Composite photocatalyst and preparation method thereof
A catalyst and composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as cost constraints, high scarcity, etc. , the effect of improving structural stability and high photocatalytic performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0036] The present invention also provides a method for preparing the composite photocatalyst described in the above technical solution, comprising the following steps:
[0037] Ethanol solution of cobalt acetate tetrahydrate and TiO 2 (B) the ethanol dispersion liquid is mixed, obtains raw material liquid;
[0038] Mixing the raw material liquid and aqueous ammonia to obtain an aqueous ammonia mixture;
[0039] The ammonia-water mixture is heated in a hydrothermal reactor to obtain a composite photocatalyst.
[0040] In the present invention, the ethanol solution of cobalt acetate tetrahydrate and TiO 2 The ethanol dispersions of (B) were mixed to obtain a raw material solution. In the present invention, the concentration of the ethanol solution of cobalt acetate tetrahydrate is preferably 0.05-2.5 g / L, more preferably 0.1-2 g / L, most preferably 0.5-1 g / L; the TiO 2 The concentration of the ethanol dispersion (B) is preferably 0.1 to 2 g / L, more preferably 0.5 to 1.5 g / L,...
Embodiment 1
[0063] At room temperature, 5 mL of isopropyl titanate (purity 95%) was added dropwise to 3 mL of hydrochloric acid (37 wt %), stirred for 15 min to obtain solution A; then 1 mL of polyoxyethylene-polyoxypropylene-polyoxyethylene Add ethylene (P123) dropwise to 10mL ethanol, stir for 15min to obtain solution B; then add solution B dropwise to solution A, and then stir for 30min to obtain solution C; then add 90mL ethylene glycol to solution C, and stir for 5min , to obtain solution D; put the obtained solution D into a polytetrafluoroethylene reaction kettle at 150°C and heat for 20 hours; after the reaction kettle was naturally cooled to room temperature, the sample was taken out, centrifuged and washed 4 times with alcohol, dried, and ground. That is to get pure TiO 2 (B) Powder photocatalyst.
[0064] In this example, the obtained photocatalyst is used for photocatalytic hydrogen production: 20 mg of prepared TiO 2 (B) Powdered photocatalyst and 80 mL of 20% methanol solu...
Embodiment 2
[0066] Take by weighing the TiO that 0.001g embodiment 1 obtains 2 (B) The powder was ultrasonically dissolved with 100 mL of ethanol solvent to obtain solution E2. Weigh 0.001 g of cobalt acetate tetrahydrate and dissolve it ultrasonically with 10 mL of ethanol solvent to obtain solution F2. Then solution F2 was added dropwise to solution E2, and stirred for 15 min to obtain solution G2. Then add 2 mL of ammonia water to the solution G2, continue to stir for 15 minutes to obtain the solution H2, put the obtained solution H2 into a polytetrafluoroethylene reactor at 150°C for 3 hours, and heat the reaction for 3 hours; after the reactor is naturally cooled to room temperature, take out the sample, Centrifuge and wash with alcohol for 4 times, dry and grind to obtain a composite photocatalyst labeled Co1. The molar ratio of Co and Ti is 7.4:100.
[0067]In this embodiment, the photocatalyst obtained is used for photocatalytic hydrogen production: 20 mg of the prepared compos...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| concentration | aaaaa | aaaaa |
| concentration | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More