Preparation,characterization and humidity sensing properties of a polyoxometalate/g-C3N4 nanomaterial
By using electrostatic adsorption method,a series of polyoxometalate/g-C3N4 nanomaterials with the different proportions were fabricated by loading Anderson-type polyoxometalate Na6[TeMo6O24]·4H2O(for short TeMo6)on the surface of g-C3N4,and they were analyzed by means of scanning electron microscopy,Fourier infrared spectroscopy,X-ray powder diffraction,and so on.Then,by simple drop coating method,their humidity sensing properties were tested and studied in detail.The comparison results show that 4%TeMo6/g-C3N4 humidity nano-sensor can respond quickly to high humidity environment.The response time and recovery time of 4%TeMo6/g-C3N4 humidity nanosensor are around 2 s at 75%-95%relative humidity(RH),which provides a promising method to develop polyoxometalate-derived high-performance humidity sensors.
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