Preparation method of cobalt sulfide nanotubes or nanowires based on porous anodic aluminum oxide template

An alumina template, porous anode technology, applied in chemical instruments and methods, inorganic chemistry, cobalt compounds, etc., can solve the problems of complex process, high cost, poor product controllability, etc., and achieve the effect of simple operation and low cost

Inactive Publication Date: 2011-01-19
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, cobalt sulfide nanowires can be prepared by spraying gold and electrochemical action on the basis of alumina template by electrochemical method, but the cost of this method is expensive.
Cobalt sulfide low-dimensional nanomaterials can also be prepared by means of sol-gel deposition and chemical vapor deposition, but the process is relatively complicated, the equipment requirements are high, and the product controllability is poor.
In short, there are many defects in the preparation of cobalt sulfide nanostructure materials by existing methods, and the requirements for equipment and process conditions are quite harsh, requiring high temperature, high vacuum and even huge electrochemical equipment.

Method used

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  • Preparation method of cobalt sulfide nanotubes or nanowires based on porous anodic aluminum oxide template
  • Preparation method of cobalt sulfide nanotubes or nanowires based on porous anodic aluminum oxide template
  • Preparation method of cobalt sulfide nanotubes or nanowires based on porous anodic aluminum oxide template

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The specific steps of preparation are as follows: first step, first place high-purity aluminum sheet (99.999%) in In the 0.3M oxalic acid solution, oxidize it at a DC voltage of 40V for 10h; then soak it in a mixed acid (containing 0.6M phosphoric acid and 0.15M chromic acid) at a temperature of 60°C for 10h, then put it again in the same process After the second anodic oxidation under the conditions for 24h. First use 1M copper chloride solution to remove the unoxidized aluminum on the back, and then use 0.5M phosphoric acid solution to etch the alumina barrier layer at the bottom of the hole to obtain a through-hole alumina template with aluminum surrounding it and a hole diameter of 60-70nm. In the second step, the alumina template is placed in a mixed solution of 2M cobalt chloride and thiourea (1:1) for ultrasonic treatment and then heated in steps. First, the temperature is set to 75 ° C, until precipitation occurs, and The temperature was raised to 90° C. with ...

Embodiment 2

[0032] After the temperature rose to 90°C, the reaction time was 60 minutes, and the others were the same as in Example 1. get as Figure 4 Cobalt sulfide nanowires shown.

Embodiment 3

[0034]The first step is the same as in Example 1. In the second step, the alumina template is placed in a mixed solution of 2.5M cobalt chloride and thiourea (1:1) for step-by-step heating, and the temperature is first set to 80°C until precipitation occurs, accompanied by gas After the generation, the temperature was raised to 100° C., and the reaction was carried out at this temperature for 20 minutes. Others are the same as embodiment 1. made approximately as shown in Figure 3, and as figure 2 , Figure 3c Cobalt sulfide nanotubes shown in the middle curve.

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Abstract

The invention discloses a preparation method of cobalt sulfide nanotubes or nanowires based on a porous anodic aluminum oxide template, which comprises the following steps: producing the porous aluminum oxide template; filling cobalt chloride and thiourea solution into holes of the aluminum oxide template; adopting the step-by-step heating method to prepare the cobalt sulfide nanotubes or the nanowires; and placing the aluminum oxide template in strong base solution for etching off the aluminum oxide template, and preparing the cobalt sulfide nanotubes or the nanowires with the controllable size, wherein the nanowires or the nanotubes are placed in the holes of the aluminum oxide template. The cobalt sulfide nanotubes or the nanowires have cheap raw materials, simple operation, short synthesis time and low temperature. The size of the cobalt sulfide nanotubes or the nanowires and the size of the holes of the template can be controlled and adjusted. The outer diameter of the holes of the cobalt sulfide nanotubes is 60-150nm, and the inner diameter is 20-80nm. The diameter of the nanowires is about 60-150nm. The invention relates to the method for preparing the cobalt sulfide nanotubes or the nanowires and an array thereof, which is relatively economical.

Description

technical field [0001] The invention relates to a method for sulfide semiconductor nanotubes and nanowires, in particular to a method for preparing cobalt sulfide nanotubes or nanowires at low temperature based on a porous anodized aluminum oxide template. That is, under normal pressure, a step-by-step heating method is used to prepare cobalt sulfide nanotubes, nanowires and their arrays in the holes of the porous anodized aluminum template. Background technique [0002] One-dimensional nanomaterials such as nanotubes and nanowires have developed rapidly due to their surface effects, quantum size effects, etc., which make them exhibit characteristics that conventional materials do not have in many aspects. It is used to manufacture a variety of micro-devices such as nano-electronic devices, optical waveguides and nano-analyzers. It can also be used in highly sensitive signal detectors for cancer diagnosis. The methods for preparing low-dimensional nanomaterials include: el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00
Inventor 陶峰王志俊
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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