Damastuti Retno, Susanti Diah, Prasannan Adhimoorthy, Hsiao Wesley Wei-Wen, Hong Po-Da
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106335, Taiwan.
Department of Materials and Metallurgical Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya 60111, Indonesia.
Materials (Basel). 2023 Jun 11;16(12):4314. doi: 10.3390/ma16124314.
Reduced graphene oxide (rGO) has been used in copper (II) oxide (CuO)-based photocatalysts as an additive material. An application of this CuO-based photocatalyst is in the CO reduction process. The preparation of rGO by a Zn-modified Hummers' method has resulted in a high quality of rGO in terms of excellent crystallinity and morphology. However, implementing Zn-modified rGO in CuO-based photocatalysts for the CO reduction process has yet to be studied. Therefore, this study explores the potential of combining Zn-modified rGO with CuO photocatalysts and performing these rGO/CuO composite photocatalysts to convert CO into valuable chemical products. The rGO was synthesized by using a Zn-modified Hummers' method and covalently grafted with CuO by amine functionalization with three different compositions (1:10, 1:20, and 1:30) of rGO/CuO photocatalyst. XRD, FTIR, and SEM were used to investigate the crystallinity, chemical bonds, and morphology of the prepared rGO and rGO/CuO composites. The performance of rGO/CuO photocatalysts for the CO reduction process was quantitively measured by GC-MS. We found that the rGO showed successful reduction using a Zn reducing agent. The rGO sheet could be grafted with CuO particles and resulted in a good morphology of rGO/CuO, as shown from the XRD, FTIR, and SEM results. The rGO/CuO material showed photocatalytic performance due to the advantages of synergistic components and resulted in methanol, ethanolamine, and aldehyde as fuel with amounts of 37.12, 8730, and 17.1 mmol/g catalyst, respectively. Meanwhile, adding CO flow time increases the resulting quantity of the product. In conclusion, the rGO/CuO composite could have potential for large-scale CO conversion and storage applications.
还原氧化石墨烯（rGO）已被用作基于氧化铜（CuO）的光催化剂中的添加剂材料。这种基于CuO的光催化剂的一个应用是在CO还原过程中。通过锌改性的Hummers法制备rGO，在结晶度和形态方面产生了高质量的rGO。然而，在用于CO还原过程的基于CuO的光催化剂中实施锌改性的rGO尚未得到研究。因此，本研究探索了将锌改性的rGO与CuO光催化剂结合的潜力，并对这些rGO/CuO复合光催化剂进行性能测试，以将CO转化为有价值的化学产品。通过锌改性的Hummers法合成rGO，并通过胺官能化将其与具有三种不同组成（1:10、1:20和1:30）的rGO/CuO光催化剂共价接枝到CuO上。使用XRD、FTIR和SEM来研究制备的rGO和rGO/CuO复合材料的结晶度、化学键和形态。通过GC-MS定量测量rGO/CuO光催化剂在CO还原过程中的性能。我们发现使用锌还原剂成功还原了rGO。如XRD、FTIR和SEM结果所示，rGO片可以与CuO颗粒接枝，从而得到良好的rGO/CuO形态。由于协同组分的优势，rGO/CuO材料表现出光催化性能，并分别产生了甲醇、乙醇胺和醛作为燃料，产量分别为37.12、8730和17.1 mmol/g催化剂。同时，增加CO流动时间会增加产物的产量。总之，rGO/CuO复合材料在大规模CO转化和存储应用中可能具有潜力。
