Cu-Doped 1D Hydroxyapatite as a Highly Active Catalyst for the Removal of 4-Nitrophenol and Dyes from Water

Abstract

Metallic copper nanoparticle (Cu NP)-doped 1D hydroxyapatite was synthesized using a simple chemical reduction method. To describe the structure and composition of the Cu/HAP nanocomposites, physicochemical techniques such as X-ray diffraction, Fourier transform infrared spectroscopy, inductively coupled plasma, N 2 adsorption–desorption, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy were used. The TEM scan of the Cu/HAP nanocomposite revealed a rod-like shape with 308 nm length and 117 nm width on average. The catalytic activity of Cu/HAP nanocomposites for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of NaBH 4 has been thoroughly investigated. The 0.7% Cu/HAP nanocomposite was shown to have superior catalytic activity than the other nanocomposites, converting 4-NP to 4-AP in ∼1 min with good recyclability. Moreover, this nanocomposite showed excellent catalytic performance in the organic dye reduction such as Congo red and acriflavine hydrochloride dyes. The high dispersion of Cu NPs on HAP support, the high specific surface area, and the small Cu particles contributed to its remarkable catalytic performance.

Optimization of methyl orange decolorization by bismuth(0)-doped hydroxyapatite/reduced graphene oxide composite using RSM-CCD

“…Figure 4 shows the general and partial XPS survey of Bi/HAp-rGO. In the general scanning spectrum of Bi/HAp-rGO, C 1 s and O 1 s arising from rGO and P 2 s, P 2p, Ca 2p, and Ca 3p peaks from HAp were observed (El-Aal et al 2022 ; Zhang et al 2015 ). In addition, Bi 4p, Bi 4d, Bi 5f, and Bi 4p peaks were detected indicating the presence of Bi in the catalyst system (Fig.…”

A Review on the Synthesis and Fabrication of Gold Nanoparticles and Their Application in Dyes Degradation

“…Therefore, getting rid of 4-NP is crucial [68]. Due to their highly polar properties, they are extensively soluble in water and are predicted to exhibit reverse osmosis and chemical coagulation so its removal is necessary [69].…”

Ag NPs decorated on the magnetic rod-like hydroxyapatite/MIL-101(Fe) nanocomposite as an efficient catalyst for the reduction of some nitroaromatic compounds and as an effective antimicrobial agent

“…35,36 The mechanism of reaction for the reduction Comparison between the obtained results to the reduction of 4-NP in the presence of HAP/MIL-101(Fe)/Ag/Fe 3 O 4 catalyst and NaBH 4 with other reported catalysts is indicated in Table 1. [39][40][41][42][43][44][45][46][47][48][49][50][51][52] From Table 1, it can be seen that the reaction in the presence of the HAP/MIL-101(Fe)/Ag/Fe 3 O 4 catalyst required a shorter reaction time compared with most of the reported catalysts, which conrms the potential of the current catalyst for the reduction of 4-nitrophenol in aqueous solutions. Among the various nanoparticles that are known as antimicrobial agents, Ag NPs have been widely studied.…”