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de Lourdes Ruiz Peralta M, Moreno-Hernandez JC, Rocha-Díaz CE, Camacho-García JH, Escobedo-Morales A, Salazar-Kuri U. Photocatalytic activity enhancement of two-step and one-pot synthesis of Pd/ZnO nanocomposites: an experimental and DFT study. Photochem Photobiol Sci 2024; 23:901-918. [PMID: 38584224 DOI: 10.1007/s43630-024-00562-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 03/08/2024] [Indexed: 04/09/2024]
Abstract
Pd/ZnO nanocomposites were successfully synthesized by means of one and two pot synthesis and applied in the photodegradation of Rh6G. The nanocomposites were characterized by XRD, SEM, TEM, FTIR and micro-Raman spectroscopies. It was found the presence of PdZn2, PdO and agglomerated particles in the support surface for the Palladium-based nanocomposites fabricated by one-pot route; the two-step method allowed the formation of spherical Pd nanoparticles, with homogeneous distribution in the nanocomposite matrix, with an average size of 2.16 nm. The results show higher photocatalytic efficiency for the samples fabricated under the two-step approach compared to the one-pot synthesis. Based on experimental results, density functional theory (DFT) calculations were carried out to understand the enhancement photocatalytic of Pd/ZnO nanocomposites. To achieve it, the ZnO (001) and (101) surfaces were built and decorated by different Pd coverages. The theoretical results indicated two different photocatalytic mechanisms. In ZnO (001) case, the electrons flowed from surface to Pd, generating the superoxide radical anion (⋅O2-). Furthermore, the density of states of the ZnO (001) surface was modified by impurity Pd-d states at proximity to the conduction states, which may work as electron acceptors states. On the other hand, we found that the electrons flow from Pd to ZnO (101) surface, inducing the formation of ⋅OH and ⋅O2- for the degradation of Rh6G. The density of states of the ZnO (101) revealed a reduction in its bandgap, due to Pd-d states localized above valence states. Hence, our theoretical results suggest that the Pd-d states may facilitate the mobility of electrons and holes in (001) and (101) surfaces, respectively, reducing the rate of charge recombination.
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Affiliation(s)
| | - J C Moreno-Hernandez
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, 72570, Puebla, Pue., Mexico
| | - C E Rocha-Díaz
- Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, Pue., Mexico
| | - J H Camacho-García
- Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, Pue., Mexico
| | - A Escobedo-Morales
- Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, Pue., Mexico
| | - U Salazar-Kuri
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, 72570, Puebla, Pue., Mexico
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2
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Sekar K, Doineau R, Mayarambakam S, Schmaltz B, Poulin-Vittrant G. Control of ZnO nanowires growth in flexible perovskite solar cells: A mini-review. Heliyon 2024; 10:e24706. [PMID: 38322830 PMCID: PMC10844130 DOI: 10.1016/j.heliyon.2024.e24706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/26/2023] [Accepted: 01/12/2024] [Indexed: 02/08/2024] Open
Abstract
Due to their excellent properties, Zinc oxide nanowires (ZnO NW) have been attractive and considered as a promising electron-transporting layer (ETL) in flexible Perovskite Solar Cells (FPSCs). Since the first report on ZnO NWs-based FPSCs giving 2.6 % power conversion efficiency (in 2013), great improvements have been made, allowing to reach up to∼15 % nowadays. However, some issues still need to be addressed, especially on flexible substrates, to achieve uniform and well-aligned ZnO NWs via low-cost chemical solution techniques. Several parameters, such as the growing method (time, temperature, precursors concentration), addition of seed layer (thickness, roughness, annealing temperature) and substrate (rigid or flexible), play a crucial role in ZnO NWs properties (i.e., length, diameter, density and aspect ratio). In this review, these parameters allowing to control the properties of ZnO NWs, like the growth techniques, utilization of seed layers and the growing method (time or precursors concentration) have been summarized. Then, a particular focus on the ZnO NW's role in FPSCs as well as the use of these results on the development of ZnO NWs-based FPSCs have been highlighted.
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Affiliation(s)
- Karthick Sekar
- GREMAN UMR 7347, Université de Tours, CNRS, INSA Centre Val de Loire, 37071 Tours, France
| | - Raphaël Doineau
- GREMAN UMR 7347, Université de Tours, CNRS, INSA Centre Val de Loire, 37071 Tours, France
| | | | - Bruno Schmaltz
- PCM2E EA 6299, Université de Tours, Parc de Grandmont, 37200 Tours, France
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3
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Indumathi T, Kumaresan I, Suriyaprakash J, Alarfaj AA, Hirad AH, Jaganathan R, Mathanmohun M. Synthesis and characterization of 4-nitro benzaldehyde with ZnO-based nanoparticles for biomedical applications. J Basic Microbiol 2024; 64:e2300494. [PMID: 37988661 DOI: 10.1002/jobm.202300494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/19/2023] [Accepted: 11/01/2023] [Indexed: 11/23/2023]
Abstract
Globally, cancer is the leading cause of death and morbidity, and skin cancer is the most common cancer diagnosis. Skin problems can be treated with nanoparticles (NPs), particularly with zinc oxide (ZnO) NPs, which have antioxidant, antibacterial, anti-inflammatory, and anticancer properties. An antibacterial activity of zinc oxide nanoparticles prepared in the presence of 4-nitrobenzaldehyde (4NB) was also tested in the present study. In addition, the influence of synthesized NPs on cell apoptosis, cell viability, mitochondrial membrane potential (MMP), endogenous reactive oxygen species (ROS) production, apoptosis, and cell adhesion was also examined. The synthesized 4-nitro benzaldehyde with ZnO (4NBZnO) NPs were confirmed via characterization techniques. 4NBZnO NPs showed superior antibacterial properties against the pathogens tested in antibacterial investigations. As a result of dose-based treatment with 4NBZnO NPs, cell viability, and MMP activity of melanoma cells (SK-MEL-3) cells were suppressed. A dose-dependent accumulation of ROS was observed in cells exposed to 4NBZnO NPs. As a result of exposure to 4NBZnO NPs in a dose-dependent manner, viable cells declined and apoptotic cells increased. This indicates that apoptotic cell death was higher. The cell adhesion test revealed that 4NBZnO NPs reduced cell adhesion and may promote apoptosis of cancer cells because of enhanced ROS levels.
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Affiliation(s)
- Thangavelu Indumathi
- Department of Chemistry, CHRIST (Deemed to be University), Bangalore, Karnataka, India
| | | | - Jagadeesh Suriyaprakash
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, China
| | - Abdullah A Alarfaj
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdurahman Hajinur Hirad
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ravindran Jaganathan
- Microbiology Unit, Preclinical Department, Faculty of Medicine, Universiti Kuala Lumpur, Royal College of Medicine Perak (UniKL-RCMP), Ipoh, Malaysia
| | - Maghimaa Mathanmohun
- Department of Microbiology, Muthayammal College of Arts and Science, Rasipuram, Namakkal, Tamilnadu, India
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4
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Abubakar S, Tan ST, Liew JYC, Talib ZA, Sivasubramanian R, Vaithilingam CA, Indira SS, Oh WC, Siburian R, Sagadevan S, Paiman S. Controlled Growth of Semiconducting ZnO Nanorods for Piezoelectric Energy Harvesting-Based Nanogenerators. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1025. [PMID: 36985919 PMCID: PMC10056750 DOI: 10.3390/nano13061025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
Zinc oxide (ZnO) nanorods have attracted considerable attention in recent years owing to their piezoelectric properties and potential applications in energy harvesting, sensing, and nanogenerators. Piezoelectric energy harvesting-based nanogenerators have emerged as promising new devices capable of converting mechanical energy into electric energy via nanoscale characterizations such as piezoresponse force microscopy (PFM). This technique was used to study the piezoresponse generated when an electric field was applied to the nanorods using a PFM probe. However, this work focuses on intensive studies that have been reported on the synthesis of ZnO nanostructures with controlled morphologies and their subsequent influence on piezoelectric nanogenerators. It is important to note that the diatomic nature of zinc oxide as a potential solid semiconductor and its electromechanical influence are the two main phenomena that drive the mechanism of any piezoelectric device. The results of our findings confirm that the performance of piezoelectric devices can be significantly improved by controlling the morphology and initial growth conditions of ZnO nanorods, particularly in terms of the magnitude of the piezoelectric coefficient factor (d33). Moreover, from this review, a proposed facile synthesis of ZnO nanorods, suitably produced to improve coupling and switchable polarization in piezoelectric devices, has been reported.
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Affiliation(s)
- Shamsu Abubakar
- Department of Physics, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Physics, Yobe State University, Damaturu P.M.B. 1144, Yobe State, Nigeria
| | - Sin Tee Tan
- Department of Physics, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | | | - Zainal Abidin Talib
- Department of Physics, College of Natural Science, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Republic of Korea
| | - Ramsundar Sivasubramanian
- Faculty of Innovation and Technology, Taylor’s University Malaysia, No. 1, Jalan Taylor’s, Subang Jaya 47500, Selangor, Malaysia
| | | | - Sridhar Sripadmanabhan Indira
- Faculty of Innovation and Technology, Taylor’s University Malaysia, No. 1, Jalan Taylor’s, Subang Jaya 47500, Selangor, Malaysia
| | - Won-Chun Oh
- Department of Advanced Materials Science and Engineering, Hanseo University, Seosan-si 356-706, Chungnam, Republic of Korea
| | - Rikson Siburian
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Padang Bulan, Medan 20155, Indonesia
| | - Suresh Sagadevan
- Nanotechnology & Catalysis Research Centre, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Suriati Paiman
- Department of Physics, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Functional Nanotechnology Devices Laboratory (FNDL), Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
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5
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Gouveia AF, Lemos SCS, Leite ER, Longo E, Andrés J. Back to the Basics: Probing the Role of Surfaces in the Experimentally Observed Morphological Evolution of ZnO. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:978. [PMID: 36985873 PMCID: PMC10057894 DOI: 10.3390/nano13060978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/27/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Although the physics and chemistry of materials are driven by exposed surfaces in the morphology, they are fleeting, making them inherently challenging to study experimentally. The rational design of their morphology and delivery in a synthesis process remains complex because of the numerous kinetic parameters that involve the effective shocks of atoms or clusters, which end up leading to the formation of different morphologies. Herein, we combined functional density theory calculations of the surface energies of ZnO and the Wulff construction to develop a simple computational model capable of predicting its available morphologies in an attempt to guide the search for images obtained by field-emission scanning electron microscopy (FE-SEM). The figures in this morphology map agree with the experimental FE-SEM images. The mechanism of this computational model is as follows: when the model is used, a reaction pathway is designed to find a given morphology and the ideal step height in the whole morphology map in the practical experiment. This concept article provides a practical tool to understand, at the atomic level, the routes for the morphological evolution observed in experiments as well as their correlation with changes in the properties of materials based solely on theoretical calculations. The findings presented herein not only explain the occurrence of changes during the synthesis (with targeted reaction characteristics that underpin an essential structure-function relationship) but also offer deep insights into how to enhance the efficiency of other metal-oxide-based materials via matching.
