为改善能源短缺，对新型光催化水解制氢材料进行了研究。通过改进Hummer法制备氧化石墨，溶胶-凝胶法制备锐钛矿型二氧化钛，采用浓碱法制得石墨烯-二氧化钛纳米管催化剂，考察了不同石墨烯的掺杂量对催化活性的影响。经过光解水制氢实验发现，掺杂不同质量分数石墨烯的催化剂催化活性得到了进一步提高，其中掺杂量为1%的产氢活性最好，产氢速率是纯二氧化钛纳米管的2.5倍。通过BET、XRD、UV以及FT-IR等方法对催化剂进行了表征。结果表明，石墨烯与二氧化钛纳米管成功复合，并且石墨烯的掺杂在一定程度上提高了催化剂的BET比表面积；催化剂对可见光的响应范围得到进一步扩大，这为催化剂光解水制氢性能的提高提供了有力的条件。

In response to energy shortage,a new type of photocatalytic material is developed for hydrogen production from water.Graphite oxide is prepared via modified Hummer method,anatase titanium dioxide is prepared via sol-gel method,and graphene-titanium dioxide (RGO-TiO₂) nanotube catalyst is prepared via concentrated alkali method from graphite oxide and anatase titanium dioxide.Influence of the doping amount of graphene on the catalytic activity of the catalyst is investigated.It is found through evaluation in photocatalytic hydrogen production experiment that the catalytic activity of the catalyst after doping with different mass fractions of graphene is further improved.The catalyst doped with 1% of graphene has the best activity in hydrogen production,over which the hydrogen production rate is 2.5 times that over pure titanium dioxide nanotubes.The catalysts are characterized by means of BET,XRD,ultraviolet-diffuse reflectance and FT-IR.The results indicate that graphene has successfully been compounded with titanium dioxide nanotubes,and the doping of graphene improves the BET specific surface area of the catalyst to some extent.The response range of the catalyst against visible light is further expanded,which provides powerful conditions to improve catalysts' performance in photocatalytic production of hydrogen from water.

耿悠然(1995-),女,硕士研究生,研究方向为光催化水解制氢,1143913066@qq.com