Nanoarchitectonics with reduced graphene oxide nanosheets for photo- and humidity sensing properties

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2024-09-02 DOI:10.1016/j.diamond.2024.111563

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Abstract

The present study explores the photo- and humidity sensing properties of reduced graphene oxide (rGO) sheets at room temperature. Graphite powder was chemically oxidized using a modified Hummer's approach to produce rGO sheets. The physicochemical traits of the rGO sensor were analyzed by various characterization techniques, including X-ray diffraction (XRD), UV–vis absorption spectra, Raman spectroscopy, field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HR-TEM). Raman spectroscopic micrograph exhibits two vibrational modes: D-band at 1329 and G-band at 1587 cm⁻¹. The rGO photosensor shows a maximum responsivity of about 7.22 AW⁻¹ with quick response and recovery times. The sensor showed a maximum sensitivity of 37 % in humid environments, with response and recovery durations of 44 s and 126 s, respectively. The rGO-based sensor showed excellent photosensitivity, exceptional stability, and a better response to photo and humid environments. The excellent performance of rGO sheets proves to be a promising functional material in sensing devices.

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利用还原氧化石墨烯纳米片的纳米结构实现光和湿度传感特性

本研究探讨了还原氧化石墨烯（rGO）薄片在室温下的光传感和湿度传感特性。采用改进的 Hummer 方法对石墨粉进行化学氧化，从而制备出 rGO 片材。通过各种表征技术，包括 X 射线衍射 (XRD)、紫外-可见吸收光谱、拉曼光谱、场发射扫描电子显微镜 (FESEM) 和高分辨率透射电子显微镜 (HR-TEM)，分析了 rGO 传感器的物理化学特性。拉曼光谱显微照片显示了两种振动模式：D 波段在 1329 cm-1 处，G 波段在 1587 cm-1 处。rGO 光传感器的最大响应率约为 7.22 AW-1，响应和恢复时间都很快。传感器在潮湿环境中的最大灵敏度为 37%，响应和恢复时间分别为 44 秒和 126 秒。基于 rGO 的传感器具有出色的光敏性、超强的稳定性以及对光照和潮湿环境更好的响应能力。rGO 片材的优异性能证明它是一种很有前途的传感设备功能材料。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.

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