Chromium-doped titanium oxygen cluster nano catalytic material, preparation method and applications thereof

A technology of nano-catalytic materials and titanium oxide clusters, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor quantum efficiency of photocatalysts and visible light absorption efficiency low cost, low detection limit and high degradation efficiency

Active Publication Date: 2020-04-10
河北地质大学
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  • Abstract
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Problems solved by technology

[0003] For the defects and deficiencies in the prior art, the object of the present invention is to provide a kind of chromium-doped titania cluster nano-catalyst material, preparation method and application , to solve the ecological pollution problem of tetracycline, the single-component photocatalyst has disadvantages such as poor quantum efficiency, poor visible light absorption efficiency, and easy light-induced charge combination, resulting in low photocatalytic performance.

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  • Chromium-doped titanium oxygen cluster nano catalytic material, preparation method and applications thereof
  • Chromium-doped titanium oxygen cluster nano catalytic material, preparation method and applications thereof

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preparation example Construction

[0028] The preparation method comprises the following steps:

[0029] Step 1: Mix and heat pivalic acid, tetrabutyl titanate and ethylene glycol to react to obtain titanyl cluster powder; the molar ratio of pivalic acid and tetrabutyl titanate is 1.8-2.2:1; the reaction temperature The temperature is 90~100℃, and the reaction time is 20~25h;

[0030] Step 2: adding titanyl cluster powder and chromium chloride to tetrabutyl titanate for ultrasonic dissolution, and reacting under boiling conditions to prepare chromium-doped titanyl cluster nanocatalytic material, the titanyl cluster powder and chromium chloride The mass ratio is 20:3.

[0031] In order to check the degradation effect of the chromium-doped titania cluster nano-catalyst material prepared by the method of the present invention on tetracycline organic pollutants in water, the photocatalytic degradation experiment method is as follows: 0.010g of chromium-doped titania cluster nanocatalyst The material was added to ...

Embodiment 1

[0034] According to the above-mentioned technical scheme, this embodiment provides the chromium-doped titania cluster nano-catalyst material, its preparation method and its application. The monocarboxylic acid kind used in the present embodiment is pivalic acid (PA), and metal salt is chromium salt, and chromium chloride specifically comprises the following steps:

[0035] Step 1: Mix 10.5mmol PA with 5mmolTi(OBu) 4 Mix, add 20ml of ethylene glycol and stir for 5min to obtain a mixed solution, heat the mixed solution at 98°C for 24h; then wash with anhydrous tetrahydrofuran three times, centrifuge and dry at 65°C to obtain powdery solid particles , that is, pure titanium oxide cluster nanocatalytic materials;

[0036] Step 2: Weigh 0.2g of titanyl cluster powder obtained in Step 1 and 0.03g of chromium chloride into 10-20mL tetrabutyl titanate for ultrasonic dissolution. The ultrasonic time is 30 minutes, and then boiled for 60 minutes. Then, it is centrifuged with deionized...

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Abstract

The invention discloses a chromium-doped titanium oxygen cluster nano catalytic material, a preparation method and applications thereof. The preparation method comprises the following steps: preparingtitanium oxygen cluster powder by taking pivalic acid as a precursor; and then adding the titanium oxygen cluster powder and chromium chloride into tetrabutyl titanate, carrying out ultrasonic dissolution, and reacting under a boiling condition to prepare the chromium-doped titanium oxygen cluster nano catalytic material, wherein a mass ratio of the titanium oxygen cluster powder to the chromiumchloride is (6-8):1. The chromium-doped composite titanium-oxygen cluster nano catalytic material prepared by the invention has the advantages of low technical cost, environmental friendliness, easiness in operation, high degradation efficiency and multiple types of degraded tetracycline, and overcomes the defects of poor quantum efficiency, poor visible light absorption efficiency, easiness in photo-induced charge combination and the like of the single-molecule photocatalyst. The titanium oxygen cluster compound has a large specific surface area, is easy to form a vacuum position under an illumination condition, has more pores and has high catalytic performance.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a chromium-doped titanium oxide cluster nano-catalyst material, a preparation method and an application. Background technique [0002] Titanium oxide cage (or heterometallic titanium oxide cage, hereinafter collectively referred to as titanium oxide cage), also known as titanium oxide cluster, is a monodisperse nano-molecular system, and its basic skeleton is a cage constructed of multiple titanium atoms connected to each other through oxygen bridges. Molecular clusters with a diameter between 0.5 and 2.0 nm. Titanium oxide cages can be regarded as a type of nano-titanium oxide with smaller size and organic functional groups on the surface, because it can produce a large number of holes to load pollutant molecules, and play a role in efficiently separating tetracycline pollutants from water bodies. So far, the research on nanocluster catalytic materials is relatively lackin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26B01J35/10C02F1/30C02F101/38
CPCB01J35/004B01J23/26B01J35/1004C02F1/30C02F2101/38C02F2305/10Y02W10/37
Inventor 周亚红李俊峰刘卓张海龙魏爱华王瑞高璐宁蔡依彤董子涵王馨怡
Owner 河北地质大学
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