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Affiliation(s)
- Amanda F. Gouveia
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), 12071 Castelló, Spain
- Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, Campinas 13083-970, SP, Brazil
| | - Samantha C. S. Lemos
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), 12071 Castelló, Spain
| | - Edson R. Leite
- Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, Campinas 13083-970, SP, Brazil
| | - Elson Longo
- Center for the Development of Functional Materials (CDMF), Federal University of São Carlos, São Carlos 13565-905, SP, Brazil
| | - Juan Andrés
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), 12071 Castelló, Spain
- Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, Campinas 13083-970, SP, Brazil
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6
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Sharan S, Khare P, Shankar R, Tyagi A, Khare A. Development of 3D network of Zn-oxide nanorods assisted with PbO2/Pb electrode for electrochemical oxidation of methylene blue in aqueous phase. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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7
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Jegadeesan P, Sen S, Padmaprabu C, Srivastava S, Das A, Amirthapandian S. Morphological and optical investigations on Gd2O3 nanostructures. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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8
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Husk-like Zinc Oxide Nanoparticles Induce Apoptosis through ROS Generation in Epidermoid Carcinoma Cells: Effect of Incubation Period on Sol-Gel Synthesis and Anti-Cancerous Properties. Biomedicines 2023; 11:biomedicines11020320. [PMID: 36830857 PMCID: PMC9953567 DOI: 10.3390/biomedicines11020320] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023] Open
Abstract
This study effectively reports the influence of experimental incubation period on the sol-gel production of husk-like zinc oxide nanoparticles (ZNPs) and their anti-cancerous abilities. The surface morphology of ZNPs was studied with the help of SEM. With the use of TEM, the diameter range of the ZNPs was estimated to be ~86 and ~231 nm for ZNPA and ZNPB, prepared by incubating zinc oxide for 2 and 10 weeks, respectively. The X-ray diffraction (XRD) investigation showed that ZNPs had a pure wurtzite crystal structure. On prolonging the experimental incubation, a relative drop in aspect ratio was observed, displaying a distinct blue-shift in the UV-visible spectrum. Furthermore, RBC lysis assay results concluded that ZNPA and ZNPB both demonstrated innoxious nature. As indicated by MTT assay, reactive oxygen species (ROS) release, and chromatin condensation investigations against the human epidermoid carcinoma (HEC) A431 cells, ZNPB demonstrated viable relevance to chemotherapy. Compared to ZNPB, ZNPA had a slightly lower IC50 against A431 cells due to its small size. This study conclusively describes a simple, affordable method to produce ZNP nano-formulations that display significant cytotoxicity against the skin cancer cell line A431, suggesting that ZNPs may be useful in the treatment of cancer.
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9
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Al-Farsi L, Souier TM, Al-Hinai M, Myint MTZ, Kyaw HH, Widatallah HM, Al-Abri M. pH Controlled Nanostructure and Optical Properties of ZnO and Al-Doped ZnO Nanorod Arrays Grown by Microwave-Assisted Hydrothermal Method. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3735. [PMID: 36364511 PMCID: PMC9655615 DOI: 10.3390/nano12213735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/19/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The low-temperature microwave-assisted hydrothermal method was used to successfully grow pure and Al-doped ZnO (AZO) nanorod (NR) arrays on glass substrates. The combined effects of doping and pH on the structural properties, surface chemistry, and optical properties of all samples were investigated. Thermodynamic-based simulations of the growth solution were performed and a growth mechanism, that considers the effects of both the pH and Al-doping, is proposed, and discussed. Tuning the solution pH is key parameter to grow well-aligned, single crystal, highly packed, and high aspect ratio nanorod arrays. Moreover, the optical absorption in the visible range is enhanced by controlling the pH value. The PL spectra reveal a shift of the main radiative emission from the band-to-band into a transition involving deep defect levels of Zinc interstitial Zni. This shift is caused by an enhancement of the non-radiative components (phonon relaxation) at high pH values. The production of well-ordered ZnO and AZO nanorod arrays with visible-active absorption/emission centers would increase their potential use in various applications.
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Affiliation(s)
- Lamia Al-Farsi
- Department of Physics, College of Science, Sultan Qaboos University, Muscat P.O. Box 36, Oman
| | - Tewfik M. Souier
- Department of Physics, College of Science, Sultan Qaboos University, Muscat P.O. Box 36, Oman
| | - Muna Al-Hinai
- Department of Process Engineering, International Maritime College Oman, Sohar P.O. Box 532, Oman
| | - Myo T. Z. Myint
- Department of Physics, College of Science, Sultan Qaboos University, Muscat P.O. Box 36, Oman
| | - Htet H. Kyaw
- Nanotechnology Research Center, Sultan Qaboos University, Muscat P.O. Box 17, Oman
| | - Hisham M. Widatallah
- Department of Physics, College of Science, Sultan Qaboos University, Muscat P.O. Box 36, Oman
| | - Mohammed Al-Abri
- Nanotechnology Research Center, Sultan Qaboos University, Muscat P.O. Box 17, Oman
- Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat P.O. Box 33, Oman
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10
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Hoogendoorn B, Birdsong BK, Capezza AJ, Ström V, Li Y, Xiao X, Olsson RT. Ultra-low Concentration of Cellulose Nanofibers (CNFs) for Enhanced Nucleation and Yield of ZnO Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12480-12490. [PMID: 36200128 PMCID: PMC9583615 DOI: 10.1021/acs.langmuir.2c01713] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Cellulose nanofibers (CNFs) were used in aqueous synthesis protocols for zinc oxide (ZnO) to affect the formation of the ZnO particles. Different concentrations of CNFs were evaluated in two different synthesis protocols producing distinctly different ZnO morphologies (flowers and sea urchins) as either dominantly oxygen- or zinc-terminated particles. The CNF effects on the ZnO formation were investigated by implementing a heat-treatment method at 400 °C that fully removed the cellulose material without affecting the ZnO particles made in the presence of CNFs. The inorganic phase formations were monitored by extracting samples during the enforced precipitations to observe changes in the ZnO morphologies. A decrease in the size of the ZnO particles could be observed for all synthesis protocols, already occurring at small additions of CNFs. At as low as 0.1 g/L CNFs, the particle size decreased by 50% for the flower-shaped particles and 45% for the sea-urchin-shaped particles. The formation of smaller particles was accompanied by increased yield by 13 and 15% due to the CNFs' ability to enhance the nucleation, resulting in greater mass of ZnO divided among a larger number of particles. The enhanced nucleation could also be verified as useful for preventing secondary morphologies from forming, which grew on the firstly precipitated particles. The suppression of secondary growths' was due to the more rapid inorganic phase formation during the early phases of the reactions and the faster consumption of dissolved salts, leaving smaller amounts of metal salts present at later stages of the reactions. The findings show that using cellulose to guide inorganic nanoparticle growth can be predicted as an emerging field in the preparation of functional inorganic micro/nanoparticles. The observations are highly relevant in any industrial setting for the large-scale and resource-efficient production of ZnO.
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Affiliation(s)
- Billy
W. Hoogendoorn
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, Teknikringen 56, 114 28Stockholm, Sweden
| | - Björn K. Birdsong
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, Teknikringen 56, 114 28Stockholm, Sweden
| | - Antonio J. Capezza
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, Teknikringen 56, 114 28Stockholm, Sweden
| | - Valter Ström
- Department
of Material Science and Engineering, School of Industrial Engineering
and Management, KTH Royal Institute of Technology, Brinellvägen 23, SE-100 24Stockholm, Sweden
| | - Yuanyuan Li
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, Teknikringen 56, 114 28Stockholm, Sweden
| | - Xiong Xiao
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, Teknikringen 56, 114 28Stockholm, Sweden
| | - Richard T. Olsson
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, Teknikringen 56, 114 28Stockholm, Sweden
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11
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Suman S, Kushwaha AK. Densely packed Ga2O3 nanostructured film via pH-controlled crystal growth and memristive properties. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Sun J, Zhang Z, Li H, Yin H, Hao P, Dai X, Jiang K, Liu C, Zhang T, Yin J, Song Y, Zhou W, Gao J. Ultrasensitive SERS Analysis of Liquid and Gaseous Putrescine and Cadaverine by a 3D-Rosettelike Nanostructure-Decorated Flexible Porous Substrate. Anal Chem 2022; 94:5273-5283. [PMID: 35319200 DOI: 10.1021/acs.analchem.1c05013] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Putrescine and cadaverine are toxic biogenic amines in spoiled food, which poses a serious threat to food security. In this work, we reported a highly sensitive three-dimensional (3D)-rosettelike surface-enhanced Raman spectroscopy (SERS) substrate functionalized with a p-mercaptobenzoic acid (p-MBA) monolayer to detect liquid and gaseous putrescine and cadaverine in pork samples. The SERS substrate was made by a combination of the merit of the 3D morphology of ZnO nanorod arrays on a flexible porous poly(vinylidene fluoride) (PVDF) membrane and the in situ chemical growth of Au nanoparticle seeds on Au film-coated ZnO nanorods, which produced a 3D-rosettelike BigAuNP/Au/ZnO/P heterostructure with abundant SERS-active hot spots that significantly enhanced the localized surface plasmonic resonance (LSPR) effect and charge-transfer (CT) effect of Raman enhancement. This SERS substrate showed high sensitivity, reproducibility, stability, and uniformity. With the p-MBA molecular monolayer as the sensing interface, our SERS substrate realized the highly sensitive and quantitative detection of liquid putrescine and cadaverine within 10 min, with a limit of detection (LOD) of 3.2 × 10-16 and 1.6 × 10-13 M, respectively. Additionally, the sensor showed efficient SERS responses to gaseous amine molecules at low concentrations (putrescine: 1.26 × 10-9 M, cadaverine: 2.5 × 10-9 M). Further, the sensor was successfully applied to determine the total content of putrescine and cadaverine. Moreover, the practicability of this SERS sensor was verified by the measurement of liquid and gaseous amines in pork samples, and it showed great potential applications for sensitive detection of food spoilage.
