Influence of calcination temperature and solvent of titanium precursor on the photocatalytic activity of N-doped $$\hbox {TiO}_2$$TiO2 nanoparticles in $$\hbox {H}_2$$H2 evolution under visible radiation

Maryam Taherinia, Mohammad Nasiri (), Ebrahim Abedini and Hamid Reza Pouretedal
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Maryam Taherinia: Malek-Ashtar University of Technology
Mohammad Nasiri: Malek-Ashtar University of Technology
Ebrahim Abedini: Malek-Ashtar University of Technology
Hamid Reza Pouretedal: Malek-Ashtar University of Technology

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2019, vol. 21, issue 4, No 21, 1963-1975

Abstract: Abstract In this research, the effect of calcination temperature and solvent of titanium precursor were studied on the photocatalytic activity of N-doped $$\hbox {TiO}_2$$TiO2 nanoparticles used in $$\hbox {H}_2$$H2 evolution under the normal sunlight. A modified sol–gel method was used to improve the surface properties of prepared nanoparticles by using acetic acid and/or ethanol as solvent of titanium precursor. The nanoparticles of $$\hbox {TiO}_2 /\hbox {N}$$TiO2/N were calcined at temperatures of 450, 550, and 650 $$\,^{\circ }\mathrm {C}$$∘C. The techniques of XRD, FT-IR, UV-DRS, TGA, SEM, and EDAX were applied to characterization of the synthesized nanoparticles. A 10% solution of methanol was used for production of $$\hbox {H}_2$$H2 gas in the presence of prepared nanoparticles as photocatalyst, and gas chromatography device was used for measurement of evolved gas. The obtained results showed that the surface reactivity of $$\hbox {TiO}_2 /\hbox {N}$$TiO2/N nanoparticles was increased when the acetic acid was used as solvent of titanium precursor. The more crystallinity of prepared $$\hbox {TiO}_2 /\hbox {N}$$TiO2/N nanoparticles in acetic acid solvent was proposed for this result. Also, the photocatalytic activity of nanoparticles of $$\hbox {TiO}_2 /\hbox {N}$$TiO2/N was decreased with increase in temperature of calcination process. This result was related to the agglomeration of nanoparticles and thus decrease in their surface area with increase in calcination temperature.

Keywords: $$\hbox {TiO}_2$$ TiO 2 nanoparticle; Photocatalyst; $$\hbox {H}_2$$ H 2; Solar light; N-doped (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s10668-018-0114-2

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