Metal-organic frameworks （MOFs） are self-assembled molecular containers that can encapsulate and stabilize short-lived reaction intermediates. In this study, the Cu-benzene-l,3,5-tricarboxylate （BTC） MOF was incor...Metal-organic frameworks （MOFs） are self-assembled molecular containers that can encapsulate and stabilize short-lived reaction intermediates. In this study, the Cu-benzene-l,3,5-tricarboxylate （BTC） MOF was incorporated in a ZnO/graphene oxide （GO） photocatalytic system by electrostatic interaction, and the obtained assembly showed improved hydrogen evolution activity. Electron spin resonance analysis was used to detect and monitor free radicals in the photocatalytic system, and demonstrated that Cu-BTC MOF could stabilize and extend the lifetime of free radicals, increasing the chance of H. radical recombination to form H2. This work provides a new strategy for designing highly efficient photocatalysts.展开更多
1 Methods and principles Based on the variation of free radicals, thermal evolution of organic matter in source rocks in sedimentary basin can be identified by using electron paramagnetic resonance (EPR) technique. Th...1 Methods and principles Based on the variation of free radicals, thermal evolution of organic matter in source rocks in sedimentary basin can be identified by using electron paramagnetic resonance (EPR) technique. This is based on the changes of free radicals with the evolution of kerogen, which may lead to the changes of EPR spectra. The number of free radicals展开更多
文摘Metal-organic frameworks （MOFs） are self-assembled molecular containers that can encapsulate and stabilize short-lived reaction intermediates. In this study, the Cu-benzene-l,3,5-tricarboxylate （BTC） MOF was incorporated in a ZnO/graphene oxide （GO） photocatalytic system by electrostatic interaction, and the obtained assembly showed improved hydrogen evolution activity. Electron spin resonance analysis was used to detect and monitor free radicals in the photocatalytic system, and demonstrated that Cu-BTC MOF could stabilize and extend the lifetime of free radicals, increasing the chance of H. radical recombination to form H2. This work provides a new strategy for designing highly efficient photocatalysts.
文摘1 Methods and principles Based on the variation of free radicals, thermal evolution of organic matter in source rocks in sedimentary basin can be identified by using electron paramagnetic resonance (EPR) technique. This is based on the changes of free radicals with the evolution of kerogen, which may lead to the changes of EPR spectra. The number of free radicals
