol
Funding
- Office of Higher Education in Shannxi Province [08JK451]
- Research Fund for the Doctoral Program of Higher Education [20096101110013]
- NWU [09YJC24]
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Nitrogen and nickel codoped nanotitania (N-Ni/TiO2) photocatalysts for producing methanol by photocatalytic reduction of CO2 were prepared by an improved sol-gol method. The catalysts were characterized by XRD, HRTEM, DES, FTIR, TG-DSC, and UV-Vis, respectively. The experimental results indicated that nano-N-Ni/TiO2 had better properties than the pure nanotitania (TiO2), N doped titania (N/TiO2), and Ni2+ doped titania (Ni/TiO2), considering their performance of photoresponse and photocatalytic reduction of CO2. The methanol yield could reach 482.0 mu mol/g-cat under optimal conditions. Additionally, the synergetic effect of N and Ni2+ on nano-TiO2 in photocatalytic reduction of CO2 was explained, and the mechanism of photocatalytic reduction CO2 on N-Ni/TiO2 catalyst was proposed. DOI: 10.1061/(ASCE)EE.1943-7870.0000311. (C) 2011 American Society of Civil Engineers.
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