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Kurudirek SV, Kurudirek M, Erickson A, Hertel N, Sellin PJ, Tratsiak Y, Lawrie BJ, Melcher CL, Summers CJ. Solution processed high aspect ratio ultra-long vertically well-aligned ZnO nano scintillators for potential X-ray imaging applications. Sci Rep 2024; 14:15803. [PMID: 38982100 PMCID: PMC11233702 DOI: 10.1038/s41598-024-61895-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 05/10/2024] [Indexed: 07/11/2024] Open
Abstract
We report the photon (PL), electron (CL) and X-ray (XEL) induced luminescence characteristics of high aspect ratio ultra-long (~ 50 µm) ZnO nanorods (NRs) and discuss the potential for fast X-ray detection based on the consistent and efficient visible emission (~ 580 nm) from ZnO NRs. Nanostructured ZnO scintillators were rearranged to form a vertically well-aligned NR design in order to help light absorption and coupling resulting in luminescent and fast scintillation properties. The design of the nanorod array combines the key advantages of a low-cost growth technique together with environmentally friendly and widely available materials. A low temperature hydrothermal method was adopted to grow ZnO NRs in one cycle growth and their structural, optical and X-ray scintillation properties were investigated. The relatively short (~ 10 µm) ZnO NRs emitting in the near-band-edge region were found to be almost insensitive to X-rays. On the other hand, the higher XEL response of long ZnO NRs, which is a key parameter for evaluation of materials to be used as scintillators for high quality X-ray detection and imaging, along with a decay time response in the order of ns confirmed promising scintillation properties for fast and high-resolution X-ray detector applications.
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Affiliation(s)
- Sinem V Kurudirek
- Nuclear and Radiological Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
| | - Murat Kurudirek
- Nuclear and Radiological Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- Department of Physics, University of Surrey, Guildford, GU2 7XH, UK.
- Department of Electricity and Energy, Technical Sciences Vocational College, Ataturk University, 25240, Erzurum, Turkey.
| | - Anna Erickson
- Nuclear and Radiological Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Nolan Hertel
- Nuclear and Radiological Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Paul J Sellin
- Department of Physics, University of Surrey, Guildford, GU2 7XH, UK
| | - Yauhen Tratsiak
- Scintillation Materials Research Center, University of Tennessee, Knoxville, TN, 37996, USA
| | - Benjamin J Lawrie
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Charles L Melcher
- Scintillation Materials Research Center, University of Tennessee, Knoxville, TN, 37996, USA
- Department of Nuclear Engineering, University of Tennessee, Knoxville, TN, 37996, USA
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Christopher J Summers
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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Swedha M, Okla MK, Al-Amri SS, Alaraidh IA, Al-Ghamdi AA, Mohebaldin A, Abdel-Maksoud MA, Aufy M, Studenik CR, Thomas AM, Raju LL, Khan SS. Green synthesis of two-electron centre based ZnO/NiCo 2S 4 QDs-OVs using Punica granatum fruit peel extract for an exceptional visible light photocatalytic degradation of doxycycline and ciprofloxacin. CHEMOSPHERE 2022; 304:135225. [PMID: 35697102 DOI: 10.1016/j.chemosphere.2022.135225] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
Biosynthesis of nanomaterials using plant extract makes them attractive in the field of photocatalysis as they are environmental friendly. The current study focused on the biosynthesis of ZnO/NiCo2S4 QDs (NCs) using Punica granatum fruit peel extract as the reducing agent. The nanomaterials were characterized with XRD, FTIR, Raman, SEM, TEM, UV-vis DRS, BET, PL, EIS, and ESR analysis and were used for photocatalytic degradation of doxycycline (DOX) and ciprofloxacin (CIP). The bandgap of ZnO is 3.2 eV, and the decoration of NiCo2S4 QDs aids in narrowing the bandgap (2.8 eV), making the NCs visible light active. The fabricated NCs achieved 99 and 89% degradation of DOX and CIP respectively. The photocatalytic efficiency of ZnO/NiCo2S4 QDs was much higher compared to individual ZnO and NiCo2S4 QDs. The half-life period of DOX and CIP were evaluated to be 58 and 152 min respectively. The percentage of TOC removal in the photodegraded product of DOX and CIP was estimated to be 99 and 89% respectively, indicating the mineralization of the compounds. The enhanced photocatalytic efficiency of the NCs was attributed to the narrowed visible light active bandgap, synergistic charge transfer across the interface, and lower charge recombination. The intermediates formed during the photocatalytic degradation of DOX and CIP were analyzed using GC-MS/MS analysis, and the photodegradation pathway was elucidated. Also, the toxicity of the intermediates was computationally analyzed using ECOSAR software. The fabricated ZnO/NiCo2S4 QDs have excellent stability and reusability, confirmed by XRD and XPS analysis. The reusable efficiency of the NCs for the photocatalytic degradation of DOX and CIP were 98.93, and 99.4% respectively. Thus, the biologically fabricated NCs are shown to be an excellent photocatalyst and have wide applications in environmental remediation.
