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Preparation method of BiPO4/3DNGH three-dimensional photoelectric functional nano material

A technology of nanomaterials and photoelectric functions, applied in the field of electrochemical detection, can solve problems such as damage to biomolecules, and achieve the effect of improving visible light absorption and excellent PEC activity

Pending Publication Date: 2020-04-10
江苏新时代农业科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

while BiPO 4 The wide bandgap (3.85eV) of the 3.0 makes them respond only to UV irradiation, which could potentially damage biomolecules.

Method used

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  • Preparation method of BiPO4/3DNGH three-dimensional photoelectric functional nano material
  • Preparation method of BiPO4/3DNGH three-dimensional photoelectric functional nano material
  • Preparation method of BiPO4/3DNGH three-dimensional photoelectric functional nano material

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Experimental program
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Effect test

Embodiment 1

[0026] BiPO 4 / Preparation of 3DNGH nanocomposites

[0027] A certain amount of GO powder was dispersed in 10 mL of H 2 O and sonicate to obtain a homogeneous suspension. Then, 0.5mmol Bi(NO 3 ) 3 ·5H 2 O, 0.5mmol NaH 2 PO 4 2H 2 O and 1.3 mmol glycine were sequentially added to the previously prepared suspension. After stirring for 1 h, the resulting brown suspension was transferred into a Teflon-lined autoclave and then reacted at 180 °C for 12 h. Finally, the synthesized hydrogel was washed several times with distilled water, and the wet hydrogel was freeze-dried to obtain BiPO 4 / 3DNGH optoelectronic functional nanomaterials.

Embodiment 2

[0029] Construction of photoelectrochemical sensors

[0030] To construct the Tc PEC aptamer sensor, 2.5×10 -6 mol L -1 The aptamer solution of Tc was drop-coated onto BiPO 4 On / 3DNGH / ITO, get aptamer / BiPO 4 / 3DNGH / ITO electrode, dry in ambient air and use 0.1molL -1 Rinse with PBS to remove unadsorbed aptamer. 20 μL of Tc solutions with various concentrations were drop-coated on the prepared aptamer / BiPO at room temperature 4 / 3DNGH / ITO electrode and incubated with 0.1mol L -1 The electrodes were rinsed thoroughly with PBS, followed by the corresponding PEC measurements.

[0031] figure 1 is the BiPO obtained in this example 4 / 3DNGH nanocomposite transmission electron microscope, as can be seen from the figure, when 3DNGH and BiPO 4 Composite to get BiPO 4 / 3DNGH photoelectric functional materials, showing a good cross-linked porous three-dimensional structure, and BiPO 4 Nanorods anchored on the 3DNGH surface; figure 2 (b) shows the prepared 3DNGH, BiPO, respe...

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Abstract

The invention relates to preparation of a BiPO4 / 3DNGH three-dimensional photoelectric functional nano material and a method for detecting tetracycline through aptamer sensing of the BiPO4 / 3DNGH three-dimensional photoelectric functional nano material, takes a photoelectrochemical technology as a detection means, and belongs to the technical field of photoelectrochemical sensing. A preparation method prepares the BiPO4 / 3DNGH three-dimensional photoelectric functional nano material with excellent visible light response for the first time by adopting a one-step hydrothermal method. The introduction of 3DNGH can effectively improve the visible light absorption of BiPO4, and compared with the original BiPO4 (3.85 eV), the energy band gap of BiPO4 / 3DNGH is greatly reduced to 2.1 eV. Compared with BiPO4, BiPO4 / reduced graphene (BiPO4 / rGO) and BiPO4 / nitrogen-doped graphene (BiPO4 / NG), the BiPO4 / 3DNGH photoelectric functional nano material prepared by the method has excellent PEC (PolyethyleneCarbonate) activity. Based on the excellent PEC performance of the BiPO4 / 3DNGH photoelectric functional nano material and the label-free aptamer as a biological recognition element, a label-free aptamer sensing platform is successfully constructed for Tc detection. The invention aims to provide the photoelectrochemical sensor which is simple in preparation process, flexible to use, high in sensitivity, low in detection cost and capable of realizing sensitive detection on Tc in an extremely short time.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, and refers to a construction method and application of a photoelectrochemical sensor for tetracycline detection. Background technique [0002] Tetracycline (Tc), one of the broad-spectrum antibiotics against Gram-negative and Gram-positive microorganisms, is widely used in human and animal therapy, as well as feed additives due to its low cost and high antimicrobial activity. Excessive use of Tc in agricultural production will accumulate in daily foods (such as milk and eggs), thereby endangering human health. The European Union (EU) has set the maximum residual levels (MRLs) of Tc at 6×10 in the liver -7 mol L -1 , 1.2×10-6mol L in the kidney -1 , 4×10 in eggs -7 moL -1 , milk or muscle tissue is 2 × 10 -7 mol L -1 [7]. In China, the MRLs of Tc are set at 1×10 -7 mol L -1 . Currently, various analytical methods have been developed for Tc detection, including high-performance l...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/327C01B32/194C01B25/37
CPCC01B25/37C01B32/194C01P2002/72C01P2004/04C01P2004/80G01N27/305G01N27/3276G01N27/3278Y02P20/133
Inventor 卢道庆王坤刘倩
Owner 江苏新时代农业科技有限责任公司
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