Catalytic fabrication of graphene, carbon spheres, and carbon nanotubes from plastic waste

Salama, Eslam; Mohamed, Safaa; Samy, Mahmoud; Mensah, Kenneth; Ossman, Mona; Elkady, Marwa F.; Shokry Hassan, Hassan

doi:10.1039/d3ra07370j

Cited by 1 publication

(1 citation statement)

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“…Additionally, three peaks are obtained by fitting the O1s peaks, where the peaks at 530.39 eV, 531.58 eV, and 533 eV correspond to lattice oxygen, defective oxygen, and surface adsorbed oxygen in C10-ZnSn(OH) 6 , respectively ( Figure 5 c) [ 28 , 29 , 30 ]. In the spectrum of C 1s, the characteristic peaks at 284.80 eV, 286.59 eV, and 288.03 eV are from C-C, C-O-C, and O-C=O bonds, respectively ( Figure 5 d) [ 31 ]. The XPS results further demonstrate the presence of carbon in C10-ZnSn(OH) 6 .…”

Section: Resultsmentioning

confidence: 99%

Designing High Performance Carbon/ZnSn(OH)6-Based Humidity Sensors

Zhang,

Jia,

Wang

et al. 2024

Sensors

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In this work, pure phase and carbon/ZnSn(OH)6 samples were synthesized by a hydrothermal method. The composite sample’s structure, morphology, and functional groups were investigated by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. Subsequently, ZnSn(OH)6 samples were modified with different carbon contents, and their humidity-sensing properties were investigated. The introduction of carbon increased the specific surface area of pure ZnSn(OH)6 samples, thus significantly improving the sensors’ humidity sensing response. The C10-ZnSn(OH)6 sensor exhibited a high response, up to three orders of magnitude, a humidity hysteresisof 13.5%, a fast response time of 3.2 s, and a recovery time of 24.4 s. The humidity sensor’s possible humidity sensing mechanism was also analyzed using the AC complex impedance puissance method with a simulated equivalent circuit. These results revealed that ZnSn(OH)6 can effectively detect ambient humidity and that the introduction of carbon significantly improves its humidity-sensing performance. The study provides an effective strategy for understanding and designing ZnSn(OH)6-based humidity sensors.

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