A novel ternary composite visible light catalyst for efficient and stable treatment of hexavalent chromium wastewater and its synthesis method
A ternary compound and synthesis method technology, applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the separation efficiency and transmission rate of photogenerated electrons and holes Increase, photocatalytic performance is not high enough to achieve the effect of inhibiting photocorrosion, improving photocatalytic efficiency, enhancing separation and transmission
Active Publication Date: 2022-04-22
YANGZHOU UNIV
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, currently for g-C 3 N 4 The compound modification of the present invention mainly focuses on the binary heterojunction, which can only realize photogenerated electrons or photogenerated holes from g-C 3 N 4 Therefore, the separation efficiency and transport rate of photogenerated electrons and holes are limited, and the photocatalytic performance is not high enough.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0040] First, graphene / g-C 3 N 4 / Synthesis of polyaniline ternary complexes:
[0041] 1)g-C 3 N 4 Synthesis: 3g of melamine is heated from room temperature to 580 °C at a heating rate of 2.8 °C / min, and incubated at 580 °C for 5h, and then naturally cooled to room temperature.
[0042] 2) Polyaniline / g-C 3 N 4 Synthesis of binary complex: Weigh 50mg of polyaniline powder dissolved in 25ml N,N-dimethylformamide, and add 1g of the prepared g-C 3 N 4 Then sonicate for 1h and magnetically stir for 2h to disperse it evenly, and then heat and evaporate the N,N-dimethylformamide solvent at 145 °C.
[0043] 3) Graphene / g-C 3 N 4 / Synthesis of polyaniline ternary complexes:
[0044] Place 1 g of polyaniline / g-C 3 N 4 The binary complex, 10mg single-layer graphene oxide and 250mg ascorbic acid were mixed in 40ml deionized water, and then the mixture was sealed in a stainless steel high-pressure axe lined with 50ml PTFE at 90 °C for 10 h, to be cooled naturally to room temperature, the pr...
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
| Property | Measurement | Unit |
|---|---|---|
| band gap | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a ternary composite visible light catalyst and a synthesis method thereof. First, g-C is prepared by calcining melamine 3 N 4 ; then set g‑C 3 N 4 Mixing with N,N-dimethylformamide solution of polyaniline, ultrasonication, stirring and evaporation of solvent, polyaniline / g-C 3 N 4 Binary complex; then polyaniline / g‑C 3 N 4 The binary composite, monolayer graphene oxide, and ascorbic acid were mixed in deionized water, and the mixture was hydrothermally treated to produce graphene / g‑C 3 N 4 / Polyaniline ternary compound. The method is simple and easy, the raw materials are abundant and easy to obtain, no metals and metal compounds are used, and the cost is low. The obtained graphene / g-C 3 N 4 / Polyaniline ternary composite not only has high visible light catalytic activity for the reduction of hexavalent chromium in decorative chrome plating solution, but also has good photocatalytic stability and reusable performance, and can be used as a new visible light catalyst It is applied to efficiently and stably treat hexavalent chromium wastewater.
Description
Technical field [0001] The present invention belongs to the field of photocatalyst material technology, specifically relates to a visible light catalyst (graphene / g-C) efficient and stable treatment of hexavalent chromium wastewater 3 N 4 / polyaniline ternary complex) and synthesis method thereof. Background [0002] Chromium and its compounds are important raw materials for many industries, and statistics say that more than 10% of China's commodity varieties are related to chromium and its compounds. However, the production and use of chromium and its compounds also produces a large amount of wastewater containing hexavalent chromium. Due to its high toxicity, high water solubility and strong mobility, hexavalent chromium has been included in the blacklist of priority control pollutants in China. In contrast, trivalent chromium is not only less toxic, but also prone to precipitation Therefore, the common treatment of Cr(VI) in water is to reduce it to trivalent chromium. Ho...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C02F1/30C02F101/22
CPCB01J31/069C02F1/30C02F2305/10C02F2101/22B01J35/39
Inventor 张永才葛婷张芬
Owner YANGZHOU UNIV