研究目的
Investigating the plasmonic oxidation of glycerol using Au/TiO2 catalysts prepared by sol-immobilisation under base-free conditions.
研究成果
Glycerol oxidation can be accelerated with visible light illumination under base-free conditions using catalysts prepared by colloidal methods. This provides new avenues for catalyst design based on optimizing both the light absorption and catalyst properties and new modes of operation in catalysts that can be switched on/off with light illumination.
研究不足
The catalysts prepared without a stabiliser were inactive due to larger particle sizes, suggesting that smaller nanoparticles are required for this reaction. The presence of the stabiliser may influence the catalyst activity, and calcination to remove the stabiliser increases the mean nanoparticle size, reducing conversion.
1：Experimental Design and Method Selection:
Au/TiO2 catalysts were prepared by a sol-immobilisation method with and without polyvinyl alcohol (PVA) as a stabilising polymer. The catalysts were characterized by UV–vis spectroscopy and transmission electron microscopy.
2：Sample Selection and Data Sources:
Aqueous glycerol was used as the reactant.
3：List of Experimental Equipment and Materials:
HAuCl4·3H2O, PVA, NaBH4, TiO2 (P25 Aeroxide?, Evonik), H2SO4, stainless steel custom designed autoclave reactor, 300 W lamp (USHIO), water filter, cut-off filter (Newport Stablife? Technology), Agilent 1260 Infinity HPLC with a Metacarb 67H column.
4：Experimental Procedures and Operational Workflow:
Plasmonic photocatalytic glycerol oxidation at pH 7 was carried out under dark and illuminated conditions. The reactor was sealed, flushed with O2, and pressurized. The temperature was set to 90°C. After reaction, the reactor was quenched, and the slurry was filtered and analyzed by HPLC.
5：Data Analysis Methods:
Product analysis was carried out using HPLC.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Agilent 1260 Infinity HPLC
with a Metacarb 67H column
Agilent
Used for product analysis.
-
HAuCl4·3H2O
Sigma Aldrich
Used as a precursor for the synthesis of Au nanoparticles.
-
PVA
average molecular weight MW = 9000–10,000 g/mol, 80% hydrolysed
Used as a stabilising polymer in the preparation of Au/TiO2 catalysts.
-
NaBH4
Aldrich
Used as a reducing agent in the synthesis of Au nanoparticles.
-
TiO2
P25 Aeroxide?
Evonik
Used as a support for the Au nanoparticles.
-
H2SO4
Used in the immobilisation of the Au colloid on TiO2.
-
stainless steel custom designed autoclave reactor
DG Innovation
Used for the plasmonic oxidation of glycerol.
-
300 W lamp
USHIO
Used as a light source for the plasmonic oxidation of glycerol.
-
water filter
Used to remove IR radiation from the output light.
-
cut-off filter
Newport Stablife? Technology
Used to eliminate wavelengths below 420 nm.
-
登录查看剩余8件设备及参数对照表
查看全部