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Affiliation(s)
- Jiaojiao Sun
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Zhiqiang Zhang
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China.,Changchun Guoke Biochemical Engineering Co., Ltd., Changchun 130000, China
| | - Haiwen Li
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Huancai Yin
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Peng Hao
- College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Xide Dai
- State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, China
| | - Keming Jiang
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Cong Liu
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Tao Zhang
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Jian Yin
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China.,Shandong Guoke Biochemical Engineering Co., Ltd., Jinan 250000, China
| | - Yizhi Song
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Wuping Zhou
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China.,Shandong Guoke Biochemical Engineering Co., Ltd., Jinan 250000, China
| | - Jing Gao
- College of Biomedical Engineering, University of Science and Technology of China, Hefei 230026, China.,CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
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Zhu X, Feng S, Rao Y, Ju S, Zhong Z, Xing W. A novel semi-dry method for rapidly synthesis ZnO nanorods on SiO2@PTFE nanofiber membrane for efficient air cleaning. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120206] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14
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Abdelmigid HM, Hussien NA, Alyamani AA, Morsi MM, AlSufyani NM, kadi HA. Green Synthesis of Zinc Oxide Nanoparticles Using Pomegranate Fruit Peel and Solid Coffee Grounds vs. Chemical Method of Synthesis, with Their Biocompatibility and Antibacterial Properties Investigation. Molecules 2022; 27:molecules27041236. [PMID: 35209025 PMCID: PMC8877600 DOI: 10.3390/molecules27041236] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/28/2022] [Accepted: 02/10/2022] [Indexed: 01/20/2023] Open
Abstract
This research aims to investigate the synthesis, characterization, and evaluation of the biocompatibility and antibacterial activity of novel zinc oxide (ZnO) nanoparticles (NPs) prepared by Punica granatum peel and coffee ground extracts as the reducing and capping agents. Chemically synthesized ZnONPs were prepared using zinc acetate dihydrate and sodium hydroxide as reducing precursors. ZnONPs were characterized using an ultraviolet-visible spectrophotometer (UV-VIS), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and Fourier transform infrared (FTIR) spectroscopy. Peaks of UV spectra were 300 nm for ZnONPs_PPE, 320 nm (ZnONPs_CE), 290 nm, and 440 nm (ZnONP_Chem), thereby confirming ZnONPs formation. The X-ray diffractograms revealed their hexagonal structure. TEM micrographs of the biosynthesized ZnONPs revealed their hexagonal pattern and nanorod shape for ZnONPs_Chem with particle sizes of 118.6 nm, 115.7 nm, and 111.2 nm, respectively. The FTIR analysis demonstrated the presence of proteins, carboxyl, and hydroxyl groups on ZnONPs surfaces that act as reducing and stabilizing agents. ZnONP_Chem shows the antibacterial effect on Staphylococcus aureus, Enterobacter aerogenes, Pseudomonas aeruginosa, and Klebsiella pneumoniae. Punica peel and coffee ground extracts are effective reducing agents for green ZnONPs synthesis with a lower cytotoxic effect on Vero cells than ZnONPs_Chem with IC50 = 111, 103, and 93 μg/mL, respectively.
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Affiliation(s)
- Hala M. Abdelmigid
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (H.M.A.); (A.A.A.); (H.A.k.)
| | - Nahed Ahmed Hussien
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (M.M.M.); (N.M.A.)
- Correspondence:
| | - Amal Ahmed Alyamani
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (H.M.A.); (A.A.A.); (H.A.k.)
| | - Maissa M. Morsi
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (M.M.M.); (N.M.A.)
| | - Noha Moslah AlSufyani
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (M.M.M.); (N.M.A.)
| | - Hanan Abdulaziz kadi
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (H.M.A.); (A.A.A.); (H.A.k.)
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15
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Ikram M, Abid N, Haider A, Ul-Hamid A, Haider J, Shahzadi A, Nabgan W, Goumri-Said S, Butt AR, Benali Kanoun M. Toward efficient dye degradation and the bactericidal behavior of Mo-doped La 2O 3 nanostructures. NANOSCALE ADVANCES 2022; 4:926-942. [PMID: 36131827 PMCID: PMC9418635 DOI: 10.1039/d1na00802a] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/28/2021] [Indexed: 05/15/2023]
Abstract
In this study, different concentrations (0, 0.02, 0.04, and 0.06 wt%) of Mo doped onto La2O3 nanostructures were synthesized using a one-pot co-precipitation process. The aim was to study the ability of Mo-doped La2O3 samples to degrade toxic methylene blue dye in different pH media. The bactericidal potential of synthesized samples was also investigated. The structural properties of prepared samples were examined by XRD. The observed XRD spectrum of La2O3 showed a cubic and hexagonal structure, while no change was recorded in Mo-doped La2O3 samples. Doping with Mo improved the crystallinity of the samples. UV-Vis spectrophotometry and density functional theory calculations were used to assess the optical characteristics of Mo-La2O3. The band gap energy was reduced while the absorption spectra showed prominent peaks due to Mo doping. The HR-TEM results revealed the rod-like morphology of La2O3. The rod-like network appeared to become dense upon doping. A significant degradation of MB was confirmed with Mo; furthermore, the bactericidal activities against S. aureus and E. coli were measured as 5.05 mm and 5.45 mm inhibition zones, respectively, after doping with a high concentration (6%) of Mo.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Application Research Lab, Department of Physics, Government College University Lahore Lahore 54000 Punjab Pakistan
| | - Namra Abid
- Physics Department, Lahore Garrison University Lahore 54000 Punjab Pakistan
| | - Ali Haider
- Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture 66000 Multan Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences Tianjin 300308 China
| | - Anum Shahzadi
- Faculty of Pharmacy, University of the Lahore Lahore Pakistan
| | - Walid Nabgan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia
| | - Souraya Goumri-Said
- College of Science, Physics Department, Alfaisal University P.O. Box 50927 Riyadh 11533 Saudi Arabia
| | - Alvina Rafiq Butt
- Physics Department, Lahore Garrison University Lahore 54000 Punjab Pakistan
| | - Mohammed Benali Kanoun
- Department of Physics, College of Science, King Faisal University P.O. Box 400 Al-Ahsa 31982 Saudi Arabia
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16
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Cho SI, Choi B, Lee BC, Cho Y, Han YS. Enhancement in Photovoltaic Performance of Solar Cells by Electrostatic Adsorption of Dyes on ZnO Nanorods. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:372. [PMID: 35159717 PMCID: PMC8838287 DOI: 10.3390/nano12030372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/17/2022] [Accepted: 01/21/2022] [Indexed: 01/16/2023]
Abstract
ZnO nanorods were formed by chemical bath deposition on fluorine-doped tin oxide (FTO) glass and the photovoltaic performance of ZnO-based dye-sensitized solar cells (DSCs) was investigated. A DSC with 8 h-grown ZnO nanorods showed a higher power conversion efficiency (PCE) than devices with 4, 6, and 10 h-grown ones. Further improvement in PCE was achieved in a cell with a silver-ion-deposited ZnO/FTO electrode. By deposition of Ag+ on the surface of the 8 h-grown ZnO nanorods, the dye-loading amount increased by approximately 210%, compared to that of pristine ZnO nanorods, resulting in a 1.8-times higher PCE. A DSC with the pristine ZnO/FTO electrode showed a PCE of 0.629%, while in a device with the silver-ion-deposited ZnO/FTO, the PCE increased to 1.138%. In addition, interfacial resistance at the ZnO/dye/electrolyte was reduced to approximately 170 Ω from 460 Ω for the control cell with the pristine ZnO/FTO. We attributed the higher dye-loading amount in the silver-ion-deposited ZnO/FTO to the electrostatic attraction between the positively charged ZnO and carboxylate anions (-COO-) of the N719 dyes.
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Affiliation(s)
- Seong Il Cho
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea; (S.I.C.); (B.C.); (B.C.L.)
| | - Baekseo Choi
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea; (S.I.C.); (B.C.); (B.C.L.)
| | - Byeong Chul Lee
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea; (S.I.C.); (B.C.); (B.C.L.)
| | - Yunsung Cho
- School of Electronic and Electrical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea;
| | - Yoon Soo Han
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongbuk 38430, Korea; (S.I.C.); (B.C.); (B.C.L.)
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17
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Ling OP, Ardani MR, Baharun N, Aziz A, Rezan SA. Synthesis of multi-hollow flake like ZnO nanostructures via facile hydrothermal technique. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2021.2025083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- O. P. Ling
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
| | - M. R. Ardani
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
| | - N. Baharun
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
| | - A. Aziz
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
| | - S. A. Rezan
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
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18
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Xing M, Wang L, Wang R. A Review on the Effects of ZnO Nanowire Morphology on the Performance of Interpenetrating Bulk Heterojunction Quantum Dot Solar Cells. NANOMATERIALS 2021; 12:nano12010114. [PMID: 35010064 PMCID: PMC8746555 DOI: 10.3390/nano12010114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/24/2021] [Accepted: 12/27/2021] [Indexed: 12/04/2022]
Abstract
Interpenetrating bulk heterojunction (IBHJ) quantum dot solar cells (QDSCs) offer a direct pathway for electrical contacts to overcome the trade-off between light absorption and carrier extraction. However, their complex three-dimensional structure creates higher requirements for the optimization of their design due to their more difficult interface defect states control, more complex light capture mechanism, and more advanced QD deposition technology. ZnO nanowire (NW) has been widely used as the electron transport layer (ETL) for this structure. Hence, the optimization of the ZnO NW morphology (such as density, length, and surface defects) is the key to improving the photoelectric performance of these SCs. In this study, the morphology control principles of ZnO NW for different synthetic methods are discussed. Furthermore, the effects of the density and length of the NW on the collection of photocarriers and their light capture effects are investigated. It is indicated that the NW spacing determines the transverse collection of electrons, while the length of the NW and the thickness of the SC often affect the longitudinal collection of holes. Finally, the optimization strategies for the geometrical morphology of and defect passivation in ZnO NWs are proposed to improve the efficiency of IBHJ QDSCs.
