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Jeon H, Hoang DT, Baik J, Hong S, Lee H. Reduction-Assisted Calcination Enhances the Photocatalytic Activity of ZnO and WO 3 Nanoparticles in Biomass Conversion. Inorg Chem 2024; 63:12370-12376. [PMID: 38897587 DOI: 10.1021/acs.inorgchem.4c02032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Rising energy needs and environmental issues have prompted the creation of effective and affordable photocatalysts for converting biomass. Utilizing abundant biomass, oxidation of 5-hydroxymethylfurfural (HMF) emerges as a method for generating high-value chemicals from biomass, offering an alternative to fossil fuels. We synthesized defect-engineered metal oxides (ZnO and WO3) by calcination with NaBH4 as a reducing agent. Atomic-level analyses identified oxygen vacancy defects induced by the reduction of metal ions within the metal oxide nanoparticles. Further analysis showed an unchanged band gap but an up to 4-fold increase in current density. This enhancement is attributed to the trapping of electrons in defect sites created during the calcination process. The formation of new electron donor states hindered photogenerated electron-hole recombination, enhancing the photocatalytic efficiency of the metal oxide. The photocatalytic degradation yield of HMF was over 95%, and the selective organic products 2,5-diformylfuran (DFF) and 2,5-furandicarboxylic acid (FDCA) were obtained without byproducts. Kinetic studies demonstrated that the photocatalytic conversion reaction rates were accelerated by up to 3.5-fold. Improved photocatalytic activity for HMF oxidation was achieved by introducing oxygen vacancy defects upon the reduction of metal ions within the metal oxides. Our results provide a promising approach for designing efficient photocatalysts.
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Affiliation(s)
- Hyeri Jeon
- Department of Chemistry & Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dung Thanh Hoang
- Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Jaeyoon Baik
- Beamline Research Division, Pohang Accelerator Laboratory (PAL), POSTECH, Pohang 37673, Republic of Korea
| | - Seungwoo Hong
- Department of Chemistry & Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Hangil Lee
- Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea
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2
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Kaur A, Goswami T, Babu KJ, Ghosh HN. Ultrafast Electron and Hole Transfer and Efficient Charge Separation in a Sb 2Se 3/CdS Thin Film p-n Heterojunction. J Phys Chem Lett 2024; 15:3541-3548. [PMID: 38526219 DOI: 10.1021/acs.jpclett.4c00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Harvesting solar energy for different applications requires the continuous development of new semiconducting materials to exploit a broad part of the solar spectrum. In this direction, antimony selenide (Sb2Se3) has attracted a tremendous amount of attention over the past few years as a light-harvesting material for photovoltaic device applications owing to its phase stability, high absorption coefficient, earth abundance, and low toxicity. Here, we have fabricated a high-quality heterojunction of a p-type Sb2Se3 film and an n-type CdS film using the thermal evaporation technique. The photocurrent of the heterosystem was significantly higher than that of the pristine materials. This optoelectronic response was investigated using femtosecond transient absorption (TA) spectroscopy. TA study reveals the existence of an instantaneous electron transfer from Sb2Se3 to CdS, accompanied by a substantial charge separation at the heterojunction. Our study deals with the investigation of a well-designed p-n device, paving the way for the fabrication of highly efficient photovoltaic devices.
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Affiliation(s)
- Arshdeep Kaur
- Institute of Nano Science and Technology, SAS Nagar Sector 81, Mohali, Punjab 140306, India
| | - Tanmay Goswami
- Institute of Nano Science and Technology, SAS Nagar Sector 81, Mohali, Punjab 140306, India
| | | | - Hirendra N Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India
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3
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Liu H, Li S, Wang L, Yang S, Zhang Y. Synthesis and characterization of ZrO 2-ZnO heterojunction composite for isopropanol detection. RSC Adv 2024; 14:2983-2992. [PMID: 38239449 PMCID: PMC10794953 DOI: 10.1039/d3ra06701g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 12/23/2023] [Indexed: 01/22/2024] Open
Abstract
We prepared ZrO2-ZnO heterojunction composites by a simple hydrothermal method as materials sensitive to isopropanol gas. The 5% ZrO2-ZnO sample presented a uniform rod-like structure. The optimum operating temperature, sensitivity and response/recovery times were measured to investigate the response of ZrO2-ZnO composites to isopropanol. The sensor based on 5% ZrO2-ZnO composites at an optimum temperature of 260 °C had a response to 100 ppm isopropanol of up to 172.46, which was about 3.6 times higher than that of pure ZnO. The sensor also exhibited fast response and recovery times of 5 s and 11 s, respectively. The gas-sensitive properties can be attributed to the rod-like structure, heterojunction structure and catalytic activity of ZrO2. These results would contribute in expanding the application of ZrO2 in gas sensors.
