Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures
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 NiSO<sub>4</sub> catalyst under...
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MDPI AG
2022-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/3/314 |
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| author | Ayi Bahtiar Mila Sri Hardiati Ferry Faizal Vanitha Muthukannan Camellia Panatarani I Made Joni |
| author_facet | Ayi Bahtiar Mila Sri Hardiati Ferry Faizal Vanitha Muthukannan Camellia Panatarani I Made Joni |
| author_sort | Ayi Bahtiar |
| collection | DOAJ |
| description | 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 NiSO<sub>4</sub> catalyst under microwave irradiation at various reaction times of 5, 10, 20, and 30 min. The GO reduction was conducted at a fixed Ar/H<sub>2</sub> 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/H<sub>2</sub> (4:1) mixture for GO reduction, where Ar and H<sub>2</sub> 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, NiS<sub>2</sub>, Ni<sub>3</sub>S<sub>2</sub>, and Ni<sub>3</sub>S<sub>4</sub> due to decomposition of NiSO<sub>4</sub>. 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. |
| first_indexed | 2024-03-09T23:25:20Z |
| format | Article |
| id | doaj.art-5e798eaf75894178a857c3633bf8fc77 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T23:25:20Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-5e798eaf75894178a857c3633bf8fc772023-11-23T17:18:43ZengMDPI AGNanomaterials2079-49912022-01-0112331410.3390/nano12030314Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike StructuresAyi Bahtiar0Mila Sri Hardiati1Ferry Faizal2Vanitha Muthukannan3Camellia Panatarani4I Made Joni5Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang 45363, West Java, IndonesiaDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang 45363, West Java, IndonesiaDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang 45363, West Java, IndonesiaFunctional Nano Powder University Center of Excellence (FiNder U CoE), Universitas Padjadjaran, Jalan Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang 45363, West Java, IndonesiaDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang 45363, West Java, IndonesiaDepartment of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang 45363, West Java, IndonesiaRecently, 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 NiSO<sub>4</sub> catalyst under microwave irradiation at various reaction times of 5, 10, 20, and 30 min. The GO reduction was conducted at a fixed Ar/H<sub>2</sub> 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/H<sub>2</sub> (4:1) mixture for GO reduction, where Ar and H<sub>2</sub> 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, NiS<sub>2</sub>, Ni<sub>3</sub>S<sub>2</sub>, and Ni<sub>3</sub>S<sub>4</sub> due to decomposition of NiSO<sub>4</sub>. 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.https://www.mdpi.com/2079-4991/12/3/314reduced graphene oxideNi-reduced graphene oxidegrapheneoxidationmicrowavesuperhydrophobic |
| spellingShingle | Ayi Bahtiar Mila Sri Hardiati Ferry Faizal Vanitha Muthukannan Camellia Panatarani I Made Joni Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures Nanomaterials reduced graphene oxide Ni-reduced graphene oxide graphene oxidation microwave superhydrophobic |
| title | Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures |
| title_full | Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures |
| title_fullStr | Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures |
| title_full_unstemmed | Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures |
| title_short | Superhydrophobic Ni-Reduced Graphene Oxide Hybrid Coatings with Quasi-Periodic Spike Structures |
| title_sort | superhydrophobic ni reduced graphene oxide hybrid coatings with quasi periodic spike structures |
| topic | reduced graphene oxide Ni-reduced graphene oxide graphene oxidation microwave superhydrophobic |
| url | https://www.mdpi.com/2079-4991/12/3/314 |
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