Article
Chemistry, Analytical
E. Spagnoli, S. Krik, B. Fabbri, M. Valt, M. Ardit, A. Gaiardo, L. Vanzetti, M. Della Ciana, V Cristino, G. Vola, S. Caramori, C. Malagu, V Guidi
Summary: Tungsten oxide nanoflake powders were synthesized using solvothermal technique for ethanol sensing, showing good response to ethanol compared to other alcohols due to an interplay between the catalytic properties of the sensing film and gas diffusivity in a porous medium.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Shirui Luo, Renjie Chen, Jing Wang, Lan Xiang
Summary: In this study, a ZnO/Pd@ZIF-7 core-shell structure-based gas sensor was fabricated using a self-sacrificial method, which significantly improved the sensing selectivity of methane by utilizing the ZIF-7 filter. At low temperatures, ZIF-7 enriched gases and enhanced the response of methane, carbon monoxide, and ammonia. At elevated temperatures, ZIF-7 separated gases based on their molecular polarity, hindering the diffusion of polar carbon monoxide and ammonia more than nonpolar methane. This study not only provides a possible solution for enhancing the selectivity of metal oxide semiconductor (MOS) sensors to methane but also inspires the development of highly selective gas sensors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Ning Lu, Shurui Fan, Yaxu Zhao, Boxuan Yang, Zhongqiu Hua, Yi Wu
Summary: In this work, a selective methane gas sensor was developed based on In2O3 with catalytic films of Pt-TiO2, Pt-CeO2, and Pt-ZrO2 to enhance the sensor's selective response to methane. This design effectively eliminated interference from VOCs, NO2, and CO, showing high selectivity even in the presence of these interfering gases. The study confirmed that the sensing mechanism between Pd-In2O3 and the sensor-printed catalytic films remained consistent, following the general model with MOS sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Environmental
Joseph Calverley, William B. Zimmerman, David J. Leak, H. C. Hemaka Bandulasena
Summary: The study demonstrates the potential of hot microbubble stripping to continuously remove ethanol from dilute mixtures and maintain ethanol concentration below inhibitory levels, facilitating energy-efficient bioethanol production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Jifeng Pang, Ming Yin, Pengfei Wu, Xianquan Li, Haoyu Li, Mingyuan Zheng, Tao Zhang
Summary: The rapid growth of ethanol production and limited blending ratio in gasoline have led to the conversion of ethanol into value-added chemicals and fuels. Dehydrogenation of ethanol to acetaldehyde is a promising option due to the versatility of acetaldehyde and the high atomic economy of the process. This review summarizes the recent progress in catalytic conversion of ethanol to acetaldehyde, focusing on representative catalysts and reaction mechanisms. Challenges in improving acetaldehyde selectivity and catalyst stability, as well as opportunities in replacing fossil route acetaldehyde production, are also discussed.
Article
Engineering, Environmental
Xin Wang, Jihang Hu, Hao Guan, Xinjian Dai, Mingyue Wu, Xiaoqing Wang
Summary: This study developed a high-efficiency wood-based catalytic filter for continuous and highly efficient degradation of methylene blue in organic wastewater. The filter utilizes the liquid transport channels of natural wood and the catalytic activity of metal-organic frameworks to achieve high removal efficiency and water flux. It holds great promise for practical wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Chemistry, Applied
Shilin Zhao, Junlin Peng, Runqi Ge, Siyu Wu, Kehui Zeng, Huajun Huang, Kaibo Yang, Zhiqiang Sun
Summary: This study comprehensively discusses SCR catalysts with different supports, including their preparation method, composition, deNOx ability, etc. The findings show that metal-based SCR catalysts have good performance in both high and low-temperature deNOx, carbon material as a carrier can enhance deNOx ability, and minerals-based SCR catalysts have good deNOx capacity at medium to low temperature. The good distribution of active elements, chemical adsorption, acid sites, and surface pore structure are crucial for the deNOx ability of catalysts.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Christian Dannesboe, John Bogild Hansen, Ib Johannsen
Summary: In the transition towards renewable energy sources globally, full carbon utilization of renewable biomass is crucial for carbon neutrality. Stringent removal of sulfur contaminants in raw biogas is essential to enable integration of a biogas reactor, an electrolysis unit, and a catalytic methanation reactor.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Energy & Fuels
Mingqiang Chen, Wei Dai, Yishuang Wang, Zhiyuan Tang, Hong Li, Chang Li, Zhonglian Yang, Jun Wang
Summary: In this study, a series of Mn-Mo/SEP catalysts with different Mn/Mo ratios were prepared and applied to the catalytic depolymerization of lignin in supercritical ethanol systems. The results showed that the Mn/Mo ratios could regulate the catalyst performance and affect the yield and selectivity of the products. Among the catalysts tested, 3Mn1Mo/SEP exhibited excellent catalytic performance with high lignin yield and selectivity to phenols.
