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(a) The X-ray diffraction (XRD) patterns of Ta2O5 nonwoven cloth, Ta3N5 nonwoven cloth, Ta3N5-Pt nonwoven cloth and standard XRD pattern of Ta3N5 (JCPDS No. 89-5200). (b) Nitrogen adsorption–desorption isotherms of the Ta3N5 cloth and Ta3N5-Pt cloth. (c) The ultraviolet–visible diffuse reflectance spectra of Ta2O5 cloth, Ta3N5 cloth and Ta3N5-Pt cloth.
