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Preparation method of photocatalyst CdS-NiS nanocomposite material

A nanocomposite material and photocatalyst technology, which is applied in the field of preparation of photocatalyst CdS-NiS nanocomposite materials, can solve the problems of high equipment requirements, expensive raw materials, time required for reaction, photocatalysts that cannot be mass-produced, etc. The effect of regular appearance and uniform size

Inactive Publication Date: 2017-08-01
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are more or less some defects in these methods, such as the high equipment requirements of the various reaction conditions required by the hydrothermal method; the raw materials used in the sol-gel method are relatively expensive

Method used

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  • Preparation method of photocatalyst CdS-NiS nanocomposite material
  • Preparation method of photocatalyst CdS-NiS nanocomposite material
  • Preparation method of photocatalyst CdS-NiS nanocomposite material

Examples

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Example Embodiment

[0026] Example 1

[0027] A preparation method of a photocatalyst CdS-NiS nanocomposite material, comprising the following steps: adding 1.5 g of mercaptobenzothiazole cadmium into a 250 mL three-necked flask containing 80 mL of oleic acid, continuously stirring and heating to 100° C. After the solid is dissolved, continue to heat to 240°C for 5 minutes to complete the thermal decomposition of the complex. After cooling, the solid product was washed and centrifuged, the excess impurities were taken out, added to 50 mL of saturated sodium sulfide solution, heated in a constant temperature water bath at 65°C for 5 minutes, washed and centrifuged to remove excess sulfide ions, and then the solid product was dissolved in water and kept at a constant temperature of 65°C. Heating in a water bath, and slowly adding 50 mL of nickel chloride aqueous solution with a concentration ratio of 0.15 g: 50 mL dropwise, continuing the reaction for 5 minutes after the dropwise addition to stop h...

Example Embodiment

[0028] Example 2

[0029] The same conditions as in Example 1, the nickel chloride solution concentration ratio added dropwise was changed to 0.3 g: 50 mL to obtain a 20% Ni-doped composite metal sulfide CdS-NiS.

Example Embodiment

[0030] Example 3

[0031] Under the same conditions as in Example 1, the concentration ratio of the nickel chloride solution added dropwise was changed to 0.45 g:50 mL to obtain a 30% Ni-doped composite metal sulfide CdS-NiS.

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Abstract

The invention discloses a prepration method of a photocatalyst CdS-NiS nanocomposite material. The preparation method comprises the steps of putting 0.8 to 2g of mercaptobenzothiazole cadmium into 50 to 100mL of an organic solvent with a high boiling point, heating and dissolving to obtain a uniform solution, continuously heating to thermally decomposing the mercaptobenzothiazole cadmium, cooling, washing and centrifuging to obtain a solid product; adding the obtained product into 20 to 80mL of a saturated sodium sulphide solution, heating in water bath and continuously stirring, removing redundant sulphur ions from the product with absolute ethyl alcohol, and centrifuging to obtain a centrifuged product; dispersing the obtained centrifuged product into water, then mixing with a soluble nickel salt solution, continuously stirring for fully reacting, centrifugally washing, and drying to obtain a composite metal sulfide CdS-NiS. An obtained sample is regular in morphology, uniform in size, and capable of effectively absorbing ultraviolet light and visible light, and has a remarkable degradation effect on organic pollutants including rhodamine B, methylthionine chloride and methyl orange.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing a photocatalyst CdS-NiS nanocomposite material. Background technique [0002] Photocatalytic technology has attracted more and more attention due to its application in converting solar energy into hydrogen energy and photocatalytic degradation of organic compounds. with TiO 2 The representative traditional oxide photocatalyst can only respond to ultraviolet light and near ultraviolet light because of its narrow band gap (3.2 eV ), and has a low utilization rate of solar energy (about 5%), which greatly restricts its market development. Therefore, more and more research attention has now turned to transition metal sulfides. [0003] Metal sulfides are ideal for the absorption of visible light, but a single metal sulfide is unstable under light irradiation, and is prone to photocorrosion and photogenerated electron-hole recombination, resulting ...

Claims

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Application Information

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IPC IPC(8): B01J27/043C02F1/30C02F1/32C02F101/30
CPCB01J27/043B01J35/004C02F1/30C02F1/32C02F2101/30C02F2305/10
Inventor 张克杰谢旺旺李明隆黄楠李旺杜雨泓周志萍
Owner NANJING INST OF TECH
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