Ultra-thin bismuth oxyhalide nanosheet as well as preparation and application thereof

A technology of bismuth oxyhalide and nanosheets is applied in the field of photocatalysis, which can solve the problems that have not yet been found, and achieve the effects of reducing the electron-hole recombination rate, improving the utilization rate, and improving the catalytic properties.

Inactive Publication Date: 2018-08-10
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the current reports on bismuth oxyhalide photocatalysts are mainly in the field of photodegradation of organic dyes, and as CO 2 Photoreduction catalysts have not been reported yet

Method used

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  • Ultra-thin bismuth oxyhalide nanosheet as well as preparation and application thereof
  • Ultra-thin bismuth oxyhalide nanosheet as well as preparation and application thereof
  • Ultra-thin bismuth oxyhalide nanosheet as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 0.019g of guar gum and 9.701g of bismuth nitrate pentahydrate, mix them evenly and grind for 30min to obtain the precursor;

[0027] (2) Slowly add the precursor prepared above into 10ml potassium chloride aqueous solution with a concentration of 0.01mol / L, mix and stir evenly to obtain a paste liquid;

[0028] (3) Transfer the pasty liquid to a 500ml flask, add 180ml of water, then stir and react at 30°C for 3h to obtain the product, then wash and dry the product to obtain ultrathin bismuth oxychloride nanosheets.

Embodiment 2

[0030] (1) Weigh 0.097g of guar gum and 9.701g of bismuth nitrate pentahydrate, mix them evenly and grind for 35min to obtain the precursor;

[0031] (2) Slowly add the above-prepared precursor into 10ml potassium bromide aqueous solution with a concentration of 0.05mol / L, mix and stir evenly to obtain a pasty liquid;

[0032] (3) Transfer the pasty liquid to a 500ml flask, add 190ml of water, then stir and react at 45°C for 3.5h to obtain the product, then wash and dry the product to obtain ultrathin bismuth oxybromide nanosheets.

Embodiment 3

[0034] (1) Weigh 0.146 g of guar gum and 9.701 g of bismuth nitrate pentahydrate, mix them evenly and grind for 40 minutes to obtain the precursor;

[0035] (2) Slowly add the precursor prepared above into 10ml potassium chloride aqueous solution with a concentration of 0.08mol / L, mix and stir evenly to obtain a paste liquid;

[0036] (3) Transfer the pasty liquid to a 500ml flask, add 200ml of water, then stir and react at 65°C for 4h to obtain the product, then wash and dry the product to obtain ultrathin bismuth oxychloride nanosheets.

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Abstract

The invention discloses an ultra-thin bismuth oxyhalide nanosheet as well as preparation and application thereof. The ultra-thin bismuth oxyhalide nanosheet is prepared by using bismuth nitrate pentahydrate, potassium chloride or potassium bromide as raw materials, and hydroxypropyl guar gum as a thickening agent, and adopting a hydrolysis method at low temperature. The preparation method providedby the invention has a simple process and low costs, and is green, environmentally friendly and easy to control and produce in a large scale; the guar gum is added as the thickening agent in the preparation process, various raw materials are mixed more uniformly, so that an occurrence of agglomeration of macromolecular particles in the preparation process is avoided, and preparation of a more ultra-thin bismuth oxyhalide photocatalyst with a larger specific surface area is facilitated; and the prepared ultra-thin bismuth oxyhalide nanosheet is a nano-scale layered structure, can respond in avisible light range, has stronger stability, higher catalytic efficiency, and a significant effect and huge application space in the field of photocatalytic reduction of CO2.

Description

【Technical field】 [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to an ultra-thin bismuth oxyhalide nanosheet and its preparation and application. 【Background technique】 [0002] With the rapid growth of population and the continuous development of modern industry, the problems of environmental pollution and energy shortage are becoming more and more serious, especially the CO caused by the combustion of fossil energy mainly composed of coal, oil and natural gas 2 Excessive emissions have become a hot spot of concern in recent years. So how to solve CO 2 The greenhouse effect caused by excessive emissions will reduce CO 2 Effectively transform into clean energy and achieve CO 2 The reduction of emissions and the recycling of carbon resources to alleviate the energy crisis caused by the excessive use of fossil energy have become the focus of many researchers. [0003] In recent years, photocatalytic technology, as a new ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/02C01B32/40C07C1/02C07C9/04C10L3/08
CPCB01J27/06B01J35/0013B01J35/004B01J35/02B01J37/0009C01B32/40C07C1/02C07C2527/06C10L3/08C07C9/04
Inventor 叶立群王丽马照宇谢海泉
Owner NANYANG NORMAL UNIV
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