37results about How to "Fast electron transfer rate" patented technology

The present invention relates to the field of photoelectric material manufacturing, especially an optical metal-based modified gel and its preparation method and application. The following scheme is proposed. The preparation method includes adding a salt solution containing metal X ions to the CNS after the temperature has been programmed Stirring at constant temperature in the solution, CNS is synthesized by the following steps: the steps include first g-C 3 N 4 The powder is dispersed in water for ultrasonic peeling, and then centrifuged and dried to obtain CNS, the g-C 3 N 4 is synthesized through the following steps: the steps include selecting a compound containing a triazine structure as a reaction precursor, and calcining to obtain g-C 3 N 4 . The method proposed by the present invention and the optical metal-based modified gel prepared according to the method have high ECL strength, low cost, high photoelectric efficiency, good stability, large specific surface area, and fast electron transfer rate, which are used in optoelectronic devices. , labeling materials, molecular sensing and biomedical fields have broad application prospects.

The invention discloses a method for detecting the concentration of hydrogen peroxide in a solution, comprising: preparing an aminated reduced graphene oxide and a Pt metal modified electrode; preparing hydrogen peroxide standard solutions with different concentrations; The electrode is the working electrode, and the chronoamperometry is used to detect each part of the hydrogen peroxide standard solution in turn to obtain a chronoamperograph, record the concentration of each part of the hydrogen peroxide standard solution and its corresponding current intensity, and perform regression analysis to obtain the The relational equation between the concentration of hydrogen peroxide and the current intensity; obtain the corresponding current intensity of the buffer solution to be tested, and deduce the concentration of hydrogen peroxide in the buffer solution to be tested according to the relational equation between the concentration of hydrogen peroxide and the current intensity. The invention has the advantages of simple operation, high sensitivity, low detection limit and the like.

The invention discloses a preparation method of a composite photocell. In the invention, an electrophoretic deposition method is firstly used to prepare ordered CuO-rGO (Copper Oxide-Graphene) nano-film in FTO conductive glass, and then, by controlling the hydrolysis rate of Cu2 (OH) 2CO3 colloid to regulate the self-assembly process of CuO nano-particles in conductive glass, the hierarchical porous structure in CuO thin film can be effectively controlled and applied to solar cells. At the same time, the photovoltaic cell fabricated by conductive glass with grid groove structure on the upper surface can ensure the photovoltaic conversion efficiency of the photovoltaic cell and reduce the wear of the platinum counter electrode. The composite photovoltaic cell of the invention has a hierarchical porous structure, which can increase the path of light, improve the light capture efficiency and enhance the service life of the solar photovoltaic cell.

The invention discloses a titanium dioxide-carbon rod microelectrode, a preparation method and the application thereof for detecting the concentration of acetaminophen in blood. The electrode comprises a carbon rod and a copper wire, the carbon rod is connected with the copper wire through silver conducting adhesives, and titanium dioxide is loaded on the carbon rod. The preparation method comprises the steps that titanium powder and ammonium chloride powder which are evenly mixed are heated at high temperature to obtain the titanium dioxide, ultrasonic dispersion is performed on the titanium dioxide in deionized water, and finally one end of the carbon rod is fixed with the copper wire by using the conducting adhesives to obtain the carbon rod microelectrode modified by the titanium dioxide. The preparation raw materials of the titanium dioxide-carbon rod microelectrode are simple, easy to obtain, non-poisonous and environmental-friendly and low in cost; the modified electrode can be used for detecting the content of the acetaminophen in the blood, and has the advantages of being fast in response time, wide in linear range, low in detection limit, good in reproducibility and high in stability and the like.

The invention discloses the preparation and application of an ultra-thin two-dimensional layered composite photocatalytic material. After heating, heat preservation and natural cooling of urea, heating again, heat preservation, natural cooling and grinding, g-C is obtained. 3 N 4 nanosheets; the g‑C 3 N 4 Disperse the nanosheets in deionized water, then add graphene oxide solution, ultrasonically stir, cool to reflux, stir, after cooling, centrifuge and wash to obtain g‑C 3 N 4 / rGO complex; the In(NO 3 ) 3 ·5H 2 O, cetyltrimethylammonium bromide and thioacetamide were added to deionized water, stirred ultrasonically, and then added g‑C 3 N 4 / rGO composite, ultrasonic stirring, cooling and reflux, stirring, cooling, centrifugal washing, and vacuum drying to obtain an ultrathin two-dimensional layered composite photocatalytic material. The preparation method has a simple process, and the prepared photocatalytic material has a wide visible light response range, and has an efficient effect of degrading tetracycline hydrochloride under visible light irradiation.

The invention discloses a graphene-polypyrrole / platinum nano modified glassy carbon electrode and a preparation method for the same. The preparation method particularly includes the steps of polishing a glassy carbon electrode, and preparing a grapheme modified glassy carbon electrode, a graphene-polypyrrole modified glassy carbon electrode and the graphene-polypyrrole / platinum nano modified glassy carbon electrode. The obtained graphene-polypyrrole / platinum nano modified glassy carbon electrode is used as a catalyst for methanol oxidation in a methanol fuel cell. The graphene-polypyrrole / platinum nano modified glassy carbon electrode has the advantages of high dispersion, high catalytic activity and high anti-toxicity.

The invention discloses a method for quickly detecting concentration of tyrosine. The method comprises the following steps of (1) building a three-electrode system employing a glassy carbon electrode as a working electrode, measuring and recording differential pulse voltage-current curves of a plurality of PBS buffer solutions containing tyrosine of different concentration by using a differential pulse voltammetry separately and recording couponing voltage strength peaks; (2) drawing a standard curve and calculating a linear equation by employing the difference value between the voltage strength peak of each PBS buffer solution containing the tyrosine and the voltage strength peak of the PBS buffer solution free of the tyrosine as a vertical coordinate and the concentration of each part of tyrosine as a transverse coordinate; and (3) obtaining the voltage strength peak of a to-be-detected solution obtained in the step (1) and substituting the voltage strength peak into the liner equation to obtain the concentration of the tyrosine of the to-be-detected solution. The method has the advantages of being simple in operation, fast in detection and high in sensitivity, and high-sensitivity identification of the tyrosine in a mixed sample solution can be carried out.