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Visible Light CO2 Reduction to CH4 Using Hierarchical Yolk@shell TiO2-xHx Modified with Plasmonic Au-Pd Nanoparticles
摘要： Engineering of advanced semiconductor photocatalysts for CO2 conversion to solar fuels is a promising strategy to solve the greenhouse effect and energy crisis. Herein, hierarchical urchin-like yolk@shell TiO2-xHx decorated with core/shell Au-Pd plasmonic nanoparticles (HUY@S-TOH/AuPd) have been prepared using a multi-step process and employed as advanced visible light active photocatalyst in CO2 conversion to CH4 with rate of 47 μmol/gcat.h (up to 126 μmol/gcat after 7h). Different engineered sites in this structure for high gas adsorption, powerful visible light activation and intense electron transportation are responsible for the observed high photocatalytic CO2 conversion efficiency. The present smart designing process can produce a considerable cooperation, not only to disclose the architectural engineering to improvement of photo-conversion efficiency, but also as a viable and appropriate photocatalytic process to sustainable energy production.
关键词： nanoarchitecture,Plasmonic nanoparticles,Photocatalysis,CO2 Conversion,Oxygen vacancy
更新于2025-09-23 15:19:57
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Optically controlled hybrid metamaterial of plasmonic spiky gold inbuilt graphene sheets for bimodal imaging guided multimodal therapy
摘要： The development of multifunctional molecular diagnostic platforms for concordant visualization and treatment of diseases with high sensitivity and resolution has recently become a crucial strategy in cancer management. Thus, engineering functional metamaterials with high therapeutic and imaging capabilities to elucidate diseases from morphological behaviors to physiological mechanisms is an unmet need in the current scenario. Here, we report the design of a unique hybrid plasmonic nanoarchitecture, for targeted multiple photo-therapies of breast cancer by simultaneous real time monitoring through fluorescence and surface enhanced Raman scattering (SERS) techniques. The nanoframework consists of plasmonic gold-graphene hybrids tethered with folic acid ligated chitosan modified photosensitizer (PpIX) to afford target specific localized photothermal and photodynamic therapy. The hybrid vehicle also served as an excellent nanocarrier for efficient loading and stimuli responsive release of the chemotherapeutic drug doxorubicin (DOX) to enhance the therapeutic efficacy, thereby forming a trimodal nanomedicine against cancer. The cytotoxic effects induced by the cumulative action of triplet therapeutic tools were visualized through both fluorescence and SERS imaging channels. Moreover, it also generated synchronized therapeutic effects resulting in the effective regression of tumor volume without propagating any toxic effect to other organs of the animals. Taken together, by virtue of strong light-matter interactions, our nanoprobe showed enhanced photoadsorption which facilitate the amplified light reactive therapeutic and imaging efficacies along with targeted and enhanced chemotherapy, both in vitro and in vivo, which may offer a promising outcome in clinical research.
关键词： surface enhanced Raman scattering (SERS),hybrid plasmonic nanoarchitecture,breast cancer,trimodal nanomedicine,fluorescence,doxorubicin (DOX),photothermal and photodynamic therapy,multifunctional molecular diagnostic platforms
更新于2025-09-23 15:19:57