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Anion resin-based loaded CdS composite material and preparation method thereof

An anion resin, composite material technology, applied in chemical instruments and methods, catalyst activation/preparation, ion-exchange water/sewage treatment, etc., can solve the loss of active components, adsorption of anionic pollutants and poor in-situ photocatalytic degradation efficiency problem, to achieve the effect of promoting photocatalytic degradation and increasing pre-concentration capacity

Inactive Publication Date: 2012-08-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the relatively poor adsorption and in-situ photocatalytic degradation efficiency of the existing resin-based loaded CdS nanomaterials with resin as the matrix for anionic pollutants in water, the purpose of the present invention is to provide an anionic resin-based loaded CdS composite material and Its preparation method can solve the problem of large loss of active components in the subsequent separation and recovery of CdS powder, and prepare an anionic resin-based loaded CdS composite material, which provides support for the wide application of CdS photocatalysis in actual water treatment

Method used

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  • Anion resin-based loaded CdS composite material and preparation method thereof
  • Anion resin-based loaded CdS composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] CdCl 2 , HCl, NaCl to prepare 100mL solution A, in which CdCl 2 The concentration is 0.05mol / L, the concentration of HCl is 2mol / L, and the concentration of NaCl is 2mol / L.

[0027] 5gNa 2 S·9H 2 O was dissolved in 100 mL of water to obtain solution B.

[0028] Weigh 0.5g of Purolite A500 (containing quaternary amino groups, produced by Purolite, USA) resin in a conical flask, add solution A therein, shake at 30°C for 24 hours, CdCl 4 2- Ions are introduced into the inner and outer surfaces of the resin by ion exchange. The resin was filtered off, solution B was added thereto, and shaken at 30° C. for 24 hours to generate CdS precipitate. Filter the resin, wash it with water, put it into the reaction kettle, add 30mL 1.0M Na 2 S aqueous solution, heated at 40°C for 48 hours. The reacted resin is filtered, washed with water, washed with alcohol, and dried to obtain the anion resin-based loaded CdS composite material. The CdS load of the material is 21.8% by weig...

Embodiment 2

[0031] CdCl 2 , HCl, NaCl to prepare 100mL solution A, in which CdCl 2 The concentration is 0.05mol / L, the concentration of HCl is 1mol / L, and the concentration of NaCl is 2mol / L.

[0032] 5gNa 2 S·9H 2 O was dissolved in 100 mL of water to obtain solution B.

[0033] Weigh 0.5g of Purolite C-100 (containing quaternary amino groups, produced by Purolite, USA) resin in a conical flask, add solution A therein, shake at 30°C for 24 hours, CdCl 4 2- Ions are introduced into the inner and outer surfaces of the resin by ion exchange. The resin was filtered off, solution B was added thereto, and shaken at 30° C. for 24 hours to generate CdS precipitate. Filter the resin, wash it with water, put it into the reaction kettle, add 30mL 1.0M Na 2S aqueous solution, heated at 40°C for 96 hours. The reacted resin is filtered, washed with water, washed with alcohol, and dried to obtain the anion resin-based loaded CdS composite material. The CdS load of the material is 21.5% by weig...

Embodiment 3

[0036] CdCl 2 , HCl, NaCl, and ethanol to make 100mL solution A, in which CdCl 2 The concentration is 0.05 mol / L, the concentration of HCl is 1 mol / L, the concentration of NaCl is 0.5 mol / L, and the ratio of ethanol to water is 0.25 (volume ratio).

[0037] 5gNa 2 S·9H 2 O was dissolved in 100 mL of water to obtain solution B.

[0038] Weigh 0.5g of Amberlite IRA-958 (containing quaternary amino group, acrylic acid skeleton, produced by Rohm Hass, USA) resin in a conical flask, add solution A therein, shake at 30°C for 24 hours, CdCl 4 2- Ions are introduced into the inner and outer surfaces of the resin by ion exchange. The resin was filtered off, solution B was added thereto, and shaken at 30° C. for 24 hours to generate CdS precipitate. Filter the resin, wash it with water, put it into the reaction kettle, add 30mL 1.0M Na 2 S aqueous solution, heated at 40°C for 96 hours. The reacted resin is filtered, washed with water, washed with alcohol, and dried to obtain the...

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Abstract

The invention discloses an anion resin-based loaded CdS composite material and a preparation method thereof, which belongs to the field of resin nano materials. The anion resin-based loaded CdS composite material is in the basic structure that a carrier of the composite material is anion exchange and absorbent resin with alkaline functional groups; CdS nano particles are fixedly loaded on the inner and the outer surfaces of the carrier, and the fixedly loaded CdS nano particles are in a crystal structure. The preparation method comprises the following steps of: leading CdCl42-ions into the inner and the outer surfaces of carrier resin through an anion exchange action; depositing the CdCl42-ions led into the inner and the outer surfaces of the carrier resin into CdS through a Na2S or (NH4)2S solution; and filtering out, putting into a reaction kettle, heating in water, washing and drying to obtain the anion resin-based CdS composite material. The invention can solve the problem of larger active ingredient loss in the subsequent separation and reclamation processes of CdS powder, and improves the preenrichment capability for anion pollutants in a water body, thereby promoting photocatalytic degradation, and finally realizing the wide application of the anion resin-based loaded CdS composite material in actual water treatment.

Description

technical field [0001] The invention relates to a composite functional material with adsorption enrichment and in-situ photocatalysis effects and a preparation method thereof, more specifically a resin-based loaded CdS composite material with anion exchange resin as a matrix and a preparation method thereof. Background technique [0002] Semiconductor photocatalysis can not only degrade harmful organic substances in the environment into CO 2 and H 2 O, and can oxidize and remove low concentrations of NOx and sulfur-containing compounds (such as H in the atmosphere) 2 S, SO 2 ) and other toxic gases. In addition, the photocatalyst also has the functions of sterilization, deodorization, anti-fog and self-cleaning. It has become a new technology for environmental pollution control that has received increasing attention in recent years. Among the studied photocatalysts, CdS has a small absorption band gap (2.4eV), which is beneficial to the direct absorption and utilization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26B01J37/00B01J20/26C02F1/42C02F1/30
Inventor 吕路谢英梅潘丙才张炜铭李明慧张全兴
Owner NANJING UNIV
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