Wide-spectral-response soft bismuth ore-based efficient photocatalyst and preparation method thereof

A technology of bismuth salt and reaction, which is applied in the field of wide-spectrum response soft bismuth mineral-based high-efficiency photocatalyst and its preparation, can solve the problems of low visible light activity, many iron-site defects, and many defects, and achieve high photocatalytic activity, defects and Less impurities and good crystallinity

Active Publication Date: 2021-03-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN101723467A proposes a method for synthesizing bismuth ferrite soft bismuth ore by hydrothermal method, but it has many iron defects and poor activity, and the removal rate of methyl orange under visible light irradiation for 14 hours is only 78%.
Soft bismuthite photocatalysts reported in the literature (for example: AndréE.Nogueira et al.Colloid Interf.Sci.2014,415,89, Tae Hoon Noh et al.Ceram.Int.43,2017,12102–12108; Lin Xinping et al. al.Catal.Commun.9,2008,572–576.), high-temperature solid-state reaction methods are often used, and the problems of wide band gap, many defects, and low visible light activity are common

Method used

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  • Wide-spectral-response soft bismuth ore-based efficient photocatalyst and preparation method thereof
  • Wide-spectral-response soft bismuth ore-based efficient photocatalyst and preparation method thereof
  • Wide-spectral-response soft bismuth ore-based efficient photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033]Dissolve 0.009mol NaOH in 30ml deionized water (ie 0.3M), add 2.5mmol Bi(NO 3 ) 3 ·5H 2 O (ie 0.083M) and 0.1mmol of Co(NO 3 ) 2 ·6H 2 O (that is, 0.0033M), stirred for 30min, transferred the light yellow precipitate to a 50ml p-polyphenylene (PPL)-lined hydrothermal kettle, heated at 270°C for 12h, cooled to room temperature, centrifuged the product, and washed with deionized water Wash with ethanol to pH 7, and dry at 60°C to obtain the product Bi 24 (Bi 2-x co x )O 39+x (x=1).

Embodiment 2

[0035] Add 1mL of concentrated ammonia water to 30ml of deionized water (ie 0.4M), add 1mmol of (CH 3 CO 2 ) 3 Bi (ie 0.033M) and 1mmol of CoCl 2 (that is, 0.033M), stirred for 30min, transferred the light yellow precipitate to a 50ml p-polyphenylene (PPL) lined hydrothermal kettle, heated it at 120°C for 72h, cooled to room temperature, centrifuged the product, and washed it with deionized water and Washed with ethanol to pH 7, dried at 60°C to obtain the product Bi 24 (Bi 2-x co x )O 39+x (x=0.65).

Embodiment 3

[0037] Dissolve 0.12mol KOH in 30ml deionized water (ie 4M), add 1.6mmol of BiCl 3 (ie 0.053M) and 0.1mmol of C 4 h 6 COO 4 (that is, 0.0033M), stirred for 30min, transferred the light yellow precipitate to a 50ml p-polyphenylene (PPL) lined hydrothermal kettle, heated it at 180°C for 24h, cooled to room temperature, centrifuged the product, and washed it with deionized water and Washed with ethanol to pH 7, dried at 60°C to obtain the product Bi 24 (Bi 2-x co x )O 39+x (x=0.1).

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Abstract

The invention discloses a wide-spectral-response soft bismuth ore-based efficient photocatalyst and a preparation method thereof, and belongs to the field of environmental science and inorganic material preparation. The novel broad-spectrum-response soft bismuth ore-based photocatalyst Bi[24](Bi[2-x]Co[x])O[39+x] (x is greater than 0 and less than or equal to 1) for efficient photocatalytic degradation of organic pollutants is prepared by adopting a hydrothermal method, specifically, bismuth salt and cobalt salt are dissolved in alkali liquor with a specific concentration, and hydrothermal reaction is carried out at a relatively mild temperature for a relatively long time, so that the photocatalyst Bi[24](Bi[2-x]Co[x])O[39+x] is prepared. The preparation method provided by the invention islow in cost, simple in process and easy to control, and provides a new preparation idea for preparation of other soft bismuth ore photocatalysts with similar structures; the obtained catalyst has thecharacteristics of narrow energy gap, good crystallinity and high purity, shows good visible light catalytic degradation activity on organic pollutants in water such as dyes, phenols and the like, and has a wide potential application prospect in the field of visible light organic pollutant degradation.

Description

technical field [0001] The invention relates to a wide-spectrum response soft bismuth mineral-based high-efficiency photocatalyst and a preparation method thereof, belonging to the fields of environmental science and inorganic material preparation. Background technique [0002] In recent years, semiconductor photocatalysis technology has been widely used in the fields of pollutant degradation, photolysis of water and hydrogen production. Titanium dioxide, which is the most widely used commercially, can only use ultraviolet rays accounting for 4% of sunlight due to its forbidden band width greater than 3.0eV, and has a low utilization rate of visible light accounting for 57% of sunlight. At the same time, its ultraviolet light pollutant removal rate cannot meet the needs of practical applications, so its practical application is greatly limited. The development of new photocatalysts that efficiently utilize visible light is the main direction of current photocatalytic resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J37/10C02F1/30C01G51/00B82Y40/00C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J23/002B01J23/8437B01J35/004B01J37/10B82Y40/00C01G51/40C01P2002/72C01P2002/85C01P2004/62C01P2004/64C01P2006/40C02F1/30C02F2101/30C02F2101/308C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2101/40C02F2305/10
Inventor 潘成思王震林张颖娄阳董玉明朱永法
Owner JIANGNAN UNIV
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