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TiO2/RGO aerogel, and preparation method and application of TiO2/RGO aerogel

A technology of airgel and graphene aerogel, applied in chemical instruments and methods, colloid chemistry, colloid chemistry, etc., can solve problems such as low efficiency, difficult separation and recovery, easy inactivation, etc., to achieve convenient separation and recovery, preparation The method is simple and easy to implement, and the effect of high reuse rate

Inactive Publication Date: 2014-12-24
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of TiO 2 / RGO airgel and its preparation method and application are intended to solve the problems of low efficiency, easy deactivation, and difficult separation and recovery of traditional photocatalysts in the adsorption and treatment of oily wastewater

Method used

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  • TiO2/RGO aerogel, and preparation method and application of TiO2/RGO aerogel
  • TiO2/RGO aerogel, and preparation method and application of TiO2/RGO aerogel
  • TiO2/RGO aerogel, and preparation method and application of TiO2/RGO aerogel

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Embodiment 1

[0022] TiO with efficient adsorption and photodegradation ability 2 / Preparation of RGO airgel

[0023] will TiOSO 4 Add 50 mL of an aqueous solution containing 200 mg of cysteine, stir vigorously at room temperature for 10-40 min, then add 20 mL of graphene oxide (5 mg / mL), transfer to a 100 mL hydrothermal kettle, and React at 100~160°C for 10~20 hours. After cooling, the product hydrogel is washed and freeze-dried to obtain the airgel, in which TiO 2 The loading is 14.3-76.9 wt%. figure 1 Demonstrated the different content of TiO of the present invention 2 / RGO airgel photos, indicating that good aerogels can be formed in this ratio range. figure 2 Demonstrating the TiO of the present invention 2 X-ray diffraction (XRD) pattern of / RGO airgel, from which it can be found that the prepared sample is TiO 2 and RGO complexes. image 3 TiO 2 / RGO and TiO 2 It can be seen from the figure that the absorption band edge of the composite photocatalyst has not changed, ind...

Embodiment 2

[0025] TiO 2 / RGO airgel adsorbs different kinds of organic solvents

[0026] Will get TiO 2 / RGO airgel is used to adsorb different types of organic solvents. Take the airgel and add it to a beaker filled with organic solvents. After the adsorption is saturated, take out the organic solvent drained from its surface and weigh the weight gain. TiO of the present invention 2 / RGO airgel adsorption of various organic solvents such as Image 6 As shown, the adsorption capacity of organic solvents can reach 43-120 times of its own mass.

Embodiment 3

[0028] TiO 2 / RGO Airgel Adsorption and Photocatalytic Degradation of Oleic Acid

[0029] Will get TiO 2 / RGO airgel is used for adsorption and photocatalytic degradation of oleic acid. Take samples and add them to the water body floating with oleic acid, and perform photocatalytic degradation under sunlight. The adsorption and photocatalytic degradation of oleic acid were detected by weight gain and infrared spectroscopy, respectively. TiO of the present invention 2 / RGO airgel adsorption and photocatalytic degradation of oleic acid by infrared (IR) comparison example Figure 7 shown. It can be observed from the figure that after the adsorption of oleic acid, the IR spectrum of the catalyst appears 2925~2850 cm -1 The absorption band is the typical C-H stretching vibration absorption peak of oleic acid, 1712 cm -1 It is the C=O stretching vibration absorption peak. Comparing the infrared spectra before and after the light, after 8 hours of sunlight, the corresponding pea...

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Abstract

The invention provides TiO2 / RGO aerogel, and a preparation method and application of the TiO2 / RGO aerogel, belonging to the technical fields of material preparation and environment purification. By adopting L-Cysteine as a reducing agent and a crosslinking agent, the TiO2 / RGO aerogel is prepared by loading TiO2 onto ROG aerogel by a simple one-step hydrothermal method for the first time, and the TiO2 / RGO aerogel has a macrostructure of which the diameter is 2.0cm and the height is 3.5mm. The prepared aerogel has high specific surface area, can efficiently adsorb oily wastewater and treat the oily wastewater in a photocatalysis manner, and is easy to separate and recycle. The preparation method is simple, is beneficial to large-scale industrial production, and has significant economic benefits and social benefits, and raw materials are cheap and easily available.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental purification, and in particular relates to a photocatalyst TiO for efficient adsorption and photocatalytic treatment of oily wastewater 2 / RGO airgel and preparation method thereof. Background technique [0002] The modification of inorganic powder is often the process of modifying the surface from hydrophilic to hydrophobic. For photocatalytically active TiO 2 material, one modification method is to change the TiO 2 The surface morphology structure, for example, Jin et al. synthesized TiO with micro-nano layered structure surface morphology by hydrothermal method 2 , the surface of this morphology structure has super hydrophilic / hydrophobic properties; Lin et al. prepared TiO by electrochemical anodic oxidation of titanium sheets. 2 A nanofiber tube array, the shape of the array has photocontrollable super-hydrophilic / hydrophobic properties. Another way to enha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J13/00C02F1/30
CPCY02W10/37
Inventor 李朝晖刘文君陈旬戴文新
Owner FUZHOU UNIV
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