5 results about "Cadmium acetate" patented technology

The application discloses a kind of Bi 12 O 17 Cl2 / ZnCdS heterojunction photocatalyst and its preparation method and application, belong to photocatalyst field, solve the problem of CdS-based photocatalyst degradation efficiency limited.For preparation method:Bi (NO3) 3·5H2O, KCl and NH4Cl are dissolved in ethylene glycol solution, adjust pH to 8-10, carry out hydrothermal reaction, product calcination, Bi 12 O 17 Cl2 precursor is obtained;Bi 12 O 17 Cl2 precursor is dispersed in deionized water, zinc acetate dihydrate, cadmium acetate dihydrate and Na2S·9H2O solution are sequentially added, so that it is fully contacted with Bi 12 O 17 Cl2, adjust pH to 9-11, carry out hydrothermal reaction.The application not only overcomes the problems of insufficient light response, serious photo-corrosion and carrier recombination in the existing heterojunction system, but also shows unique advantages in stability and degradation efficiency.

This invention discloses a ZnCdS / APF composite photocatalyst, its preparation method, and its application, belonging to the field of photocatalysis technology. The composite photocatalyst uses a ZnCdS solid solution as the light-absorbing core and aminophenol-formaldehyde resin (APF) as the interface modification layer. The two are polymerized in situ to form a tight heterojunction. This invention uses zinc acetate, cadmium acetate, and thioacetamide as precursors to synthesize ZnCdS via ethylenediamine-assisted hydrothermal synthesis; then, using 3-aminophenol and formaldehyde as monomers, APF is grown in situ on the ZnCdS surface under ammonia catalysis, followed by washing and drying to obtain the final product. This preparation process is mild, requires no precious metals, and is easily scalable. The composite photocatalyst achieves a photocatalytic hydrogen peroxide production rate of up to 5318 μmol g under visible light irradiation and an oxygen atmosphere. ‑1 h ‑1 Compared to pure ZnCdS (2983 μmol g), ‑1 h ‑1 The photocatalyst exhibits a 78.3% improvement in light absorption capacity, carrier separation efficiency, and photoelectrochemical performance, all significantly superior to the pure-phase material. Characterization results, including SEM, UV-vis DRS, Mott-Schottky, EIS, and transient photocurrent response, confirm the synergistic enhancement effect of APF on ZnCdS. This composite photocatalyst shows broad application prospects in the green synthesis of H2O2.

This invention relates to the preparation and application of a carbon quantum dot-modified zinc cadmium selenide (ZNDS) sulfide with an embedded dual-field superhydrophilic photocatalyst for hydrogen production via water splitting, belonging to the field of photocatalytic hydrogen production technology. The invention uses citric acid and urea as raw materials to prepare hydrophilic carbon quantum dots via a hydrothermal method. Then, zinc acetate dihydrate, cadmium acetate dihydrate, thioacetamide, and a selenium powder-hydrazine hydrate solution are added to the carbon quantum dot system to achieve the preparation of an amide-bonded carbon quantum dot-modified ZNDS sulfide with an embedded dual-field superhydrophilic photocatalyst via a one-step hydrothermal method. The invention also discloses the application of this photocatalyst in hydrogen production via water splitting. Under the synergistic effect of multiple charge transport channels and photocatalysis-thermal catalysis, the photocatalyst significantly improves the directional separation and migration efficiency of photogenerated carriers, achieving a hydrogen production rate of 103.9~126.8 mmol·g under light-driven and thermally assisted conditions. cat ‑1 ·h ‑1 Furthermore, after eight consecutive uses, the photocatalytic activity remained above 91%. Therefore, the prepared photocatalyst has enormous potential for photocatalytic hydrogen production applications.

This invention discloses a method for preparing a photocatalyst for the C-C coupling conversion of methanol to ethylene glycol and its application. Zinc acetate dihydrate, indium chloride tetrahydrate, and thioacetamide, as well as zinc acetate dihydrate, cadmium acetate dihydrate, and thioacetamide, are used in a hydrothermal process to generate ZnIn2S4 nanosheets and Zn... 0.5 Cd 0.5 S nanorods were then electrostatically assembled to form a heterojunction structure. An aqueous nickel chloride solution was added during the reaction to form a nickel-modified ZnIn2S4 / Zn nanorod. 0.5 Cd 0.5 S-heterojunction solid catalyst. This invention prepares a highly active photocatalytic catalyst for the conversion of methanol to ethylene glycol through electrostatic assembly and photoreduction.

This invention discloses a ternary composite photocatalyst containing carbon quantum dots, its preparation method, and its applications. The ternary composite photocatalyst is prepared in a one-pot process using graphitic carbon nitride, carbon quantum dots, cadmium acetate, zinc acetate, and thiourea via a high-temperature oil bath method. This series of photocatalysts can catalyze the degradation of the antibiotic tetracycline hydrochloride under visible light irradiation; it also catalyzes the depolymerization of lignin and its model compounds under visible light irradiation, exhibiting good stability and reusability. This invention utilizes a one-pot method for photocatalyst preparation, which is simple and convenient to operate; the catalyst possesses excellent photocatalytic performance under visible light; it can efficiently degrade tetracycline hydrochloride under visible light; furthermore, it efficiently catalyzes the conversion of lignin to vanillin, while simultaneously efficiently converting lignin model compounds to aromatic phenolic compounds. This invention offers advantages such as convenient catalyst synthesis, low cost, good stability, high photocatalytic degradation efficiency, and high product selectivity.