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Affiliation(s)
| | | | - Ruixiang Wang
- Correspondence: ; Tel.: +86-29-82668738; Fax: +86-29-82668725
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19
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Choi J, Jin DK, Jeong J, Kang BK, Yang WS, Ali A, Yoo J, Kim MJ, Yi GC, Hong YJ. Facet-selective morphology-controlled remote epitaxy of ZnO microcrystals via wet chemical synthesis. Sci Rep 2021; 11:22697. [PMID: 34811457 PMCID: PMC8608950 DOI: 10.1038/s41598-021-02222-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 11/11/2021] [Indexed: 11/09/2022] Open
Abstract
We report on morphology-controlled remote epitaxy via hydrothermal growth of ZnO micro- and nanostructure crystals on graphene-coated GaN substrate. The morphology control is achieved to grow diverse morphologies of ZnO from nanowire to microdisk by changing additives of wet chemical solution at a fixed nutrient concentration. Although the growth of ZnO is carried out on poly-domain graphene-coated GaN substrate, the direction of hexagonal sidewall facet of ZnO is homogeneous over the whole ZnO-grown area on graphene/GaN because of strong remote epitaxial relation between ZnO and GaN across graphene. Atomic-resolution transmission electron microscopy corroborates the remote epitaxial relation. The non-covalent interface is applied to mechanically lift off the overlayer of ZnO crystals via a thermal release tape. The mechanism of facet-selective morphology control of ZnO is discussed in terms of electrostatic interaction between nutrient solution and facet surface passivated with functional groups derived from the chemical additives.
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Affiliation(s)
- Joonghoon Choi
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea
- GRI-TPC International Research Center, Sejong University, Seoul, 05006, Republic of Korea
| | - Dae Kwon Jin
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea
- GRI-TPC International Research Center, Sejong University, Seoul, 05006, Republic of Korea
| | - Junseok Jeong
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea
- GRI-TPC International Research Center, Sejong University, Seoul, 05006, Republic of Korea
| | - Bong Kyun Kang
- Nano Materials Research Center, Korea Electronics Technology Institute (KETI), Seongnam, Gyeonggi-do, 13509, Republic of Korea
- Department of Electronic Materials and Devices Engineering, Department of Display Materials Engineering, Soonchunhyang University, Asan, Chungnam, 31538, Republic of Korea
| | - Woo Seok Yang
- Nano Materials Research Center, Korea Electronics Technology Institute (KETI), Seongnam, Gyeonggi-do, 13509, Republic of Korea
| | - Asad Ali
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul, 151-747, Republic of Korea
| | - Jinkyoung Yoo
- Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Moon J Kim
- Department of Materials Science & Engineering, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Gyu-Chul Yi
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul, 151-747, Republic of Korea
| | - Young Joon Hong
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea.
- GRI-TPC International Research Center, Sejong University, Seoul, 05006, Republic of Korea.
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20
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Ramany K, Shankararajan R, Savarimuthu K, Venkatachalapathi S, Gunasekaran I, Rajamanickam G, Perumalsamy R. Experimental investigation of performance tailoring of the multifunctional sensor using transition metal (Fe) doped ZnO nanorods synthesized via a facile solution-based method. NANOTECHNOLOGY 2021; 33:035713. [PMID: 34624882 DOI: 10.1088/1361-6528/ac2e25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
A systematic interpretation of the undoped and Fe doped ZnO based multifunctional sensor developed employing economic and facile low-temperature hydrothermal method is reported. The tailoring of the performance improvement of the sensor was deliberately carried out using varied concentration (1, 3 and 5 Wt%) of Fe dopant in ZnO nanorods. The structural and morphological analysis reveal the undisturbed ZnO hexagonal wurtzite structure formation and 1D morphology grown even when the dopant is added. The optical property study evidences a decreased bandgap (3.10 eV) and decreased defects of 5 Wt% of Fe dopant in ZnO nanorods based sensor compared to the undoped one. The electrical process transpiring in the tailored multifunctional sensor is investigated using photoconductivity and impedance analysis elucidates proper construction of p-n junction between the piezoelectric n-type active layer (undoped and Fe doped ZnO nanorods) and p-type PEDOT:PSS ((poly(3,4-ethylene dioxythiophene) polystyrene sulfonate)) and reduced internal resistance of 5 Wt% of Fe dopant in ZnO nanorods based sensor (131.97 Ω) respectively. The investigation on the experimental piezoelectric acceleration and gas sensing validation and the performance measurement were interpreted using test systems. A revamped output voltage of 3.71 V for 1 g input acceleration and a comprehensive sensitivity of 7.17 V g-1was achieved for the 5 Wt% of Fe dopant in ZnO nanorods based sensor sensor. Similarly, an upgraded sensitivity of 2.04 and 6.75 for 5 Wt% of Fe dopant in ZnO nanorods based sensor was obtained when exposed to 10 ppm of target gases namely CO and CH4respectively at room temperature. Appending to this, acceptable stability of the sensor for both the sensing (acceleration and gas) was also attained manifesting its prospective application in multifunctional based systems like sewage systems.
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Affiliation(s)
- Kiruthika Ramany
- Electronics and Communication Engineering Department, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
| | - Radha Shankararajan
- Electronics and Communication Engineering Department, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
| | - Kirubaveni Savarimuthu
- Electronics and Communication Engineering Department, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
| | - Shyamala Venkatachalapathi
- Electronics and Communication Engineering Department, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
| | - Iyappan Gunasekaran
- Department of Physics, Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
| | - Govindaraj Rajamanickam
- Department of Physics, Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
| | - Ramasamy Perumalsamy
- Department of Physics, Research Centre, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, India
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21
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Qin L, Mawignon FJ, Hussain M, Ange NK, Lu S, Hafezi M, Dong G. Economic Friendly ZnO-Based UV Sensors Using Hydrothermal Growth: A Review. MATERIALS (BASEL, SWITZERLAND) 2021; 14:4083. [PMID: 34361276 PMCID: PMC8347016 DOI: 10.3390/ma14154083] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/08/2021] [Accepted: 07/19/2021] [Indexed: 01/09/2023]
Abstract
Ultraviolet (UV) sensors offer significant advantages in human health protection and environmental pollution monitoring. Amongst various materials for UV sensors, the zinc oxide (ZnO) nanostructure is considered as one of the most promising candidates due to its incredible electrical, optical, biomedical, energetic and preparing properties. Compared to other fabricating techniques, hydrothermal synthesis has been proven to show special advantages such as economic cost, low-temperature process and excellent and high-yield production. Here, we summarize the latest progress in research about the hydrothermal synthesis of ZnO nanostructures for UV sensing. We particularly focus on the selective hydrothermal processes and reveal the effect of key factors/parameters on ZnO architectures, such as the laser power source, temperature, growth time, precursor, seeding solution and bases. Furthermore, ZnO hydrothermal nanostructures for UV applications as well as their mechanisms are also summarized. This review will therefore enlighten future ideas of low-temperature and low-cost ZnO-based UV sensors.
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Affiliation(s)
- Liguo Qin
- Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Institute of Design Science and Basic Components, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (F.J.M.); (M.H.); (N.K.A.); (S.L.); (M.H.); (G.D.)
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22
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Dhandapani P, AlSalhi MS, Karthick R, Chen F, Devanesan S, Kim W, Rajasekar A, Ahmed M, Aljaafreh MJ, Muhammad A. Biological mediated synthesis of RGO-ZnO composites with enhanced photocatalytic and antibacterial activity. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124661. [PMID: 33288337 DOI: 10.1016/j.jhazmat.2020.124661] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/07/2020] [Accepted: 11/20/2020] [Indexed: 05/22/2023]
Abstract
In this study, we reported the biological approach to synthesis of ZnO nanorod (NR) on the reduced graphene oxide (RGO) for photocatalytic, antibacterial activity and hydrogen production under sunlight. Bacillus subtilis played a vital role in the production of biogenic ammonia from synthetic urine and utilized for the synthesis of ZnONR on the RGO sheet. The morphological study revealed that RGO sheets displayed a tremendous role in anchoring ZnONR. XRD patterns showed the ZnO crystal phase on the RGO sheets. XPS and Raman spectra confirmed that the bio-hydrothermal method as suitable for GO converted into RGO. The transient photocurrent and I/V measurement are exhibited as an increment on the RGO-ZnONR compared to ZnONR. The RGO-ZnONR composites showed excellent performance with decolorization of MB and textile dyes and efficient control of the E. coli and S. aureus. RGO-ZnONR exhibited remarkable noted as a higher photocatalytic hydrogen evolution rate (940 μmol/h/gcat) than the ZnONR (369.5 μmol/h/g cat). As a result of photocatalytic performance to correlate with sunlight intensity was extensively studied. RGO plays an essential role in interface electron transfer from sunlight to ZnONR for enhancing •OH radical formation to cleavage of dye color substance and eradicated bacterial cells.
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Affiliation(s)
- Perumal Dhandapani
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore 632115, Tamilnadu, India
| | - Mohamad S AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Ramalingam Karthick
- Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006. PR China
| | - Fuming Chen
- Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006. PR China
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, South Korea
| | - Aruliah Rajasekar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore 632115, Tamilnadu, India.
| | - Mukhtar Ahmed
- Department of Zoology, Central Laboratory, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Mamduh J Aljaafreh
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Atif Muhammad
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
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23
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T.K S, Naskar K. Zinc oxide with various surface characteristics and its role on mechanical properties, cure-characteristics, and morphological analysis of natural rubber/carbon black composites. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02536-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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24
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van Rijt MMJ, Oosterlaken BM, Friedrich H, de With G. Controlled titration-based ZnO formation. CrystEngComm 2021; 23:3340-3348. [PMID: 34093087 PMCID: PMC8107948 DOI: 10.1039/d1ce00222h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 03/22/2021] [Indexed: 11/21/2022]
Abstract
Hexamethylenetetramine (HMTA) is commonly used as a base releasing agent for the synthesis of ZnO under mild aqueous conditions. HMTA hydrolysis leads to gradual formation of a base during the reaction. Use of HMTA, however, does have limitations: HMTA hydrolysis yields both formaldehyde and ammonia, it provides no direct control over the ammonia addition rate or the total amount of ammonia added during the reaction, it results in a limited applicable pH range and it dictates the accessible reaction temperatures. To overcome these restrictions, this work presents a direct base titration strategy for ZnO synthesis in which a continuous base addition rate is maintained. Using this highly flexible strategy, wurtzite ZnO can be synthesized at a pH >5.5 using either KOH or ammonia as a base source at various addition rates and reaction pH values. In situ pH measurements suggest a similar reaction mechanism to HMTA-based synthesis, independent of the varied conditions. The type and concentration of the base used for titration affect the reaction product, with ammonia showing evidence of capping behaviour. Optimizing this strategy, we are able to influence and direct the crystal shape and significantly increase the product yield to 74% compared to the ∼13% obtained by the reference HMTA reaction.
