Abstract Upcycling waste car bumper to value added carbon based nanomaterials has been achieved through facile catalytic pyrolysis. As synthesized TiO2 nanoparticles has been used for the first time as catalyst during pyrolysis process of the plastic waste. The quality and the performance of the produced carbon nanomaterials have been evaluated through different characterization techniques. The results show that, while rGO were produced from the thermal pyrolysis of waste car bumper in absence of TiO2 catalyst, rGO decorated with carbon dots have been produced in presence of TiO2 catalyst. Interestingly, simultaneous TiO2 rutile to anatase phase transformation and carbon nanomaterials formation has been occurred upon the catalytic transformation of the waste car bumper, however, an expected anatase to rutile transformation has been observed upon thermal treatment of TiO2 in the absence of the bumper. The photocatalytic performance of the created TiO2/CDs/rGO has been tested for the photocatalytic degradation of methylene blue. This paper provides a first attempt as an innovative approach to the upcycling waste into novel and high performance carbon nanomaterials for the application in photocatalysis. This innovative approach can be utilized to create various carbon nanocomposites utilizing metal oxides as catalyst and different plastic waste system as a carbon resource.

中文翻译：

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用于光催化应用的 TiO2/碳点装饰来自废汽车保险杠和 TiO2 纳米颗粒的还原氧化石墨烯复合材料

摘要 通过简单的催化热解，已实现将废汽车保险杠升级为增值碳基纳米材料。由于合成的 TiO2 纳米粒子首次被用作塑料废物热解过程中的催化剂。生产的碳纳米材料的质量和性能已经通过不同的表征技术进行了评估。结果表明，虽然 rGO 是在没有 TiO2 催化剂的情况下由废汽车保险杠的热裂解产生的，但在 TiO2 催化剂存在的情况下，已经产生了用碳点装饰的 rGO。有趣的是，在废汽车保险杠的催化转化过程中，同时发生了 TiO2 金红石到锐钛矿相变和碳纳米材料的形成，然而，在没有缓冲器的情况下对 TiO2 进行热处理时，观察到了预期的锐钛矿转变为金红石。所产生的 TiO2/CDs/rGO 的光催化性能已被测试用于亚甲蓝的光催化降解。本文首次尝试将废物升级为新型高性能碳纳米材料，以用于光催化应用。这种创新方法可用于利用金属氧化物作为催化剂和不同的塑料废物系统作为碳资源来制造各种碳纳米复合材料。本文首次尝试将废物升级为新型高性能碳纳米材料，以用于光催化应用。这种创新方法可用于利用金属氧化物作为催化剂和不同的塑料废物系统作为碳资源来制造各种碳纳米复合材料。本文首次尝试将废物升级为新型高性能碳纳米材料，以用于光催化应用。这种创新方法可用于利用金属氧化物作为催化剂和不同的塑料废物系统作为碳资源来制造各种碳纳米复合材料。