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Affiliation(s)
- Hang Liu
- School of Electrical and Computer Engineering, Jilin Jianzhu University Changchun 130118 China
| | - Shenghui Li
- School of Electrical and Computer Engineering, Jilin Jianzhu University Changchun 130118 China
| | - Lvqing Wang
- School of Electrical and Computer Engineering, Jilin Jianzhu University Changchun 130118 China
| | - Shengjue Yang
- School of Electrical and Computer Engineering, Jilin Jianzhu University Changchun 130118 China
| | - Yuhong Zhang
- School of Electrical and Computer Engineering, Jilin Jianzhu University Changchun 130118 China
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4
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Liu G, Liu H, Yue T, Feng W. SA novel NiO/ZnO biomorphic nanotubes synthesized using human hair template with an enhanced gas sensing for n-butanol. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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ZnO/NiO heterostructures with enhanced photocatalytic activity obtained by ultrasonic spraying of a NiO shell onto ZnO nanorods. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Chelu M, Chesler P, Anastasescu M, Hornoiu C, Mitrea D, Atkinson I, Brasoveanu C, Moldovan C, Craciun G, Gheorghe M, Gartner M. ZnO/NiO heterostructure-based microsensors used in formaldehyde detection at room temperature: Influence of the sensor operating voltage. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN ELECTRONICS 2022; 33:19998-20011. [PMID: 38625349 PMCID: PMC9364853 DOI: 10.1007/s10854-022-08818-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/22/2022] [Indexed: 05/31/2023]
Abstract
Recently the emissions of volatile organic compounds (VOCs) in the atmosphere have increased dramatically with rapid development of urbanization and industry. This led to a large decline in air quality around the world, which resulted in a heavy impact on human health. Therefore, new/cheap detection devices for VOCs are of high interest. Formaldehyde (FA) is a very toxic VOC, which damages the respiratory system even in the smallest doses and short exposure time. Zinc oxide (ZnO)/nickel oxide (NiO) heterostructures were synthesized using an economical route: firstly, NiO was prepared by liquid exfoliation technique and deposited by dip-coating on alumina ceramic transducers with two interdigital gold (Au) electrodes, followed by low-temperature hydrothermal growth of ZnO. The as-prepared sensors were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM-EDAX), and X-Ray fluorescence (XRF). The response/recovery of ZnO/NiO heterostructure-based microsensors for formaldehyde was investigated at room temperature, in agreement with modern sensing requirements. The sensor operating voltage was varied between 1.5 and 5.0 V direct current (DC), to achieve the best sensor performance.
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Affiliation(s)
- Mariana Chelu
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Paul Chesler
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Mihai Anastasescu
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Cristian Hornoiu
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Daiana Mitrea
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Irina Atkinson
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Costin Brasoveanu
- National Institute for Research and Development in Microtechnologies, Platforma IPRS Baneasa, Strada Erou Iancu Nicolae 126A, 077190 Voluntari, Ilfov Romania
| | - Carmen Moldovan
- National Institute for Research and Development in Microtechnologies, Platforma IPRS Baneasa, Strada Erou Iancu Nicolae 126A, 077190 Voluntari, Ilfov Romania
| | - Gabriel Craciun
- National Institute for Research and Development in Microtechnologies, Platforma IPRS Baneasa, Strada Erou Iancu Nicolae 126A, 077190 Voluntari, Ilfov Romania
| | - Marin Gheorghe
- NANOM MEMS SRL, Strada George Cosbuc 9, 505400 Rasnov, Brasov Romania
| | - Mariuca Gartner
- “Ilie Murgulescu” Institute of Physical Chemistry - Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
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Sardana S, Kaur H, Arora B, Aswal DK, Mahajan A. Self-Powered Monitoring of Ammonia Using an MXene/TiO 2/Cellulose Nanofiber Heterojunction-Based Sensor Driven by an Electrospun Triboelectric Nanogenerator. ACS Sens 2022; 7:312-321. [PMID: 35029965 DOI: 10.1021/acssensors.1c02388] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Real-time monitoring of harmful gases is of great significance to identify the environmental hazards to people's lives. However, this application scenario requiring low-power consumption, superior sensitivity, portability, and self-driven operation of gas sensors remains a challenge. Herein, an electrospun triboelectric nanogenerator (TENG) is synthesized using highly electronegative and conducting MXene nanofibers (NFs) paired with biodegradable cellulose acetate NFs (CA-NFs) as triboelectric layers, which supports a sufficient power density (∼1361 mW/m2@2 MΩ) and shows a self-powered ability to operate the chemiresistive gas sensor fabricated in this work. Further, by using cellulose nanofibers (C-NFs) as a substrate, a new kind of MXene/TiO2/C-NFs heterojunction-based sensory component is developed for detection of NH3. This sensor exhibits excellent reproducibility, high selectivity, and sensitivity toward NH3 (1-100 ppm) along with a fast response/recovery time (76 s/62 s) at room temperature. Finally, a monitoring system comprising a TENG-powered sensor, an equivalent circuit, and an LED visualizer has been assembled and successfully demonstrated as a fully self-powered device for NH3 leakage detection. Thus, this work pushes forward the intelligent gas sensing network self-driven by human motion energy, dispensing the external battery dependence for environment monitoring to reduce the possible health effects.
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Affiliation(s)
- Sagar Sardana
- Department of Physics, Guru Nanak Dev University, Amritsar 143005, India
| | - Harpreet Kaur
- Department of Physics, Guru Nanak Dev University, Amritsar 143005, India
| | - Bindiya Arora
- Department of Physics, Guru Nanak Dev University, Amritsar 143005, India
| | - Dinesh Kumar Aswal
- Health, Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Aman Mahajan
- Department of Physics, Guru Nanak Dev University, Amritsar 143005, India
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8
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The Oxygen Vacancy Defect of ZnO/NiO Nanomaterials Improves Photocatalytic Performance and Ammonia Sensing Performance. NANOMATERIALS 2022; 12:nano12030433. [PMID: 35159778 PMCID: PMC8838695 DOI: 10.3390/nano12030433] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 01/27/2023]
Abstract
In this paper, ZnO/NiO composites rich in oxygen vacancies are prepared by the solvothermal method and reduction method. In the test, through the use of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and electron paramagnetic resonance (EPR), we effectively prove the existence of phase, morphology and oxygen vacancies in the material. Through the photocatalysis test and gas sensitivity test, it is found that 10% Ni doped OZN-10 has the best photocatalytic activity and gas sensitivity characteristics. The degradation rate of methylene blue (MB) was 98%. The gas sensitivity test shows that OZN-10 has good selectivity, good response performance (3000 ppm, 27,887%) and excellent response recovery time (response time: 50 s, recovery time: 5–7 s) for saturated NH3 gas at standard atmospheric pressure (101.325 KPa) and room temperature (25 °C). The synergistic effect of oxygen vacancy as the center of a trap and p–n heterojunction forming an electric potential field at the interface is explained, and the mechanism of improving photocatalysis and gas sensitivity is analyzed. This work will provide an innovative vision for dual-performance oxygen vacancy modification of heterojunctions through photocatalysis.
