Preparation method and application of hydroxyapatite nanowire sintered porous ceramic beads

A technology of hydroxyapatite and porous ceramics, which is applied in the field of preparation of hydroxyapatite nanowire sintered porous ceramic beads and hydroxyapatite nanowire sintered porous ceramic beads, which can solve the problems of low recovery efficiency and small macroscopic size of the carrier, etc. problem, to achieve the effect of adjustable porosity, high activity, and good distribution of AuNPs

Active Publication Date: 2021-09-21
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recycling of nanocarriers still attracts attention. Magnetic materials are used to support MNPs to improve recyclability. Wan developed one-dimensional magnetic mesoporous silica nanochains through a magnetic field-guided interfacial assembly process. AuNPs can be dispersed In the mesopores, the catalyst can be easily separated from the 4-NP reaction system and used for catalytic reactions. Although the magnetic separation capability is achieved, the macroscopic size of the carrier is still small, and there is still the problem of low recovery efficiency.

Method used

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  • Preparation method and application of hydroxyapatite nanowire sintered porous ceramic beads
  • Preparation method and application of hydroxyapatite nanowire sintered porous ceramic beads
  • Preparation method and application of hydroxyapatite nanowire sintered porous ceramic beads

Examples

Experimental program
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Effect test

Embodiment 1

[0071] This embodiment provides a porous ceramic microbead sintered with hydroxyapatite nanowires, and the anchor sites of the porous ceramic microbead are loaded with gold nanoparticles (AuNPs).

Embodiment 2

[0073] This embodiment provides a method for preparing porous ceramic microbeads sintered with hydroxyapatite nanowires. The specific preparation steps are:

[0074] S1, using a solvothermal method to synthesize hydroxyapatite nanowires (HN), specifically;

[0075] 1) 93.4g oleic acid, 135g water and 48g methanol were mixed uniformly to obtain mixture A;

[0076] 2) 10.5g sodium hydroxide was dissolved in 150mL water to obtain mixture B, 3.3g calcium chloride was dissolved in 150mL water to obtain mixture C, 7.3g anhydrous sodium dihydrogen phosphate was dissolved in 150mL water to obtain mixture D, Add mixture B, mixture C and mixture D to mixture A in turn to obtain a slurry, and the interval between each addition is 20 minutes;

[0077] 3) Pour the slurry into a 1L polytetrafluoroethylene autoclave and keep it at 180°C for 25h;

[0078] 4) The product is washed three times with ethanol and water respectively;

[0079] The preparation of S2, HN porous ceramic microbeads, ...

Embodiment 3

[0089] This example provides a method for preparing porous ceramic microbeads sintered with hydroxyapatite nanowires. The shrinkage product HN porous ceramic microbeads prepared has a HN concentration of 1.2 wt%.

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Abstract

The invention discloses a preparation method and application of hydroxyapatite nanowire sintered porous ceramic beads. A nanogold immobilized catalyst with good catalytic performance on nitrobenzene compounds is prepared by taking hydroxyapatite nanowire sintered porous ceramic beads as a carrier. The ceramic skeleton with abundant anchoring points can provide enough traction force to disperse the gold nanoparticles (AuNPs) and keep stability in the catalysis process, the prepared HN / AuNP particles are fully characterized by chemical composition, porosity, surface analysis and the like, the prepared HN / AuNP particles have the unique characteristics of micron-sized interconnected porous channels, adjustable porosity, good AuNPs distribution and the like, and in addition, the HN / AuNP catalyst particles have high activity for reducing and degrading 4-nitrophenol by sodium borohydride, the HN / AuNP particles can be recycled, and about 97% of the original activity of the HN / AuNP particles can be maintained even after 15 times of continuous reaction cycles.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and more specifically relates to hydroxyapatite nanowire sintered porous ceramic beads; the invention also relates to a preparation method and application of hydroxyapatite nanowire sintered porous ceramic beads. Background technique [0002] Clean water is crucial to human health and social development. The growing population and unrestrained industrial development have led to a serious shortage of drinking water resources. Heavy metal ions and harmful organic compounds released in large quantities from industrial activities are the main causes of water pollution. Reason, drinking contaminated water has caused serious health problems. In recent years, several water pollution treatment processes have been invented to solve this problem, such as adsorption, chemical oxidation, membrane filtration, and catalysis. Among these, catalysis has been proven to be a high-efficiency removal of harmful o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/447C04B35/622C04B35/626C04B38/00C04B41/88C02F1/70C02F101/38
CPCC04B35/447C04B35/622C04B35/626C04B38/00C04B41/88C04B41/009C04B41/5116C02F1/70C02F2101/38C04B41/4558
Inventor 郇伟伟李洁吴敏杰王步川李迎龙倪忠进
Owner ZHEJIANG FORESTRY UNIVERSITY
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