Mo-N-co-doped mesoporous TiO{sub 2} microspheres with enhanced visible light photocatalytic activity

Journal Article · Fri Dec 15 04:00:00 EST 2017 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.12.041· OSTI ID:22730508

Liu, Honghong ^[1]; Gong, Hong ^[1]; Zou, Mingming ^[2]; Jiang, Heng ^[1]; Abolaji, Rasaki Sefiu; Tareen, Ayesha Khan ^[2]; Hakala, Branislav Viliam ^[2]; Yang, Minghui ^[2]

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1. School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113000 (China)
2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)

Highlights: • The Mo-N-co-doped mesoporous TiO{sub 2} microspheres were synthesized via a solvothermal method and further nitriding treatment. • The properties of TiO{sub 2} microspheres can be tuned by Mo-N-co-doping. • Photocatalytic rate is much higher than Pure TiO{sub 2} catalyst powder and Mo doped TiO{sub 2} microspheres. • The higher activity is attributed to the large BET surface area, narrow band gap and intense light absorbance in visible region. - Abstract: Mo-N-co-doped mesoporous TiO{sub 2} microspheres were synthesized via a solvothermal method, followed by nitriding treatment under ammonia gas flow. The efficiency of the samples was investigated by monitoring the degradation of Rhodamine-B under visible light irradiation. The experimental results revealed that Mo-N-co-doped mesoporous TiO{sub 2} microspheres showed better performances than Mo-TiO{sub 2} microspheres. It was observed that; 0.1% molar quantity of Mo doped on TiO{sub 2} at 500 °C for 2 h under nitriding conditions gave highest photocatalytic activities. The nitridation under ammonia gas of Mo-TiO{sub 2} samples created oxygen vacant sites and led to incorporation of substitutional and interstitial Nitrogen. The enhanced visible light photocatalytic activities of Mo-N-co-doped TiO{sub 2} photocatalyst was attributed to the large surface areas, narrow band gap and intense light absorbance in visible region. This study may create a promising and eco-friendly method towards synthesis of metal and non-metals co-doped on semiconductor materials to improve their photocatalytic activities and applications.

• OSTI ID: 22730508
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: Part 1 Vol. 96; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON MONOXIDE
DOPED MATERIALS
GAS FLOW
HYDROTHERMAL SYNTHESIS
MICROSPHERES
NANOSTRUCTURES
NITRIDATION
OXIDATION
PHOTOCATALYSIS
SEMICONDUCTOR MATERIALS
SURFACE AREA
TITANIUM OXIDES
VISIBLE RADIATION