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Dear Colleagues,

Nanomaterials are one of the significant topics regarding the rise of nanotechnology. Understanding nanomaterials is becoming increasingly crucial as it generates plausible new solutions to current problems or simply improves our lives. Due to the different chemical and physical properties at the nano-scale, nanomaterials can be applied to a myriad of research fields or industries, such as medicine, electronics, cosmetics, textiles, agriculture, and the environment. For example, the most common applications within the medical field are drug delivery, pharmaceutical design, and resolution imaging. Furthermore, using nanomaterials in textiles has improved the creation of products that will protect from ultraviolet rays, odor absorption, and water resistance or make the material lighter. Moreover, in the agricultural industry, the goal has primarily included the protection of the plant and soil, using improved pesticides or fertilizers. Thus, this Special Issue seeks the novel applications demonstrated in comprehensive articles on nanomaterials.

Dr. Wesley Wei-Wen Hsiao
Prof. Dr. Wei-Hung Chiang
Guest Editors

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nanomaterial
nanotechnology
novel applications

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16 pages, 4950 KiB

Open AccessArticle

High Selectivity Fuel from Efficient CO₂ Conversion by Zn-Modified rGO and Amine-Functionalized CuO as a Photocatalyst

by Retno Damastuti, Diah Susanti, Adhimoorthy Prasannan, Wesley Wei-Wen Hsiao and Po-Da Hong

Materials 2023, 16(12), 4314; https://doi.org/10.3390/ma16124314 - 11 Jun 2023

Cited by 3 | Viewed by 991

Abstract

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 CO₂ 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 CO₂ 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 CO₂ 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 CO₂ 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 CO₂ flow time increases the resulting quantity of the product. In conclusion, the rGO/CuO composite could have potential for large-scale CO₂ conversion and storage applications. Full article

(This article belongs to the Special Issue Novel Applications of Nanomaterials)

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