Organic decoration nano-titanium column clay, and its prepn. method

A technology of pillared clay and nano-titanium, which is applied in the field of organically modified nano-titanium pillared clay and its preparation, can solve the problems of poor adsorption performance of hydrophobic organic pollutants, poor photocatalytic activity, difficult disposal and the like, and achieves post-processing solutions. Problems, the effect of a wide range of raw material sources

Inactive Publication Date: 2006-03-29
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic pillared clays are modified by surfactants to make them have good adsorption capacity for organic pollutants, but organic pillared clays have problems such as difficulty in disposal after adsorption saturation; while inorganic titanium pillared clays have strong hydrophilicity, Therefore, the adsorption performance of hydrophobic organic pollutants is poor, resulting in poor photocatalytic activity.

Method used

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  • Organic decoration nano-titanium column clay, and its prepn. method
  • Organic decoration nano-titanium column clay, and its prepn. method
  • Organic decoration nano-titanium column clay, and its prepn. method

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Experimental program
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Effect test

Embodiment 1

[0029] (1) taking bentonite as the synthetic matrix of organically modified nano-titanium pillared clay, and deionized water to form a suspension mixing system with a mass percentage of 5%, stirring and fully swelling for 24 hours;

[0030] (2) Add cationic surfactant hexadecyltrimethylammonium bromide (HDTMAB) to carry out ion exchange reaction in the suspended mixing system after swelling, the time is 48 hours, the molar ratio that adopts is HDTMAB: CEC=4 : 1, the reaction process is kept at a constant temperature of 60°C, and then the titanium sol (TiO 2 Sol) is added dropwise in the mixed system of bentonite and cationic surfactant to continue to react, and the molar ratio that adopts is Ti 4+ :CEC=20:1;TiO 2 The sol is prepared by the sol-gel method, using hydrochloric acid as the hydrolysis catalyst, butyl titanate as the precursor, and Ti 4+ :H + =1:4, prepared after aging for 4 hours;

[0031] (3) After the titanium sol in the mixed system is fully precipitated, it...

Embodiment 2

[0034] (1) Bentonite is used as the synthetic matrix of organically modified nano-titanium pillared clay, and deionized water is prepared into a suspension mixing system with a mass percentage of 0.1%, and the stirring is fully swollen for 36 hours;

[0035] (2) adding anionic surfactant sodium dodecylbenzenesulfonate (DBS) to the suspension mixing system after swelling and carrying out ion exchange reaction, the time is 12 hours, and the mol ratio that adopts is DBS: CEC=0.25: 1, The reaction process is maintained at a constant temperature of 65 ° C, and then the titanium sol (TiO 2 Sol) is added dropwise in the mixed system of bentonite and anionic surfactant to continue to react, and the molar ratio adopted is Ti 4+ :CEC=50:1;TiO 2 The sol is prepared by the sol-gel method, using hydrochloric acid as the hydrolysis catalyst, butyl titanate as the precursor, and Ti 4+ :H + =1:8, prepared after aging for 72 hours;

[0036] (3) After the titanium sol in the mixed system is...

Embodiment 3

[0039] (1) taking bentonite as the synthetic matrix of organically modified nano-titanium pillared clay, and deionized water to prepare a suspension mixing system with a mass percentage of 20%, stirring and fully swelling for 12 hours;

[0040] (2) add non-ionic surfactant polyvinyl alcohol (PVA) to the suspension mixing system after swelling and carry out ion exchange reaction, the time is 72 hours, the mol ratio that adopts is PVA: CEC=3: 1, and this reaction process keeps Constant temperature at 40°C, then titanium sol (Ti02 Sol) is added dropwise in bentonite and nonionic surfactant mixing system to continue to react, and the molar ratio that adopts is Ti 4+ :CEC=30:1;TiO 2 The sol was prepared by the sol-gel method, with acetic acid as the hydrolysis catalyst, butyl titanate as the precursor, and Ti 4+ :H + =1:0.5, prepared after aging for 0.5 hours;

[0041] (3) After the titanium sol in the mixed system is fully precipitated, centrifugally wash with water;

[0042] ...

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Abstract

A clay supported by organic substance modified nano-Ti is prepared through preparing suspension from bentone and water, proportionally adding surfactant, constant-temp ion exchange reaction, proportionally dripping Ti sol to generate deposit, centrifugal water washing, drying, sinter and grinding. Its advantages are high adsorptivity to hydrophobic pollutant and high photocatalytic activity.

Description

technical field [0001] The invention belongs to the field of molecular sieve catalytic materials, in particular to an organically modified nano-titanium pillared clay and a preparation method thereof. Background technique [0002] The removal of micro and trace organic pollutants (such as endocrine disruptors) in water has always been a difficult problem in water treatment technology. Since such pollutants exist in relatively low concentrations, in order to achieve effective treatment results, their enrichment and adsorption on the surface of the degradation matrix (such as catalysts, microbial populations, etc.) should be strengthened first, so that the two can be effectively contacted. , so that the degradable matrix can play its role. Therefore, the development of a high-efficiency adsorbent that can effectively adsorb trace organic pollutants in the environment, and at the same time make it a composite material for in-situ catalytic degradation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J31/02
Inventor 安太成丁雪军陈嘉鑫傅家谟盛国英
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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