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Affiliation(s)
- M Swedha
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Mohammad K Okla
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Saud S Al-Amri
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ibrahim A Alaraidh
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Abdullah A Al-Ghamdi
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Asmaa Mohebaldin
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mostafa A Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mohammed Aufy
- Department of Pharmaceutical Sciences, Division of Pharmacology and Toxicology, University of Vienna, Austria
| | - Christian R Studenik
- Department of Pharmaceutical Sciences, Division of Pharmacology and Toxicology, University of Vienna, Austria
| | - Ajith M Thomas
- Department of Botany and Biotechnology, St Xavier's College, Thumba, Thiruvananthapuram, India
| | - Lija L Raju
- Department of Zoology, Mar Ivanios College, Nalanchira, Thiruvananthapuram, India
| | - S Sudheer Khan
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
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Ha Pham TT, Vu XH, Dien ND, Trang TT, Kim Chi TT, Phuong PH, Nghia NT. Ag nanoparticles on ZnO nanoplates as a hybrid SERS-active substrate for trace detection of methylene blue. RSC Adv 2022; 12:7850-7863. [PMID: 35424719 PMCID: PMC8982176 DOI: 10.1039/d2ra00620k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/03/2022] [Indexed: 12/13/2022] Open
Abstract
Decorating two-dimensional (2D) nanomaterials with nanoparticles provides an effective method to integrate their physicochemical properties. In this work, we present the hydrothermal growth process of 2D zinc oxide nanoplates (ZnO NPls), then silver nanoparticles (AgNPs) were uniformly distributed on the surface of ZnO NPls through the reduction procedure of silver nitrate with sodium borohydride to create a metal-semiconductor hybrid. The amount of AgNPs on the ZnO NPls' surface was carefully controlled by varying the volume of silver nitrate (AgNO3) solution. Moreover, the effect of AgNPs on the surface-enhanced Raman scattering (SERS) property of ZnO NPls was thoroughly investigated by using methylene blue (MB) as the target molecule. After calculation, the maximum enhancement factor value for 10-4 M of MB reached 6.2 × 106 for the peak at 1436 cm-1 and the limit of detection was 10-9 M. In addition, the hybrid nanosystem could distinguish MB with good reproducibility over a wide range of concentrations, from 10-9 to 10-4 M. The SERS mechanism is well elucidated based on the chemical and electromagnetic mechanisms related to the synergism of ZnO and Ag in the enhancement of Raman signal. Abundant hot spots located at the gap between adjacent separate Ag nanoparticles and ZnO nanoplates which formed a strong local electromagnetic field and electron transfer between ZnO and Ag are considered to be the key factors affecting the SERS performance of our prepared ZnO/Ag substrates. In this research, we found high sensitivity of ZnO nanoplates/Ag nanoparticles in detecting MB molecules. This unique metal-semiconductor hybrid nanosystem is advantageous for the formation of Raman signals and is thus suitable for the trace detection of methylene blue.
