Abstract
In this work, β-Ni(OH)2 monolayer nanosheets, which had been thought to be unachievable, were successfully prepared for the first time by a one-pot strategy using epoxide as precipitation agent and sodium dodecyl sulfate (SDS) as surfactant. The characterization results indicate that the formation of monolayer morphology depends on the mediation of SDS molecules. The XRD patterns demonstrate the loose and defective packing of Ni(OH)2 layers in the SDS intercalated samples. The disappearing of vibration band of free hydroxyl groups in the FTIR spectra suggests the interlayer separation resulted by SDS. The TEM and AFM images further confirm the formation of monolayer nanosheets. It is proposed that the in situ modification of the secondary growth unit of β-Ni(OH)2 by SDS allows its two-dimensional anisotropic growth through steric hindrance of SDS molecules. In addition, this effect allows isolation of β-Ni(OH)2 from solvent with keeping of monolayer nanosheet state in dry powder. The electrochemical measurement results indicate that β-Ni(OH)2 monolayer nanosheets own much higher urea electrolysis performance than their corresponding multilayer structure.
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Aghazadeh M, Golikand AN, Ghaemi M (2011) Synthesis, characterization, and electrochemical properties of ultrafine β-Ni(OH)2 nanoparticles. Int J Hydrogen Energ 36:867–8679
Bernard MC, Cortes R, Keddam M, Takenouti H, Bernard P, Senyarich S (1996) Structural defects and electrochemical reactivity of β-Ni(OH)2. J Power Source 63:247–254
Boggs BK, King RL, Botte GG (2009) Urea electrolysis: direct hydrogen production from urine. Chem Commun 4859–4861
Cai FS, Zhang GY, Chen J, Gou XL, Liu HK, Dou SX (2004) Ni(OH)2 tubes with mesoscale dimensions as positive-electrode materials of alkaline rechargeable batteries. Angew Chem Int Ed 43:4212–4216
Gash AE, Satcher JH, Simpson RL (2004) Monolithic nickel(II)-based aerogels using an organic epoxide: the importance of the counterion. J Non-Cryst Solids 350:145–151
Hua GX, Li CX, Gong H (2010) Capacitance decay of nanoporous nickel hydroxide. J Power Sources 195:6977–6981
Jiang H, Zhao T, Li CZ, Ma J (2011) Hierarchical self-assembly of ultrathin nickel hydroxide nanoflakes for high-performance supercapacitors. J Mater Chem 21:3818–3823
Lee JW, Ko JM, Kim JD (2011) Hierarchical microspheres based on α-Ni(OH)2 nanosheets intercalated with different anions: synthesis, anion exchange, and effect of intercalated anions on electrochemical capacitance. J Phys Chem C 115:19445–19454
Liu Y, Ren WZ, Han J, Cui HT (2012) Synthesis of hausmannite and kempite nanoparticles at low temperature via an epoxide precipitate route. Micro Nano Lett 7:178–182
Manthiram A, Murugan AV, Sarkar A, Muraliganth T (2008) Nanostructured electrode materials for electrochemical energy storage and conversion. Energy Environ Sci 1:621–638
Nai JW, Wu JL, Guo L, Yang SH (2012) Coordination polyhedra: a probable basic growth unit in solution for the crystal growth of inorganic nonmetallic nanomaterials? Cryst Growth Des 12:2653–2661
Rajamathi M, Subbanna GN, Kamath PV (1997) On the existence of a nickel hydroxide phase which is neither α nor β. J Mater Chem 7:2293–2296
Rajamathi M, Kamath PV, Seshadri R (2000) Polymorphism in nickel hydroxide: role of interstratification. J Mater Chem 10:503–506
Shintaro I, Daisuk S, Michio K (2008) Synthesis of hexagonal nickel hydroxide nanosheets by exfoliation of layered nickel hydroxide intercalated with dodecyl sulfate ions. J Am Chem Soc 130:14038–14039
Tang Z, Tang CH, Gong H (2012) A high energy density asymmetric supercapacitor from nano-architectured Ni(OH)2/carbon nanotube electrodes. Adv Funct Mater 22:1272–1278
Wang D, Yan W, Botte GG (2011) Exfoliated nickel hydroxide nanosheets for urea electrolysis. Electrochem Commun 13:1135–1138
Wang L, Wang D, Dong XY, Zhang ZJ, Pei XF, Chen XJ, Chen B, Jin J (2011) Layered assembly of graphene oxide and Co–Al layered double hydroxide nanosheets as electrode materials for supercapacitors. Chem Commun 47:3556–3558
Wang G, Zhang L, Zhang J (2012) A review of electrode materials for electrochemical supercapacitors. Chem Soc Rev 41:797–828
Watanabe K, Kikuoka T (1995) Physical and electrochemical characteristics of nickel hydroxide as a positive material for rechargeable alkaline batteries. J Appl Electrochem 25:219–226
Yan J, Sun W, Wei T, Zhang Q, Fan ZJ, Wei F (2012) Fabrication and electrochemical performances of hierarchical porous Ni(OH)2 nanoflakes anchored on graphene sheets. J Mater Chem 22:11494–11502
Yi QF, Zhang JJ, Huang W, Liu XP, Li L (2007) Electrocatalytic oxidation of cyclohexanol on a nickel oxyhydroxide modified nickel electrode in alkaline solutions. Catal Commun 8:1017–1022
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This work is financially supported by National Natural Science Foundation of China (20971107) and Shangdong Provincial Engineering Research Center for Light Hydrocarbon Comprehensive Utilization.
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Wang, M., Ren, W., Zhao, Y. et al. One-pot synthesis of powder-form β-Ni(OH)2 monolayer nanosheets with high electrochemical performance. J Nanopart Res 15, 1849 (2013). https://doi.org/10.1007/s11051-013-1849-1
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DOI: https://doi.org/10.1007/s11051-013-1849-1