Construction of hollow mesoporous silica nanoreactors for enhanced photo-oxidations over Au-Pt catalysts.
Hao TianJinhui ZhaoXinyao WangLizhuo WangHao LiuGuoxiu WangJun HuangJian LiuG Q Max LuPublished in: National science review (2020)
It is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction of micro/nanoreactors. Herein, we report the construction of hollow-structured submicrometer-photoreactors with bimetallic catalysts loaded within mesoporous silicas. The synthesis parameters are optimized to study the evolution of hollow structure through hydrothermal treatment and an 'adhesive-contraction' formation mechanism is proposed. AuPt@HMZS catalysts exhibited a broader absorbance region under visible light and the adsorption edge displayed a red-shift, indicating the strong metal-metal interactions at the alloy interface. The reaction performance of the coupled Au-Pt catalysts can be tuned to achieve excellent catalytic activity in cinnamyl alcohol oxidation to cinnamic acid for 3.1 mmol g-1 with 99% selectivity. The proposed strategy to build hollow structures as multifunctional micro/nanoreactors is promising for the design of high-performance and sustainable catalysts for chemical synthesis.
Keyphrases
- metal organic framework
- highly efficient
- visible light
- induced apoptosis
- molecularly imprinted
- drug delivery
- high resolution
- sensitive detection
- cancer therapy
- nitric oxide
- reduced graphene oxide
- oxidative stress
- signaling pathway
- risk assessment
- endoplasmic reticulum stress
- electron transfer
- mass spectrometry
- cell cycle arrest
- smooth muscle
- smoking cessation
- tandem mass spectrometry