Preparing methods and applications of a visible-light-responsive bismuth oxysalt photocatalyst Bi<16>Te<5>O<34>

A technology of bismuth oxysalt and photocatalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of good chemical stability, good visible light response ability, and small particles

Inactive Publication Date: 2017-06-20
SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention reports a visible light-responsive bismuth oxylate photocatalyst Bi 16 Te 5 o 34 , its unique crystal structure and energy band structure endow it with good photocatalytic activity, can effectively degrade organic pollutants, the preparation process is simple and environmentally friendly, and it is expected to be widely used in the actual industrial wastewater treatment, and there is no reported

Method used

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  • Preparing methods and applications of a visible-light-responsive bismuth oxysalt photocatalyst Bi&lt;16&gt;Te&lt;5&gt;O&lt;34&gt;
  • Preparing methods and applications of a visible-light-responsive bismuth oxysalt photocatalyst Bi&lt;16&gt;Te&lt;5&gt;O&lt;34&gt;
  • Preparing methods and applications of a visible-light-responsive bismuth oxysalt photocatalyst Bi&lt;16&gt;Te&lt;5&gt;O&lt;34&gt;

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Experimental program
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Effect test

Embodiment 1

[0043] According to the chemical formula Bi 16 Te 5 o 34 , respectively weigh bismuth oxide Bi 2 o 3 : 3.728 g, tellurium tetrachloride TeCl 4 : 1.347 grams, bismuth oxide is dissolved in an appropriate amount of dilute nitric acid solution, 2.882 grams of oxalic acid is weighed and added to the above solution, and continuously stirred until completely dissolved to obtain A solution; Tellurium tetrachloride is dissolved in an appropriate amount of dilute hydrochloric acid solution , Weigh 0.900 g of oxalic acid and add it to the above solution, stir continuously until it is completely dissolved to obtain solution B; slowly mix A, B and the solution, and stir at 60-80°C for 2-4 hours to obtain a viscous colloid. Stand still and dry to get a fluffy precursor. The precursor is placed in an alumina crucible, calcined in an air atmosphere in a muffle furnace, and calcined at 750° C. for 6 hours, taken out after natural cooling, and ground evenly to obtain a bismuth oxo-salt ph...

Embodiment 2

[0050] According to the chemical formula Bi 16 Te 5 o 34 , respectively weigh bismuth nitrate Bi(NO 3 ) 3 •6H 2 O: 4.851 g, tellurium dioxide TeO 2 : 0.499 grams, bismuth oxide is dissolved in an appropriate amount of dilute nitric acid solution, 2.882 grams of citric acid is weighed and added to the above solution, and stirred continuously until completely dissolved to obtain A solution; tellurium dioxide is dissolved in an appropriate amount of dilute hydrochloric acid solution , Weigh 0.901 g of citric acid and add it to the above solution, stir continuously until it is completely dissolved to obtain solution B; slowly mix A, B and the solution, and stir at 60-80°C for 2-4 hours to obtain a viscous colloid , let stand and dry to obtain a fluffy precursor. The precursor is placed in an alumina crucible, calcined in an air atmosphere in a muffle furnace, and calcined at 850° C. for 10 hours, taken out after natural cooling, and ground evenly to obtain a bismuth oxo-salt...

Embodiment 3

[0053] According to the chemical formula Bi 16 Te 5 o 34 , respectively weigh bismuth chloride BiCl 3 : 3.153 g, tellurium tetrachloride TeCl 4 : 0.842 g, bismuth oxide is dissolved in an appropriate amount of dilute nitric acid solution, 0.900 g of oxalic acid is weighed and added to the above solution, and stirred continuously until completely dissolved to obtain A solution; tellurium tetrachloride is dissolved in an appropriate amount of dilute hydrochloric acid solution , Weigh 0.281 g of oxalic acid and add it to the above solution, and stir continuously until it is completely dissolved to obtain solution B; slowly mix A, B and the solution, and stir at 60-80°C for 2-4 hours to obtain a viscous colloid. Stand still and dry to get a fluffy precursor. The precursor is placed in an alumina crucible, calcined in an air atmosphere in a muffle furnace, calcined at 780°C for 8 hours, taken out after natural cooling, and ground evenly to obtain a bismuth oxo-salt photocatalys...

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Abstract

The invention discloses preparing methods and applications of a visible-light-responsive bismuth oxysalt photocatalyst Bi<16>Te<5>O<34>, and belongs to the field of inorganic photocatalytic materials. The catalyst is prepared by a sol gel method and a co-precipitation method respectively. The preparing methods are simple and low in cost. The photocatalytic material prepared by the methods has uniform granularity, good chemical stability and excellent photocatalytic performance, can effectively degrade organic pollutants under visible light irradiation, and has a wide application prospect in the fields of sewage treatment and environment protection.

Description

technical field [0001] The invention relates to a visible light-responsive bismuth oxylate photocatalyst Bi 16 Te 5 o 34 The preparation method and application thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] With the rapid development of modern industry, factories discharge sewage arbitrarily, causing a large amount of toxic and harmful organic pollutants to exist in rivers, lakes and other waters. Water resources are seriously polluted, posing a huge threat to human and ecological health. Therefore, the treatment of water pollution has become a global important issue. At present, the main solutions are: membrane filtration technology, activated carbon adsorption, microbial degradation, enzymatic decomposition, photocatalytic technology and so on. Among these technologies, semiconductor photocatalysis is an environmentally friendly new technology for degrading organic pollutants in water or air. It has high treatment effic...

Claims

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Application Information

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IPC IPC(8): B01J27/057
CPCB01J27/0576B01J35/39
Inventor 金浴雅马忠苏晓磊谢洪德
Owner SUZHOU DEJIE MEMBRANE MATERIAL SCI & TECH
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