A sensitive and reliable dopamine biosensor was developed based on the Au@carbon dots–chitosan composite film

Silk sericin/chitosan composite films were successfully prepared for possible future wound dressing applications. To prepare the chitosan, shrimp shells were first washed and finely ground to obtain a fine powder before extracting the chitosan using a chemical reaction method. The sericin was extracted from Thai raw cocoons of Bombyx mori silk worm via boiling and drying. To prepare the silk sericin/chitosan composite films, the silk sericin and chitosan solutions with varying volume ratios were mixed in a magnetic stirrer for 30 minutes. They were then dropped on to a plastic mold. The sample was dried at a temperature of 50 °C. The prepared composite films were characterized using UV-VIS spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The results from our studies could provide a method for future composite film development.

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Construction of an amperometric glucose biosensor based on the immobilization of glucose oxidase onto electrodeposited Pt nanoparticles-chitosan composite film

Bioprocess and Biosystems Engineering ◽

10.1007/s00449-012-0693-5 ◽

2012 ◽

Vol 35 (7) ◽

pp. 1089-1095 ◽

Cited By ~ 14

Author(s):

Jingjing Li ◽

Ruo Yuan ◽

Yaqin Chai ◽

Xin Che ◽

Wenjuan Li

Keyword(s):

Composite Film ◽

Glucose Oxidase ◽

Pt Nanoparticles ◽

Glucose Biosensor ◽

Chitosan Composite

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Fabrication of graphene quantum dots/chitosan composite film and its catalytic reduction for 4-nitrophenol

Ferroelectrics ◽

10.1080/00150193.2019.1592519 ◽

2019 ◽

Vol 548 (1) ◽

pp. 124-132

Author(s):

Lansheng Wei ◽

Jihai Cai ◽

Xiaoyun Li ◽

Xiaoying Wang

Keyword(s):

Quantum Dots ◽

Composite Film ◽

Catalytic Reduction ◽

Graphene Quantum Dots ◽

Chitosan Composite

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Sustainable Development of Enhanced Luminescence Polymer-Carbon Dots Composite Film for Rapid Cd2+ Removal from Wastewater

Molecules ◽

10.3390/molecules25153541 ◽

2020 ◽

Vol 25 (15) ◽

pp. 3541

Author(s):

Mohammed Abdullah Issa ◽

Zurina Z. Abidin

Keyword(s):

Composite Film ◽

Removal Efficiency ◽

Carbon Dots ◽

Isotherm Models ◽

Synthetic Approach ◽

Blue Color ◽

Order Kinetic ◽

Cds Film ◽

Doped Carbon Dots ◽

Nitrogen Doped Carbon

As a remedy for environmental pollution, a versatile synthetic approach has been developed to prepare polyvinyl alcohol (PVA)/nitrogen-doped carbon dots (CDs) composite film (PVA-CDs) for removal of toxic cadmium ions. The CDs were first synthesized using carboxymethylcellulose (CMC) of oil palms empty fruit bunch wastes with the addition of polyethyleneimine (PEI) and then the CDs were embedded with PVA. The PVA-CDs film possess synergistic functionalities through increasing the content of hydrogen bonds for chemisorption compared to the pure CDs. Optical analysis of PVA-CDs film was performed by ultraviolet-visible and fluorescence spectroscopy. Compared to the pure CDs, the solid-state PVA-CDs displayed a bright blue color with a quantum yield (QY) of 47%; they possess excitation-independent emission and a higher Cd2+ removal efficiency of 91.1%. The equilibrium state was achieved within 10 min. It was found that adsorption data fit well with the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption uptake was 113.6 mg g−1 at an optimal pH of 7. Desorption experiments showhe that adsorbent can be reused fruitfully for five adsorption-desorption cycles using 0.1 HCl elution. The film was successfully applied to real water samples with a removal efficiency of 95.34% and 90.9% for tap and drinking water, respectively. The fabricated membrane is biodegradable and its preparation follows an ecofriendly green route.

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