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Hsu CH, Liu CE, Lai LY, Kuo MT, He JR, Lin HP. Synthesis of Mesoporous Eu 3+-Doped Zinc/Silicate Phosphors for Highly Selective and Sensitive Detection of Sulfide Ions. ACS OMEGA 2023; 8:44229-44237. [PMID: 38027393 PMCID: PMC10666151 DOI: 10.1021/acsomega.3c06823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/10/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023]
Abstract
A mesoporous Eu3+-doped zinc/silicate phosphor with a large surface area (>100 m2g-1) and amorphous structure was prepared in an aqueous solution without using any organic template. The residual concentration of the Zn2+ ion in the filtrate is lower than the standard of effluent 3.5 ppm under a pH 8-11 preparation condition. When a sulfide ion (S2-) is present in aqueous solution, the phosphor can react with the sulfide ion to transform from the amorphous structure to the crystalline ZnS, which causes structural transformation and a subsequent decrease in luminescent intensity. This distinct phosphor with a high surface area and amorphous structure can be applied through the structure transformation mechanism for highly selective and sensitive detection of the sulfide ions at low concentrations. In addition, the luminescent efficiency was obtained from adjustments in the pH value, calcination temperature, and Eu3+ ion concentration. The quenching efficiency, the limit of detection (CLOD), S2- ion selectivity, and phosphor regeneration ability were systematically explored in sulfide ion detection tests. Due to the novel S2- ion-induced structural transformation, we found that the amorphous Eu3+-doped zinc/silicate phosphors demonstrate a CLOD sensitivity as low as 1.8 × 10-7 M and a high Stern-Volmer constant (KSV) of 3.1 × 104 M-1. Furthermore, the phosphors were easily regenerated through simple calcination at 500 °C and showed a KSV value of 1.4 × 104 M-1. Overall, the Eu3+-doped zinc/silicates showed many advantageous properties for detecting sulfide ions, including low toxicity, green synthesis, good selectivity, high sensitivity, and good renewability.
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Affiliation(s)
- Chun-Han Hsu
- General
Education Center, National Tainan Junior
College of Nursing, No. 78, Sec. 2, Minzu Road, Tainan 700, Taiwan
| | - Chao-En Liu
- Department
of Chemistry, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan
| | - Lou-Yun Lai
- Department
of Chemistry, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan
| | - Mei-Te Kuo
- Department
of Chemistry, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan
| | - Jia-Rung He
- Department
of Chemistry, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan
| | - Hong-Ping Lin
- Department
of Chemistry, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan
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Yadav P, Raju MK, Samudrala RK, Gangadhar M, Pani J, Borkar H, Azeem PA. Cost-effective akermanite derived from industrial waste for working electrodes in supercapacitor applications. NEW J CHEM 2023. [DOI: 10.1039/d2nj05066h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The aim of this study is the synthesis of an akermanite (Ca2MgSi2O7) material by sol–gel method using industrial waste (fly ash (FA) and ground-granulated blast furnace slag (GGBS)) as an initial precursor for the first time.
