Synthesis of hierarchical superhydrophobic zinc oxide nano-structures for oil/water separation
Source abstract
Abstract
Abstract Superhydrophobic hierarchical ZnO nano-structures were prepared by a convenient, inexpensive and reproducible method using no low surface energy additives or modifiers. Chemical composition and morphological properties of samples were characterized by SEM, TEM, XRD, and Raman analyses. The SEM images of resulted ZnO particles exhibited a hierarchical flower-like micro-nano dual-scale structure composed of nano-needles. The average tip diameter and length of the needles were approximately 90 nm and 1.5 µm, respectively. The prepared hierarchical sample displayed considerably high water contact angle (WCA = 163.8 ± 1.5°) and low contact angle hysteresis (CAH = 1.2°), indicating excellent superhydrophobic properties. The surface wettability was reversibly switched between super hydrophilicity and superhydrophobicity by altering the annealing temperature. A packed layer of the superhydrophobic product was applied for oil/water separation exhibiting high separation efficiency (>95%) and a high flux (2540 Lm−2 h−1). The variations of WCA and CAH values versus water immersion time were evaluated to examine the durability of the particles. Results confirmed that the obtained samples have an extremely high robustness after 12 h dipping in water.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Modification and Superhydrophobicity · Icing and De-icing Technologies · Electrohydrodynamics and Fluid Dynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (69)
Show source-provided references
1. Oil/water separation with selective superantiwetting/superwetting surface materials10.1002/anie.201405785 ↗
2. Understanding the separations of oil/water mixtures from immiscible to emulsions on super-wettable surfaces10.1016/S1672-6529(14)60156-6 ↗
3. Harikishore Kumar Reddy · 2017 · 3
4. A superhydrophobic copper mesh as an advanced platform for oil-water separation10.1016/j.apsusc.2017.09.140 ↗
5. A numerical model for the performance assessment of hydrophobic meshes used for oil spill recovery10.1016/j.ijmultiphaseflow.2017.10.011 ↗
6. Femtosecond laser fabrication of a gradient-wettability mesh for spilled oil crossflow collection10.1016/j.matlet.2017.12.130 ↗
7. Destabilisation of oil–water emulsions and separation by dissolved air flotation10.1016/S0043-1354(01)00347-5 ↗
8. Facile fabrication of superhydrophobic/superoleophilic microporous membranes by spray-coating ytterbium oxide particles for efficient oil-water separation10.1016/j.memsci.2017.11.045 ↗
9. Chapter 12: oil-water separation with selective wettability membranes
10. Robust superhydrophobic-superoleophilic polytetrafluoroethylene nanofibrous membrane for oil/water separation10.1016/j.memsci.2017.06.060 ↗
11. Superwetting meshes with grass-like structures in the pores for highly efficient separation of oil-in-water emulsion10.1016/j.colsurfa.2017.07.036 ↗
12. Superhydrophobic copper coating: switchable wettability, on-demand oil-water separation, and antifouling10.1016/j.cej.2017.06.159 ↗
13. On-demand oil/water separation of 3D Fe foam by controllable wettability10.1016/j.cej.2017.08.081 ↗
14. A super-hydrophobic and super-oleophilic coating mesh film for the separation of oil and water10.1002/anie.200353381 ↗
15. Superhydrophilic-underwater superoleophobic ZnO-based coated mesh for highly efficient oil and water separation10.1016/j.matlet.2015.03.146 ↗
16. Fabrication of stable and durable superhydrophobic surface on copper substrates for oil-water separation and ice-over delay10.1016/j.jcis.2015.12.015 ↗
17. Facile fabrication of superhydrophobic sand: potential advantages for practical application in oil-water separation10.1016/j.jtice.2015.11.015 ↗
18. Facile fabrication of super-hydrophobic FAS modified electroless Ni-P coating meshes for rapid water-oil separation10.1016/j.colsurfa.2017.12.068 ↗
19. Fabrication of superhydrophobic-superoleophilic copper mesh via thermal oxidation and its application in oil–water separation10.1016/j.apsusc.2016.01.233 ↗
20. Low cost and non-fluoride flowerlike superhydrophobic particles fabricated for both emulsions separation and dyes adsorption10.1016/j.jcis.2017.08.021 ↗
21. Smart enrichment and facile separation of oil from emulsions and mixtures by superhydrophobic/superoleophilic particles10.1021/acsami.5b01901 ↗
22. Preparation of superhydrophobic/oleophilic copper mesh for oil-water separation10.1016/j.apsusc.2017.04.012 ↗
23. Raspberry-like superhydrophobic silica coatings with self-cleaning properties10.1016/j.ceramint.2015.05.137 ↗
24. Patterning ZrO2 films surface: superhydrophilic and superhydrophobic properties10.1016/j.ceramint.2017.01.021 ↗
25. Superhydrophobic surface decorated with vertical ZnO nanorods modified by stearic acid10.1016/j.ceramint.2013.12.052 ↗
26. Robust superhydrophobic needle-like nanostructured ZnO surfaces prepared without post chemical-treatment10.1016/j.apsusc.2017.07.216 ↗
27. Annealing temperature dependent reversible wettability switching of micro/nano structured ZnO superhydrophobic surfaces10.1016/j.apsusc.2018.02.005 ↗
28. ASTM, ASTM D870-15: Standard practice for testing water resistance of coatings using water immersion, ASTM International, 2015, p. 3.
