Ni/Zn Layered Double Hydroxide (LDH) Micro/Nanosystems and Their Azorubine Adsorption Performance

Abstract

A membranous shaped Ni/Zn layered double hydroxide based nanohybrid was obtained using a low-cost template-free hydrothermal process at optimized growth conditions of 180 °C for 6 h. The synthesized nanohybrid was structurally, texturally and morphologically characterized using different techniques such as X-ray diffraction, FTIR, XPS spectroscopy, BET analysis and FESEM microscopy. The adsorption performance of our product was estimated through the Azorubine dye removal from synthetic wastewater. We therefore studied the synergic effects of Ni/Zn adsorbent dosage, contact time, pH, adsorbate concentration, stirring speed and temperature on the Azorubine adsorption efficiency. In this investigation, we obtained bi-structure based nanoadsorbent with 54% crystallinity order composed of nickel hydrate and zinc carbonate hydroxides in irregular nanoflake-like mesoporous nanohybrid morphology. Interestingly, it was also revealed to have high specific surface area (SSA) of around 110 m2 g−1 with important textural properties of 18 nm and 0.68 cm3 g−1 average pore size and volume, respectively. Moreover, the adsorption results revealed that this novel Ni/Zn layered double hydroxide (Ni/Zn LDH) was an efficient adsorbent for Az molecule and possesses an adsorptive ability exhibiting a short equilibrium time (60 min) and a high Az adsorption capability (223 mg g−1). This fast removal efficiency was attributed to high contact surface area via mesoporous active sites accompanied with the presence of functional groups (OH− and CO32−). In addition, the Langmuir and Freundlich isotherms were studied, and the results fitted better to the Langmuir isotherm.

Extraordinarily harvesting waste heat by thermally regenerative Zn-ion battery

“…Fourier Transform Infrared Spectroscopy (FTIR) and Raman spectra (Fig. 2e) show that the absorption peaks locate at 400-800 cm − 1 , 964 cm − 1 , and 1635 cm − 1 , which are also consistent with the characteristic vibration peaks of Zn/Ni-OH, SO 4 2− and H 2 O in LDH materials [48][49][50] , respectively.…”

Experimental study of photo electro‐Fenton method for the removal of Reactive Yellow 186: Influence of operational parameters

“…In such cases, Fenton's electrochemical oxidization method can be an excellent alternative method. This method confirms the color removal and pollutant molecule destruction 3 . Improved electrochemical oxidation technique recently developed (electrochemical advanced oxidation processes) like photo electro‐Fenton (PEF) process, encompassing the years of 2010 to 2019 as a successful method of wastewater remediation 4,5 …”

“…This method confirms the color removal and pollutant molecule destruction. 3 Improved electrochemical oxidation technique recently developed (electrochemical advanced oxidation processes) like photo electro-Fenton (PEF) process, encompassing the years of 2010 to 2019 as a successful method of wastewater remediation. 4,5 In textile industry synthesis dyes are discharged into waste streams from leftover dye baths.…”

Ecological synthesis of nickel–zinc–aluminium layered double hydroxides (Ni–Zn–Al LDH) in flow infrared radiated agitated tubular reactor (flow-IR-ATR)

“…The formation of additional forms of metal carbonates, mainly ZnCO 3 , was also confirmed. Ni2p, Zn2p, and Al2p indicate that the oxidation state of these elements is mainly based on ions [28].…”