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A kind of titanium ethylene glycol nanometer material and its preparation method and application

A nanomaterial, ethylene glycol titanium technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the complex preparation technology, difficult to remove trivalent arsenic species, slow adsorption kinetics and other problems, to achieve the effects of environmental friendliness, stable morphology and structure, and economical raw materials

Active Publication Date: 2019-08-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This means that most nanomaterials composed of positively charged metal oxides or hydroxides can effectively remove negatively charged As(V) ions by electrostatic adsorption, but it is difficult to remove neutral trivalent arsenic species.
[0003] In order to improve the removal efficiency of trivalent arsenic, one suggestion is to convert trivalent arsenic to pentavalent arsenic by electron transfer before treatment; another approach is to design composite nanomaterials in which both cations can be adsorbed Heavy metals can also adsorb heavy metals with anions, but the above-mentioned techniques are either too complicated to prepare, or the adsorption kinetics are too slow

Method used

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  • A kind of titanium ethylene glycol nanometer material and its preparation method and application
  • A kind of titanium ethylene glycol nanometer material and its preparation method and application
  • A kind of titanium ethylene glycol nanometer material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1, the preparation of titanium ethylene glycol nanomaterial

[0042] Take 500 μL tetrabutyl titanate Ti(OC 4 h 9 ) 4 Dissolve in 60mL of ethylene glycol, and stir at room temperature (25°C) until a clear solution is formed, then transfer this solution to a 100mL Teflon-lined autoclave, at 160°C at Stir vigorously for 8h. After naturally cooling to room temperature, the precipitated solid was collected through a PTFE membrane (pore size: 0.22 μm), and washed with distilled water and ethanol three times each. The solid obtained after washing was dried in a vacuum oven at 70° C. for 12 hours to obtain a white solid powder of titanium ethylene glycol, which is the titanium ethylene glycol nanomaterial of the present invention.

[0043] The characterization of titanium ethylene glycol nanomaterial of the present invention: analyze and determine the structure of titanium ethylene glycol with powder X-ray diffractometer (CuK ray), the result is as follows figur...

Embodiment 2

[0045] Example 2, Titanium Ethylene Glycol Nanomaterial Adsorption of Pb in Water 2+ ion

[0046] With lead nitrate (Pb(NO 3 ) 2 ) and deionized water to configure lead ions (Pb 2+ ) concentrations are respectively 10, 20, 50, 100, 200 and 300 mg / L lead ion solutions for subsequent use.

[0047] In the adsorption rate experiment, the initial ion concentration was 10 mg L -1 , the sample dose is 20mg / 100mL. Measure 8mL of Pb with different concentrations each time 2+ aqueous solution, and then add the titanium ethylene glycol nanomaterial prepared in Example 1 of the present invention to it under stirring condition. The mixed solution was filtered and separated using a 0.22 μm PTFE membrane. For the adsorption isotherm, 5 mg of mesoporous titanium glycolate was used, and 25 mL of solutions with different concentrations were added under stirring (the specific concentrations were 10, 20, 50, 100, 200 and 300 mg / L, respectively). Detection of Remaining Pb in Solution Using...

Embodiment 3

[0048] Example 3, titanium ethylene glycol nanomaterials adsorb As(V) ions in water

[0049] Sodium arsenate Na 2 HASO 4 .7H 2 O and deionized water are used to prepare pentavalent arsenic ion solutions with As(V) ion concentrations of 10-300 mg / L respectively, and the initial pH value of the solution is adjusted to 4 with 0.2M hydrochloric acid.

[0050] In the adsorption rate experiment, the initial ion concentration was 10 mg L -1 , the sample dose is 20mg / 100mL. Each time, 8 mL of As(V) aqueous solution with different concentrations was measured, and then the titanium ethylene glycol nanomaterial prepared in Example 1 was added thereto under stirring condition. The mixed solution was filtered and separated using a 0.22 μm PTFE membrane. For the adsorption isotherm, 5 mg of mesoporous titanium glycolate was used, and 25 ml of solutions of different concentrations were added under stirring. Inductively coupled plasma atomic emission spectrometry was used to detect the ...

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Abstract

The invention discloses a titanium glycolate nano material and a preparation method and application thereof. The preparation method includes the following steps that a titanium containing compound is dissolved in ethylene glycol, and hydrothermal synthesis reaction is performed to obtain the titanium glycolate nano material. The titanium glycolate nano material can not only absorb heavy metal cations, but also can absorb heavy metal anions. In addition, the preparation method is safe, simple, low in cost and environmentally friendly.

Description

technical field [0001] The invention relates to a nanometer material of titanium ethylene glycol and its preparation method and application. Background technique [0002] Nanomaterial adsorbents have shown unique advantages in removing heavy metal pollutants in drinking water treatment, because nanomaterials usually have a large specific surface area and abundant active sites, which can selectively absorb some specific heavy metals. With the development of society, the chemical forms of heavy metals in water are more and more diversified. Most of the heavy metals in the form of hydrated metal cations, such as mercury, lead, thallium, etc., are relatively easy to deal with. However, for heavy metal pollutants such as arsenic, selenium, and tellurium, which have multiple chemical forms, their existence modes are very different under different pH conditions, and it is difficult to achieve simultaneous removal by simple adsorption at this time. For example, in the pH range of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 王春儒韩伟蒋礼杨秀林
Owner INST OF CHEM CHINESE ACAD OF SCI