Photodeposited Pt on SiO2@TiO2 Aerogels Enhances Photocatalytic CO2 Reduction Performance

Photocatalytic CO 2 reduction technology is a promising new way to convert CO 2 into high value-added chemicals and fuels by sunlight. However, there are still some problems in the practical application of this technology, such as low yield, poor catalyst stability and excessive by-products. To solve these problems, TS-HF- x Pt series photocatalysts were successfully prepared by sol-gel method, HF etching process and photodeposition technology. The TS-HF-0.7Pt catalyst showed more excellent catalytic performance, and the methane yield reached 86.084 μmol·g -1 ·h -1 , which was 32.2 times that of TS-HF. The performance test shows that the surface plasmon resonance (SPR) effect of Pt significantly broadens the light absorption range, inhibits the recombination of photogenerated electron-hole pairs, reduces the charge transfer resistance, and improves the carrier utilization efficiency, thereby promoting the absorption of CO 2 . This reveals the great potential of Pt loading in improving the catalytic performance of TS-HF.