Synthesis of rGO-Ni by microwave irradiation method

Joni, I Made; Hardiati, Mila Sri; Faizal, Ferry; Panatarani, Camellia

doi:10.1063/5.0003077

Cited by 2 publications

(2 citation statements)

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“…The GO reduction process was carried out using the microwave irradiation method, with equipment arranged as shown in Figure 1 , referring to the best-optimized reduction process from our previous study [ 21 ]. The sample with a mass of 0.5 g was added into the separate glass, which was tightly closed and kept in the microwave oven.…”

Section: Methodsmentioning

confidence: 99%

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Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures

et al. 2022

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Recently, sophisticated technologies are applied to design a certain surface nature that can have superhydrophobic properties. Thus, a simple spray technique was introduced to prepare a superhydrophobic surface using rGO with Ni-S system (rGO-Ni) by using NiSO4 catalyst under microwave irradiation at various reaction times of 5, 10, 20, and 30 min. The GO reduction was conducted at a fixed Ar/H2 ratio, a flow rate of 0.4 L/min, microwave power of 720 W, and a mass of 0.5 g. GO powder with nickel sulfate catalyst was treated under Ar/H2 (4:1) mixture for GO reduction, where Ar and H2 were expected to prevent the rebinding of oxygen released from GO. The result of XRD and Raman measurement confirms that rGO-Ni prepared at reaction time 20 min exhibit the highest reduction of GO and the presence of various Ni-S crystal structures such as NiS, NiS2, Ni3S2, and Ni3S4 due to decomposition of NiSO4. The rGO-Ni coating performance shows superhydrophobic nature with a contact angle of 150.1°. The AFM images show that the addition of nickel to rGO produces a quasi-periodic spike structure, which increases the superhydrophobicity of the r-GO-Ni coated glass with a contact angle of 152.6°. It is emphasized that the proposed simple spray coating using rGO-Ni provides a more favorable option for industry application in obtaining superhydrophobic surfaces.

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Section: Methodsmentioning

confidence: 99%

“…The power of the microwave is 800 W, and rGO with a conductivity of 200 S/m is produced in a few minutes. Recently, we have successfully synthesized rGO by microwave-assisted methods within the Ar/H 2 gas flow rate of 0.4 L/min and microwave power of 720 Watt provide optimum oxygen group reduction [ 21 ].…”

Section: Introductionmentioning

confidence: 99%