A template of cellulose acetate polymer-ZnAl/C layered double hydroxide composite fabricated with Ni NPs: Applications in the hydrogenation of nitrophenols and dyes degradation

Shahid Ali Khan; Esraa M Bakhsh; Kalsoom Akhtar; Sher Bahadar Khan

doi:10.1016/j.saa.2020.118671

A template of cellulose acetate polymer-ZnAl/C layered double hydroxide composite fabricated with Ni NPs: Applications in the hydrogenation of nitrophenols and dyes degradation

Spectrochim Acta A Mol Biomol Spectrosc. 2020 Nov 5:241:118671. doi: 10.1016/j.saa.2020.118671. Epub 2020 Jul 2.

Authors

Shahid Ali Khan¹, Esraa M Bakhsh², Kalsoom Akhtar², Sher Bahadar Khan³

Affiliations

¹ Department of Chemistry, University of Swabi, Swabi Anbar 23561, Khyber Pakhtunkhwa, Pakistan. Electronic address: shahidsawal007@gmail.com.
² Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia.
³ Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia. Electronic address: sbkhan@kau.edu.sa.

PMID: 32650247
DOI: 10.1016/j.saa.2020.118671

Abstract

In this work, cellulose acetate polymer (CA) sheet and 2% ZnAl grafted on activated carbon grown in the form of layered double hydroxide (ZnAl/C-LDH) incorporated into CA polymer (CA-ZA2) 5 wt% (CA-ZA5) and 10 wt% of ZnAl/C-LDH (CA-ZA10) sheets were synthesized by simple casting method. All the stated sheets were fabricated with zero-valent Ni nanoparticles by adsorption of Ni⁺² ions followed by subsequent reduction with NaBH₄ and named as CA@Ni, CA-ZA2@Ni, CA-ZA5@Ni, and CA-ZA10@Ni NPs. The synthesized Ni NPs were investigated through FESEM, FTIR, XRD and EDS techniques. These supported and stabilized Ni NPs were largely used for the reduction of 4-nitrophenol (PNP), and 2-nitrophenol (ONP) in the presence of NaBH₄ which act as a reducing agent. Similarly, the catalytic efficiency was also assessed against the removal of dyes. The linear relationship and K_app were obtained from pseudo-first-order kinetics. The rate constant K_app of CA@Ni NPs for the reduction of PNP is 1.5 × 10^-1 and CA-ZA2@Ni (K_app = 2.6 × 10^-1), CA-ZA5@Ni (K_app = 3.2 × 10^-1), and CA-ZA10@Ni is 5.7 × 10^-1 min^-1. The highest rate constant for PNP reduction was observed with CA-ZA10@Ni NPs. The rate of CR removal with ZA10@Ni NPs is 2.05 × 10^-1 while the adjacent R² is 0.9013. Similarly, the rate constant and adjacent R² values were calculated for the degradation of other dyes and nitrophenols.

Keywords: CA-ZA10@Ni; Characterization; Pollutants degradation.