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A bismuth vanadate electrode co-modified by mof and hrgo and its preparation method and application

A technology of bismuth vanadate and co-modification, applied in chemical instruments and methods, electrochemical water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems that cannot be implemented, cannot be directly applied to electrode preparation, etc., and achieve high gloss current, good photocatalytic activity, and low charge transfer resistance

Active Publication Date: 2022-05-31
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technical solution prepares powder materials, and grows BiVO in situ on MIL-125(Ti) 4 , cannot be directly applied to electrode preparation
Because the electrode preparation must be substrate / BiVO 4 / MIL-125(Ti) structure, unable to implement in-situ growth of BiVO on MIL-125(Ti) 4 s method

Method used

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  • A bismuth vanadate electrode co-modified by mof and hrgo and its preparation method and application
  • A bismuth vanadate electrode co-modified by mof and hrgo and its preparation method and application
  • A bismuth vanadate electrode co-modified by mof and hrgo and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a photoelectric catalytic electrode, comprising the following steps:

[0041] (1) 0.3234g Bi(NO) 3 ·5H 2 O was dissolved in 1 mL of concentrated nitric acid (70 wt%), then 2 mL of distilled water was added, and 0.078 g of NH was added after mixing evenly. 4 VO 3 And 0.167g of polyvinyl alcohol (PVA, 99%) was dissolved in the above solution, and the seed solution was obtained by ultrasonic for 30min.

[0042] (2) Smear 20 μL of seed solution on clean FTO, vacuum dry for 1 h, and then calcine in a muffle furnace at 450 °C for 2 h.

[0043] (3) 0.06mmol Bi(NO) 3 ·5H 2 O and 0.06 mmol NH 4 VO 3 Dissolve in 400 μL of concentrated nitric acid (70 wt%), add distilled water to 15 mL, put it into the autoclave, put the BiVO obtained after burning in the muffle furnace in step (2) with the conductive side facing down 4 After being hydrothermally heated at 180 °C for 12 h, rinsed with distilled water, calcined in a muffle furnace at 450 °C for 2 h t...

Embodiment 2

[0047] Preparation of BiVO in this example 4 / NH 2 MIL125-GO and BiVO 4 / NH 2 The method of the MIL125-rGO electrode is basically the same as that in Example 1, except that:

[0048] In step (4), after the two solutions are mixed uniformly, 2 mg GO and 2 mg rGO are added respectively, and the mixture is sonicated for 30 minutes and placed in an autoclave, respectively, and the prepared BiVO 4 electrode, the conductive side was placed in it, and solvothermally at 150 °C for 12 h to obtain BiVO 4 / NH 2 MIL125-GO Electrode and BiVO 4 / NH 2 MIL125-rGO electrode.

[0049] GO and rGO used in this example were prepared by the following methods:

[0050] Graphene oxide (GO) was prepared by chemical oxidation method using the improved Hummers method, using natural graphite powder as raw material; rGO was prepared by chemical synthesis method, and the prepared graphene oxide was pre-reduced with sodium borohydride at 80 °C for 1 h, and then Sulfonation was carried out with an a...

Embodiment 3

[0052] Preparation of BiVO in this example 4 / NH 2 The process of the MIL125 electrode method is basically the same as that in Example 1, except that:

[0053] In step (4), after the two solutions are evenly stirred, they are directly put into the prepared BiVO 4 electrode, the conductive side was placed in it, and solvothermally at 150 °C for 12 h to obtain BiVO 4 / NH 2 MIL125 electrodes.

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Abstract

The invention discloses a bismuth vanadate electrode co-modified by MOF and HrGO, its preparation method and its application in the field of photoelectric catalysis. The preparation method comprises steps: (1) dissolving bismuth nitrate in nitric acid, and then adding partial Ammonium vanadate and polyvinyl alcohol, ultrasonically obtain the seed solution; the seed solution is smeared on clean conductive glass, dried and calcined, then taken out as the base electrode for use; (2) dissolving bismuth nitrate and ammonium metavanadate in In nitric acid, put the base electrode prepared in step (1), carry out hydrothermal reaction, and calcinate after the reaction to obtain BiVO 4 Electrode; (3) 2-aminoterephthalic acid is dissolved in DMF, and butyl titanate is dissolved in methanol, then above-mentioned two kinds of solutions are mixed and stirred evenly, then add the reduced graphene oxide that obtains through hydrogen plasma treatment Mix well and finally put in the BiVO 4 Electrode, solvothermal reaction to obtain BiVO 4 / NH 2 MIL125‑HrGO composite thin film electrode.

Description

technical field [0001] The invention relates to the technical field of photoelectric catalytic electrode materials, in particular to a bismuth vanadate electrode co-modified with MOF and HrGO, and a preparation method and application thereof. Background technique [0002] With the advancement of the industrialization process and the rapid economic development, the use of a large amount of organic matter has led to the enrichment of wastewater containing organic matter and caused water pollution in the water environment. As a green energy, solar energy is rich in resources and does not produce secondary pollution, which has attracted widespread attention. Photocatalysis, driven by sunlight, can generate photogenerated electron and hole pairs under light irradiation, and is widely used in the degradation of organic pollutants. However, limited by the easy recombination of photogenerated electrons and holes, the difficulty of powder recycling, and the low utilization rate of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46C02F1/30C02F101/34
CPCC02F1/46C02F1/30C02F2101/345Y02W10/37
Inventor 王齐刘颖琪翁文斌简育玲朱建旭张晨诚
Owner ZHEJIANG GONGSHANG UNIVERSITY
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