Abstract Carbon Quantum dots (CQDs) were obtained from Gingko biloba by using microwave technique, which is easy, time-saving, cost-effective, non-toxic and environmental friendly way. TiO2 were sensitized by green-prepared CQDs to obtain CQDs/TiO2 composite. The characterizations of the CQDs and CQDs/TiO2 were performed by Transmission Electron Microscopy (TEM), high-resolution TEM (HR-TEM), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopic (XPS), Photoluminescence (PL) and Fourier Transformed Infrared (FT-IR) spectroscopy. The photocatalytic hydrogen evolution activity of CQDs/TiO2 system was studied under visible light (λ > 420 nm) irradiation in the aqueous solution by using triethanolamine (TEOA) as a sacrificial electron donor. When Pt was used as a co-catalyst, CQDs/TiO2/Pt exhibited improved hydrogen evolution rate (1502 μmol h−1g−1) compared to CQDs/TiO2 composite (665 μmol h−1g−1).

中文翻译：

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使用银杏叶致敏二氧化钛制备碳量子点的绿色制备用于光氢生产

摘要 采用微波技术从银杏中提取碳量子点（CQDs），该方法简便、省时、经济、无毒、环保。TiO2 被绿色制备的 CQDs 敏化以获得 CQDs/TiO2 复合材料。通过透射电子显微镜 (TEM)、高分辨率 TEM (HR-TEM)、X 射线衍射 (XRD)、X 射线光电子能谱 (XPS)、光致发光 (PL) 对 CQDs 和 CQDs/TiO2 进行表征和傅里叶变换红外 (FT-IR) 光谱。通过使用三乙醇胺（TEOA）作为牺牲电子供体，在可见光（λ> 420 nm）照射下，在水溶液中研究了CQDs/TiO2体系的光催化析氢活性。当 Pt 用作助催化剂时，