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Affiliation(s)
- Thi Thu Ha Pham
- Faculty of Chemistry, TNU-University of Sciences Tan Thinh ward Thai Nguyen city Vietnam
| | - Xuan Hoa Vu
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh ward Thai Nguyen city Vietnam
| | - Nguyen Dac Dien
- Faculty of Labour Protection, Vietnam Trade Union University 169 Tay Son street Hanoi city Vietnam
| | - Tran Thu Trang
- Institute of Science and Technology, TNU-University of Sciences Tan Thinh ward Thai Nguyen city Vietnam
| | - Tran Thi Kim Chi
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi 100000 Vietnam
| | - Pham Ha Phuong
- 31 Electro Mechanism and Explosive one Member Limited Liability Company Bai Bong ward Pho Yen Town Thai Nguyen Province Vietnam
| | - Nguyen Trong Nghia
- Center for Quantum and Electronics, Institute of Physics, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi 100000 Vietnam
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Localized Energy Band Bending in ZnO Nanorods Decorated with Au Nanoparticles. NANOMATERIALS 2021; 11:nano11102718. [PMID: 34685157 PMCID: PMC8539582 DOI: 10.3390/nano11102718] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/05/2021] [Accepted: 10/12/2021] [Indexed: 11/25/2022]
Abstract
Surface decoration by means of metal nanostructures is an effective way to locally modify the electronic properties of materials. The decoration of ZnO nanorods by means of Au nanoparticles was experimentally investigated and modelled in terms of energy band bending. ZnO nanorods were synthesized by chemical bath deposition. Decoration with Au nanoparticles was achieved by immersion in a colloidal solution obtained through the modified Turkevich method. The surface of ZnO nanorods was quantitatively investigated by Scanning Electron Microscopy, Transmission Electron Microscopy and Rutherford Backscattering Spectrometry. The Photoluminescence and Cathodoluminescence of bare and decorated ZnO nanorods were investigated, as well as the band bending through Mott–Schottky electrochemical analyses. Decoration with Au nanoparticles induced a 10 times reduction in free electrons below the surface of ZnO, together with a decrease in UV luminescence and an increase in visible-UV intensity ratio. The effect of decoration was modelled with a nano-Schottky junction at ZnO surface below the Au nanoparticle with a Multiphysics approach. An extensive electric field with a specific halo effect formed beneath the metal–semiconductor interface. ZnO nanorod decoration with Au nanoparticles was shown to be a versatile method to tailor the electronic properties at the semiconductor surface.
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Abstract
A heterogeneous photocatalyst amenable to catalyze different chemical reactions is a highly enabling and sustainable material for organic synthesis. Herein we report the synthesis and characterization of an azobenzene-based organic π–conjugated porous polymer (AzoCPP) as heterogeneous dual photocatalyst manifesting net-oxidative bromination of arenes and dehydroxylation of boronic acids to corresponding phenols. Hierarchical porosity and high surface area of the nano-sized AzoCPP allowed superior catalyst-substrate contact during catalyses, whereas the inherent structural defect present in the CPP backbone resulted in low-energy sinks functioning as de facto catalytic sites. A combination of these two structure-property aspects of AzoCPP, in addition to the dielectric constant manipulation of the system, led to excellent catalytic performance. The protocols remained valid for a wide substrate scope and the catalyst was recycled multiple times without substantial loss in catalytic activity. With the aid of subsequent control experiments and analytical characterizations, mechanisms for each catalysis are proposed and duly corroborated.
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Jumina, Kurniawan YS, Purwono B, Siswanta D, Priastomo Y, Winarno A, Waluyo J. Science and Technology Progress on the Desulfurization Process of Crude Oil. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jumina
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Yehezkiel Steven Kurniawan
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
- Ma Chung Research Center for Photosynthetic Pigments Universitas Ma Chung Villa Puncak Tidar N 01 Malang 65151 Indonesia
| | - Bambang Purwono
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Dwi Siswanta
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Yoga Priastomo
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Agustinus Winarno
- Department of Mechanical Engineering, Vocational College Universitas Gadjah Mada Sekip Utara Yogyakarta 55281 Indonesia
| | - Joko Waluyo
- Department of Mechanical and Industrial Engineering, Faculty of Engineering Universitas Gadjah Mada Jl. Grafika No 2 UGM Campus Yogyakarta 55281 Indonesia
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Choudhary S, Vashisht G, Malik R, Dong CL, Chen CL, Kandasami A, Annapoorni S. Photo generated charge transport studies of defects-induced shuttlecock-shaped ZnO/Ag hybrid nanostructures. NANOTECHNOLOGY 2021; 32:305708. [PMID: 33857921 DOI: 10.1088/1361-6528/abf87c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
We report the stimulating effects of interfacial charge transfer process between spherical Ag nanoparticles and shuttlecock-shaped ZnO nanostructures observed by UV-visible spectroscopy and x-ray absorption spectroscopy. In specific, ZnO nanorods and shuttlecock-shaped ZnO/Ag nanostructures were developed using a simple chemical colloidal method and characterized for structural variations using XRD. The observed red shift in plasmonic peak and the increase in Urbach energy signify interfacial interactions and increased randomness in the hybrid ZnO/Ag nanostructures. Simultaneously, the enhanced intensity of deep-level emission in the ZnO/Ag hybrid suggests the increased recombination rate of electron-hole pairs. The red and blue emissions evolving with temperature subsequently suggests the presence of oxygen vacancies or zinc interstitials in the system. The decrease in intensities and emerging features in O K-edge and Zn L-edge indicates the charge transfer from Ag to ZnO at the interface of ZnO/Ag hybrids. Moreover, the differences in absorption edges with alternating light on/off conditions were analyzed for the exploitation of this ZnO-based system in various applications.