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9
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Kumar YR, Deshmukh K, Ali MMN, Abhijay G, Al-Onazi WA, Al-Mohaimeed AM, Pasha SKK. Structure, morphology and modelling studies of polyvinylalcohol nanocomposites reinforced with nickel oxide nanoparticles and graphene quantum dots. ENVIRONMENTAL RESEARCH 2022; 203:111842. [PMID: 34363804 DOI: 10.1016/j.envres.2021.111842] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Nickel oxide (NiO) nanoparticles (NPs) and graphene quantum dots (GQDs) reinforced polyvinyl alcohol (PVA) nanocomposite films were prepared using a solution casting technique. The physicochemical characteristics of PVA/NiO/GQDs (PNG) nanocomposite films were studied using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and field emission scanning electron microscopy (FESEM). The obtained PNG nanocomposite films showed good mechanical flexibility and improved tensile strength. The influence of nanofiller concentrations on PNG nanocomposite film. The obtained results demonstrate an increase in the activation energy (Ea) up to PNG3 upon increasing the GQDs concentration and thereafter, its decreases. The fundamental interactions of the constituents of PNG nanocomposite film were investigated using density functional theory (DFT). This study on electronic structure reveals that the PVA model indirectly interacts with GQDs through the NiO model. This configuration is favoured in terms of interaction energy (-78 kJ/mol) compared to the one in which PVA interacts directly with the GQDs model.
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Affiliation(s)
- Y Ravi Kumar
- Functional Nanomaterials and Nanocomposite Laboratory, Department of Physics, VIT-AP University, Amaravati, Guntur, 522501, Andhra Pradesh, India
| | - Kalim Deshmukh
- New Technologies - Research Center, University of West Bohemia, Univerzitní 8, 30614, Plzeň, Czech Republic
| | - M Mohamed Naseer Ali
- Department of Physics, The New College (Autonomous), University of Madras, Chennai, 600014, Tamil Nadu, India
| | - Gade Abhijay
- Functional Nanomaterials and Nanocomposite Laboratory, Department of Physics, VIT-AP University, Amaravati, Guntur, 522501, Andhra Pradesh, India
| | - Wedad A Al-Onazi
- Department of Chemistry, College of Science, King Saud University, P.O.Box 22452, Riyadh, 11495, Saudi Arabia
| | - Amal M Al-Mohaimeed
- Department of Chemistry, College of Science, King Saud University, P.O.Box 22452, Riyadh, 11495, Saudi Arabia
| | - S K Khadheer Pasha
- Functional Nanomaterials and Nanocomposite Laboratory, Department of Physics, VIT-AP University, Amaravati, Guntur, 522501, Andhra Pradesh, India.
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10
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Nagaraju Y, Ganesh H, Veeresh S, Vijeth H, Basappa M, Devendrappa H. Self-templated one-step hydrothermal synthesis of hierarchical actinomorphic flower-like SnO2-ZnO nanorods for high-performance supercapacitor application. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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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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Visible-Light-Driven Bio-Templated Magnetic Copper Oxide Composite for Heterogeneous Photo-Fenton Degradation of Tetracycline. WATER 2021. [DOI: 10.3390/w13141918] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The development of a visible-light-driven, reusable, and long-lasting catalyst for the heterogeneous photo-Fenton process is critical for practical application in the treatment of contaminated water. This study focuses on synthesizing a visible-light-driven heterogenous bio-templated magnetic copper oxide composite (Fe3O4/CuO/C) by a two-step process of bio-templating and hydrothermal processes. The prepared composite was characterized by field emission-scanning electron microscope (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), electrical impedance spectroscopy (EIS), and vibrating sample magnetometer (VSM). The results reveal that the prepared composite retains the template’s (corn stalk’s) original porous morphology, and a substantial amount of CuO and Fe3O4 particles are loaded onto the surface of the template. The prepared Fe3O4/CuO/C composite was employed as a catalyst for heterogeneous photo-Fenton degradation of tetracycline (TC) irradiated by visible light. The prepared Fe3O4/CuO/C catalyst has high efficiency towards TC degradation within 60 min across a wide pH range irradiated by visible light, which is attributed to its readily available interfacial boundaries, which significantly improves the movement of photoexcited electrons across various components of the prepared composite. The influence of other parameters such as initial H2O2 concentration, initial concentration of TC, and catalyst dosages was also studied. In addition to high efficiency, the prepared catalyst’s performance was sustained after five cycles, and its recovery is aided by the use of an external magnetic field. This research paper highlights the development of a heterogeneous catalyst for the elimination of refractory organic compounds in wastewater.
