Electrochemical synthesis and characterization of basic bismuth nitrate [Bi6O5(OH)3](NO3)5·2H2O: a potential highly efficient sorbent for textile reactive dye removal

Abstract

A new method of synthesis was developed for the preparation of basic bismuth nitrate [Bi 6 O 5 (OH) 3 ](NO 3) 5 •2H 2 O (ECBBN). Electrochemical synthesis of the material was carried out by galvanostatic electrodeposition from an acidic Bi(III) solution on a Ti substrate and further thermal treatment in air at 200 °C. Characterization of ECBBN was conducted by employing SEM-EDX, N 2 adsorption, XRD and FTIR, and its pI was also determined. The analyses showed that the material obtained was pure [Bi 6 O 5 (OH) 3 ](NO 3) 5 •2H 2 O. Morphologically, ECBBN aggregates were composed of crystals, some smaller than 50 nm. Electrochemically synthesized sorbent (ECBBN) was used for the removal of the textile dye Reactive Blue 19 (RB19) from deionized water and model solutions of polluted river water, and it showed considerably superior sorption performance compared to other inorganic sorbents synthesized by conventional methods reported in the literature. A kinetic study suggests that the sorption process is both under reaction and difusion control. Equilibration of the sorption process was attained in several minutes, i.e. the sorption process is very fast. The sorption equilibrium data were well interpreted by the Langmuir, Redlich-Peterson and Brouers-Sotolongo isotherm. Using Langmuir isotherm, the maximum sorption capacity of ECBBN was reached at pH 2 and was 1049.19 mg g −1 .

Photocatalytic Degradation of Quinolones by Magnetic MOFs Materials and Mechanism Study

“…Then, 0.2 g of adsorbent was added to each solution, which was sealed and stirred for 24 h to measure the final pH (pH f ). The pH f value was plotted against the initial pH value (pH i ) and the pI was determined from the pH i = pH f [37]. The isoelectric point (pI) of the synthesised MIL-100(Fe) sorbent determined by the salt addition method was 2.02, which showed that the sorbent was strongly acidic.…”

Self‐Healable Metallogels for Selective Dye Adsorption

“…Industrial progress and the current lifestyle led to the dumping of hazardous materials into the water [5] . Among the well‐known environmental pollutants, water‐soluble organic dyes are the major contributors to the aquatic environment [6,7] . The organic dyes are toxic due to their carcinogenic and non‐biodegradable nature [7] .…”

“…[5] Among the well-known environmental pollutants, water-soluble organic dyes are the major contributors to the aquatic environment. [6,7] The organic dyes are toxic due to their carcinogenic and non-biodegradable nature. [7] When discharged without proper treatment, it causes severe damage to human health, aquatic biota, and ecotopes of the earth.…”