Department of Chemistry, University of Swabi, Swabi Anbar 23561, Khyber Pakhtunkhwa, Pakistan.
Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Nov 5;241:118671. doi: 10.1016/j.saa.2020.118671. Epub 2020 Jul 2.
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 ions followed by subsequent reduction with NaBH 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 NaBH which act as a reducing agent. Similarly, the catalytic efficiency was also assessed against the removal of dyes. The linear relationship and K were obtained from pseudo-first-order kinetics. The rate constant K of CA@Ni NPs for the reduction of PNP is 1.5 × 10 and CA-ZA2@Ni (K = 2.6 × 10), CA-ZA5@Ni (K = 3.2 × 10), and CA-ZA10@Ni is 5.7 × 10 min. 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 while the adjacent R is 0.9013. Similarly, the rate constant and adjacent R values were calculated for the degradation of other dyes and nitrophenols.
在这项工作中，通过简单的浇铸法合成了纤维素乙酸酯聚合物 (CA) 薄片和以层状双氢氧化物 (ZnAl/C-LDH) 形式生长的 2% ZnAl 接枝活性炭 (ZnAl/C-LDH)，掺入 CA 聚合物 (CA-ZA2) 5wt%（CA-ZA5）和 10wt% 的 ZnAl/C-LDH（CA-ZA10）片中。所有所述薄片均通过吸附 Ni 离子随后用 NaBH 还原来制备零价 Ni 纳米粒子，并命名为 CA@Ni、CA-ZA2@Ni、CA-ZA5@Ni 和 CA-ZA10@Ni NPs。通过 FESEM、FTIR、XRD 和 EDS 技术研究了合成的 Ni NPs。这些负载和稳定的 Ni NPs 主要用于在 NaBH 作为还原剂的存在下还原 4-硝基苯酚 (PNP) 和 2-硝基苯酚 (ONP)。同样，还评估了它们对染料去除的催化效率。通过准一级动力学获得线性关系和 K。CA@Ni NPs 还原 PNP 的速率常数 K 为 1.5×10，CA-ZA2@Ni（K=2.6×10），CA-ZA5@Ni（K=3.2×10），和 CA-ZA10@Ni 是 5.7×10 min。CA-ZA10@Ni NPs 对 PNP 还原的速率常数最高。用 ZA10@Ni NPs 去除 CR 的速率为 2.05×10，而相邻的 R 为 0.9013。同样，计算了其他染料和硝基苯酚降解的速率常数和相邻 R 值。