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Abstract
NiO-loaded SnO2 powders were prepared involving two chemical procedures. The mesoporous SnO2 support was synthesized by a hydrothermal route using Brij 35 non-ionic surfactant as a template. The nickel loadings of 1 and 10 wt.%. NiO were deposited by the wet impregnation method. The H2S sensing properties of xNiO-(1-x)SnO2 (x = 0, 1, 10%) thick layers deposited onto commercial substrates have been investigated with respect to different potential interfering gases (NO2, CO, CO2, CH4, NH3 and SO2) over a wide range of operating temperatures and relative humidity specific for in-field conditions. Following the correlation of the sensing results with the morphological ones, 1wt.% NiO/SnO2 was selected for simultaneous electrical resistance and work function investigations. The purpose was to depict the sensing mechanism by splitting between specific changes over the electron affinity induced by the surface coverage with hydroxyl dipoles and over the band bending induced by the variable surface charge under H2S exposure. Thus, it was found that different gas-interaction partners are dependent upon the amount of H2S, mirrored through the threshold value of 5 ppm H2S, which from an applicative point of view, represents the lower limit of health effects, an eight-hour TWA.
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14
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J P, Kottam N, A R. Investigation of photocatalytic degradation of crystal violet and its correlation with bandgap in ZnO and ZnO/GO nanohybrid. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108460] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Virgin Jeba S, Sebastiammal S, Sonia S, Lesly Fathima A. Synthesis, growth mechanism and photocatalytic properties of nickel oxide (NiO) nanoflower: a hydrothermal process. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1837163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- S. Virgin Jeba
- Research Department of Physics, Holy Cross College (Autonomous), Nagercoil, India
| | - S. Sebastiammal
- Research Department of Physics, Holy Cross College (Autonomous), Nagercoil, India
| | - S. Sonia
- Research Department of Physics, Holy Cross College (Autonomous), Nagercoil, India
| | - A. Lesly Fathima
- Research Department of Physics, Holy Cross College (Autonomous), Nagercoil, India
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Kotchasak N, Inyawilert K, Wisitsoraat A, Tuantranont A, Phanichphant S, Channei D, Yordsri V, Liewhiran C. Chemophysical acetylene-sensing mechanisms of Sb 2O 3/NaWO 4-doped WO 3 heterointerfaces. Phys Chem Chem Phys 2020; 22:20482-20498. [PMID: 32966427 DOI: 10.1039/d0cp01444c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Sb2O3-loaded NaWO4-doped WO3 nanorods were fabricated with varying Sb contents from 0 to 2 wt% by precipitation/impregnation methods and their p-type acetylene (C2H2) gas-sensing mechanisms were rigorously analyzed. Material characterization by X-ray diffraction, X-ray photoelectron spectroscopy, scanning transmission electron microscopy and nitrogen adsorption indicated the construction of short NaWO4-doped monoclinic WO3 nanorods loaded with very fine Sb2O3 nanoparticles. The sensors were fabricated by powder pasting and spin coating and their gas-sensing characteristics were evaluated towards 0.08-1.77 vol% C2H2 at 200-350 °C in dry air. The gas-sensing properties of the NaWO4-doped WO3 sensor with the optimum Sb content of 1 wt% showed the highest p-type response of ∼250.2 to 1.77 vol% C2H2, which was more than 20 times as high as that of the unloaded one at the best working temperature of 250 °C. Furthermore, the Sb2O3-loaded sensor offered high C2H2 selectivity against CH4, H2, C3H6O, C2H5OH, HCHO, CH3OH, C8H10, C7H8, C2H4 and NO2. Mechanisms responsible for the observed p-type sensing and response enhancement behaviors were proposed based on the NaWO4-doped WO3-Sb2O3 (p-n) heterointerfaces and catalytic spillover effects. Consequently, the Sb2O3-loaded NaWO4-doped WO3 nanorods have potential as alternative p-type gas sensors for selective and sensitive C2H2 detection in various industrial applications.
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Affiliation(s)
- Nataporn Kotchasak
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. and Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Kanittha Inyawilert
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. and Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Anurat Wisitsoraat
- Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand and National Security and Dual-Use Technology Center, National Science and Technology Development Agency (NSTDA), Klong Luang, Phathum Thani 12120, Thailand
| | - Adisorn Tuantranont
- Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand and National Security and Dual-Use Technology Center, National Science and Technology Development Agency (NSTDA), Klong Luang, Phathum Thani 12120, Thailand
| | - Sukon Phanichphant
- Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Duangdao Channei
- Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
| | - Visittapong Yordsri
- National Metal and Materials Technology Center, National Science and Technology Development Agency (NSTDA), Klong Luang, Pathumthani 12120, Thailand
| | - Chaikarn Liewhiran
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. and Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand and Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand
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17
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Liang YC, Chiang KJ. Design and tuning functionality of rod-like titanium dioxide-nickel oxide composites via a combinational methodology. NANOTECHNOLOGY 2020; 31:195709. [PMID: 32096482 DOI: 10.1088/1361-6528/ab7046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
TiO2-NiO composite nanorods were synthesized by combining hydrothermal growth of TiO2 nanorods and sputtering deposition of NiO film. Crystalline NiO coverage films with various thicknesses were sputter coated onto TiO2 nanorods by controlling NiO sputtering duration. The crystallographic analyses demonstrate that crystalline rutile TiO2-cubic NiO composite nanorods were formed herein. In comparison with pristine TiO2 and NiO, the coverage of NiO crystals on the TiO2 nanorods led to an enhanced photodegradation activity of the TiO2-NiO composites towards Rhodamine B dyes under irradiation. Moreover, the TiO2-NiO composite nanorods with the adequate content of NiO coverage layer show superior gas-sensing responses to 25-200 ppm ammonia gas in comparison with those of the constituent counterparts. The experimental results herein demonstrate that decoration of NiO film on the surfaces of TiO2 nanorods with tunable coverage sizes via sputtering deposition is a promising approach to design TiO2-NiO composite nanorods with desirable functionalities.
