The degradation of organic dye molecules through the photocatalysis process has been explored widely by researchers. There have been many attempts to create photocatalyst material that meets the qualities required, one of which is the synthesis of TiO₂ nanocomposite. In this study, modifications on TiO₂ were made to enhance its photocatalytic activity, namely by exposing the (001) crystal facet of TiO₂ and integrating graphene oxide in the catalyst to form TiO₂/GO nanocomposite. From the characterizations carried out in this study, TiO₂/GO nanocomposite with exposed (001) crystal facet has been successfully synthesized. The exposure percentage of the (001) facet is observed at the value of 13.47% and 15.54% for two TiO₂/GO samples with a different titania precursor source. Furthermore, the photocatalytic performance test shows that this percentage of exposure, along with graphene oxide in the nanocomposite, does affect the photodegradation percentage of methylene blue. The photocatalyst samples worked well under irradiation of visible light, which has successfully degraded methylene blue solution by up to 51.30% for the reaction of 1 h. This improvement in the photodegradation process is presumed to result from the exposed (001) facet that provides more reactivity to generate radical species and the graphene oxide that assists charge separation well.

研究人员广泛探索了通过光催化过程降解有机染料分子。已经有许多尝试来创造满足所需质量的光催化剂材料，其中之一是合成 TiO ₂纳米复合材料。在这项研究中，对TiO ₂进行改性以提高其光催化活性，即通过暴露TiO ₂的（001）晶面并将氧化石墨烯整合到催化剂中形成TiO ₂ /GO纳米复合材料。从本研究中进行的表征来看，TiO ₂已经成功合成了具有暴露（001）晶面的 /GO 纳米复合材料。对于两种 TiO ₂，(001) 面的暴露百分比分别为 13.47% 和 15.54%/GO 样品具有不同的二氧化钛前体来源。此外，光催化性能测试表明，这种暴露百分比以及纳米复合材料中的氧化石墨烯确实会影响亚甲蓝的光降解百分比。光催化剂样品在可见光照射下工作良好，在反应 1 小时内成功降解亚甲蓝溶液达 51.30%。据推测，光降解过程中的这种改进是由于暴露的 (001) 面提供了更多的反应性以产生自由基物种和氧化石墨烯，从而很好地帮助电荷分离。