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Affiliation(s)
- Pooja Yadav
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
| | - M. Krishnam Raju
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
| | - Raj Kumar Samudrala
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
| | - M. Gangadhar
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
| | - Jitesh Pani
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
| | - Hitesh Borkar
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
| | - P. Abdul Azeem
- Department of Physics, National Institute of Technology, Warangal, TS, 506004, India
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Application of Response Surface Methodology for Optimization of Nanosized Zinc Oxide Synthesis Conditions by Electrospinning Technique. NANOMATERIALS 2022; 12:nano12101733. [PMID: 35630955 PMCID: PMC9144791 DOI: 10.3390/nano12101733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/10/2022] [Accepted: 05/16/2022] [Indexed: 11/21/2022]
Abstract
Zinc oxide (ZnO) is a well-known semiconductor material due to its excellent electrical, mechanical, and unique optical properties. ZnO nanoparticles are widely used for the industrial-scale manufacture of microelectronic and optoelectronic devices, including metal oxide semiconductor (MOS) gas sensors, light-emitting diodes, transistors, capacitors, and solar cells. This study proposes optimization of synthesis parameters of nanosized ZnO by the electrospinning technique. A Box–Behnken design (BB) has been applied using response surface methodology (RSM) to optimize the selected electrospinning and sintering conditions. The effects of the applied voltage, tip-to-collector distance, and annealing temperature on the size of ZnO particles were successfully investigated. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirm the formation of polyvinylpyrrolidone-zinc acetate (PVP-ZnAc) fibers and nanostructured ZnO after annealing. X-ray diffraction (XRD) patterns indicate a pure phase of the hexagonal structure of ZnO with high crystallinity. Minimal-sized ZnO nanoparticles were synthesized at a constant applied potential of 16 kV, with a distance between collector and nozzle of 12 cm, flow rate of 1 mL/h, and calcination temperature of 600 °C. The results suggest that nanosized ZnO with precise control of size and morphology can be fabricated by varying electrospinning conditions, precursor solution concentration, and sintering temperature.
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The characteristics on structural and optical of Co3O4 incorporated Zn2SiO4 for phosphor approaches. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Alibe IM, Matori KA, Zaid MHM, Nasir S, Alibe AM, Khiri MZA. Polymer Thermal Treatment Production of Cerium Doped Willemite Nanoparticles: An Analysis of Structure, Energy Band Gap and Luminescence Properties. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1118. [PMID: 33673655 PMCID: PMC7957781 DOI: 10.3390/ma14051118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 01/29/2021] [Accepted: 02/07/2021] [Indexed: 12/03/2022]
Abstract
The contemporary market needs for enhanced solid-state lighting devices has led to an increased demand for the production of willemite based phosphors using low-cost techniques. In this study, Ce3+ doped willemite nanoparticles were fabricated using polymer thermal treatment method. The special effects of the calcination temperatures and the dopant concentration on the structural and optical properties of the material were thoroughly studied. The XRD analysis of the samples treated at 900 °C revealed the development and or materialization of the willemite phase. The increase in the dopant concentration causes an expansion of the lattice owing to the replacement of larger Ce3+ ions for smaller Zn2+ ions. Based on the FESEM and TEM micrographs, the nanoparticles size increases with the increase in the cerium ions. The mean particles sizes were estimated to be 23.61 nm at 1 mol% to 34.02 nm at 5 mol% of the cerium dopant. The optical band gap energy of the doped samples formed at 900 °C decreased precisely by 0.21 eV (i.e., 5.21 to 5.00 eV). The PL analysis of the doped samples exhibits a strong emission at 400 nm which is ascribed to the transition of an electron from localized Ce2f state to the valence band of O2p. The energy level of the Ce3+ ions affects the willemite crystal lattice, thus causing a decrease in the intensity of the green emission at 530 nm and the blue emission at 485 nm. The wide optical band gap energy of the willemite produced is expected to pave the way for exciting innovations in solid-state lighting applications.
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Affiliation(s)
- Ibrahim Mustapha Alibe
- Material Synthesis and Characterization Laboratory (MSCL), Institute of Advanced Technology (ITMA), Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia
- National Research Institute for Chemical Technology Zaria, Zaria P.M.B. 1052, Kaduna State, Nigeria
| | - Khamirul Amin Matori
- Material Synthesis and Characterization Laboratory (MSCL), Institute of Advanced Technology (ITMA), Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia
- Department of Physics, Faculty of Science, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia;
| | - Mohd Hafiz Mohd Zaid
- Department of Physics, Faculty of Science, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia;
| | - Salisu Nasir
- Department of Chemistry, Faculty of Science, Federal University Dutse, Dutse P.M.B. 7156, Jigawa State, Nigeria;
| | - Ali Mustapha Alibe
- Mechanical Engineering Departments, Federal Polytechnic Damaturu, Damaturu 620221, Yobe State, Nigeria;
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