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Affiliation(s)
- Yuan-Chang Liang
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan
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18
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Idrus-Saidi SA, Tang J, Yang J, Han J, Daeneke T, O’Mullane AP, Kalantar-Zadeh K. Liquid Metal-Based Route for Synthesizing and Tuning Gas-Sensing Elements. ACS Sens 2020; 5:1177-1189. [PMID: 32223132 DOI: 10.1021/acssensors.0c00233] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There is a strong demand for developing tunable and facile routes for synthesizing gas-sensitive semiconducting compounds. The concept of synthesizing micro- and nanoparticles of metallic compounds in a tunable process, which relies on liquid metals, is presented here. This is a liquid-based ultrasonication procedure within which additional metallic elements (In, Sn, and Zn) are incorporated into liquid Ga that is sonicated in a secondary solvent. We investigate liquid metal sonication in dimethyl sulfoxide (DMSO) and water to show their impact on the size, morphology, and crystal structure of the particulated products. The synthesized materials are annealed to investigate their responses to model reducing (H2) and oxidizing (NO2) gas species. The preparation process in DMSO gives rise to predominantly monoclinic Ga2O3 crystals which are favorable for gas sensing, while the emergence of rhombohedral Ga2O3 phases from the water sonication process led to inactive samples. The ease of tunability without hazardous precursors during the synthesis procedure is demonstrated. The route presented here can be uniquely employed for designing and engineering on-demand functional materials for sensing applications.
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Affiliation(s)
- Shuhada A. Idrus-Saidi
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jiong Yang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jialuo Han
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Torben Daeneke
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Anthony P. O’Mullane
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia
| | - Kourosh Kalantar-Zadeh
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
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19
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Luo P, Xie M, Luo J, Kan H, Wei Q. Nitric oxide sensors using nanospiral ZnO thin film deposited by GLAD for application to exhaled human breath. RSC Adv 2020; 10:14877-14884. [PMID: 35497175 PMCID: PMC9052016 DOI: 10.1039/d0ra00488j] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/23/2020] [Indexed: 12/26/2022] Open
Abstract
ZnO is a promising gas sensing material for its excellent gas sensing response characteristics and long-term stability. Moreover, the improvement in the sensitivity and response speed of ZnO gas sensors can be achieved by the nanostructure fabrication. This paper proposes a facile method to deposit ZnO nanospirals using glancing angle deposition (GLAD) for application in nitric oxide (NO) sensors. ZnO nanospirals with porous characteristics have larger relative surface area and more active surfaces, compared with dense ZnO thin film. A sensor using nanospiral ZnO film shows a response factor of 16.9 to 100 ppb NO at 150 °C in 40% RH, which is 3 times larger than that of the sensor using dense ZnO film. Such a ZnO nanospiral sensor system can detect NO as low as 10 ppb which is below the NO concentration (>30 ppb) in exhaled breath of patients with asthma. The effects of working temperature and humidity on the sensor performance were investigated systematically in this work. Moreover, the sensor response showed a good selectivity to NO and high stability as the time increased up to 24 days. NO gas sensing mechanism was discussed in detail and nanospiral ZnO film sensors are promisingly applicable for exhaled human breath application compared with some other NO sensors.
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Affiliation(s)
- Pingxiang Luo
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University 350001 China
| | - Min Xie
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University 350001 China
| | - Jingting Luo
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Optoelectronic Engineering, Shenzhen University 518060 Shenzhen China
| | - Hao Kan
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Optoelectronic Engineering, Shenzhen University 518060 Shenzhen China
| | - Qiuping Wei
- School of Materials Science and Engineering, State Key Laboratory of Powder Metallurgy, Central South University Changsha 410083 China
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20
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Zhao X, Xie W, Deng Z, Wang G, Cao A, Chen H, Yang B, Wang Z, Su X, Yang C. Salt templated synthesis of NiO/TiO2 supported carbon nanosheets for photocatalytic hydrogen production. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124365] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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21
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Surface Morphology-Dependent Functionality of Titanium Dioxide-Nickel Oxide Nanocomposite Semiconductors. NANOMATERIALS 2019; 9:nano9121651. [PMID: 31766325 PMCID: PMC6956268 DOI: 10.3390/nano9121651] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 11/08/2019] [Accepted: 11/19/2019] [Indexed: 12/12/2022]
Abstract
In this study, TiO2–NiO heterostructures were synthesized by combining hydrothermal and chemical bath deposition methods. The post-annealing temperature was varied to control the surface features of the TiO2–NiO heterostructures. TiO2–NiO heterostructures annealed at 350 °C comprised NiO-nanosheet-decorated TiO2 nanostructures (NST), whereas those annealed at 500 °C comprised NiO-nanoparticle-decorated TiO2 nanostructures (NPT). The NPT exhibited higher photodegradation activity than the NST in terms of methylene blue (MB) degradation under irradiation. Structural analyses demonstrated that the NPT had a higher surface adsorption capability for MB dyes and superior light-harvesting ability; thus, they exhibited greater photodegradation ability toward MB dyes. In addition, the NST showed high gas-sensing responses compared with the NPT when exposed to acetone vapor. This result was attributable to the higher number of oxygen-deficient regions on the surfaces of the NST, which increased the amount of surface-chemisorbed oxygen species. This resulted in a relatively large resistance variation for the NST when exposed to acetone vapor.
