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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 problem of small macroscopic size of the carrier and low recovery efficiency, etc. problem, to achieve the effect of adjustable porosity, high activity, and good distribution of AuNPs

Active Publication Date: 2022-07-19
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 enhance 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

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Embodiment 1

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

Embodiment 2

[0073] This embodiment provides a preparation method of hydroxyapatite nanowire sintered porous ceramic microbeads, and the specific preparation steps are as follows:

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

[0075] 1) Mix 93.4g of oleic acid, 135g of water and 48g of methanol 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 successively to obtain slurry, and the interval time of each addition is 20min;

[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 and HN porous ceramic microbeads ...

Embodiment 3

[0089] This embodiment provides a preparation method of hydroxyapatite nanowire sintered porous ceramic microbeads, and the prepared shrinkage product HN porous ceramic microbeads 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. Nano gold with good catalytic performance for nitrobenzene compounds is prepared by using hydroxyapatite nanowire sintered porous ceramic microbeads as a carrier Immobilized catalysts, ceramic frameworks with abundant anchoring sites can provide sufficient traction to disperse gold nanoparticles (AuNPs) and maintain stability during the catalytic process. The prepared HN / AuNP particles were analyzed by chemical composition, porosity, and surface analysis. It has been fully characterized, indicating that it has unique characteristics such as micron-scale interconnected porous channels, adjustable porosity, and good distribution of AuNPs. In addition, the HN / AuNP catalyst particles have high reductive degradation of 4-nitrophenol by sodium borohydride. Activity, HN / AuNP particles can be recycled and retain about 97% of their original activity even after 15 consecutive reaction cycles.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, 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 vital to human health and social development. The growing population and uncontrolled industrial development have led to a serious shortage of drinking water resources. Heavy metal ions and harmful organic compounds released in large quantities in industrial activities are the main sources of water pollution. Because of this, drinking contaminated water causes 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 proved to be a highly efficient removal of harmful or...

Claims

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Application Information

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Patent Type & Authority Patents(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