本研究旨在開發具高效能之光驅動過氧化氫（H2O2）生成材料系統。三氧化鎢（WO3）具備良好的可見光響應，為常見的光催化材料，但單一 WO3 受限於快速電子-電洞複合與導帶位置限制。因此，本研究以酸輔助水熱法引入聚乙烯吡咯烷酮（PVP），進行界面與結構調控。實驗中，WO3 之棒狀前驅體與 PVP 於鹽酸環境下進行二次水熱處理，使其重構轉化為兼具無定形碳質微球與殘留鎢物種的 HCl-PVP-WO3-N2H4(380℃) 有機/無機混成結構。光催化測試結果顯示，HCl-PVP-WO3-N2H4(380℃) 在光照下之 H2O2 生成量較原始前驅體顯著提升，於純水中可達 1.44 mM，於乙醇/水溶液中可達 1.8 mM。TEM、XPS、FTIR 與 UV-vis 分析結果顯示，酸性水熱處理可促使 PVP 轉化為含 C-N 等官能基之無定形碳質微球，並與殘留 WO3 相關物種共同影響材料的光吸收與界面反應行為。
此外，在實際光源應用的模擬四季太陽光測試中，HCl-PVP-WO3-N2H4(380℃) 有機/無機混成結構展現良好的太陽光響應能力，其 H2O2 轉換率在四季條件下可達約280-350%，且經過 30 次反覆光照循環後仍維持良好的產能穩定性。亞甲基藍（MB）降解與 MTT 細胞存活率測試亦初步顯示，此材料具有光誘導氧化反應與生物相關應用之潛力。綜合而言，本研究建立了一種酸輔助水熱製備之 PVP 衍生碳質混成材料系統，不僅有效提升光驅動 H2O2 生成效率與太陽光利用能力，也為高分子衍生碳質材料應用於光催化 H2O2 生成提供新的設計方向。

This study aims to develop an efficient material system for light-driven hydrogen peroxide (H2O2) generation. Tungsten trioxide (WO3) is a common photocatalytic material with visible-light response, but its performance is limited by rapid electron-hole recombination and its conduction-band position. Therefore, polyvinylpyrrolidone (PVP) was introduced through an acid-assisted hydrothermal process to regulate the structural and interfacial properties of WO3. A WO3 rod-like precursor and PVP were treated in hydrochloric acid, leading to the formation of an HCl-PVP-WO3-N2H4 (380 °C) organic/inorganic hybrid structure composed of amorphous carbonaceous microspheres and residual tungsten species.
Photocatalytic results showed that HCl-PVP-WO3-N2H4 (380 °C) exhibited enhanced H2O2 generation compared with the original precursor, reaching 1.44 mM in pure water and 1.8 mM in an ethanol/water solution. TEM, XPS, FTIR, and UV-vis analyses revealed that acidic hydrothermal treatment promoted the transformation of PVP into amorphous carbonaceous microspheres containing C-N-related functional groups, which may influence light absorption and interfacial reaction behavior. In simulated seasonal sunlight tests, the hybrid material showed good solar-light responsiveness, with H2O2 conversion rates of approximately 280-350% and maintained good stability after 30 repeated irradiation cycles. MB degradation and MTT assays further indicated its potential for photoinduced oxidation and bio-related applications. Overall, this study provides an acid-assisted hydrothermal strategy for preparing PVP-derived carbonaceous hybrid materials for efficient photocatalytic H2O2 generation.

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