Article
Chemistry, Multidisciplinary
Xin-Yu Huang, Ya-Ru Kang, Shu Yan, Ahmed Elmarakbi, Yong-Qing Fu, Wan-Feng Xie
Summary: Metal-organic framework (MOF)-derived trimetallic FeCoNi oxides (FCN-MOS) with a mesoporous structure were synthesized through one-step hydrothermal reaction and calcination. The FCN-MOS system consists of three main phases, alpha-Fe2O3 (n-type), CoFe2O4, and NiFe2O4 (p-type), and the nanostructure and pore size can be controlled by altering the content of alpha-Fe2O3, CoFe2O4, and NiFe2O4. The sensors based on FCN-MOS exhibit a high response of 71.9, good selectivity towards 100 ppm ethanol at 250 degrees C, and long-term stability up to 60 days. Additionally, the FCN-MOS-based sensors show a p-n transition gas sensing behavior with the alteration of the Fe/Co/Ni ratio.
Article
Materials Science, Multidisciplinary
Fei Li, Qian Lv, Lun Gao, Xing Zhong, Jing Zhou, Xiaoxin Gao
Summary: Ag-LaFeO3, prepared by chemical reduction method, demonstrates excellent gas-sensing properties towards ethanol, with a higher gas response compared to LaFeO3 sensor, and short response and recovery times.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Jingyu Zhang, Meng Kong, Kai Li, Xi Chen, Xin Li, Lu Yue, Xiuli Yang, Rongfeng Guan, Wenhui Zhang
Summary: Hierarchical S-doped In2O3 networks were synthesized with graphene oxide as a template and annealed. The effects of graphene oxide and annealing temperature on the morphology and phase of the samples were investigated. The hierarchical S-doped In2O3 networks consisted of nanosheets and microspheres assembled with nanowires and nanoparticles. The annealed hierarchical S-doped In2O3 networks at 500 degrees C showed the highest response (Ra/Rg) of 74.4 towards 50 ppm ethanol at 180 degrees C, which was approximately 2 times higher than that of S-doped In2O3 micro pompons prepared without graphene oxide. Moreover, the hierarchical In2O3 networks exhibited excellent selectivity and good stability to ethanol, which may be attributed to their unique hierarchical networks, high specific surface area (295.23 m2/g), and sulfur doping.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Mehdi Shoorangiz, Leila Shariatifard, Hossein Roshan, Ali Mirzaei
Summary: In this study, p-type alpha-Fe2O3 nanoparticles were synthesized and used for gas sensing studies. The gas sensor showed a p-type semiconducting behavior and good selectivity towards ethanol vapor at an optimized sensing temperature of 150 degrees C, with a response of 14.5% to 100 ppm ethanol gas. The sensing mechanism was discussed in details.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Gang Li, Yuanyi Zhang, Qingfei Liang, Jinniu Zhang, Jia Liu, Yumeng Liu, Chunlan Wang, Jianzhi Gao, Hongbing Lu
Summary: In this study, Co3O4-TiO2 porous heterojunction nanosheets derived from BMOFs were constructed and used for ethanol sensing. The Co3O4-TiO2 nanosheets showed better sensing performances than TiO2 nanotablets, and the nanosheets with an optimal molar ratio of 12 mol% exhibited the highest response value and selectivity coefficient.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Qi Jin, Wei Wen, Shilie Zheng, Rui Jiang, Jin-Ming Wu
Summary: Nanostructure modulation is effective for high performance TiO2-based gas sensors. By using a wet-chemistry route to precipitate directly branched TiO2 nanowire arrays on alumina tubes, the sensors exhibit enhanced response due to the unique porous architecture and quasi-aligned nanostructure. The phase junctions between the backbone and branch of the branched TiO2 nanowire arrays help resistance modulation, leading to excellent sensor properties.
Article
Engineering, Environmental
Jan van den Broek, David Klein Cerrejon, Sotiris E. Pratsinis, Andreas T. Guentner
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Chemistry, Inorganic & Nuclear
Frank Krumeich, Sebastian Abegg, Andreas T. Guentner
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2020)
Article
Chemistry, Multidisciplinary
Sebastian Abegg, David Klein Cerrejon, Andreas T. Guntner, Sotiris E. Pratsinis
Article
Biochemical Research Methods
Karsten Konigstein, Sebastian Abegg, Andrea N. Schorn, Ines C. Weber, Nina Derron, Andreas Krebs, Philipp A. Gerber, Arno Schmidt-Trucksass, Andreas T. Guntner
Summary: In this study, exhaled breath acetone (BrAce) levels were measured in high and lower-fit individuals during submaximal aerobic exercise. The results showed that high-fit individuals had significantly higher BrAce levels during exercise and a higher increase rate in BrAce concentrations in the post-exercise phase compared to lower-fit individuals. This indicates a stronger exercise-related activation of fat metabolism in high-fit individuals.
