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Attapulgite-graphite-like carbon nitride composite ceramic microfiltration membrane with photocatalytic performance and preparation method and application thereof

A technology of graphite phase carbon nitride and attapulgite, applied in ceramic products, chemical instruments and methods, applications, etc., can solve problems such as difficult dispersion, easy agglomeration, and difficult separation, so as to avoid agglomeration, avoid difficult separation, and realize Effect of Ceramic Membrane Pore Size

Active Publication Date: 2017-08-04
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in use, there are still disadvantages such as easy agglomeration in the preparation process and difficulty in dispersing and separating during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Preparation of Nano Attapulgite Modified by Titanate Coupling Agent

[0054] Soak 10 g of attapulgite in toluene containing 4wt% isopropyl tris(dioctylpyrophosphate acyloxy) titanate, the dosage of titanate coupling agent is 2.2% of the mass of attapulgite, and the soaking time is 6h, the temperature is 30°C; after modification, filter, wash and dry.

Embodiment 2

[0055] Example 2 Preparation of Ceramic Microfiltration Membrane

[0056] 1. Dry the attapulgite nano-attapulgite modified by titanate coupling agent at 105°C to constant weight, and crush it through a 200-mesh sieve; take 100g of pure water and put it in a conical flask, add 0.8g of melamine, and add 0.5g The modified nano-attapulgite is ultrasonicated for 10 minutes, fully stirred, heated to 81°C, stirred and refluxed for 2 hours, then added 0.8g of nano-alumina powder, 0.2g of polyethyleneimine, and 10g of methyl cellulose, and dispersed evenly by ultrasonic Finally, the attapulgite-graphite-like phase carbon nitride ceramic microfiltration membrane membrane-making liquid is prepared.

[0057] 2. On the self-made film coating device, the tubular alumina support is coated with a film for 40 seconds by dipping method, and the outer film is applied to obtain the attapulgite-graphite-like phase carbon nitride ceramic microfiltration membrane wet film .

[0058]3. The attapulg...

Embodiment 3

[0060] Example 3 Preparation of Microfiltration Membrane

[0061] 1. Dry the attapulgite nano-attapulgite modified by titanate coupling agent at 105°C to constant weight, and crush it through a 200-mesh sieve; take 100g of pure water and put it in a conical flask, add 0.8g of melamine, and add 0.5g The modified nano-attapulgite is ultrasonicated for 10 minutes, fully stirred, heated to 81°C, stirred and refluxed for 2 hours, then added 0.8g of nano-alumina powder, 0.2g of polyethyleneimine, and 10g of methyl cellulose, and dispersed evenly by ultrasonic Finally, the attapulgite-graphite-like phase carbon nitride ceramic microfiltration membrane membrane-making liquid is prepared.

[0062] 2. On the self-made film coating device, the tubular alumina support is coated with a film for 60 seconds by the dipping method, and the outer film is used to obtain the attapulgite-graphite-like carbon nitride ceramic microfiltration membrane wet film .

[0063] 3. The attapulgite-graphite...

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Abstract

The invention relates to an attapulgite-graphite-like carbon nitride composite ceramic microfiltration membrane with photocatalytic performance and a preparation method thereof and belongs to the field of ceramic membranes. The method comprises the steps of preparing casting solution slurry from titanate coupling agent modified attapulgite and melamine; and preparing a wet membrane of the ceramic microfiltration membrane through a dip-coating method, airing at a room temperature and roasting to prepare the attapulgite-graphite-like carbon nitride composite ceramic microfiltration membrane. A separation layer of the ceramic microfiltration membrane is prepared from attapulgite fibers and graphite-like carbon nitride and the attapulgite fibers are disorderly stacked into the separation layer, so that relatively large total porosity and superficial area are provided for the separation layer; coupling of photocatalysis and separation processes can be achieved by using the photocatalytic performance of the graphite-like carbon nitride, and self-cleaning of the membrane is achieved; and the graphite-like carbon nitride is uniformly and dispersedly immobilized on the surface of attapulgite of the membrane through the chemical bonding effect, so that the disadvantages that granular graphite-like carbon nitride is easy to aggregate, difficult to separate and difficult to reuse in the using process are effectively avoided.

Description

technical field [0001] The invention relates to an attapulgite-graphite-like carbon nitride composite ceramic microfiltration membrane with photocatalytic performance and a preparation method thereof, belonging to the technical field of membrane separation materials. Background technique [0002] With its excellent material properties (high temperature resistance, high pressure resistance, corrosion resistance, etc.), the ceramic membrane shows its unique advantages in many harsh application systems, and has become one of the fastest-growing and most promising varieties in the membrane field. It is an ideal membrane material for chemical and petrochemical applications. Compared with ceramic membranes prepared by oxide ceramic particles, separation membranes prepared on porous supports using ceramic fibers (such as titania fibers and alumina fibers) (X.B. Ke, H.Y. Zhu, X.P.Gao, et al. High-performance ceramic membranes with a separation layer of metal oxide nanofibers. Adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/14B01D71/02B01D69/12B01D67/00C04B38/08C04B35/10C04B35/622
CPCB01D61/147B01D69/125B01D71/02B01D2325/10C04B35/10C04B35/62218C04B38/08C04B2235/349C04B2235/3856C04B2235/48
Inventor 薛爱莲周守勇赵宜江魏东阳李梅生邢卫红吴飞跃张莉莉褚效中张艳黄进
Owner HUAIYIN TEACHERS COLLEGE
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