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• W4304633350 startingPage "20220037" @default.
• W4304633350 abstract "<p indent=0mm>The effective utilization of solar energy for hydrogen production requires an abundant supply of thermodynamically active photo-electrons; however, the photocatalysts are generally impeded by insufficient light absorption and fast photocarrier recombination. Here, we report a multiple-regulated strategy to capture photons and boost photocarrier dynamics by developing a broadband photocatalyst composed of defect engineered g-C₃N₄ (DCN) and upconversion NaYF₄:Yb³⁺,Tm³⁺ (NYF) nanocrystals. Through a precise defect engineering, the S dopants and C vacancies jointly render DCN with defect states to effectively extend the visible light absorption to <sc>590 nm</sc> and boost photocarrier separation via a moderate electron-trapping ability, thus facilitating the subsequent re-absorption and utilization of upconverted photons/electrons. Importantly, we found a promoted interfacial charge polarization between DCN and NYF has also been achieved mainly due to Y-N interaction, which further favors the upconverted excited energy transfer from NYF onto DCN as verified both theoretically and experimentally. With a 3D architecture, the NYF@DCN catalyst exhibits a superior solar H₂ evolution rate among the reported upconversion-based system, which is 19.3 and 1.5 fold higher than bulk material and DCN, respectively. This work provides an innovative strategy to boost solar utilization by using defect engineering and building up interaction between hetero-materials." @default.
• W4304633350 created "2022-10-12" @default.
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• W4304633350 date "2022-12-22" @default.
• W4304633350 modified "2023-10-14" @default.
• W4304633350 title "Defect and interface control on graphitic carbon nitrides/upconversion nanocrystals for enhanced solar hydrogen production" @default.
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• W4304633350 doi "https://doi.org/10.1360/nso/20220037" @default.
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