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Near-infrared light response spring-shaped photoelectric detector for silk fibroin detection

A near-infrared photoresponse, photodetector technology, applied in the field of photoelectrochemical sensing, can solve the problems of mass spectrometry measurement error, complex composition, cumbersome and other problems, and achieve short diffusion distance, high carrier mobility, and increased dispersion. Effect

Pending Publication Date: 2022-06-24
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composition of ancient textiles is complex, and small changes in composition will lead to large errors in mass spectrometry. Moreover, the entire experimental process must go through experimental steps such as residue extraction, enzyme digestion, mass spectrometry, and result analysis, which is relatively cumbersome.

Method used

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  • Near-infrared light response spring-shaped photoelectric detector for silk fibroin detection

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Experimental program
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Effect test

Embodiment 1

[0036] Step 1: Extraction of silk fibroin: Dissolve 1 g of silkworm cocoons in 100 ml of 0.5% Na 2 CO 3 Boil in aqueous solution for 30 min, then rinse with distilled water for 3 times to completely remove sericin; dry the degummed silk fibers in a drying oven at 50 °C for 24 h; mix the dried silk fibroin fibers with 100 ml of calcium chloride at 98 °C Dissolve in the solution (the molar ratio of calcium chloride, ethanol and distilled water is 1:2:8) for 1.5h; use a dialysis bag (molecular weight cut-off, MWCO: 8000) to dialyze the dissolved mixed solution 10 times, and replace it every 3h Distilled water once; use a centrifuge (6000 r / min) to purify the obtained solution; finally take the supernatant to freeze-dry and grind to obtain silk fibroin.

[0037] Step 2: H-TiO 2 Preparation of nanoparticles: the pure TiO 2 Nanoparticles were annealed in a tube furnace at 550 °C with a mixture of hydrogen and argon (1:1 by volume) for 2 h to obtain H-TiO 2 Nanoparticles are avai...

Embodiment 2

[0046] Step 1: Extraction of silk fibroin: Dissolve 2 g silkworm cocoons in 110 ml of 0.5% Na 2 CO 3 Boil in aqueous solution for 35 min, then rinse with distilled water for 4 times to completely remove sericin; dry the degummed silk fibers in a drying oven at 55 °C for 27 h; dry the dried silk fibroin fibers in 100 ml calcium chloride at 98 °C Dissolve in the mixed solution (the molar ratio of calcium chloride, ethanol and distilled water is 1:2:8) for 1.5 h; use a dialysis bag (molecular weight cut-off, MWCO: 8000) to dialyze the dissolved mixed solution 13 times, every 3.5 h Replace distilled water once; use a centrifuge (7000 r / min) to purify the obtained solution; finally take the supernatant, freeze-dry, grind, and obtain silk fibroin.

[0047] Step 2: H-TiO 2 Preparation of nanoparticles: the pure TiO 2 Nanoparticles were annealed in a tube furnace at 550 °C with a mixture of hydrogen and argon (1:1 by volume) for 2 h to obtain H-TiO 2 Nanoparticles are available fo...

Embodiment 3

[0055] Step 1: Extraction of silk fibroin: Dissolve 3 g silkworm cocoons in 120 ml 0.5% Na 2 CO 3 Boil in aqueous solution for 40 min, then rinse with distilled water for 5 times to completely remove sericin; dry the degummed silk fibers in a drying oven at 60 °C for 30 h; dry the dried silk fibroin fibers in 100 ml calcium chloride at 98 °C Dissolve in the mixed solution (the molar ratio of calcium chloride, ethanol and distilled water is 1:2:8) for 2 h; use a dialysis bag (molecular weight cut-off, MWCO: 8000) to dialyze the dissolved mixed solution for 15 times, every 4 h Replace the distilled water once; use a centrifuge (8000 r / min) to purify the obtained solution; finally take the supernatant, freeze-dry, and grind to obtain silk fibroin.

[0056] Step 2: H-TiO 2 Preparation of nanoparticles: the pure TiO 2 Nanoparticles were annealed in a tube furnace at 550 °C with a mixture of hydrogen and argon (1:1 by volume) for 2.5 h to obtain H-TiO 2 Nanoparticles are availab...

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Abstract

The invention relates to the field of photoelectrochemical sensing, and discloses a near-infrared light response spring-shaped photoelectric detector for silk fibroin detection. The preparation method comprises the following steps: firstly, extracting silk fibroin and synthesizing H-TiO2, loading Ab2 on magnetic beads, and then preparing the photoelectric detector based on RGO / H-TiO2 / MoS2 through a layer-by-layer self-assembly process. The H-TiO2 nanoparticles are uniformly inserted between the graphene sheets which are in contact with each other to serve as light current, and the spring structure can promote light to penetrate through the interior of the spring and transfer of photo-induced electrons, so that the detector has high photosensitivity and photoelectric response. Meanwhile, the spring has a quick and recoverable shape memory characteristic and is high in sensitivity and stability in a salt solution; the optical excitation process is combined with electrochemical detection, so that the interference of background signals can be greatly reduced, and the sensitivity is high.

Description

technical field [0001] The invention relates to the field of photoelectrochemical sensing, in particular to a near-infrared light-responsive spring-shaped photodetector for silk fibroin detection. Background technique [0002] China has been a big country of textiles since ancient times. The textiles produced are rich in variety, exquisite in craftsmanship, comfortable and breathable. Among them, the most famous textile is Chinese silk, so China is also known as the "Silk Country". Silk cultural relics not only have the value of science and technology, culture, art and other aspects, but also the historical witnesses of social alternation and cultural blending. The main component of silk in silk cultural relics is mulberry silk, which is mainly composed of silk fibroin and sericin. Silk fibroin is the main component of silk, accounting for about 70% of the total weight. However, as an organic polymer material, mulberry silk in silk cultural relics is easily degraded by l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N27/327
CPCG01N21/359G01N27/3277G01N27/3278
Inventor 周晴晴王坤陈浩东王秉
Owner ZHEJIANG SCI-TECH UNIV
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