title: Selective determination of gold(III) ion using CuO microsheets as a solid phase adsorbent prior by ICP-OES measurement.
abstract: We have prepared calcined CuO microsheets (MSs) by a wet-chemical process using reducing agents in alkaline medium and characterized by UV/vis., fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD), and field-emission scanning electron microscopy (FESEM) etc. The detailed structural, compositional, and optical characterizations of the MSs were evaluated by XRD pattern, FT-IR, X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy, respectively which confirmed that the obtained MSs are well-crystalline CuO and possessed good optical properties. The CuO MSs morphology was investigated by FESEM, which confirmed that the calcined nanomaterials were sheet-shaped and grown in large-quantity. Here, the efficiency of the CuO MS was applied for a selective adsorption of gold(III) ion prior to its detection by inductively coupled plasma-optical emission spectrometry (ICP-OES). The selectivity of CuO MSs towards various metal ions, including Au(III), Cd(II), Co(II), Cr(III), Fe(III), Pd(II), and Zn(II) was analyzed. Based on the adsorption isotherm study, it was confirmed that the selectivity of MSs phase was mostly towards Au(III) ion. The static adsorption capacity for Au(III) was calculated to be 57.0 mg g(-1). From Langmuir adsorption isotherm, it was confirmed that the adsorption process was mainly monolayer-adsorption onto a surface containing a finite number of adsorption sites.
authors.affiliation: Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah 21589, P.O. Box 80203, Saudi Arabia. mmrahman@kau.edu.sa
authors.forename: Mohammed M
authors.initials: MM
authors.lastname: Rahman
authors.forename: Sher Bahadar
authors.initials: SB
authors.lastname: Khan
authors.forename: Hadi M
authors.initials: HM
authors.lastname: Marwani
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
authors.forename: Khalid A
authors.initials: KA
authors.lastname: Alamry
authors.forename: Abdulrahman O
authors.initials: AO
authors.lastname: Al-Youbi
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D006046:Gold / Q000032:analysis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D033362:Powder Diffraction; D013053:Spectrophotometry / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D006046:Gold; D003300:Copper; C030973:cupric oxide