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Affiliation(s)
- Mark M J van Rijt
- Laboratory of Physical Chemistry, Centre for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology P. O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Bernette M Oosterlaken
- Laboratory of Physical Chemistry, Centre for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology P. O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Heiner Friedrich
- Laboratory of Physical Chemistry, Centre for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology P. O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Gijsbertus de With
- Laboratory of Physical Chemistry, Centre for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology P. O. Box 513 Eindhoven 5600 MB The Netherlands
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25
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Chalangar E, Nur O, Willander M, Gustafsson A, Pettersson H. Synthesis of Vertically Aligned ZnO Nanorods Using Sol-gel Seeding and Colloidal Lithography Patterning. NANOSCALE RESEARCH LETTERS 2021; 16:46. [PMID: 33709294 PMCID: PMC7952483 DOI: 10.1186/s11671-021-03500-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/21/2021] [Indexed: 05/24/2023]
Abstract
Different ZnO nanostructures can be grown using low-cost chemical bath deposition. Although this technique is cost-efficient and flexible, the final structures are usually randomly oriented and hardly controllable in terms of homogeneity and surface density. In this work, we use colloidal lithography to pattern (100) silicon substrates to fully control the nanorods' morphology and density. Moreover, a sol-gel prepared ZnO seed layer was employed to compensate for the lattice mismatch between the silicon substrate and ZnO nanorods. The results show a successful growth of vertically aligned ZnO nanorods with controllable diameter and density in the designated openings in the patterned resist mask deposited on the seed layer. Our method can be used to fabricate optimized devices where vertically ordered ZnO nanorods of high crystalline quality are crucial for the device performance.
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Affiliation(s)
- Ebrahim Chalangar
- Department of Science and Technology, Physics, Electronics and Mathematics, Linköping University, Norrköping, Sweden
- School of Information Technology, Halmstad University, 301 18, Halmstad, Sweden
| | - Omer Nur
- Department of Science and Technology, Physics, Electronics and Mathematics, Linköping University, Norrköping, Sweden
| | - Magnus Willander
- Department of Science and Technology, Physics, Electronics and Mathematics, Linköping University, Norrköping, Sweden
| | - Anders Gustafsson
- Solid State Physics and NanoLund, Lund University, Box 118, 221 00, Lund, Sweden
| | - Håkan Pettersson
- Department of Science and Technology, Physics, Electronics and Mathematics, Linköping University, Norrköping, Sweden.
- School of Information Technology, Halmstad University, 301 18, Halmstad, Sweden.
- Solid State Physics and NanoLund, Lund University, Box 118, 221 00, Lund, Sweden.
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26
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Abdulrahman AF, Ahmed SM, Barzinjy AA, Hamad SM, Ahmed NM, Almessiere MA. Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods. NANOMATERIALS 2021; 11:nano11030677. [PMID: 33803274 PMCID: PMC7999724 DOI: 10.3390/nano11030677] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/22/2021] [Accepted: 03/04/2021] [Indexed: 01/31/2023]
Abstract
Ultraviolet (UV) photodetectors (PDs) based on high-quality well-aligned ZnO nanorods (NRs) were fabricated using both modified and conventional chemical bath deposition (CBD) methods. The modified chemical bath deposition (M-CBD) method was made by adding air bubbles to the growth solution during the CBD process. The viability and effectiveness of M-CBD were examined by developing UV PDs based on ZnO NRs. The ZnO nano-seed layer was coated on a glass substrate utilizing radiofrequency (RF) sputtering. The impact of the different growth-times on morphology, growth rate, crystal structure, and optical and chemical properties were investigated systematically using different characterization techniques, such as field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) analysis, UV–VIS double beam spectrometer, and energy dispersive X-ray analysis (EDX), respectively. The Al/ZnO UV PDs based on ZnO nanorods were fabricated with optimum growth conditions through the two methods of preparation. This study showed that the synthesized ZnO NRs using the M-CBD method for different growth times possess better properties than the conventional method under similar deposition conditions. Despite having the highest aspect ratio and growth rate of ZnO NRs, which were found at 4 h growth duration for both methods, the aspect ratio of ZnO NRs using the M-CBD technique was comparatively higher than the conventional CBD method. Besides, the UV PDs fabricated by the M-CBD method at 5 V bias voltage showed high sensitivity, short response time, quick recovery time, high gain, low dark current, and high photocurrent compared with the UV PD device fabricated by the conventional CBD method.
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Affiliation(s)
- Ahmed Fattah Abdulrahman
- Department of Physics, Faculty of Science, University of Zakho, Zakho 42002, Kurdistan Region, Iraq;
| | - Sabah Mohammed Ahmed
- Department of Physics, College of Science, University of Duhok, Duhok 42001, Kurdistan Region, Iraq;
| | - Azeez Abdullah Barzinjy
- Department of Physics, College of Education, Salahaddin University-Erbil, Erbil 44001, Kurdistan Region, Iraq
- Physics Education Department, Faculty of Education, Tishk International University, Erbil 44001, Kurdistan Region, Iraq
- Correspondence: ; Tel.: +964-750-454-2010
| | - Samir Mustafa Hamad
- Scientific Research Centre, Soran University, Soran 44008, Kurdistan Region, Iraq;
| | | | - Munirah Abullah Almessiere
- Department of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia;
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27
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Mukherjee S, Pramanik S, Das S, Chakraborty S, Mondal S, Ghosh T, Nath R, Kuiri PK. Oriented attachment induced morphology modulation of ZnO nanoparticles at low temperature using KOH as a morphology controller. NEW J CHEM 2021. [DOI: 10.1039/d1nj02248b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Oriented attachment induced shape transition of ZnO nanoparticles from nanosphere to nanorod. The shape of the nanoparticles is controlled by the concentration of KOH.
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Affiliation(s)
- Sumit Mukherjee
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Subhamay Pramanik
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Sandip Das
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Subhabrata Chakraborty
- Indian Institute of Engineering Science and Technology, Howrah, 711103, West Bengal, India
| | - Shyamal Mondal
- Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
- Fondazione Bruno Kessler, Center for Materials and Microsystems-Micro Nano Facility, Via Sommarive 18, 38123 Trento, Italy
| | - Tatan Ghosh
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
- Department of Physics, Balarampur College, P.O - Rangadih, Purulia, 723143, West Bengal, India
| | - Rajib Nath
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
| | - Probodh K. Kuiri
- Department of Physics, Sidho-Kanho-Birsha University, Ranchi Road, Purulia, 723104, West Bengal, India
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28
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Yuan J, Li P, Yuan R, Mao D. Fabrication and Corrosion Resistance of a Superhydrophobic Ni-P/Ni 3(NO 3) 2(OH) 4 Multilayer Protective Coating on Magnesium Alloy. ACS OMEGA 2020; 5:24247-24255. [PMID: 33015441 PMCID: PMC7528178 DOI: 10.1021/acsomega.0c02196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
A superhydrophobic multilayer coating with excellent corrosion resistance has been fabricated on an AZ61 magnesium alloy through electroless plating and hydrothermal treatment. The surface morphologies, chemical characteristics, wettabilities, and corrosion resistance of the multilayer coating were characterized and discussed. The results show that the electroless Ni-P coating on the magnesium alloy exhibits a nodular structure with micropores and lower corrosion resistance. However, a dense Ni3(NO3)2(OH)4 layer, a porous Ni3(NO3)2(OH)4 nanostructure layer, and a stearic absorbing layer are grown on the surface of the Ni-P coating with superhydrophobic characters and higher corrosion resistance after hydrothermal treatment. Furthermore, the water contact angle and corrosion resistance of the multilayer coating showed a trend of first increasing and then decreasing as the hydrothermal reaction time increases. The optimum hydrothermal reaction time is 15 h, and the multilayer coating prepared under this condition has the highest corrosion resistance and the highest contact angle. In addition, the protection mechanism of the multilayer coating is discussed, and the formation of the dense Ni3(NO3)2(OH)4 layer and the stearic absorbing layer effectively improved the corrosion resistance of the multilayer coating.
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Affiliation(s)
- Jing Yuan
- College of Physics Electronic Information Engineering, Qinghai University for Nationalities, Xining, Qinghai 810007, P R China
| | - Pei Li
- Department of Orthopedic, Qinghai Provincial People's Hospital, Xining, Qinghai 810007, P R China
| | - Rui Yuan
- College of Chemical Engineering, Qinghai University, Xining, Qinghai 810016, P R China
| | - Duolu Mao
- College of Physics Electronic Information Engineering, Qinghai University for Nationalities, Xining, Qinghai 810007, P R China
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29
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Mosalagae K, Murape DM, Lepodise LM. Effects of growth conditions on properties of CBD synthesized ZnO nanorods grown on ultrasonic spray pyrolysis deposited ZnO seed layers. Heliyon 2020; 6:e04458. [PMID: 32715133 PMCID: PMC7369615 DOI: 10.1016/j.heliyon.2020.e04458] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 06/24/2020] [Accepted: 07/10/2020] [Indexed: 11/25/2022] Open
Abstract
ZnO nanorods were synthesized on a seed layer coated glass substrate using chemical bath deposition (CBD). Prior to growth, a seed layer had been prepared via ultrasonic spray pyrolysis method. The aim was to explore the influence of varying the chemical bath deposition conditions namely: growth time, bath temperature and concentration levels of the precursor on the orientation, structural, optical and vibrational properties of the subsequently grown nanorods. The presence of ZnO nanorods resembling the hexagonal-wurtzite structure having preference of orientation along the c-axis and varying crystallinity under different growth parameters was confirmed by X-ray diffraction (XRD). Scanning Electron Microscopy (SEM) acquired images of uniformly arranged and vertically oriented ZnO nanorods grown at a relatively higher bath temperature of 90 °C and shorter growth period of 2 h. UV/Vis/NIR spectrophotometer measurements revealed an optical transmittance of between 50 – 70 % for the nanorods. Raman spectroscopy results confirmed the presence of Raman active E2(low) and E2(high) modes corresponding to 98 cm−1 and 478 cm−1 belonging to the hexagonal ZnO phase. This work shows that the orientation, structural, optical and vibrational properties of the grown nanorod structures are controlled via alteration of the growth parameters.