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Affiliation(s)
- Siddharth Choudhary
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - Garima Vashisht
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - Rakesh Malik
- ARSD College, University of Delhi, Delhi 110021, India
| | - Chung-Li Dong
- Department of Physics, Tamkang University, Tamsui 25137, Taiwan
| | - Chi-Liang Chen
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Asokan Kandasami
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - S Annapoorni
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
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Abdul Wahab RA, Mohd Zaid MH, Aziz SHA, Amin Matori K, Fen YW, Yaakob Y. Effects of Sintering Temperature Variation on Synthesis of Glass-Ceramic Phosphor Using Rice Husk Ash as Silica Source. MATERIALS 2020; 13:ma13235413. [PMID: 33260692 PMCID: PMC7731033 DOI: 10.3390/ma13235413] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/21/2020] [Accepted: 11/25/2020] [Indexed: 12/25/2022]
Abstract
In this study, the authors attempted to propose the very first study on fabrication and characterization of zinc-boro-silicate (ZBS) glass-ceramics derived from the ternary zinc-boro-silicate (ZnO)0.65(B2O3)0.15(RHA)0.2 glass system through a conventional melt-quenching method by incorporating rice husk ash (RHA) as the silica (SiO2) source, followed by a sintering process. Optimization of sintering condition has densified the sintered samples while embedded beta willemite (β-Zn2SiO4) and alpha willemite (α-Zn2SiO4) were proven in X-ray diffraction (XRD) analysis. Field emission scanning electron microscopy (FESEM) has shown the distribution of willemite crystals in rhombohedral shape crystals and successfully form closely-packed grains due to intense crystallization. The photoluminescence (PL) spectra of all sintered ZBS glasses presented various emission peaks at 425, 463, 487, 531, and 643 nm corresponded to violet, blue, green, and red emission, respectively. The correlation between the densification, phase transformation, microstructure, and photoluminescence of Zn2SiO4 glass-ceramic phosphor is discussed in detail.
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Affiliation(s)
- Rabiatul Adawiyah Abdul Wahab
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (R.A.A.W.); (S.H.A.A.); (K.A.M.); (Y.W.F.); (Y.Y.)
- Faculty of Applied Sciences, Perak Branch Tapah Campus, Universiti Teknologi MARA, Tapah Road, Perak 35400, Malaysia
| | - Mohd Hafiz Mohd Zaid
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (R.A.A.W.); (S.H.A.A.); (K.A.M.); (Y.W.F.); (Y.Y.)
- Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Malaysia
- Correspondence:
| | - Sidek Hj. Ab Aziz
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (R.A.A.W.); (S.H.A.A.); (K.A.M.); (Y.W.F.); (Y.Y.)
| | - Khamirul Amin Matori
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (R.A.A.W.); (S.H.A.A.); (K.A.M.); (Y.W.F.); (Y.Y.)
- Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Yap Wing Fen
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (R.A.A.W.); (S.H.A.A.); (K.A.M.); (Y.W.F.); (Y.Y.)
| | - Yazid Yaakob
- Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (R.A.A.W.); (S.H.A.A.); (K.A.M.); (Y.W.F.); (Y.Y.)
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