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Preparation method of nanocellulose-ZnO conductive hybrid material having P/N heterojunction and used for rapid gas sensing

A nanocellulose, gas sensing technology, applied in the direction of zinc oxide/zinc hydroxide, oxide conductors, non-metallic conductors, etc., can solve the problems of poor anti-interference ability, low sensitivity, poor selectivity and stability, etc. The effects of stable electrical conductivity, high gas sensing accuracy and simple preparation method

Inactive Publication Date: 2019-08-02
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of gas sensing materials made of ZnO are also obvious, such as poor anti-interference ability to temperature and ambient temperature, low sensitivity, poor selectivity and stability

Method used

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  • Preparation method of nanocellulose-ZnO conductive hybrid material having P/N heterojunction and used for rapid gas sensing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 1g CNC to Zn(NO 3 ) 2 ·6H 2 O solution (0.1mol / L, 20mL) was mixed; the pH value of the mixture was adjusted to 12.5 using NaOH solution; the solution was transferred to a 50mL Teflon-lined stainless steel reactor and reacted at 80°C After 24 hours, the reactor was rapidly cooled to room temperature, centrifuged and washed with water to obtain the sample CNC-ZnO; 0.014g polyvinylpyrrolidone (PVP) and 0.12g CNC-ZnO were added to 1.4mL of ethanol deionized mixed solution (v / v= 9:1), add 0.14g of aniline and 1.5mL of HCl (0.1mol / L) to the mixed solution, and then sonicate for 10min; add 1.2mL of ammonium persulfate ((NH 4 ) 2 S 2 o 8 , 0.5g / mL), after 1h of reaction in the dark, washed several times with deionized water to finally obtain the CNC-ZnO conductive hybrid material.

Embodiment 2

[0033] Add 1g CNC to ZnCl 2 Solutions (0.01mol / L, 10mL) were mixed; the pH value of the mixture was adjusted to 9 using RbOH solution; the solution was transferred to a 50mL polytetrafluoroethylene-lined stainless steel reactor, and reacted at 45°C, After 12 hours, the reaction kettle was rapidly cooled to room temperature, centrifuged and washed with water to obtain the sample CNC-ZnO; 0.003g of PVP and 0.03g of CNC-ZnO were added to 5mL of ethanol deionized mixed solution (v / v=8:2), and mixed Add 0.01g pyrrole and 0.1mL H to the solution 2 SO 4 (1mol / L) and sonicate for 20min; add 0.01mL potassium persulfate (K 2 S 2 o 8 , 0.01g / mL), after reaction in the dark for 0.5h, washed several times with deionized water to finally obtain the CNC-ZnO conductive hybrid material.

Embodiment 3

[0035] Add 1g CNC to ZnSO 4 Solutions (1mol / L, 100mL) were mixed; the pH value of the mixture was adjusted to 15 using LiOH solution; the solution was transferred to a 50mL polytetrafluoroethylene-lined stainless steel reactor, and reacted at 95°C for 16 After one hour, the reaction kettle was rapidly cooled to room temperature, centrifuged and washed with water to obtain the sample CNC-ZnO; 0.05g PVP and 0.3g CNC-ZnO were added to 0.5mL ethanol deionized mixed solution (v / v=7:3), and mixed Add 5g thiophene and 10mL HClO to the solution 4 (5mol / L) and sonicate for 30min; add 3mL sodium persulfate (Na 2 S 2 o 8 , 5g / mL), after 2h of reaction in the dark, washed several times with deionized water to finally obtain the CNC-ZnO conductive hybrid material.

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Abstract

The invention provides a preparation method of a nanocellulose-ZnO conductive hybrid material having a P / N heterojunction and used for rapid gas sensing. The method is characterized in that CNC (cellulose nanocrystaline)-ZnO are adopted as a template, conductive monomers are added in a low-temperature acid state, then, persulfate is slowly dropwise added, and the hybrid material with CNC-ZnO coated with a conductive polymer is produced by in-situ oxidation polymerization. The material has high strength and biocompatibility of CNC and conductivity of the conductive polymer and also has excellent stability, specific controllable heterojunction structure and morphology, good luminescence and photoelectric conversion efficiency. The material has wide application prospects in the fields of gassensing, photocatalysis, gas sensitive materials, photoelectric conversion and supercapacitors.

Description

technical field [0001] The invention relates to a preparation method of a cellulose nanocrystal hybrid material, in particular to a preparation method of a P / N heterojunction and rapid gas sensing nano-cellulose zinc oxide conductive hybrid material, belonging to the field of polymer materials. Background technique [0002] In recent years, with the rapid development of human beings, fossil energy, mainly oil, coal and natural gas, has been consumed by humans in large quantities, and the reserves of fossil energy have declined sharply and are non-renewable, and even an energy crisis has emerged. More seriously, with the consumption of fossil energy, a large amount of greenhouse gas carbon dioxide is produced, which leads to global warming. In addition, with the rapid development of society and people's requirements for high-quality life, the sensing and monitoring of toxic gases produced by urban furniture decoration, toxic exhaust gas from automobiles, and small molecules o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08L79/04C08L65/00C08L39/06C08L1/02C08K3/22C08G73/06C08G73/02C08G61/12C01G9/02H01B1/08
CPCC01G9/02C08G61/126C08G73/0266C08G73/0611C08G2261/11C08G2261/18C08G2261/3223C08G2261/51C08K2003/2296C08L1/02C08L65/00C08L79/02C08L2205/03H01B1/08C08L39/06C08K3/22C08L79/04
Inventor 余厚咏唐峰王妍妍关莹杨丽丽张宇杰周颖
Owner ZHEJIANG SCI-TECH UNIV
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