CdTe量子点在可见光下具有优异的光催化制氢活性，将CdTe量子点修饰到石墨相氮化碳（g-C₃N₄）表面可以进一步提高其产氢活性。采用一步水热法合成了CdTe QDs/g-C₃N₄复合光催化剂，并用XRD、TEM、DRS、FT-IR和PL对其进行分析。在以CoCl₂为助催化剂和抗坏血酸（H₂A）为牺牲剂的条件下，得到的复合光催化剂在可见光照射下比纯CdTe QDs和g-C₃N₄表现出更高的产氢活性。其中质量分数为20% CdTe QDs/g-C₃N₄的复合材料的H₂生成量为4.8 mmol，是纯CdTe QDs的2.4倍。

CdTe quantum dots (QDs) exhibits high photocatalytic hydrogen production under visible light irradiation.By decorating CdTe QDs onto the surface of graphitic carbon nitride (g-C₃N₄),its activity in generating hydrogen can be further improved.In this work,CdTe QDs/g-C₃N₄ composite photocatalysts are fabricated by one-step hydrothermal method and characterized by XRD,TEM,DRS,FT-IR and PL.In the case of employing CoCl₂ and ascorbic acid (H₂A) as co-catalyst and sacrificial agent,respectively,the obtained composite photocatalysts reveal higher activity in hydrogen production under visible light irradiation than pure CdTe QDs or pure g-C₃N₄.The optimal composite with 20wt% of CdTe QDs can help to produce 4.8 mmol of hydrogen,which is 2.4 times that over pure CdTe QDs.

曾丹丹(1993-),女,硕士研究生,研究方向为光催化纳米材料,1197375361@qq.com