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22
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Mo Y, Shi F, Qin S, Tang P, Feng Y, Zhao Y, Li D. Facile Fabrication of Mesoporous Hierarchical Co-Doped ZnO for Highly Sensitive Ethanol Detection. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00158] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yufan Mo
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Feng Shi
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Shuaiwei Qin
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Pinggui Tang
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Yongjun Feng
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Yingying Zhao
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Dianqing Li
- State Key Laboratory of Chemical Resource Engineering and Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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23
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Nasiri N, Clarke C. Nanostructured Chemiresistive Gas Sensors for Medical Applications. SENSORS 2019; 19:s19030462. [PMID: 30678070 PMCID: PMC6387115 DOI: 10.3390/s19030462] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/17/2019] [Accepted: 01/21/2019] [Indexed: 01/04/2023]
Abstract
Treating diseases at their earliest stages significantly increases the chance of survival while decreasing the cost of treatment. Therefore, compared to traditional blood testing methods it is the goal of medical diagnostics to deliver a technique that can rapidly predict and if required non-invasively monitor illnesses such as lung cancer, diabetes, melanoma and breast cancer at their very earliest stages, when the chance of recovery is significantly higher. To date human breath analysis is a promising candidate for fulfilling this need. Here, we highlight the latest key achievements on nanostructured chemiresistive sensors for disease diagnosis by human breath with focus on the multi-scale engineering of both composition and nano-micro scale morphology. We critically assess and compare state-of-the-art devices with the intention to provide direction for the next generation of chemiresistive nanostructured sensors.
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Affiliation(s)
- Noushin Nasiri
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia.
| | - Christian Clarke
- Institute for Biomedical Materials and Devices, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
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24
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Majhi SM, Lee HJ, Choi HN, Cho HY, Kim JS, Lee CR, Yu YT. Construction of novel hybrid PdO–ZnO p–n heterojunction nanostructures as a high-response sensor for acetaldehyde gas. CrystEngComm 2019. [DOI: 10.1039/c9ce00710e] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile and unique approach to design PdO@ZnO p–n heterojunction nanostructures (NSs) as a highly sensitive and selective acetaldehyde gas sensor.
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Affiliation(s)
- Sanjit Manohar Majhi
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
| | - Hu-Jun Lee
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
| | - Ha-Nui Choi
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
| | - Ha-Young Cho
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
| | - Jin-Soo Kim
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
| | - Cheul-Ro Lee
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
| | - Yeon-Tae Yu
- Division of Advanced Materials Engineering and Research Center for Advanced Materials Development
- College of Engineering
- Chonbuk National University
- Jeonju
- South Korea
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25
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Neelakanta Reddy I, Venkata Reddy C, Sreedhar A, Shim J, Cho M, Yoo K, Kim D. Structural, optical, and bifunctional applications: Supercapacitor and photoelectrochemical water splitting of Ni-doped ZnO nanostructures. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.09.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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26
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Yu X, Lin X, Feng W, Li W. Effective Removal of Tetracycline by Using Bio-Templated Synthesis of TiO2/Fe3O4 Heterojunctions as a UV–Fenton Catalyst. Catal Letters 2018. [DOI: 10.1007/s10562-018-2544-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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27
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Liu N, Li T, Yu H, Xia L. Fabrication of a Disordered Mesoporous ZnO Matrix Modified by CuO Film as High‐Performance NO
x
Sensor. ChemistrySelect 2018. [DOI: 10.1002/slct.201800429] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ning Liu
- School of Chemistry & Environmental EngineeringChangchun University of Science and Technology Changchun 130022, P. R. China
| | - Tian‐tian Li
- School of Chemistry & Environmental EngineeringChangchun University of Science and Technology Changchun 130022, P. R. China
| | - Hui Yu
- School of Chemistry & Environmental EngineeringChangchun University of Science and Technology Changchun 130022, P. R. China
| | - Long Xia
- School of Materials Science and EngineeringHarbin Institute of Technology at Weihai Weihai 264209, P. R. China
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28
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Sett A, Das D, Banerjee D, Ghorai UK, Das NS, Das B, Chattopadhyay KK. 1D-2D hybrids as efficient optoelectronic materials: a study on graphitic carbon nitride nanosheets wrapped with zinc oxide rods. Dalton Trans 2018; 47:4501-4507. [PMID: 29505061 DOI: 10.1039/c8dt00016f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc oxide (ZnO) nanorods (NRs) wrapped with graphitic carbon nitride (GCN) nanosheet (NS) hybrids have been synthesized by a simple chemical process. The as-prepared samples are characterized by X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, Fourier transformed infrared spectroscopy, UV-Vis spectroscopy and photoluminescence spectroscopy. The images obtained from the transmission electron microscopic study and the existence of C-N stretching modes as observed from Fourier transform infrared spectroscopy confirm the successful attachment of GCN NSs onto the ZnO NRs. It is seen that hybrid samples show broad photoluminescence (PL) emission with enhanced defect related emission along with a quenching effect due to the charge transfer mechanism. The results have been explained by taking into consideration the three different types of electron transitions occurring within the type-II band structure of the hybrid samples. Moreover a study on the conductivity of the samples is carried out under dark conditions and also under ultraviolet (UV) light irradiation. It is observed that the hybrid samples show significantly improved conductivity under both dark and UV irradiated conditions. The absorbance of the samples in the UV range shows better conductivity under UV conditions as compared to dark conditions.
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Affiliation(s)
- A Sett
- School of Material Science and Nanotechnology, Jadavpur University, Kolkata 700032, India.
