Parameters Optimization Based on the Taguchi Robust Design for the Synthesis of CuO–ZnO Nanocomposite Using the Surfactant-Assisted Coprecipitation Method

Abstract

The Taguchi robust design method with L 8 (2 7 ) orthogonal array was implemented to optimize experimental conditions for the preparation of a CuO-ZnO nanocomposite using a surfactantassisted coprecipitation method. Calcination temperature, molarities of Cu and Zn ions, pH at the end of precipitation, capping agent, drying temperature, microwave power, and precipitating agent were chosen as main parameters. It was found that the capping agent was the main factor on the specific surface area of CuO-ZnO nanocomposite. The synthesized particles were characterized by scanning electron microscopy (SEM), laser light scattering (LLS), BET surface analyzer, Fourier-transform infrared spectroscopy (FT-IR), x-ray diffraction (XRD), and energy dispersive x-ray (EDX). By the optimization of a coprecipitation method, CuO-ZnO nanocomposite (particle size 19.1 nm and specific surface area 102.1 m 2 /g) with a narrow particle size distribution was prepared.

Properties of Cu/ZnO/Al2O3 Catalysts Modified by Titanium Additives in Synthesis of Methanol from Syngas Using Orthogonal Experimental Design

“…In general, orthogonal experimental design is a combination of mathematical and statistical techniques to characterize a complicated process and reduce the number of required experiments 9,10 . In this work, four main parameters during co-precipitation were investigated: precipitating temperature (A), precipitating mode (B), additive (C) and precipitating environment (D).…”

“…Since the 1960s, ternary Cu/ZnO/Al2O3 catalysts developed by ICI have been used in industrial synthesis of methanol form syngas, a mixture of H2, CO and CO2. Such a heterogeneous process is usually operated at low temperature (200-300 ºC) and pressure (5)(6)(7)(8)(9)(10). These copper-based catalysts are typically prepared by conventional co-precipitation using nitrates of Cu, Zn and Al as well as alkali bicarbonates or alkali carbonates as basic precipitating agents, then followed by calcination of the precursors and reduction of the calcined products 1 .…”

Biosafe, Renewable, and Optically Active Diacids Containing Amino Acid as Coupling Agents for the Modification of ZnO Nanoparticles

“…Sol-gel synthesis, among the different synthetic paths, has been generally used due to its easiness, commercial feasibility, and good potential for preparing large scale inorganic production of nanomaterials. [14][15][16] However, ZnO due to its hydrophilic surface and having high surface energy and large surface area are prone to aggregate and cannot disperse uniformly in organic matrix. To increase dispersion, it is essential to modify the surface of NPs.…”

“…[8][9][10][11][12] In addition these NPs have biocompatible and biodegradable features that have been widely used in drug delivery, cancer treatment, medical products, sun creams and as inhibitor for the growth of microorganisms. [3,13,14] ZnO NPs can be synthesized with different methods such as sol-gel technique, microemulsion synthesis, thermal evaporation, microwave and sonoassisted synthesis, homogeneous precipitation, spray pyrolysis, drying, and chemical vapor deposition. Sol-gel synthesis, among the different synthetic paths, has been generally used due to its easiness, commercial feasibility, and good potential for preparing large scale inorganic production of nanomaterials.…”

Synthesis of Graphite Oxide-Wrapped CuO Nanocomposites for Electrocatalytic Oxidation of Glucose

“…Transition metal oxides CuO is a narrow band gap p-type semiconductor (1.2 eV) and has been recognized as an important material for a variety of practical applications, such as catalysis, batteries, solar energy conversion, gas sensing, and field emission. [7][8][9][10][11][12] But its noticeable disadvantages, including low conductivity and large volume change during the cycle process, [13][14][15] make it difficult to meet the demands of high-rate capability and a long-term life cycle.…”