Bi2WO6/Ag heterogeneous nano structure material as well as preparation method and application thereof
A nanostructured and heterogeneous technology, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as hindering photocatalytic efficiency, and achieve photoelectric High conversion efficiency, good stability, and the effect of inhibiting longitudinal thickening
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Embodiment 1
[0039] A Bi 2 WO 6 The preparation method of / Ag heterogeneous nanostructure material comprises the following steps:
[0040] (1) 5mmol Bi(NO 3 ) 3 ·5H 2 O dissolved in 5 mL of 2M HNO 3 Solution A is formed in the solution, and then 2.5mmolNa 2 WO 4 2H 2 Dissolve O in a mixed solvent of 20mL ethanol and 15mL deionized water to form solution B, mix solutions A and B, stir and react for 5-10min, then add 5mL 1,6-hexamethylenediamine to the mixed solution, and transfer the liquid to the reaction kettle Heat at 160°C for 12 hours, then cool naturally to room temperature, collect by centrifugation, and wash three times with deionized water and absolute ethanol respectively. Then vacuum dried at 60°C for 6h to obtain Bi 2 WO 6 powder sample.
[0041] (2) Under ice bath conditions, get the Bi obtained in step (1) 2 WO 6 1mmol of powder sample was ultrasonically dispersed in 40mL of deionized water, 5mL of 6mM silver nitrate aqueous solution was added, then 5mL of acetic a...
Embodiment 2
[0045] A Bi 2 WO 6 / Ag heterogeneous nanostructures for visible light photoelectric conversion applications.
[0046] Bi prepared by the present invention 2 WO 6 / Ag heterogeneous nanostructure material 5mg is ultrasonically dispersed in 1mL deionized water, take 0.01mL of dispersed liquid droplet with an area of 0.28cm 2 on the FTO glass. Afterwards, the FTO glass was put into a drying oven and dried at 80° C. for 30 minutes. A standard three-electrode system was used for photoelectrochemical testing, with catalyst-loaded FTO glass as the working electrode, and platinum wire and Ag / AgCl electrodes as auxiliary and reference electrodes, respectively. With a concentration of 0.2M Na 2 SO 4 The solution is an electrolyte. The photoelectric conversion uses a 300W xenon lamp as the light source, passed the test of the electrochemical workstation (CHI660B), and the sweep speed is 50mV s -1 . When the initial potential is 0.2V, the transient current density changes with ...
Embodiment 3
[0048] A Bi 2 WO 6 / Ag heterogeneous nanostructure materials for visible light catalytic degradation of organic dyes.
[0049] Take 10 mg of Bi prepared above 2 WO 6 / Ag heterogeneous nanostructure materials were added into 100mL RhB solution with a concentration of 0.01mM and stirred in the dark for 1h, so that the catalyst surface reached adsorption-desorption equilibrium. Thereafter, irradiation was performed using a 300W xenon lamp. Take 3mL samples with a centrifuge tube every 5min, centrifuge (10000rpm, 2min), take the supernatant, and measure the absorption spectrum of the solution using a UV-Vis spectrophotometer (Shimadzu UV-2550). The concentration of RhB was determined by the characteristic absorption peak at 554nm. The UV absorption spectrum of the photocatalytic degradation of RhB is as follows Figure 8 shown. The change curve of concentration with time during the degradation process is as follows: Figure 9 Shown (while giving Bi 2 WO 6 The photocataly...
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