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29
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A review on chemiresistive room temperature gas sensors based on metal oxide nanostructures, graphene and 2D transition metal dichalcogenides. Mikrochim Acta 2018; 185:213. [DOI: 10.1007/s00604-018-2750-5] [Citation(s) in RCA: 300] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 02/26/2018] [Indexed: 02/08/2023]
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30
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Park JH, Yeo S, Kang TJ, Shin HR, Heo I, Chang TS. Effect of Zn promoter on catalytic activity and stability of Co/ZrO2 catalyst for dry reforming of CH4. J CO2 UTIL 2018. [DOI: 10.1016/j.jcou.2017.11.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Alam M, Asiri AM, Uddin MT, Islam MA, Rahman MM. Wet-chemically prepared low-dimensional ZnO/Al2O3/Cr2O3 nanoparticles for xanthine sensor development using an electrochemical method. RSC Adv 2018; 8:12562-12572. [PMID: 35541273 PMCID: PMC9079617 DOI: 10.1039/c8ra01734d] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 03/19/2018] [Indexed: 11/30/2022] Open
Abstract
A reliable xanthine (XNT) chemical sensor was fabricated using a facile wet-chemical method (by co-precipitation) to prepare ZnO/Al2O3/Cr2O3 nanoparticles (NPs) in an alkaline medium at low temperature. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible spectroscopy (UV-vis) were implemented for detailed characterization of the NPs. To fabricate the working electrode as a XNT chemical sensor probe, a glassy carbon electrode (GCE) with a 0.0316 cm2 surface area was coated with an ethanolic slurry of the prepared ZnO/Al2O3/Cr2O3 NPs to make a thin layer and used to analyse XNT in a phosphate buffer system. To evaluate the analytical performances of the XNT chemical sensor, the calibration curve of XNT was plotted as the relationship of current versus the concentration of XNT. The plotted calibration curve was found to be linear over the LDR (linear dynamic range) of 0.05 nM to 5.0 μM. The assembled XNT electrochemical sensor exhibited the highest sensitivity (70.8861 μA μM−1 cm−2), the lowest detection limit (1.34 ± 0.07 pM), good reproducibility performance with high accuracy and long-term stability with standard results under ambient conditions. This is a simple route to selectively detect XNT with wet-chemically prepared co-doped ZnO/Al2O3/Cr2O3 nanomaterials using a reliable electrochemical method at a large scale for safety within healthcare fields. This is a simple route to detect the selective xanthine with wet-chemically prepared co-doped ZnO/Al2O3/Cr2O3 nanomaterials by reliable electrochemical method at large scales for the safety of healthcare fields.![]()
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Affiliation(s)
- M. M. Alam
- Department of Chemical Engineering and Polymer Science
- Shahjalal University of Science and Technology
- Sylhet 3100
- Bangladesh
| | - Abdullah M. Asiri
- Chemistry Department
- King Abdulaziz University
- Faculty of Science
- Jeddah 21589
- Saudi Arabia
| | - M. T. Uddin
- Department of Chemical Engineering and Polymer Science
- Shahjalal University of Science and Technology
- Sylhet 3100
- Bangladesh
| | - M. A. Islam
- Department of Chemical Engineering and Polymer Science
- Shahjalal University of Science and Technology
- Sylhet 3100
- Bangladesh
| | - Mohammed M. Rahman
- Chemistry Department
- King Abdulaziz University
- Faculty of Science
- Jeddah 21589
- Saudi Arabia
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32
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Ilin AS, Ikim MI, Forsh PA, Belysheva TV, Martyshov MN, Kashkarov PK, Trakhtenberg LI. Green light activated hydrogen sensing of nanocrystalline composite ZnO-In 2O 3 films at room temperature. Sci Rep 2017; 7:12204. [PMID: 28939822 PMCID: PMC5610332 DOI: 10.1038/s41598-017-12547-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 09/11/2017] [Indexed: 11/09/2022] Open
Abstract
The possibility of reducing the operating temperature of H2 gas sensor based on ZnO-In2O3 down to room temperature under green illumination is shown. It is found that sensitivity of ZnO-In2O3 composite to H2 nonmonotonically depends on the oxides' content. The optimal ratio between the components is chosen. The new mechanism of nanocrystalline ZnO-In2O3 sensor sensitivity to H2 under illumination by green light is proposed. The mechanism considers the illumination turns the composite into nonequilibrium state and the photoconductivity change in the H2 atmosphere is linked with alteration of nonequilibrium charge carriers recombination rate.
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Affiliation(s)
- A S Ilin
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, 119991, Russia.