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Affiliation(s)
- K Mosalagae
- Botswana International University of Science and Technology, Private Bag 16, Palapye, Botswana
| | - D M Murape
- Botswana International University of Science and Technology, Private Bag 16, Palapye, Botswana
| | - L M Lepodise
- Botswana International University of Science and Technology, Private Bag 16, Palapye, Botswana
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30
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Geng Y, Jeronimo K, Bin Che Mahzan MA, Lomax P, Mastropaolo E, Cheung R. Comparison of ZnO nanowires grown on e-beam evaporated Ag and ZnO seed layers. NANOSCALE ADVANCES 2020; 2:2814-2823. [PMID: 36132407 PMCID: PMC9418495 DOI: 10.1039/c9na00553f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 05/18/2020] [Indexed: 05/17/2023]
Abstract
In this study, ZnO nanowires with diameters ranging from 50 nm to 500 nm have been synthesized hydrothermally on Ag and ZnO seed layers deposited by electron beam evaporation. ZnO nanowires grown on hetero and homo interfaces have been studied by comparing the growth characteristics of (a) ZnO nanowires on the Ag seed layer and (b) ZnO nanowires grown on the ZnO seed layer, respectively. The surface morphology of the as-evaporated seed layers before the nanowire growth has been investigated. Electron backscatter diffraction (EBSD) has been employed to examine the crystallinity of ZnO nanowires. In addition, the integrity of the Ag-ZnO heterointerface has been investigated using high-resolution transmission electron microscopy (HR-TEM). The length, diameter, density, and alignment of nanowires grown on Ag and ZnO seed layers have been studied as a function of growth time from 0.5 hours to 18 hours and precursor concentration from 5 mM to 18 mM. Furthermore, for both the Ag-ZnO nanowire heterostructure and ZnO-ZnO nanowire homostructure, the role of defects in the optical properties in the wavelength range of 517 nm to 900 nm has been studied using photoluminescence (PL) spectroscopy.
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Affiliation(s)
- Yulin Geng
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Scottish Microelectronics Centre Alexander Crum Brown Road Edinburgh EH9 3FF Scotland UK
| | - Karina Jeronimo
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Scottish Microelectronics Centre Alexander Crum Brown Road Edinburgh EH9 3FF Scotland UK
| | - Muhammad Ammar Bin Che Mahzan
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Scottish Microelectronics Centre Alexander Crum Brown Road Edinburgh EH9 3FF Scotland UK
| | - Peter Lomax
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Scottish Microelectronics Centre Alexander Crum Brown Road Edinburgh EH9 3FF Scotland UK
| | - Enrico Mastropaolo
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Scottish Microelectronics Centre Alexander Crum Brown Road Edinburgh EH9 3FF Scotland UK
| | - Rebecca Cheung
- Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh, Scottish Microelectronics Centre Alexander Crum Brown Road Edinburgh EH9 3FF Scotland UK
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31
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Pagano R, Ingrosso C, Giancane G, Valli L, Bettini S. Wet Synthesis of Elongated Hexagonal ZnO Microstructures for Applications as Photo-Piezoelectric Catalysts. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2938. [PMID: 32630074 PMCID: PMC7372467 DOI: 10.3390/ma13132938] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/23/2020] [Accepted: 06/26/2020] [Indexed: 12/11/2022]
Abstract
It is well known that energetic demand and environmental pollution are strictly connected; the side products of vehicle and industrial exhausts are considered extremely dangerous for both human and environmental health. In the last years, the possibility to simultaneously photo-degrade water dissolved pollutants by means of ZnO nanostructures and to use their piezoelectric features to enhance the photo-degradation process has been investigated. In the present contribution, an easy and low-cost wet approach to synthetize hexagonal elongated ZnO microstructures in the wurtzite phase was developed. ZnO performances as photo-catalysts, under UV-light irradiation, were confirmed on water dissolved methylene blue dye. Piezoelectric responses of the synthetized ZnO microstructures were evaluated, as well, by depositing them into films onto flexible substrates, and a home-made layout was developed, in order to stimulate the ZnO microstructures deposited on solid supports by means of mechanical stress and UV photons, simultaneously. A relevant increment of the photo-degradation efficiency was observed when the piezopotential was applied, proposing the present approach as a completely eco-friendly tool, able to use renewable energy sources to degrade water solved pollutants.
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Affiliation(s)
- Rosanna Pagano
- Department of Biological and Environmental Sciences and Technologies, DISTEBA, University of Salento, Via per Arnesano, I-73100 Lecce, Italy; (R.P.); (L.V.)
| | - Chiara Ingrosso
- CNR-IPCF Sez. Bari, c/o Department of Chemistry, University of Bari, via Orabona 4, I-70126 Bari, Italy;
| | - Gabriele Giancane
- Department of Cultural Heritage, University of Salento, Via D. Birago, 48, I-73100 Lecce, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via G. Giusti, 9, I-50121 Firenze, Italy;
| | - Ludovico Valli
- Department of Biological and Environmental Sciences and Technologies, DISTEBA, University of Salento, Via per Arnesano, I-73100 Lecce, Italy; (R.P.); (L.V.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via G. Giusti, 9, I-50121 Firenze, Italy;
| | - Simona Bettini
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, INSTM, Via G. Giusti, 9, I-50121 Firenze, Italy;
- Department of Engineering for Innovation, University of Salento, Via per Monteroni, I-73100 Lecce, Italy
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32
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Enhancement of ZnO Nanorods Properties Using Modified Chemical Bath Deposition Method: Effect of Precursor Concentration. CRYSTALS 2020. [DOI: 10.3390/cryst10050386] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In this study, the effects of different precursor concentrations on the growth and characteristics properties of the zinc oxide (ZnO) nanorods (NRs) synthesized by using modified and conventional chemical bath deposition (CBD) methods were investigated. The morphologic, structural and optical properties of synthesized ZnO NRs with different precursor concentrations were studied using various characterization techniques. The experimental results show that the varying precursor concentration of the reactants has a remarkable and significant effect on the growth and characteristics properties of ZnO NRs. In addition, the characteristic properties of ZnO NRs grown using the modified method showed significantly improved and enhanced properties. The average length of grown ZnO NRs increased with increased precursor concentration; it can be seen that longer ZnO NRs have been investigated using the modified CBD methods. The ZnO NRs synthesized at 0.05 M using the modified method were grown with high aspect ratios than the ZnO NRs grown using conventional means which were 25 and 11, respectively. The growth rate increased with increased precursor concentration; it can be observed that a higher growth rate was seen using the modification CBD method. Furthermore, XRD results for the two cases reveal that the grown ZnO samples were a nanorod-like in shape and possessed a hexagonal wurtzite structure with high crystal quality. No other phases from the impurity were observed. The diffraction peaks along (002) plane became higher, sharper and narrower as precursor concentration increased, suggesting that the crystalline quality of ZnO NRs grown using the modified method was more enhanced and better than conventional methods. However, optical studies show that the transmittance at each concentration was more than two times higher than the transmittance using the modified CBD method. In addition, optical studies demonstrated that the ZnO NRs grown by using modified and conventional methods had a direct Eg in the range of (3.2–3.26) eV and (3.15–3.19) eV, respectively. It was demonstrated in two methods that ZnO NRs grown at a precursor concentration 0.05 M gave the most favorable result, since the NRs had best characteristic properties.
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33
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Chen K, Liu Y, Fu Y, Huang J, Feng X, Wang J, Zhai M, Lupoi R, Yin S, Li H. Loading of Zn/ZnO particles in the precursor feedstock affects the characteristics of liquid plasma sprayed nano-ZnO coatings for photocatalytic applications. NANOTECHNOLOGY 2020; 31:185301. [PMID: 31945757 DOI: 10.1088/1361-6528/ab6cda] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is known that ZnO is an n-type semiconductor with photocatalytic performances under ultraviolet light irradiation. Constructing a superior structure for a modified electron band has been one of the major research goals for photocatalytic ZnO. Here we report a new technical route for making nano-ZnO coatings with a porous topographic morphology. The coatings were fabricated by plasma spraying the mixture of suspension and solution liquid precursors. Pre-loading of ZnO and Zn powders in the precursor was carried out for the purpose of tailoring the structure of the coatings. The coatings in micron thicknesses showed a porous skeleton and a fluffy top layer consisting of ultrafine ZnO grains. Photocatalytic testing by measuring the degradation of methylene blue revealed significantly enhanced activities of the coatings deposited using the ZnO/Zn loaded precursor. The hybrid-structured ZnO coatings exhibited a narrowed band gap and modified oxygen defects as compared to those deposited from the single liquid feedstock. The results shed light on a one-step easy thermal spray fabrication of polytropic nanostructured functional coatings by employing solid powder-loaded liquid as the starting feedstock.
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Affiliation(s)
- Kuan Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China. Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China
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34
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Jeong E, Kim CU, Byun J, Lee J, Kim HE, Kim EJ, Choi KJ, Hong SW. Quantitative evaluation of the antibacterial factors of ZnO nanorod arrays under dark conditions: Physical and chemical effects on Escherichia coli inactivation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 712:136574. [PMID: 32050388 DOI: 10.1016/j.scitotenv.2020.136574] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/23/2019] [Accepted: 01/06/2020] [Indexed: 05/15/2023]
Abstract
Although zinc oxide nanorod (ZnO NR) arrays are a nanomaterial that offers efficient bactericidal activity, they have not been systematically evaluated to quantitatively investigate their disinfection mechanism under dark conditions. In this study, ZnO NR arrays of different lengths (0.5-4 μm) were uniformly grown via hydrothermal synthesis. The longer arrays exhibited higher Escherichia coli (E. coli) inactivation efficiency up to 94.2% even under darkness for 30 min. When the NR arrays were coated via Al2O3 atomic layer deposition, the inactivation efficiency was decreased to 56.4% because the generation of reactive oxygen species (ROS) and the leaching of Zn2+ ions were both hindered by the surficial coverage of defect sites. The morphological effect, i.e., the mechanical rupture of E. coli on the surface, contributed 56.4% of the bactericidal efficiency; chemical effects, i.e., ROS formation and zinc ion release, contributed the remaining 37.8% under dark conditions. The bactericidal effect of fabricated ZnO NR arrays was further validated in bottled and pond water spiked with E. coli, exhibiting 87.5% and 80.4% inactivation efficiencies, respectively, within 30 min. Understanding these antibacterial mechanisms is not only of significance for research in this and related fields but also beneficial for potential application in various fields, e.g., biomedical and antifouling areas.
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Affiliation(s)
- Eunhoo Jeong
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Division of Energy and Environment Technology, KIST-School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Chan Ul Kim
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jeehye Byun
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Jiho Lee
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Hyung-Eun Kim
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Eun-Ju Kim
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Division of Energy and Environment Technology, KIST-School, University of Science and Technology, Seoul 02792, Republic of Korea
| | - Kyoung Jin Choi
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Seok Won Hong
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Hwarangro 14 gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Division of Energy and Environment Technology, KIST-School, University of Science and Technology, Seoul 02792, Republic of Korea.
