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A preparation method, product and application of hexadecyltrimethylammonium bromide modified bismuth molybdate photoelectrode

A technology of cetyltrimethylammonium bromide and bismuth molybdate is applied in chemical instruments and methods, light water/sewage treatment, water/sludge/sewage treatment, etc. Unsatisfactory photocatalytic activity, limited popularization and application, etc.

Active Publication Date: 2021-12-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure Bi 2 MoO 6 Due to the wide band gap, it can only respond to ultraviolet light, which greatly limits its popularization and application; at the same time, its photogenerated charge recombination rate is high, and its photocatalytic activity is not satisfactory.

Method used

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  • A preparation method, product and application of hexadecyltrimethylammonium bromide modified bismuth molybdate photoelectrode
  • A preparation method, product and application of hexadecyltrimethylammonium bromide modified bismuth molybdate photoelectrode
  • A preparation method, product and application of hexadecyltrimethylammonium bromide modified bismuth molybdate photoelectrode

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Experimental program
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Effect test

Embodiment 1

[0033] Step 1: Preparation of bismuth molybdate powder by hydrothermal method

[0034] Take 1mol / L Na 2 MoO 4 2H 2 O solution 50ml and 2mol / L Bi(NO 3 ) 3 ·5H 250ml of O solution was thoroughly mixed to obtain a bismuth molybdate precursor solution, adjusted to a pH value of 9 with NaOH, placed in a hydrothermal reaction kettle, and subjected to a hydrothermal reaction at 120°C for 24 hours, and filtered after the hydrothermal reaction was completed. Dry and grind at 60°C to obtain bismuth molybdate powder;

[0035] Step 2: Preparation of bismuth molybdate photoelectrode

[0036] Add 0.15g of bismuth molybdate powder prepared in step 1 to 10ml of water to make a bismuth molybdate suspension, add 2mL of polyethylene glycol 400 and stir evenly, then add 0.1g of ethanol, heat and stir at 70°C until completely dissolved, and obtain a viscous Suspension, the suspension is evenly scraped onto the FTO conductive glass, the thickness of the film layer is 45 μm, placed in an oven...

Embodiment 2

[0038] The preparation process is the same as that in Example 1, except that 0.04 mol of CTAB is added to the uniformly mixed bismuth molybdate precursor solution in step 1 to obtain a CTAB-modified bismuth molybdate photoelectrode (BMO-1);

[0039] The photoelectrode prepared in embodiment 1 and embodiment 2 is carried out structure and morphology analysis, and the X-ray diffraction spectrum (XRD) of implementing 1 photoelectrode and embodiment 2 photoelectrode is as follows figure 1 As shown, several groups of enhanced diffraction peaks 2θ=28.24°, 32.59°, 33.07°46.72°, 55.45°, 56.16° and 58.42° can be observed in the spectrum, corresponding to (131), (002), (060) , (202), (331), (262) crystal planes, the positions of the diffraction peaks and Bi 2 MoO 6 The XRD standard card (JCPDS 21-0102) matches, all belong to the orthorhombic crystal phase, and no other impurity phases appear, indicating that the purity is high. After calcination in the muffle furnace, compared with th...

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Abstract

The invention belongs to the technical field of photoelectric catalytic oxidation of semiconductors, and in particular relates to a preparation method, product and application of a bismuth molybdate photoelectrode modified by a cetyltrimethylammonium bromide assisted hydrothermal method. First prepare bismuth molybdate powder with CTAB added by hydrothermal method, then add polyethylene glycol and a little ethanol in turn to make a suspension with good viscosity, then evenly scrape and coat it on FTO conductive glass, and dry it in an oven , and then placed in a muffle furnace for high-temperature roasting to obtain a CTAB-modified bismuth molybdate photoelectrode. Bi prepared by adding surfactant of the present invention 2 MoO 6 From the original granular shape to smaller and thinner nano-sheets, the photoelectrode band gap width will be 2.23eV if it is 2.57eV, and the photocurrent will be about 0.029μA / cm 2 , which is 1.5 times stronger than that without surfactant. The experiment of degrading methylene blue shows that the degradation efficiency of the improved photoelectrode is increased by 26%.

Description

technical field [0001] The invention relates to the field of photoelectric catalytic oxidation of semiconductors, in particular to a preparation method, product and application of cetyltrimethylammonium bromide modified bismuth molybdate photoelectrode. Background technique [0002] The rapid development of industrialization has produced a large amount of wastewater, and organic dyes are one of the main components of wastewater. Widespread environmental and health concerns arise from organic dyes from the textile, plastic, leather and cosmetics industries. Since organic dyes absorb sunlight, chromophore dyes like methylene blue affect phytoplankton in water by inhibiting photosynthetic activity. These carcinogenic pollutants pose a threat to mammals through the food chain and direct contact with contaminated water. Many traditional water treatment methods such as biological oxidation, adsorption, photocatalysis, and flocculation-ion precipitation have been used to remove o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/32C02F101/38
CPCC02F1/46109C02F1/32C02F2001/46133C02F2101/308C02F2101/38
Inventor 薛娟琴雷大士张健李姝昊毕强唐长斌
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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