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Enhanced photocatalytic of N/F-doped-NaTaO3 photocatalyst synthesized by hydrothermal method

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Abstract

N/F-doped NaTaO3 powders were synthesized via a hydrothermal method at 160 °C. The influences of N/F co-doping on the crystal structure, morphology and photocatalytic properties of the NaTaO3 powders were investigated systematically. Rietveld refinement of X-ray diffraction data confirm that the nanoparticles of pure NaTaO3 have orthorhombic structures with Pc21n:bca and Ta2O5 can be obtained by doping N/F molar ratio (NaOH/NH4F ≤ 1) with the orthorhombic P2 mm:cab space group. The NaTaO3 powders are transformed from orthorhombic Pc21n:bca into monoclinic P2/m:b space group with the NaOH/NH4F molar ratio (NaOH/NH4F > 1). The well-defined cubic block NaTaO3 single-crystalline particles with the size of 0.5 μm are determined using TEM and grow preferentially along (101) and (010) crystal planes. The photocatalytic activities were evaluated by the degradation of Rhodamine B under UV-light irradiation. The possible mechanism is proposed to discuss the enhanced photocatalytic activity based on the increasing separation efficiency of photoinduced charge. The results illustrate that the obtained monoclinic N/F-NaTaO3 (NaOH/NH4F = 1.5/1.0) powder exhibits the best photocatalytic activity with the UV-light irradiation for 210 min.

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Acknowledgments

This work is supported by the Project of the National Natural Science Foundation of China (Grant No. 51172135); the Academic Leaders Funding Scheme of Shaanxi University of Science and Technology (2013XSD06); the State-Level College Students’ Innovation and Entrepreneurship Training Program for Local Colleges and Universities (201310708003); the Graduate Innovation Fund of Shaanxi University of Science and Technology (SUST-A04).

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  1. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an, 710021, China

    Wei Yang, Guoqiang Tan, Huijun Ren, Ao Xia, Yangyang Luo & Lixiong Yin

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  1. Wei Yang
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Correspondence to Guoqiang Tan.

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Yang, W., Tan, G., Ren, H. et al. Enhanced photocatalytic of N/F-doped-NaTaO3 photocatalyst synthesized by hydrothermal method. J Mater Sci: Mater Electron 25, 3807–3815 (2014). https://doi.org/10.1007/s10854-014-2093-x

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