29. Hierarchical ZnO particles grafting by fluorocarbon polymer derivative: preparation and superhydrophobic behavior10.1016/j.apsusc.2015.03.024 ↗
30. Facile fabrication of durable copper-based superhydrophobic surfaces via electrodeposition10.1021/acs.langmuir.7b02227 ↗
31. Biomimetic superhydrophobic surfaces with transition metals and their oxides: a review10.1016/S1672-6529(16)60408-0 ↗
32. A facile solution-immersion process for the fabrication of superhydrophobic gibbsite films with a binary micro-nano structure: effective factors optimization via Taguchi method10.1016/j.apsusc.2015.07.172 ↗
33. Fabrication of flower-like micro/nano dual scale structured copper oxide surfaces: optimization of self-cleaning properties via Taguchi design10.1016/j.apsusc.2017.05.259 ↗
34. Recent advances in the potential applications of bioinspired superhydrophobic materials10.1039/C4TA02071E ↗
35. Recent progress in superhydrophobic coatings used for steel protection: a review10.1016/j.colsurfa.2016.12.057 ↗
36. Fabrication of transparent superhydrophobic porous silica coating for self-cleaning and anti-fogging10.1016/j.ceramint.2016.02.105 ↗
37. Recent advances in the mechanical durability of superhydrophobic materials10.1016/j.cis.2015.12.007 ↗
38. Senez · 2014 · 13
39. Why do pigeon feathers repel water? Hydrophobicity of pennae, Cassie-Baxter wetting hypothesis and Cassie-Wenzel capillarity-induced wetting transition10.1016/j.jcis.2007.02.049 ↗
40. Water-resistant surfaces using zinc oxide structured nanorod arrays with switchable wetting property10.1016/j.surfcoat.2016.04.056 ↗
41. Superhydrophobic and superhygrophobic surfaces: from understanding non-wettability to design considerations10.1039/c3sm50881a ↗
42. Fowkes · 1964
43. Wetting behaviour of hydrophilic and hydrophobic nanostructured porous anodic alumina10.1016/j.colsurfa.2012.12.010 ↗
44. Applicability of Cassie–Baxter equation for superhydrophobic fluoropolymer–silica composite films10.1016/j.apsusc.2015.02.033 ↗
45. Determination of the receding contact angle of sessile drops on polymer surfaces by evaporation10.1021/la9900831 ↗
46. Wettability of porous surfaces10.1039/tf9444000546 ↗
47. Mild solution synthesis of zinc oxide films with superhydrophobicity and superhydrophilicity10.1039/b512239b ↗
48. Controlled fabrication of nanostructured ZnO particles and porous thin films via a modified chemical bath deposition method10.1016/j.jcrysgro.2006.02.043 ↗
49. Factors influencing the thermal stability and lead sorption capacity of hydroxyapatite manufactured by precipitation method using industrial calcium hydroxide10.1111/j.1744-7402.2011.02725.x ↗
50. Superhydrophobic palmitic acid modified ZnO nanoparticles10.1016/j.ceramint.2017.07.176 ↗
51. Raman scattering and photoluminescence studies of ZnO nanowhiskers assembled as flowers in the presence of fullerene10.1016/j.jcrysgro.2015.03.028 ↗
52. Raman studies of ZnO products synthesized by solution based methods10.12693/APhysPolA.129.803 ↗
53. Effects of hexamethylenetetramine on the nucleation and radial growth of ZnO nanowires by chemical bath deposition10.1021/acs.jpcc.6b00479 ↗
54. A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires10.1038/srep35073 ↗
55. The effect of oxygen vacancies on water wettability of a ZnO surface10.1039/c3cp51848e ↗
56. Superhydrophobic surface on copper via a one-step solvent-free process and its application in oil spill collection10.1039/C5RA06791J ↗
57. A facile electrodeposition process to fabricate corrosion-resistant superhydrophobic surface on carbon steel10.1016/j.apsusc.2016.01.252 ↗
58. Facile fabrication of a robust super-hydrophobic surface on magnesium alloy10.1016/j.colsurfa.2013.10.055 ↗
59. Durable superhydrophobic surfaces made by intensely connecting a bipolar top layer to the substrate with a middle connecting layer10.1038/s41598-017-10030-9 ↗
60. Reversibly light-switchable wettability between superhydrophobicity and superhydrophilicity of hybrid ZnO/bamboo surfaces via alternation of UV irradiation and dark storage10.1016/j.porgcoat.2015.05.028 ↗
61. Hydrophobic/hydrophilic switching on zinc oxide micro-textured surface10.1016/j.apsusc.2012.10.024 ↗
62. Stable superhydrophobic Zn/ZnO surfaces fabricated via electrodeposition on tin substrate for self-cleaning behavior and switchable wettability10.1016/j.jallcom.2018.03.108 ↗
63. Smart UV/Visible light responsive polymer surface switching reversibly between superhydrophobic and superhydrophilic10.1016/j.surfcoat.2016.12.072 ↗
64. Influence of the morphology of ZnO nanomaterials on photooxidation of polypropylene/ZnO composites10.1016/j.mssp.2017.06.023 ↗
65. Fabrication of Bioinspired Structured Superhydrophobic and Superoleophilic Copper Mesh for Efficient Oil-water Separation10.1016/S1672-6529(16)60416-X ↗
66. Surfactant-stabilized oil separation from water using ultrafiltration and nanofiltration10.1016/j.memsci.2017.02.004 ↗
67. Ultra-wetting graphene-based PES ultrafiltration membrane – A novel approach for successful oil-water separation10.1016/j.watres.2016.07.042 ↗
68. Hydrophilicity-controlled MFI-type zeolite-coated mesh for oil/water separation10.1016/j.seppur.2017.11.064 ↗
69. Cu mesh's super-hydrophobic and oleophobic properties with variations in gravitational pressure and surface components for oil/water separation applications10.1016/j.apsusc.2014.06.194 ↗