JOURNAL OF BREATH RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Ines C. Weber, Hugo P. Braun, Frank Krumeich, Andreas T. Guntner, Sotiris E. Pratsinis
Article
Chemistry, Analytical
Jan van den Broek, Dario Bischof, Nina Derron, Sebastian Abegg, Philipp A. Gerber, Andreas T. Guentner, Sotiris E. Pratsinis
Summary: This newly developed low-cost, handheld breath detector can noninvasively and rapidly diagnose methanol poisoning, which is helpful for developing countries to deal with outbreaks caused by consumption of adulterated alcohol. The detector has been validated to accurately measure methanol concentrations in breath, demonstrating high diagnostic capability.
ANALYTICAL CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Andreas T. Guentner, Leandro Magro, Jan van den Broek, Sotiris E. Pratsinis
Summary: The COVID-19 pandemic has led to a surge in demand for hand sanitizers, but concerns over methanol adulteration have arisen. A newly developed device offers a fast and accurate way to detect methanol in sanitizers, meeting the urgent need for on-site screening by authorities, health professionals, and the general public. Testing has shown that the device is highly accurate and stable, with minimal interference from sanitizer composition and viscosity.
Article
Chemistry, Multidisciplinary
Liqun Kang, Bolun Wang, Andreas T. Guntner, Siyuan Xu, Xuhao Wan, Yiyun Liu, Sushila Marlow, Yifei Ren, Diego Gianolio, Chiu C. Tang, Vadim Murzin, Hiroyuki Asakura, Qian He, Shaoliang Guan, Juan J. Velasco-Velez, Sotiris E. Pratsinis, Yuzheng Guo, Feng Ryan Wang
Summary: In this study, a flow of electrons from metallic Cu to surface carbon species was observed, leading to the proposal of an electronic metal-support-carbon interaction model. This provides a comprehensive understanding of mass and electron flow, aiding in the prediction and improvement of catalytic performance in various chemical reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Ines C. Weber, Chang-ting Wang, Andreas T. Guntner
Summary: This study presents room-temperature catalytic filters for highly selective acetone sensing, successfully removing interferants without the need for additional heating. These filters are suitable for integration into mobile health care devices.
Article
Chemistry, Multidisciplinary
Andreas T. Guentner, Florian M. Schenk
Summary: Chemical reaction-mediated localized surface plasmon resonance with nanohybrids of Ag/AgOx on TiO2 enables highly selective formaldehyde sensing down to 5 ppb. The sensor works at room temperature and can be directly deposited onto flexible wristbands, allowing quantification of formaldehyde concentrations between 40-500 ppb using a smartphone camera.
Article
Chemistry, Multidisciplinary
Ines. C. Weber, Dina. N. Oosthuizen, Rawan. W. Mohammad, Chris. A. Mayhew, Sotiris. E. Pratsinis, Andreas. T. Guentner
Summary: Liver diseases cause millions of deaths each year, and the late diagnosis and insufficient screening techniques are contributing factors. Researchers have developed a compact and low-cost detector for noninvasive and selective detection of breath limonene, which is a promising biomarker for liver disease screening.
Article
Food Science & Technology
Nicolay J. Pineau, Leandro Magro, Jan van den Broek, Peter Anderhub, Andreas T. Guentner, Sotiris E. Pratsinis
Summary: A low-cost and hand-held detector was used to monitor methanol concentration during industrial distillation of various liquors, providing rapid, bias-free, and high precision quantification of individual methanol concentrations. It reliably recognized methanol levels above legal limits without interference from higher ethanol contents and aromas.
ACS FOOD SCIENCE & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Ines C. Weber, Nina Derron, Karsten Konigstein, Philipp A. Gerber, Andreas T. Guntner, Sotiris E. Pratsinis
Summary: Mobile health technologies offer new possibilities for managing metabolic diseases, with breath acetone monitoring showing potential for personalized treatments. A low-cost detector has been developed to accurately track lipolysis dynamics, suitable for metabolic assessment in various settings.
Review
Chemistry, Multidisciplinary
Jan van den Broek, Ines C. Weber, Andreas T. Guentner, Sotiris E. Pratsinis
Summary: Portable and inexpensive gas sensors are crucial for various applications such as non-invasive medical diagnostics, air quality monitoring, search & rescue, and food quality assessment. Selectivity in complex gas mixtures remains a major challenge, which can be overcome with the use of filters. Emphasis is placed on material engineering for targeted gas separation, portable device integration, and performance improvement in low-cost gas sensing systems for emerging applications.
MATERIALS HORIZONS
(2021)