Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of Co/TiO2 nanotube array and application thereof in degradation of sugar wastewater

A nanotube array and wastewater technology, which is applied in catalyst activation/preparation, chemical instruments and methods, food industry wastewater treatment, etc., to achieve the effect of reducing treatment cost and time

Inactive Publication Date: 2011-01-19
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of cobalt-doped Co / TiO by ultrasonic method 2 Nanotube arrays and their successful use in photocatalytic degradation of sugar wastewater have not yet been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Prepare a titanium dioxide nanotube array on the surface of a 2cm*4cm*0.1cm titanium sheet by anodic oxidation, wash and dry it, put it in a muffle furnace at 500°C for 2 hours, cool it to room temperature, take it out and put it in 0.012mol / LCo (NO 3 ) 2 solution, soaked for 12 minutes under ultrasonic conditions at room temperature, and dried in the air to obtain Co / TiO 2 array of nanotubes. Co / TiO 2 The nanotube array was placed in 50mL of sugar wastewater, the pH of the wastewater was adjusted to 13 with NaOH, and the COD degradation efficiency reached 83.5% when irradiated with 253.6nm wavelength ultraviolet light for 20 hours. After 30 hours of light, the COD degradation efficiency reached 93.53%.

Embodiment 2

[0011] Prepare a titanium dioxide nanotube array on the surface of a 1cm*4cm*0.1cm titanium sheet by anodic oxidation, wash and dry it, put it in a muffle furnace at 500°C for 2 hours, cool to room temperature, take it out and put it in 0.012mol / LCo (NO 3 ) 2 solution, soaked for 12 minutes under ultrasonic conditions at room temperature, and dried in the air to obtain Co / TiO 2 array of nanotubes. Co / TiO 2 The nanotube array was placed in 25mL of sugar wastewater, the pH of the wastewater was adjusted to 12.5 with NaOH, and the COD degradation efficiency reached 86.4% when irradiated with 253.6nm wavelength ultraviolet light for 20 hours. After 30 hours of light, the COD degradation efficiency reached 95.04%.

Embodiment 3

[0013] Prepare a titanium dioxide nanotube array on the surface of a 3cm*4cm*0.1cm titanium sheet by anodic oxidation, wash and dry it, put it in a muffle furnace at a constant temperature of 500°C for 2 hours, cool it to room temperature, take it out and put it in 0.012mol / LCo (NO 3 ) 2 solution, soaked for 12 minutes under ultrasonic conditions at room temperature, and dried in the air to obtain Co / TiO 2 array of nanotubes. Co / TiO 2 The nanotube array was placed in 75mL of sugar wastewater, the pH value of the wastewater was adjusted to 13.5 with NaOH, and the COD degradation efficiency reached 84.5% when irradiated with 253.6nm wavelength ultraviolet light for 20 hours. After 30 hours of light, the COD degradation efficiency reached 94.18%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a Co / TiO2 nanotube array and application thereof in the degradation of sugar wastewater. The preparation method comprises the following steps of: preparing a uniform titanium dioxide nanotube array on the surface of a titanium sheet by utilizing an anodic oxidation method; placing the titanium sheet to a Muffle furnace at constant temperature of 500 DEG C for 2h after being cleaned and dried; taking out and cooling to room temperature; placing to 0.012mol / L of Co(NO3)2 solution to be soaked for 10 minutes under the ultrasonic condition; drying to prepare the Co / TiO2 nanotube array; adding the array to the sugar wastewater; and regulating the pH value to 12.5 to 13.5 by utilizing NaOH and irradiating for 20-30h under ultraviolet lights with the wavelength of 253.7nm to realize the application of the photocatalytic degradation of the sugar wastewater. The invention is mainly characterized in that the Co / TiO2 nanotube array is prepared from the titanium dioxide nanotube array prepared by the anodic oxidation method and by directly utilizing a simple ultrasonic soaking method; the Co / TiO2 nanotube array is applied to the photocatalytic degradation of the sugar wastewater; and the processing cost and the processing time of the sugar wastewater can be greatly reduced.

Description

technical field [0001] The present invention relates to Co / TiO 2 Preparation method of nanotube array and its application in the degradation of sugar wastewater. technical background [0002] Sugar industry wastewater is wastewater discharged from sugar beet or sugarcane as raw material. It mainly comes from the sugar production process and the comprehensive utilization process of sugar by-products. Wastewater generally contains organic matter and sugar, high COD and BOD, deep color, high nitrogen, phosphorus, potassium and other elements. Its main features are: high acidity, high concentration, deep color, and high toxicity. Once the waste water is discharged into the river water body, it will seriously damage the water body ecology. At present, the treatment of sugar wastewater at home and abroad mainly adopts the combination of physical and chemical methods and biochemical methods. That is, the waste water is pretreated by physical and chemical methods, and then ente...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/76B01J37/34B81B3/00C02F1/32C02F103/32
Inventor 钟福新林莎莎朱义年郭冬冬
Owner GUILIN UNIVERSITY OF TECHNOLOGY