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Preparation and application of reinforced {010} composite photocatalyst with crystal surface bismuth vanadate and nanometer flake zinc oxide

A nano-flaky, bismuth vanadate technology, which is applied in the field of organic pollutant degradation, can solve the problems that are not suitable for large-scale actual production of water treatment agents, require high precision, and strict preparation conditions, so as to improve efficiency and increase aggregation , Improve the effect of specific surface area

Active Publication Date: 2020-02-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the noble metal, rare earth metal or quantum dot modification method has the disadvantages of expensive raw materials and relatively strict preparation conditions, and the structure of the core-shell structure also requires a high degree of fineness in the operation process, which are not suitable for large-scale practical application of water treatment agents. Production

Method used

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  • Preparation and application of reinforced {010} composite photocatalyst with crystal surface bismuth vanadate and nanometer flake zinc oxide
  • Preparation and application of reinforced {010} composite photocatalyst with crystal surface bismuth vanadate and nanometer flake zinc oxide
  • Preparation and application of reinforced {010} composite photocatalyst with crystal surface bismuth vanadate and nanometer flake zinc oxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Dissolve bismuth nitrate pentahydrate in 50mL 2mol / L nitric acid solution, stir for 15min until clear and transparent.

[0034] (2) Add ammonium metavanadate in equal proportions to bismuth nitrate pentahydrate into the above solution while stirring, and keep stirring for 15 minutes until an orange transparent clear solution is obtained.

[0035] (3) In a dark environment, absorb a certain amount of 15%-20% titanium trichloride hydrochloric acid solution and add it dropwise to the above solution, so that the molar percentage of titanium trichloride is 2%. After the titanium trichloride is evenly dispersed into the solution, immediately adjust the pH to 0.5 with 25%-28% ammonia solution to obtain an orange suspension.

[0036] (4) Cover the container with a parafilm, and continue to stir the suspension for 2 hours under the condition of cutting off the air. Afterwards, the suspension was transferred to a polytetrafluoroethylene liner, placed in a hydrothermal reacti...

Embodiment 2

[0043] (1) Dissolve bismuth nitrate pentahydrate in 50mL 2mol / L nitric acid solution, stir for 15min until clear and transparent.

[0044] (2) Add ammonium metavanadate in equal proportions to bismuth nitrate pentahydrate into the above solution while stirring, and keep stirring for 15 minutes until an orange transparent clear solution is obtained.

[0045] (3) In a dark environment, absorb a certain amount of 15%-20% titanium trichloride hydrochloric acid solution and add it dropwise to the above solution, so that the molar percentage of titanium trichloride is 2%. After the titanium trichloride is evenly dispersed into the solution, immediately adjust the pH to 0.5 with 25%-28% ammonia solution to obtain an orange suspension.

[0046] (4) Cover the container with a parafilm, and continue to stir the suspension for 2 hours under the condition of cutting off the air. Afterwards, the suspension was transferred to a polytetrafluoroethylene liner, placed in a hydrothermal reacti...

Embodiment 3

[0053] (1) Dissolve bismuth nitrate pentahydrate in 50mL 2mol / L nitric acid solution, stir for 15min until clear and transparent.

[0054] (2) Add ammonium metavanadate in equal proportions to bismuth nitrate pentahydrate into the above solution while stirring, and keep stirring for 15 minutes until an orange transparent clear solution is obtained.

[0055] (3) In a dark environment, absorb a certain amount of 15%-20% titanium trichloride hydrochloric acid solution and add it dropwise to the above solution, so that the molar percentage of titanium trichloride is 2%. After the titanium trichloride is evenly dispersed into the solution, immediately adjust the pH to 0.5 with 25%-28% ammonia solution to obtain an orange suspension.

[0056] (4) Cover the container with a parafilm, and continue to stir the suspension for 2 hours under the condition of cutting off the air. Afterwards, the suspension was transferred to a polytetrafluoroethylene liner, placed in a hydrothermal reacti...

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Abstract

The invention relates to preparation and application of a reinforced {010} composite photocatalyst with crystal surface bismuth vanadate and nanometer flake zinc oxide. Ttanium trichloride is adoptedas a structure modifier, under a certain pH condition, hydrothermal modification of bismuth vanadate is implemented, bismuth vanadate after crystal modification is adopted as a substrate, a zinc oxideprecursor is supported by the substrate in situ by using a hydrothermal method, and a final catalyst is prepared through calcination. The efficient, low-toxicity, stable and recyclable photocatalystis synthesized by using a simple and low-cost method.

Description

technical field [0001] The invention relates to the field of degradation of organic pollutants, in particular to the preparation and application of a composite photocatalyst of strengthened {010} crystal plane bismuth vanadate and nano-flaky zinc oxide. Background technique [0002] Pharmaceuticals and personal care products (PPCPs), as common micro-pollutants in water, have attracted widespread attention from all walks of life. They are usually difficult to completely remove through conventional treatment methods in sewage treatment plants, and once they enter the water environment, they are potentially harmful to aquatic animals, plants and even humans. Tetracycline, as a common PPCPs in water, appears in aquaculture wastewater and pharmaceutical factory wastewater on a large scale, and research on its removal is of great significance. [0003] Photocatalysis is an advanced oxidation technology. Photocatalysts in aqueous solution excite photogenerated electrons and holes...

Claims

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Application Information

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IPC IPC(8): B01J23/22B01J37/10B01J37/08C02F1/30C02F101/38
CPCB01J23/22B01J37/10B01J37/08C02F1/30C02F2101/38C02F2305/10B01J35/39
Inventor 李正魁龚泠萱陈志浩李丹丹徐梦珊罗文齐覃云斌朱鸿杰胡优优丁帮璟
Owner NANJING UNIV