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Nugroho D, Wannakan K, Nanan S, Benchawattananon R. The Synthesis of carbon dots//zincoxide (CDs/ZnO-H400) by using hydrothermal methods for degradation of ofloxacin antibiotics and reactive red azo dye (RR141). Sci Rep 2024; 14:2455. [PMID: 38291079 PMCID: PMC10828376 DOI: 10.1038/s41598-024-53083-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 01/27/2024] [Indexed: 02/01/2024] Open
Abstract
The development of photocatalytic powders to remove contaminants from air solutions is an important field of research in the field of environmental conservation. CD/ZnO-H400, a heterogeneous photocatalytic production, is utilized to degrade the reactive red dye and the antibiotic ofloxacin found in wastewater. This study explains the synthesis of carbon dots (CDs) derived from coconut air and zinc oxide (ZnO) using a hydrothermal method at a temperature of 180 °C with a duration of 4 h and subsequently calcinated at a 400 °C temperature for 4 h. This shows a significant improvement in photocatalytic performance due to improved delivery efficiency at the interface. The cost-efficient use of solar energy allows the comprehensive elimination of harmful pollutants through detoxification. The removal of the contaminant takes place through the first-order reaction, with RR141 showing the highest constant rate at 0.03 min-1, while ofloxacin has a constant speed at 0.01 min-1. The photocatalytic stability is measured after five cycles. The study also tested the impact of sunlight on degradation, showing a degrading rate of 98% for RR141 and 96% for ofloxacin. This study displays a new catalyst powder synthesized from carbon dots derived from the air, coconut and ZnO, showing remarkable photoactivity to completely remove harmful dyes and antibiotics from the surrounding environment.
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Affiliation(s)
- David Nugroho
- Department of Integrated Science, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Khemika Wannakan
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Suwat Nanan
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
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Bhagat B, Gupta SK, Mandal D, Gor AA, Bandyopadhyay R, Mukherjee K. Probing the p-type Chemiresistive Response of NiFe 2 O 4 Nanoparticles for Potential Utilization as Ethanol Sensor. Chem Asian J 2024; 19:e202300841. [PMID: 38100152 DOI: 10.1002/asia.202300841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/20/2023] [Indexed: 01/24/2024]
Abstract
Detection of gas molecules and volatile organic compounds (VOCs) using efficient, low cost sensors has fetched significant attention in environmental monitoring, safety measures and medical diagnosis. In the present work, nickel ferrite (NFO) nanoparticles are explored as p-type semiconducting metal oxide (SMO) sensor for detection of five different organic vapors namely methanol, ethanol, n-propanol, iso-propanol and acetone which often cause severe damage to human body under prolonged exposure. The sensing studies in presence of the aforementioned five vapors are carried out by varying the sensor operating temperature (225-300 °C) and vapor concentrations (10-1000 ppm). Developed NFO sensor demonstrated best performance in terms of sensing (~10 ppm), response time (<10 s), excellent repeatability and selectivity towards ethanol among all other considered gas species. The repeatability of the sensor response is verified and the underlying reasons for the variation in the response of NFO sensor due to the change of operating temperature, analyte type and concentrations has been discussed. The synthesis of NFO through auto combustion method and study on their formation behaviour, oxygen vacancy evolution, band gap calculation, crystalline nature as well as microstructural features provides here the comprehensive information about the potential application of NFO nanoparticles as gas sensor.
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Affiliation(s)
- B Bhagat
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India
| | - Santosh K Gupta
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - D Mandal
- Institute of Nano Science and Technology, Mohali, India
| | - Abhishek A Gor
- Department of Physics, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India
| | - R Bandyopadhyay
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India
| | - K Mukherjee
- Department of Chemistry, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, 382426, Gujarat, India
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Ni L, Li X, Cai F, Dong Z, Deng Y, Jiang T, Su Z, Chang H, Zhang Z, Luo Y. Printable and Flexible Humidity Sensor Based on Graphene -Oxide-Supported MoTe 2 Nanosheets for Multifunctional Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1309. [PMID: 37110892 PMCID: PMC10142822 DOI: 10.3390/nano13081309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/02/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
This study focuses on a novel humidity sensor composed of graphene-oxide (GO)-supported MoTe2 nanosheets. Conductive Ag electrodes were formed on PET substrates by inkjet printing. A thin film of GO-MoTe2 was deposited on the Ag electrode used for adsorbing humidity. The experiment's results demonstrate that MoTe2 are attached to GO nanosheets uniformly and tightly. The capacitive output of the sensors with various ratios of GO/MoTe2 has been tested for different levels of humidity (11.3-97.3%RH) at room temperature (25 °C). As a consequence, the obtained hybrid film exhibits superior sensitivity (94.12 pF/%RH). The structural integrity and interaction of different components were discussed to afford the prominent humidity sensitivity performance. Under the bending condition, the output curve of the sensor has no obvious fluctuation. This work provides a low-cost way to build flexible humidity sensors with high-performance in environmental monitoring and healthcare.
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Affiliation(s)
- Lei Ni
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Xiaoyu Li
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Fangkai Cai
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Zhicheng Dong
- Engineering College of Tibet University, Lhasa 850011, China
| | - Yuhong Deng
- Sichuan Industial Metrology and Testing Institute, Chengdu 610100, China
| | - Tao Jiang
- Erzhong (Deyang) Heavy Equipment Co., Ltd., Detecting &Testing Center, Deyang 618000, China
| | - Zhengyang Su
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Hao Chang
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Zhongwen Zhang
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
| | - Yang Luo
- School of Network & Communication Engineering, Chengdu Technological University, Chengdu 611730, China
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Arvind Ahire S, Ashok Bachhav A, Bhavsing Pawar T, Sonu Jagdale B, Vitthal Patil A, Bhimrao Koli P. The augmentation of nanotechnology era: A concise review on fundamental concepts of nanotechnology and applications in material science and technology. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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