In this study, nano crystalline zinc hydroxide nitrate powder was synthesized by a sol – gel method using NaOH and Zn(NO3) H2O as precursors, yielding several grams products per batch. The products were characterized by XRD, FTIR, SEM and BET, indicating the initial molar ratio NaOH : Zn(NO3) = and reaction time 1 hour as suitable. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K6- 2016 Synthesis of zinc hydroxide nitrate complex by a sol-gel method for use as foliar fertilizers – a scale up approach Le Tu Chau Ngo Manh Thang Faculty of Chemical Engineering, Ho Chi Minh city University of Technology, VNU-HCM. (Manuscript Received on July, 2016, Manuscript Revised on September, 2016) ABSTRACT Zinc hydroxide nitrate complex is a new class of materials with outstanding BET, indicating the initial molar ratio NaOH : Zn(NO3) = and reaction time 1 hour characteristics promising its application as as suitable. Under the indicated conditions, the foliar nano-fertilizers. In this study, nano crystalline zinc hydroxide nitrate powder was particle size of products is in the range 50÷100 nm. The characteristics of products demonstrate synthesized by a sol – gel method using NaOH and Zn(NO3) H2O as precursors, yielding their potential application as foliar nanofertilizer and the synthesis procedure might be several grams products per batch. The products were characterized by XRD, FTIR, SEM and further upgrading to production extents. Keywords: Foliar fertilizer, nano-fertilizer, scale-up procedure, Zinc hydroxide nitrate, sol-gel method. 1. INTRODUCTION Folia fertilizers have been applied in increasing extents and become indispensable to high-tech agriculture. Recently, zinc hydroxide nitrate Zn5(OH)8(NO3) had been reported as a potential long-term zinc supplying foliar fertilizer owing to its appropriate characteristics, . stable nano sized crystals with sheet-like morphology, positively charged surface and moderate solubility in water [1,2]. Moreover, copper could be involved to provide foliar fertilizers functioning as dual micronutriens to foliars [3]. In fact, Zn5(OH)8(NO3) has been known for a long time as a representantive of layered hydroxide salts. Its preparation was newly patented concerning application as foliar fertilizer [4]. However, only the .