| | - M I Ikim
- Semenov Institute of Chemical Physics, Russian Academia of Sciences, 4, Kosygina Str., Moscow, 119991, Russia
| | - P A Forsh
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, 119991, Russia.,National Research Centre "Kurchatov Institute", 1, Akademika Kurchatova pl., Moscow, 123182, Russia
| | - T V Belysheva
- Semenov Institute of Chemical Physics, Russian Academia of Sciences, 4, Kosygina Str., Moscow, 119991, Russia
| | - M N Martyshov
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, 119991, Russia
| | - P K Kashkarov
- Physics Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, 119991, Russia.,National Research Centre "Kurchatov Institute", 1, Akademika Kurchatova pl., Moscow, 123182, Russia.,Moscow Institute of Physics and Technology (State University), 9, Institutskii per., Dolgoprudny, Moscow, Region, 141700, Russia
| | - L I Trakhtenberg
- Semenov Institute of Chemical Physics, Russian Academia of Sciences, 4, Kosygina Str., Moscow, 119991, Russia.,Moscow Institute of Physics and Technology (State University), 9, Institutskii per., Dolgoprudny, Moscow, Region, 141700, Russia
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33
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Xiong Y, Lu W, Ding D, Zhu L, Li X, Ling C, Xue Q. Enhanced Room Temperature Oxygen Sensing Properties of LaOCl-SnO 2 Hollow Spheres by UV Light Illumination. ACS Sens 2017; 2:679-686. [PMID: 28723168 DOI: 10.1021/acssensors.7b00129] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this paper, a facile and elegant Green Chemistry method for the synthesis of SnO2 based hollow spheres has been investigated. The influences of doping, crystallite morphology, and operating condition on the O2 sensing performances of SnO2 based hollow-sphere sensors were comprehensively studied. It was indicated that, compared with undoped SnO2, 10 at. % LaOCl-doped SnO2 possessed better O2 sensing characteristics owing to an increase of specific surface area and oxygen vacancy defect caused by LaOCl dopant. More importantly, it was found that O2 sensing properties of the 10 at. % LaOCl-SnO2 sensor were significantly improved by ultraviolet light illumination, which was suited for room-temperature O2 sensing applications. Besides, this sensor also had a better selectivity to O2 with respect to H2, CH4, NH3, and CO2. The remarkable increase of O2 sensing properties by UV light radiation can be explained in two ways. On one hand, UV light illumination promotes the generation of electron-hole pairs and oxygen adsorption, giving rise to high O2 response. On the other hand, UV light activates desorption of oxygen adsorbates when exposed to pure N2, contributing to rapid response/recovery speed. The results demonstrate a promising approach for room-temperature O2 detection.
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Affiliation(s)
- Ya Xiong
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
| | - Wenbo Lu
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
| | - Degong Ding
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
| | - Lei Zhu
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
| | - Xiaofang Li
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
| | - Cuicui Ling
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
| | - Qingzhong Xue
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum, Qingdao 266580, Shandong P. R. China
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34
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Liu H, Zhou Q, Zhang Q, Hong C, Xu L, Jin L, Chen W. Synthesis, Characterization and Enhanced Sensing Properties of a NiO/ZnO p-n Junctions Sensor for the SF₆ Decomposition Byproducts SO₂, SO₂F₂, and SOF₂. SENSORS 2017; 17:s17040913. [PMID: 28430121 PMCID: PMC5426837 DOI: 10.3390/s17040913] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Revised: 04/06/2017] [Accepted: 04/17/2017] [Indexed: 12/01/2022]
Abstract
The detection of partial discharge and analysis of the composition and content of sulfur hexafluoride SF6 gas components are important to evaluate the operating state and insulation level of gas-insulated switchgear (GIS) equipment. This paper reported a novel sensing material made of pure ZnO and NiO-decorated ZnO nanoflowers which were synthesized by a facile and environment friendly hydrothermal process for the detection of SF6 decomposition byproducts. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structural and morphological properties of the prepared gas-sensitive materials. Planar-type chemical gas sensors were fabricated and their gas sensing performances toward the SF6 decomposition byproducts SO2, SO2F2, and SOF2 were systemically investigated. Interestingly, the sensing behaviors of the fabricated ZnO nanoflowers-based sensor to SO2, SO2F2, and SOF2 gases can be obviously enhanced in terms of lower optimal operating temperature, higher gas response and shorter response-recovery time by introducing NiO. Finally, a possible gas sensing mechanism for the formation of the p–n junctions between NiO and ZnO is proposed to explain the enhanced gas response. All results demonstrate a promising approach to fabricate high-performance gas sensors to detect SF6 decomposition byproducts.
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Affiliation(s)
- Hongcheng Liu
- College of Engineering and Technology, Southwest University, Chongqing 400715, China.
| | - Qu Zhou
- College of Engineering and Technology, Southwest University, Chongqing 400715, China.
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China.
| | - Qingyan Zhang
- College of Engineering and Technology, Southwest University, Chongqing 400715, China.
| | - Changxiang Hong
- College of Engineering and Technology, Southwest University, Chongqing 400715, China.
| | - Lingna Xu
- College of Engineering and Technology, Southwest University, Chongqing 400715, China.
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China.
| | - Lingfeng Jin
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China.
| | - Weigen Chen
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China.
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Mohamed Reda G, Fan H, Tian H. Room-temperature solid state synthesis of Co 3 O 4 /ZnO p–n heterostructure and its photocatalytic activity. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2016.12.025] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Ma X, Zhou X, Gong Y, Han N, Liu H, Chen Y. MOF-derived hierarchical ZnO/ZnFe2O4 hollow cubes for enhanced acetone gas-sensing performance. RSC Adv 2017. [DOI: 10.1039/c7ra04437b] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and direct pyrolysis of FeIII modified IRMOF-3 is employed to synthesize ZnO/ZnFe2O4 hollow cubes for enhanced acetone gas sensing.
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Affiliation(s)
- Xiang Ma
- State Key Laboratory of Multiphase Complex System
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing
- China
| | - Xinyuan Zhou
- State Key Laboratory of Multiphase Complex System
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing
- China
| | - Yan Gong
- State Key Laboratory of Multiphase Complex System
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing
- China
| | - Ning Han
- State Key Laboratory of Multiphase Complex System
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing
- China
| | - Haidi Liu
- State Key Laboratory of Multiphase Complex System
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing
- China
| | - Yunfa Chen
- State Key Laboratory of Multiphase Complex System
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing
- China
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