It is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction ofmicro/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.