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35
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van Rijt MMJ, Oosterlaken BM, Joosten RRM, Wijkhuijs LEA, Bomans PHH, Friedrich H, de With G. Counter-ion influence on the mechanism of HMTA-mediated ZnO formation. CrystEngComm 2020. [DOI: 10.1039/d0ce00847h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The influence of the metal counter-ion on the mechanism of formation, nucleation location and the reaction product for the formation of ZnO under mild aqueous conditions is demonstrated.
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Affiliation(s)
- Mark M. J. van Rijt
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Bernette M. Oosterlaken
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Rick R. M. Joosten
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Levina E. A. Wijkhuijs
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Paul H. H. Bomans
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Heiner Friedrich
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Gijsbertus de With
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
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36
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Montero-Muñoz M, Ramos-Ibarra JE, Rodríguez-Páez JE, Marques GE, Teodoro MD, Coaquira JAH. Growth and formation mechanism of shape-selective preparation of ZnO structures: correlation of structural, vibrational and optical properties. Phys Chem Chem Phys 2020; 22:7329-7339. [DOI: 10.1039/c9cp06744b] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A shape-selective preparation method was used to obtain highly crystalline rod-, needle-, nut-, and doughnut-like ZnO morphologies with distinct particle sizes and surface areas.
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Affiliation(s)
- M. Montero-Muñoz
- Institute of Physics
- University of Brasília
- 70910-900 Brasília-DF
- Brazil
| | - J. E. Ramos-Ibarra
- Institute of Physics
- University of Brasília
- 70910-900 Brasília-DF
- Brazil
- University Center Estácio Brasília
| | | | - G. E. Marques
- Department of Physics
- Federal University of São Carlos
- 13565-905 São Carlos-SP
- Brazil
| | - M. D. Teodoro
- Department of Physics
- Federal University of São Carlos
- 13565-905 São Carlos-SP
- Brazil
| | - J. A. H. Coaquira
- Institute of Physics
- University of Brasília
- 70910-900 Brasília-DF
- Brazil
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37
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Gerbreders V, Krasovska M, Sledevskis E, Gerbreders A, Mihailova I, Tamanis E, Ogurcovs A. Hydrothermal synthesis of ZnO nanostructures with controllable morphology change. CrystEngComm 2020. [DOI: 10.1039/c9ce01556f] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Optimal synthesis parameters for hydrothermal growth of nine ZnO nanostructure morphologies as a durable, homogeneous coating have been determined.
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Affiliation(s)
- Vjaceslavs Gerbreders
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
| | - Marina Krasovska
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
| | - Eriks Sledevskis
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
| | - Andrejs Gerbreders
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
| | - Irena Mihailova
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
| | - Edmunds Tamanis
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
| | - Andrejs Ogurcovs
- G. Liberts' Innovative Microscopy Centre
- Department of Technology
- Institute of Life Sciences and Technology
- Daugavpils University
- Daugavpils LV-5401
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Papadaki D, Mhlongo GH, Motaung DE, Nkosi SS, Panagiotaki K, Christaki E, Assimakopoulos MN, Papadimitriou VC, Rosei F, Kiriakidis G, Ray SS. Hierarchically Porous Cu-, Co-, and Mn-Doped Platelet-Like ZnO Nanostructures and Their Photocatalytic Performance for Indoor Air Quality Control. ACS OMEGA 2019; 4:16429-16440. [PMID: 31616821 PMCID: PMC6787907 DOI: 10.1021/acsomega.9b02016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 09/12/2019] [Indexed: 05/31/2023]
Abstract
Several parameters, including specific surface area, morphology, crystal size, and dopant concentration, play a significant role in improving the photocatalytic performance of ZnO. However, it is still unclear which of these parameters play a significant role in enhancing the photocatalytic activity. Herein, undoped and Mn-, Co-, and Cu-doped platelet-like zinc oxide (ZnO) nanostructures were synthesized via a facile microwave synthetic route, and their ultraviolet (UV) and visible-light-induced photocatalytic activities, by monitoring the gaseous acetaldehyde (CH3CHO) degradation, were systematically investigated. Both the pure and doped ZnO nanostructures were found to be UV-active, as the CH3CHO oxidation photocatalysts with the Cu-doped ZnO one being the most UV-efficient photocatalyst. However, upon visible light exposure, all ZnO-nanostructured samples displayed no photocatalytic activity except the Co-doped ZnO, which showed a measurable photocatalytic activity. The latter suggests that Co-doped ZnO nanostructures are potent candidates for several indoor photocatalytic applications. Various complementary techniques were utilized to improve the understanding of the influence of Mn-/Co-/Cu-doping on the photocatalytic performance of the ZnO nanostructures. Results showed that the synergetic effects of variation in morphology, surface defects, that is, VO, high specific surface areas, and porosity played a significant role in modulating the photocatalytic activity of ZnO nanostructures.
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Affiliation(s)
- Dimitra Papadaki
- Physics
Department, National and Kapodistrian University
of Athens, Panepistimioupoli, Zografoy, Athens 10679, Greece
- INRS-Centre
Énergie Matériaux Télécommunications, 1650, Boulevard Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada
- DSI-CSIR National Centre for Nanostructured
Materials and National Laser
Centre, Council for Scientific and Industrial
Research, Pretoria 0001, South Africa
| | - Gugu H. Mhlongo
- DSI-CSIR National Centre for Nanostructured
Materials and National Laser
Centre, Council for Scientific and Industrial
Research, Pretoria 0001, South Africa
- Department
of Physics, University of the Free State, P.O. Box, 339, Bloemfontein ZA9300, South Africa
| | - David E. Motaung
- DSI-CSIR National Centre for Nanostructured
Materials and National Laser
Centre, Council for Scientific and Industrial
Research, Pretoria 0001, South Africa
- Department
of Physics, University of the Free State, P.O. Box, 339, Bloemfontein ZA9300, South Africa
| | - Steven S. Nkosi
- DSI-CSIR National Centre for Nanostructured
Materials and National Laser
Centre, Council for Scientific and Industrial
Research, Pretoria 0001, South Africa
| | - Katerina Panagiotaki
- Laboratory
of Photochemistry and Kinetics, Department of Chemistry, University of Crete, VassilikaVouton, Heraklion 71003, Crete, Greece
| | - Emmy Christaki
- Laboratory
of Photochemistry and Kinetics, Department of Chemistry, University of Crete, VassilikaVouton, Heraklion 71003, Crete, Greece
| | - Margarita N. Assimakopoulos
- Physics
Department, National and Kapodistrian University
of Athens, Panepistimioupoli, Zografoy, Athens 10679, Greece
| | - Vassileios C. Papadimitriou
- Laboratory
of Photochemistry and Kinetics, Department of Chemistry, University of Crete, VassilikaVouton, Heraklion 71003, Crete, Greece
| | - Federico Rosei
- INRS-Centre
Énergie Matériaux Télécommunications, 1650, Boulevard Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada
| | - George Kiriakidis
- Institute
of Electronic Structure and Laser (IESL) Foundation for Research and
Technology (FORTH), 100N.
Plastirastr, VassilikaVouton, Heraklion GR-70013, Crete, Greece
- Physics
Department, University of Crete, VassilikaVouton, Heraklion GR-71110, Crete, Greece
| | - Suprakas Sinha Ray
- DSI-CSIR National Centre for Nanostructured
Materials and National Laser
Centre, Council for Scientific and Industrial
Research, Pretoria 0001, South Africa
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, Johannesburg 2028, South
Africa
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39
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Improvement of the Photocatalytic Activity of ZnO/Burkeite Heterostructure Prepared by Combustion Method. Catalysts 2019. [DOI: 10.3390/catal9100817] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In this work, a novel route is discussed to produce in one step ZnO/Burkeite powders by the modified solution combustion method. The ZnO particles enhance the photocatalytic activity in the degradation of Rhodamine B, in which Burkeite mineral acts as a support due to the pH-dependent morphology of the particle aggregates of the as-synthesized powders. The X-ray diffraction (XRD) characterization shows the presence of a heterostructure: ZnO/Burkeite. The Scanning Electron Microscopy (SEM) image shows a morphological dependence with the pH of the solution used for the synthesis. The results show that the system with the highest degradation (92.4%) corresponds to the case in which ZnO/Burkeite heterostructure was synthesized with a pH 11.
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40
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Na HS, Ahn SY, Shim JO, Jeon KW, Kim HM, Lee YL, Jang WJ, Jeon BH, Roh HS. Effect of precipitation on physico-chemical and catalytic properties of Cu-Zn-Al catalyst for water-gas shift reaction. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0309-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Acharya S, Biswal S, Sarangi S. Effect of structure and morphology on the UV photo detection of ZnO nanostructures and microstructures. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.04.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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42
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One-dimensional NiFe2O4 nanorods modified with sulfur-rich spherical carbon nanoparticles for simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid. Mikrochim Acta 2019; 186:434. [DOI: 10.1007/s00604-019-3496-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 05/12/2019] [Indexed: 12/14/2022]
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43
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Sabry RS, Kammel RS. Flexible Sandwich Piezoelectric Nanogenerators based ZnO Nanorods for Mechanical Energy Harvesting. AL-MUSTANSIRIYAH JOURNAL OF SCIENCE 2018. [DOI: 10.23851/mjs.v29i1.372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We present a flexible sandwich piezoelectric nanogenerators (PENGs) device with gold-coated ZnO nanorods (Au@ ZNRs) as an efficient top electrode; this device was used to harvest energy from the human walking motion. ZNRs were synthesised on the two-piece of ZnO seed layer coated gold/flexible polyethylene terephthalate (Au/PET) substrates through a simple hydrothermal method of low temperature and low cost at molar concentration (0.01M). X-ray diffraction and field emission scanning electron microscopy images revealed that the as-grown ZNRs have high crystallinity and apparent vertical growth with hexagonal shapes, the average diameter of NRs is 120 nm. Flexible sandwich PENGs based ZNRs was fabricated with gold-coated one piece of ZNRs by DC-sputtering method as an efficient top electrode, which was placed on the uncoated ZNRs as-grown on another piece of substrate. The maximum output potential voltage (Vmax) under a periodic of pressing and releasing of human walking is 5.76 V. The results confirmed the top efficient electrode has created more contact area with uncoated NR when it is pressed, which increases the transfer efficiency effectively of piezoelectric potential that generated from uncoated ZNRs.
