Unlock instant, AI-driven research and patent intelligence for your innovation.

G-C3N4/metal hydroxide composite photocatalyst and preparation method thereof

A hydroxide, g-c3n4 technology, applied in the field of photocatalysis and inorganic nanomaterials, can solve problems such as unfavorable large-scale continuous production, cumbersome preparation process, etc., achieve excellent physical and chemical properties, extended absorption range, strong visible light absorption effect of ability

Pending Publication Date: 2021-08-10
XIANGTAN UNIV
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the catalytic activity of the above-mentioned composite photocatalyst has been improved to a certain extent, the preparation process of the sample is cumbersome, which is not conducive to large-scale continuous production.
[0005] Currently, based on g-C 3 N 4 There are few reports on the construction of composite photocatalyst materials with metal hydroxides

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • G-C3N4/metal hydroxide composite photocatalyst and preparation method thereof
  • G-C3N4/metal hydroxide composite photocatalyst and preparation method thereof
  • G-C3N4/metal hydroxide composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] g-C 3 N 4 / Metal hydroxide composite photocatalyst, is made by the reaction of 3.6g nitrogen-containing precursor (urea), 14.4g urea, 26.193g cobalt nitrate hexahydrate and 11.254g aluminum nitrate nonahydrate;

[0042] g-C above 3 N 4 The preparation method of / metal hydroxide composite photocatalyst specifically comprises the following steps:

[0043] (1) Take each raw material by the above-mentioned consumption;

[0044] (2) Wrap 3.6g of nitrogen-containing precursor (urea) in tin foil and place it in a crucible, heat up to 530°C at a rate of 5°C / min and roast for 4.5h, then grind to obtain light yellow g-C 3 N 4 ,spare;

[0045] (3) Dissolve cobalt nitrate hexahydrate, aluminum nitrate nonahydrate, and urea in 500 mL of distilled water, and carry out ultrasonic dispersion for 20 min at a power of 20 kHz to obtain a soluble metal salt solution with a total metal ion concentration of 0.12 mol / L, and set aside;

[0046] (4) Add 1.6g of g-C 3 N 4 Add soluble met...

Embodiment 2

[0054] g-C 3 N 4 / Metal hydroxide composite photocatalyst, is made by reacting 3.475g melamine, 13.9g urea, 12.101g zinc nitrate hexahydrate, 13.097g nickel nitrate hexahydrate and 11.254g aluminum nitrate nonahydrate;

[0055] g-C above 3 N 4 The preparation method of / metal hydroxide composite photocatalyst specifically comprises the following steps:

[0056] (1) Take each raw material by the above-mentioned consumption;

[0057] (2) Wrap melamine in tin foil and place it in a crucible, heat up to 500°C at 5°C / min and bake for 5 hours, then grind to obtain light yellow g-C 3 N 4 ,spare;

[0058] (3) Dissolve zinc nitrate hexahydrate, nickel nitrate hexahydrate, aluminum nitrate nonahydrate, and urea in 500 mL of distilled water, and perform ultrasonic dispersion at a power of 25 kHz for 12 minutes to obtain a soluble metal salt solution with a total metal ion concentration of 0.115 mol / L ,spare;

[0059] (4) Add 1.5g of g-C 3 N 4 Add to soluble metal salt solution, ...

Embodiment 3

[0065] g-C 3 N 4 / metal hydroxide composite photocatalyst, is prepared by the reaction of 3.75g nitrogen-containing precursor (urea), 15.0g urea and 27.30g cobalt chloride;

[0066] g-C above 3 N 4 The preparation method of / metal hydroxide composite photocatalyst specifically comprises the following steps:

[0067] (1) Take each raw material by the above-mentioned consumption;

[0068] (2) Wrap 3.75g of nitrogen-containing precursor (urea) in tin foil, place it in a crucible, heat up to 480°C at a rate of 5°C / min, roast for 45.8h, and grind to obtain light yellow g-C 3 N 4 ,spare;

[0069] (3) Dissolve cobalt chloride and urea in 500 mL of distilled water, and perform ultrasonic dispersion for 15 min at a power of 30 kHz to obtain a soluble metal salt solution with a total metal ion concentration of 0.21 mol / L, for subsequent use;

[0070] (4) Add 2.0g of g-C 3 N 4 Add soluble metal salt solution, ultrasonically disperse at 30kHz for 15min, then place in an autoclave...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a g-C3N4 / metal hydroxide composite photocatalyst. The g-C3N4 / metal hydroxide composite photocatalyst is prepared by reacting a nitrogen-containing precursor, urea and soluble metal salt. A preparation method of the composite photocatalyst comprises the following steps: (1) weighing the raw materials; (2) roasting and grinding a nitrogen-containing precursor, so as to obtain g-C3N4; (3) dissolving soluble metal salt and urea in water, and performing ultrasonic dispersion; and (4) adding g-C3N4, and carrying out ultrasonic dispersion, heating reaction, centrifugation, washing, vacuum drying and grinding. G-C3N4 is taken as a main body material, metal hydroxide with a large specific surface area and g-C3N4 are simply and efficiently compounded to prepare the g-C3N4 / metal hydroxide composite photocatalyst, and heterojunction is formed between the metal hydroxide and g-C3N4 to promote separation of photo-induced electron-hole pairs, so that the g-C3N4 / metal hydroxide composite photocatalyst has higher Cr(VI) photocatalytic reduction capacity, and the composite photocatalyst has good application value in the aspect of environmental pollution remediation.

Description

technical field [0001] The invention relates to the technical field of photocatalysis and inorganic nanomaterials, more specifically to a g-C 3 N 4 / metal hydroxide composite photocatalyst and preparation method thereof. Background technique [0002] Chromium (Cr) and its derivatives are widely used in many fields of industrial production and are necessary raw materials for many industries. A large amount of Cr-containing wastewater will be generated during production or processing. In particular, the massive discharge of hexavalent chromium Cr(Ⅵ) industrial wastewater has caused serious environmental pollution and threatened human health. Semiconductor photocatalytic reduction of Cr(VI) to Cr(III) is considered to be a green technology that can solve environmental and energy problems, and the development of efficient visible light-responsive photocatalysts is the key to the application of photocatalytic reduction of Cr(VI). [0003] g-C 3 N 4 It is a typical polymer se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J27/24C02F1/30C02F1/70C02F101/22
CPCB01J27/24C02F1/30C02F1/705C02F2101/22C02F2305/10B01J35/39
Inventor 曾虹燕熊杰徐圣陈超荣彭迪阳
Owner XIANGTAN UNIV