Enhanced SO2 sensing characteristics of multi-wall carbon nanotubes based mass-type sensor using two-step purification process

Publication date: Available online 24 June 2019Source: Sensors and Actuators A: PhysicalAuthor(s): Nguyen Duc Hoang, Vu Van Cat, Man Hoai Nam, Vu Ngoc Phan, Le Anh Tuan, Nguyen Van QuyAbstractIn this work, a room temperature gas sensor based on functional multi-wall carbon nanotubes (MWNTs) coated quartz crystal microbalance (QCM) was developed. The two-step purification process was used to remove amorphous carbon and inactivated catalyst particles, and added functional groups on the sidewall of tubes. The functional MWNTs were then dispersed in deionized water to deposit on the gold electrode of the QCM. The operative MWNTs-coated QCM sensor was tested with toxic hazardous gases such as hydrogen sulfide, hydrogen, nitrogen dioxide, carbon monoxide, and sulfur dioxide. The sensing results expose that the fabricated sensor exhibits good sensitivity with sulfur dioxide gas at room temperature. The sensitivity of the functional MWNTs based sensor presented to be superior to that of the as-grown MWNTs based sensor.Graphical abstract
Source: Sensors and Actuators A: Physical - Category: Physics Source Type: research

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Dalton Trans., 2019, Accepted Manuscript DOI: 10.1039/C9DT01774G, PaperKasala Prabhakar Reddy, Srikanth Dama, Nitin B Mhamane, Manoj Ghosalya, Raja Thirumalaiswamy, C. Satyanarayana, Gopinath S Chinnakonda Carbon dioxide is a greenhouse gas, needs to be converted into one of the useful feedstock, such as, carbon monoxide, methanol. We demonstrate the reduction of CO2 with H2, via... The content of this RSS Feed (c) The Royal Society of Chemistry
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Authors: Dawson RM, Williams AP, Richardson J Abstract Carbon monoxide (CO) poisoning is preventable yet remains the most common cause of U.S. non-drug poisoning. The purpose of this non-experimental study was to develop and evaluate the theory-based CO Blitz Model. Events targeted five SC communities; volunteers provided education while local firefighters installed CO alarms. At the 4-6-month follow-up evaluation, all homes still had a functioning CO alarm; most recipients could name CO sources in their homes (78%) and what to do if the alarm sounded (90%). The theory-driven process evaluation revealed the CO Blit...
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Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
ACS Applied Materials&InterfacesDOI: 10.1021/acsami.9b08408
Source: ACS Applied Materials and Interfaces - Category: Materials Science Authors: Source Type: research
AbstractPurposeTo evaluate alterations in pulmonary function indices after helical tomotherapy and explore potential associations with biologically corrected dosimetric parameters.Patients and methodsIn 64  patients with inoperable locally advanced non-small cell lung cancer, pulmonary function tests before and within 6 months after radiotherapy were evaluated retrospectively. In the case of concurrent chemotherapy a total dose of 67.2 Gy was delivered, otherwise 70.5 Gy was provided. In 44 pa tients, late pulmonary function changes (≥6 months after radiotherapy) could also be assessed.Resul...
Source: Strahlentherapie und Onkologie - Category: Cancer & Oncology Source Type: research
Authorities in Canada say a carbon monoxide leak at a hotel in Winnipeg, Manitoba has sent 46 people to the hospital, with at least 15 of them in critical condition. (July 9)   All contents © copyright 2019 The Associated Press. All rights reserved.
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The charge state of a molecule governs its physicochemical properties, such as conformation, reactivity, and aromaticity, with implications for on-surface synthesis, catalysis, photoconversion, and applications in molecular electronics. On insulating, multilayer sodium chloride (NaCl) films, we controlled the charge state of organic molecules and resolved their structures in neutral, cationic, anionic, and dianionic states by atomic force microscopy, obtaining atomic resolution and bond-order discrimination using carbon monoxide (CO)–functionalized tips. We detected changes in conformation, adsorption geometry, and b...
Source: ScienceNOW - Category: Science Authors: Tags: Chemistry reports Source Type: news
Publication date: Available online 9 July 2019Source: Journal of Alloys and CompoundsAuthor(s): Xi-Tao Yin, Wen-Dong Zhou, Jing Li, Qi Wang, Fa-Yu Wu, Davoud Dastan, Dong Wang, Hamid Garmestani, Xiang-Min Wang, Ştefan ŢăluAbstractUndecorated and Pt-decorated SnO2 nanoparticles (NPs) were prepared using sol-gel and hydrothermal methods. The tin dioxide NPs, as sensing materials, were screen printed on alumina substrates with Pt test electrode to fabricate the gas sensors. The characteristics of these gas sensors in terms of composition, morphology, and sensing property were investigated by means of X-ray diffraction (XRD...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
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Chem. Commun., 2019, Advance Article DOI: 10.1039/C9CC03909K, CommunicationChenxia Zhang, Hai Xie, Tongxia Zhan, Jie Zhang, Bochao Chen, Zhaosheng Qian, Guanglu Zhang, Weifen Zhang, Jin Zhou A red molecular probe for carbon monoxide (CO)-specific detection based on palladium-free mediated opening of spirolactam has been applied to establish a safe and powerful method to detect and image CO changes in biological systems. To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Chem. Commun. latest articles - Category: Chemistry Authors: Source Type: research
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