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采用紫外可见吸收光谱法、荧光光谱法和光电化学法研究了卟啉/氧化石墨烯复合物与抗坏血酸之间的相互作用。研究发现:抗坏血酸存在下,卟啉/氧化石墨烯体系的吸光特性和强度均发生变化,同时加速激发态光电子从卟啉转移到氧化石墨烯的失活过程。光电化学测试进一步表明抗坏血酸参与了卟啉/氧化石墨烯体系的电子转移过程,增大了体系的光电流和光电压。提出了抗坏血酸参与卟啉/氧化石墨烯复合物体系光电子转移可能的模型。
The interaction between porphyrin / graphene oxide and ascorbic acid was studied by UV-visible absorption spectroscopy, fluorescence spectroscopy and photoelectrochemical methods. It was found that the absorption and intensity of porphyrin / graphene oxide system both changed in the presence of ascorbic acid, and the deactivation of excited photoelectrons from porphyrin to graphene oxide was accelerated. Photoelectrochemical tests further indicate that ascorbate participates in the electron transfer process of the porphyrin / graphene oxide system, increasing the photocurrent and photovoltage of the system. The possible model of ascorbate involved in the photoelectron transfer of porphyrin / graphene oxide composites was proposed.