Rapid and high-capacity adsorption of sulfonated anionic dyes onto basic bismuth(iii) nitrate via bidentate bridging and electrostatic attracting interactions

Abstract

Rapid and high-capacity adsorption of sulfonated anionic dyes onto basic bismuth(iii) nitrate via bidentate bridging and electrostatic attractive interactions.

Thermal transformations of bismuth (III) tartrates

“…For the IR spectrum of the bismuth nitrate-tartrate 2, 2), along with the absorption bands of the carboxylate group (1590 and 1390 cm -1 ) [26], we observed band broadening in the region of 1400-1280 cm -1 and the appearance of a significant shoulder at 1310 cm -1 , which appears to be due to the absorption of nitrate ions [27]. A broad band with a maximum at 3400 cm -1 relates to the valence vibrations of the О-Н bond of water molecules and oxo-groups of tartrate ions involved in the formation of hydrogen bonds [28].…”

“…In the spectrum of the nitrate-tartrate complex two bands are observed in this region, indicating the presence of unsubstituted protons of alcohol groups. Weak wide bands with maxima at 470 and 140 cm -1 are related to the valence and deformation vibrations of the Bi-O bond, respectively [27]. The presence of water in the compound is indicated by a wide diffuse band in the area of 3650-2800 cm -1 , corresponding to valence ν(OH) vibrations of water, as well as a band of plane deformation δ(OH) vibrations of water at 1700-1640 cm -1 , which show as a shoulder with a maximum at 1638 cm -1 [29].…”

Ultrasonic treatment of wastewater contaminated with various dyes using tin oxide hydroxide nanoparticles loaded on activated carbon: Synthesis, performance, mechanism and statistical optimization

“…In this set of experiments, the initial MO concentration and adsorbent mass were constant at 16 mg l −1 and 0.02 g, respectively. Enhancement in MO adsorption onto Sn 6 O 4 (OH) 4 ‐NPs‐AC at lower pH values probably is attributed to the protonation of the surface of adsorbent which owing to electrostatic attraction is able to adsorb MO while at higher pH electrostatic repulsion between MO and negative charge adsorbent and possible completion of OH with MO lead to lower adsorption …”

Preparation of a Bi6O5(OH)3(NO3)5·2H2O/AgBr composite and its long-lasting antibacterial efficacy

“…The peaks at 817 and 879 cm −1 are assigned to bending bands of NO 3 − groups. 40,41 The peaks at 1049 and 1107 cm −1 are related to symmetric stretching and bending vibrations of NO 3 − groups, respectively. 40,42 The strong peak at 1335 cm −1 is attributed to the asymmetric stretching vibration of NO 3 − groups.…”