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CaTiO3@ZnIn2S4 nano composite material as well as preparation method and application thereof

A nanocomposite material, znin2s4 technology, applied in the field of photocatalysis, can solve the problems of reduced solar energy utilization, low visible light absorption, large forbidden band width, etc., to achieve the effects of easy purchase, abundant resources, and easy operation

Active Publication Date: 2019-07-19
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CaTiO 3 It has a large band gap and low absorption of visible light, which reduces the utilization rate of solar energy and limits its application in the field of photocatalytic hydrogen production from water

Method used

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  • CaTiO3@ZnIn2S4 nano composite material as well as preparation method and application thereof
  • CaTiO3@ZnIn2S4 nano composite material as well as preparation method and application thereof
  • CaTiO3@ZnIn2S4 nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Place 0.25mmol calcium nitrate in a beaker, add 5mL deionized water and stir for 10min to form a uniform solution, then add 0.84mmol tetrabutyl titanate and 0.84mmol polyethylene glycol-200 to the solution, stir 30min, then add 1.68×10 to the resulting solution -4 mmol sodium hydroxide aqueous solution, stir evenly, transfer the solution to a 50mL stainless steel reactor with PTFE lining, and react at 200℃ for 17h; after the natural cooling, the reaction solution is centrifuged, washed, dried, and collected , Get hollow CaTiO 3 cuboid;

[0028] (2) Take 10.5mg of the hollow CaTiO obtained in step (1) 3 The cuboid was moved into an oil bath, and 37.8 mg of zinc chloride, 61.95 mg of indium chloride, and 42 mg of thioacetamide were added. The temperature was raised to 80°C at a rate of 2°C / min in an air atmosphere, and the oil bath was stirred for 3 hours to obtain CaTiO 3 @ZnIn 2 S 4 Nanocomposite materials.

[0029] For the hollow CaTiO prepared in step (1) 3 Cuboid for...

Embodiment 2

[0032] In CaTiO 3 @ZnIn 2 S 4 Do not add hollow CaTiO during the preparation of nanocomposites 3 Cuboid, the rest of the reagent dosage and operation steps are the same as step 2 of Example 1.

Embodiment 3

[0034] In CaTiO 3 @ZnIn 2 S 4 No ZnIn is added during the preparation of nanocomposites 2 S 4 , The rest of the reagent dosage and operation steps are the same as step 1 in Example 1.

[0035] XRD tests were performed on the products obtained in Examples 1, 2 and 3, and the test results are shown in image 3 . As shown, the CaTiO 3 @ZnIn 2 S 4 Comparing the X-ray diffraction peak of the nanocomposite with the X-ray diffraction peak of a single material, it can be seen that CaTiO 3 With ZnIn 2 S 4 Successful recombination, the diffraction peaks are matched with the corresponding crystal planes and no impurity peaks.

[0036] The specific analysis is as follows: the strong diffraction peaks at 2θ=23.1°, 32.9°, 59.0° and 69.5° are similar to those of perovskite CaTiO 3 The (101), (121), (042) and (242) crystal planes (PDF#22-0153) match. The strong diffraction peaks at 27.8° and 48.4° are the same as ZnIn 2 S 4 The (311) and (440) crystal planes (PDF#48-1778) match. According to thes...

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Abstract

The invention provides a CaTiO3@ZnIn2S4 nano composite material. A hollow CaTiO2 rectangle is adopted as a substrate, and the outer layer of the rectangle is uniformly wrapped with ternary sulfide ZnIn2S4 nanosheets. Compared with the prior art, the raw material used by the CaTiO3@ZnIn2S4 nano composite material provided by the invention is easy to purchase, and the CaTiO3@ZnIn2S4 nano composite material is rich in resource, low in price, green and environmental-friendly, simple in preparation method, easy to operate and convenient in large-scale production; the CaTiO3@ZnIn2S4 nano composite material provided by the invention can be used as a photocatalyst, a hydrogen yield can be remarkably increased, the photocatalysis hydrogen yield is up to 125016.4mu mol / g within 6 hours, and good circulation stability in the photocatalysis hydrogen production process can be maintained.

Description

Technical field [0001] The invention relates to the field of photocatalysis technology, in particular to the photocatalyst CaTiO 3 @ZnIn 2 S 4 Nanocomposite material and its preparation method and application. Background technique [0002] Since the early 1970s, Fujishima and Honda discovered TiO 2 Since it can be used for photocatalytic cracking of water to produce hydrogen, cracking water to produce hydrogen has become one of the most promising methods to solve the energy crisis and environmental pollution problems. So far, the use of semiconductor materials as photocatalysts has made great progress in the application of photocatalytic cracking of water to hydrogen production. In order to improve the hydrogen production rate, the selected semiconductor photocatalyst should meet various standards, such as having a matching band gap to absorb solar energy as much as possible, effectively separating photogenerated electrons and holes, meeting the redox potential of water splitting...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J37/02B82Y30/00B82Y40/00C01B3/04
CPCB01J27/04B01J37/0215B82Y30/00B82Y40/00C01B3/042C01B2203/0277C01B2203/1041B01J35/39Y02E60/36
Inventor 韩吉姝戴方旭王磊赵瑞阳杨宇陈瑞欣
Owner QINGDAO UNIV OF SCI & TECH
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