A nanocomposite photocatalyst of TiO₂ nanotubes/reduced graphene oxide (rGO-TNTAs) were prepared by γ-ray radiolysis. The rGO-TNTAs were studied for photocatalytic decomposition of ethylene (C₂H₄) in a refrigerated environment. Degradation efficiency of ethylene by these materials was described by the apparent first-order rate constant (K). The composite was characterized by Raman spectroscopy (RS), X-ray photoelectron spectroscopy (XPS), Atomic force microscopy (AFM) and Field emission electron microscopy (FESEM). The preparing parameters for materials affecting the degradation efficiency in terms of the rate constant were studied, including the GO addition and the irradiation dose. The results showed that (1) gamma irradiation can induce GO to partial rGO, the rGO surface of rGO-TNTAs was smooth and loosely lamellar structure. (2) The K of the rGO-TNTAs is highly dependent on the GO addition and the irradiation dose. With a GO addition of 0.1 g and an irradiation dose of 20 kGy, the maximum K value of rGO-TNTAs could be obtained under the experimental conditions. (3) From analysis of the Raman spectroscopy spectrum, optimum changes had occurred in the intensity ratio of D-band to G-band of the GO that had been γ-ray-irradiated with a dose of 20 kGy, resulting in the K of rGO-TNTAs increased by 40.9% compared with that of TNTAs.

通过γ射线分解制备了TiO ₂纳米管/氧化石墨烯（rGO-TNTAs）的纳米复合光催化剂。研究了rGO-TNTA在冷藏环境中对乙烯（C ₂ H ₄）的光催化分解。这些材料对乙烯的降解效率用表观一级速率常数（K）。通过拉曼光谱（RS），X射线光电子能谱（XPS），原子力显微镜（AFM）和场发射电子显微镜（FESEM）对复合材料进行了表征。研究了根据速率常数影响降解效率的材料制备参数，包括GO的添加量和辐照剂量。结果表明：（1）γ射线能诱导GO诱导部分rGO，rGO-TNTAs的rGO表面光滑，层状结构疏松。（2）rGO-TNTA的K高度依赖于GO的添加和照射剂量。GO添加量为0.1 g，辐照剂量为20 kGy时，最大K在实验条件下可获得rGO-TNTAs的值。（3）从所述拉曼分光光谱的分析，最佳的变化发生在d-带至GO的G带的强度比已被γ射线照射剂量20kGy进行的，从而导致ķ的rGO-TNTA比TNTA增长了40.9％。