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Chalangar E, Machhadani H, Lim SH, Karlsson KF, Nur O, Willander M, Pettersson H. Influence of morphology on electrical and optical properties of graphene/Al-doped ZnO-nanorod composites. NANOTECHNOLOGY 2018; 29:415201. [PMID: 30015332 DOI: 10.1088/1361-6528/aad3ec] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The development of future 3D-printed electronics relies on the access to highly conductive inexpensive materials that are printable at low temperatures (<100 ◦C). The implementation of available materials for these applications are, however, still limited by issues related to cost and printing quality. Here, we report on the simple hydrothermal growth of novel nanocomposites that are well suited for conductive printing applications. The nanocomposites comprise highly Al-doped ZnO nanorods grown on graphene nanoplatelets (GNPs). The ZnO nanorods play the two major roles of (i) preventing GNPs from agglomerating and (ii) promoting electrical conduction paths between the graphene platelets. The effect of two different ZnO-nanorod morphologies with varying Al-doping concentration on the nanocomposite conductivity and the graphene dispersity are investigated. Time-dependent absorption, photoluminescence and photoconductivity measurements show that growth in high pH solutions promotes a better graphene dispersity, higher doping levels and enhanced bonding between the graphene and the ZnO nanorods. Growth in low pH solutions yields samples characterized by a higher conductivity and a reduced number of surface defects. These samples also exhibit a large persistent photoconductivity attributed to an effective charge separation and transfer from the nanorods to the graphene platelets. Our findings can be used to tailor the conductivity of novel printable composites, or for fabrication of large volumes of inexpensive porous conjugated graphene-semiconductor composites.
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Affiliation(s)
- Ebrahim Chalangar
- Department of Science and Technology (ITN), Faculty of Science & Engineering, Linköping University, Norrköping, Sweden. Department of Mathematics, Physics and Electrical Engineering, Halmstad University, Halmstad, Sweden
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45
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Alshehri NA, Lewis AR, Pleydell-Pearce C, Maffeis TG. Investigation of the growth parameters of hydrothermal ZnO nanowires for scale up applications. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2017.09.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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46
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Teow SY, Wong MMT, Yap HY, Peh SC, Shameli K. Bactericidal Properties of Plants-Derived Metal and Metal Oxide Nanoparticles (NPs). Molecules 2018; 23:molecules23061366. [PMID: 29882775 PMCID: PMC6100366 DOI: 10.3390/molecules23061366] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 05/12/2018] [Accepted: 05/15/2018] [Indexed: 11/25/2022] Open
Abstract
Nanoparticles (NPs) are nano-sized particles (generally 1–100 nm) that can be synthesized through various methods. The wide range of physicochemical characteristics of NPs permit them to have diverse biological functions. These particles are versatile and can be adopted into various applications, particularly in biomedical field. In the past five years, NPs’ roles in biomedical applications have drawn considerable attentions, and novel NPs with improved functions and reduced toxicity are continuously increasing. Extensive studies have been carried out in evaluating antibacterial potentials of NPs. The promising antibacterial effects exhibited by NPs highlight the potential of developing them into future generation of antimicrobial agents. There are various methods to synthesize NPs, and each of the method has significant implication on the biological action of NPs. Among all synthetic methods, green technology is the least toxic biological route, which is particularly suitable for biomedical applications. This mini-review provides current update on the antibacterial effects of NPs synthesized by green technology using plants. Underlying challenges in developing NPs into future antibacterials in clinics are also discussed at the present review.
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Affiliation(s)
- Sin-Yeang Teow
- Department of Medical Sciences, School of Healthcare and Medical Sciences, Sunway University, Jalan Universiti, Bandar Sunway, Subang Jaya 47500, Selangor Darul Ehsan, Malaysia.
| | - Magdelyn Mei-Theng Wong
- Department of Medical Sciences, School of Healthcare and Medical Sciences, Sunway University, Jalan Universiti, Bandar Sunway, Subang Jaya 47500, Selangor Darul Ehsan, Malaysia.
| | - Hooi-Yeen Yap
- Department of Medical Sciences, School of Healthcare and Medical Sciences, Sunway University, Jalan Universiti, Bandar Sunway, Subang Jaya 47500, Selangor Darul Ehsan, Malaysia.
| | - Suat-Cheng Peh
- Department of Medical Sciences, School of Healthcare and Medical Sciences, Sunway University, Jalan Universiti, Bandar Sunway, Subang Jaya 47500, Selangor Darul Ehsan, Malaysia.
- Anatomical Pathology Department, Sunway Medical Centre, Jalan Lagoon Selatan, Bandar Sunway, Subang Jaya 47500, Selangor Darul Ehsan, Malaysia.
| | - Kamyar Shameli
- Department of Environment and Green Technology, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia.
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47
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Kamruzzaman M, Zapien JA. Effect of Temperature, Time, Concentration, Annealing, and Substrates on ZnO Nanorod Arrays Growth by Hydrothermal Process on Hot Plate. CRYSTALLOGR REP+ 2018. [DOI: 10.1134/s1063774518030112] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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48
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Effect of Temperature and Growth Time on Vertically Aligned ZnO Nanorods by Simplified Hydrothermal Technique for Photoelectrochemical Cells. MATERIALS 2018; 11:ma11050704. [PMID: 29710822 PMCID: PMC5978081 DOI: 10.3390/ma11050704] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 11/22/2022]
Abstract
Despite its large band gap, ZnO has wide applicability in many fields ranging from gas sensors to solar cells. ZnO was chosen over other materials because of its large exciton binding energy (60 meV) and its stability to high-energy radiation. In this study, ZnO nanorods were deposited on ITO glass via a simple dip coating followed by a hydrothermal growth. The morphological, structural and compositional characteristics of the prepared films were analyzed using X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), and ultraviolet-visible spectroscopy (UV-Vis). Photoelectrochemical conversion efficiencies were evaluated via photocurrent measurements under calibrated halogen lamp illumination. Thin film prepared at 120 °C for 4 h of hydrothermal treatment possessed a hexagonal wurtzite structure with the crystallite size of 19.2 nm. The average diameter of the ZnO nanorods was 37.7 nm and the thickness was found to be 2680.2 nm. According to FESEM images, as the hydrothermal growth temperature increases, the nanorod diameter become smaller. Moreover, the thickness of the nanorods increase with the growth time. Therefore, the sample prepared at 120 °C for 4 h displayed an impressive photoresponse by achieving high current density of 0.1944 mA/cm2.
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49
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Wang T, Centeno A, Darvill D, Pang JS, Ryan MP, Xie F. Tuneable fluorescence enhancement of nanostructured ZnO arrays with controlled morphology. Phys Chem Chem Phys 2018; 20:14828-14834. [DOI: 10.1039/c8cp01493k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate a tuneable fluorescence enhancement effect for fluorescence-based biosensing with ZnO-aligned nanorod forests and nanoflower arrays with controlled morphology.
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Affiliation(s)
- Tiesheng Wang
- Department of Materials
- Imperial College London
- London
- UK
| | - Anthony Centeno
- Department of Electrical and Electronic Engineering
- Xi’an Jiaotong Liverpool University
- Jiangsu
- China
| | | | - Jing S. Pang
- Department of Materials
- Imperial College London
- London
- UK
| | - Mary P. Ryan
- Department of Materials
- Imperial College London
- London
- UK
| | - Fang Xie
- Department of Materials
- Imperial College London
- London
- UK
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50
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Papadaki D, Foteinis S, Mhlongo GH, Nkosi SS, Motaung DE, Ray SS, Tsoutsos T, Kiriakidis G. Life cycle assessment of facile microwave-assisted zinc oxide (ZnO) nanostructures. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 586:566-575. [PMID: 28209407 DOI: 10.1016/j.scitotenv.2017.02.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 02/02/2017] [Accepted: 02/03/2017] [Indexed: 06/06/2023]
Abstract
The life cycle assessment of several zinc oxide (ZnO) nanostructures, fabricated by a facile microwave technique, is presented. Key synthesis parameters such as annealing temperature, varied from 90°C to 220°C, and microwave power, varied from 110W to 710W, are assessed. The effect of these parameters on both the structural characteristics and the environmental sustainability of the nanostructures is examined. The nanostructures were characterized by means of X-ray diffraction (XRD), focused ion beam scanning electron microscopy (FIB-SEM), ultraviolet-visible spectroscopy (UV-Vis), Photoluminescence (PL) and Brunauer-Emmett-Teller (BET) analysis. Crystalline size was found to be 22.40nm at 110W microwave power, 24.83nm at 310W, and 24.01nm at 710W. Microwave power and synthesis temperature were both directly proportional to the surface area. At 110W the surface area was 10.44m2/g, at 310W 12.88m2/g, and at 710W 14.60m2/g; while it was found to be 11.64m2/g at 150°C and 18.09m2/g at 220°C. Based on these, a life cycle analysis (LCA) of the produced ZnO nanoparticles was carried out, using the ZnO surface area (1m2/g) as the functional unit. It was found that the main environmental weaknesses identified during the production process were; (a) the use of ethanol for purifying the produced nanomaterials and (b) the electricity consumption for the ZnO calcination, provided by South Africa's fossil-fuel dependent electricity source. When the effect of the key synthesis parameters on environmental sustainability was examined it was found that an increase of either microwave power (from 110 to 710W) or synthesis temperatures (from 90 to 220°C), results in higher sustainability, with the environmental footprint reduced by 27% and 41%, respectively. Through a sensitivity analysis, it was observed that an electricity mix based on renewable energy could improve the environmental sustainability of the nanoparticles by 25%.
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Affiliation(s)
- D Papadaki
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH), 100, N. Plastira str, Vassilika Vouton, GR-70013 Heraklion, Crete, Greece; School of Environmental Engineering, Technical University of Crete, GR-73100 Chania, Greece; DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa.
| | - S Foteinis
- School of Environmental Engineering, Technical University of Crete, GR-73100 Chania, Greece
| | - G H Mhlongo
- DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
| | - S S Nkosi
- University of Zululand, Department of Physics and Engineering, Private Bag X1001, Kwadlangezwa, 3886, South Africa
| | - D E Motaung
- DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
| | - S S Ray
- DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
| | - T Tsoutsos
- School of Environmental Engineering, Technical University of Crete, GR-73100 Chania, Greece
| | - G Kiriakidis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH), 100, N. Plastira str, Vassilika Vouton, GR-70013 Heraklion, Crete, Greece; Physics Department, University of Crete, Vassilika Vouton, GR-71110 Heraklion, Crete, Greece
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