Journal of Water Process Engineering
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2025
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IF 6.7
Linjun Wu,Huan Li,Yuexi Zhou,Zhiqiang Shen,Jiane Zuo
This research evaluated the efficacy of self-sustaining alkalinity driven gas permeable membrane (SSAD-GPM) in ammonia recovery under low-rate aeration. This research initially confirmed the role of HCO 3 − and CO 3 2− in enhancing alkalinity release and ammonia conversion. It was determined that providing alkalinity through HCO 3 − necessitates the consumption of inorganic carbon (IC), and highlighting the criticality of maintaining a HCO 3 − /NH 4 + ratio exceeding 1.0 to optimize ammonia removal efficiency (>90.5 %). Alkalinity via CO 3 2− involves a two-stage hydrolysis process, consuming IC only in the second phase. Then, comparing SSAD-GPM with alkalinity addition driven GPM (AAD-GPM) for real anaerobic digestate treatment, SSAD-GPM demonstrated an initial ammonia removal efficiency of 99.1 %, which reduced to 82.8 % after 40 days of operation. In contrast, the efficiency of AAD-GPM decreased to 62.6 %. Superior anti-fouling performance of SSAD-GPM, due to aeration-induced turbulence, mitigated concentration polarization and fouling. Efficiency was restored to 98.1 % post-cleaning with tap water. Lastly, this research assessed the alkalinity consumption and cost of various ammonia removal/recovery strategies, demonstrating that SSAD-GPM can substantially lower operating costs, yielding a net profit of $0.081/kg N. These findings underscore the potential of SSAD-GPM as a cost-effective approach for treating high ammonia‑nitrogen wastewater with sufficient self-sustaining alkalinity (HCO 3 − /NH 4 + > 1.0).
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Yongjiao Sun,Jun Li,Yuchen Hou,Bingliang Wang,Wendong Zhang,Koichi Suematsu,Lin Chen,Jie Hu
Electrically conductive metal-organic frameworks (EC-MOFs) exhibit significant potential application as sensing materials for chemical resistance gas sensors. Herein, we developed a flexible gas sensor based on Ni 3 (HITP) 2 nanosheets co-functionalized with noble metal nanoparticles (NPs) and WS 2 quantum dots (QDs) for NO 2 detection at room temperature. The gas sensing performance was regulated by optimizing the metal species and loading ratios of WS 2 QDs. The measured results revealed that Au NPs and 2 mol% WS 2 achieved the most effective enhancement for NO 2 sensing performance. Therefore, Au NPs was selected to optimize WS 2 -2/Ni 3 (HITP) 2 sensor for further improving the sensing properties. A unique hierarchical structure based on gas sensor (Au 3 @WS 2 -2/Ni 3 (HITP) 2 sensor) enables high response (14.73 % to 5 ppm NO 2 ), rapid response/recovery time (97 s/110 s), good selectivity, anti-humidity, repeatability, long-term stability as well as flexibility at room temperature. Furthermore, density functional theory (DFT) and band theory were employed to comprehend adsorption energies and the electronic structures at atomic scale, elucidating the intrinsic correlation between NO 2 adsorption behavior and Ni 3 (HITP) 2 surface and the sensitization mechanism of heterostructures. These findings provide novel insights for designing high-performance NO 2 gas sensors worked at room temperature and guidance for EC-MOFs sensing mechanism.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Wanzhihan Zhang,Xiaohui Zhao,Ye Guo,Yong Wang,Ling Li,Youwei Zhao,Yucang Zhang,Wenming Zhang
In recent years, with the rapid development of technologies and industries such as new energy, novel sensing, flexible electronics, and wearable devices, there is an urgent need to develop nanomaterials with enhanced properties to meet the increasingly stringent functional requirements in energy storage and multifunctional sensing applications. Herein, a preparation strategy is proposed using poly(dopamine)-coated FeVO 4 nanoparticles as the exclusive electrode material, following the concept of integrating sensing and energy storage. Within this innovative framework, the polydopamine coating enhances the electrical conductivity and increases the specific surface area, resulting in an area capacitance of 308 mF cm −2 . This study demonstrates not only the practical application of this composite material in gas sensing technology, which contributes to the accurate detection of ethanol and ammonia concentrations in the range of 1 to 100 ppm, but also the development of full-band visible light photoelectric sensors with a rapid response time of 4.5 s using carbon cloth. Additionally, self-supporting MXene membranes prepared by vacuum filtration and screen-printed electrode materials were used to develop pressure sensors with excellent permeability and a wide detection range of 1 kPa to 100 kPa, which are used to realize applications such as pulse detection, joint motion detection, sound detection, and information transmission. The data information is protected using chaotic encryption algorithms through a combination of pressure sensors and cloud-based technology, thus ensuring secure data transmission. This work demonstrates that composite materials exhibit great potential for multifunctional sensing as well as supercapacitors, and provides innovative ideas and technical support for the development of a new generation of smart systems.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Jun Zhao,Rufang Peng
Here, we demonstrated the continuous synthesis of metal–organic frameworks (MOFs) (ZnBTeC/MnBTeC/Ni4[(phen)2(BeTC)]/Co4[(phen)2(BeTC)]) by using a brand new device—gas–solid two-phase flow synthesis equipment. Quantitative conversions occurred to give products at 60 kg h–1 rates. The single-crystal X-ray diffraction validated the precise structure of these MOFs. Also, it should be noted that the reactions were performed under completely solvent-free conditions. In addition, kinetic analysis was carried out to study the reaction mechanisms.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Jun Wang,Le Wang,Jiuyun Zhang,Zhixuan Wang,Yitao Liu,Wei Cai,Bin Fei,Renming Pan,Xia Zhou
The explosion characteristics of gases generated from the overcharged thermal runaway (TR) process of NCM pouch cell were investigated. Specially, the gases mainly include H 2 , CH 4 , C 2 H 4 , C 2 H 6 , C 3 H 6 , and CO, and its maximum explosion pressure (MEP) concentration is 25% (volume ratio). The lower explosion limit of TR gas is 11.15%, and the upper explosion limit is 36.875%. To reduce the risk of an explosion from the TR gas, a unique aerosol explosion suppression agent (ASA) was prepared using simple three-component raw materials and a freeze-drying process. For the TR gas explosion at MEP concentration, the ASA-0.3 g can decrease MEP by 74.64% and maximum explosion pressure rate (MPR) by 97.67%. The ASA-0.5 g can completely inhibit the explosion. The mixed gas was 5.3 L, so the explosion suppression concentration of ASA is 0.095 g·L -1 . It is found that ASA consists of a gas mixture of N 2 and CO 2 and solid reactive particle (SRP). The anhydrous SRP contains 33% nanoscale KHCO 3 particles with a particle size mainly range of 0.1–1 μm. And the D90 of SRP is about 0.63 μm. The minimum extinguishing concentration of ASA is from 30 to 40 g·m -3 . Additionally, typical radiation spectra of potassium ions are found during the explosion suppression process, which indicates that potassium ions in SRP are involved in the reaction of ASA and TR gas during the explosion suppression process. Therefore, ASA can efficiently suppress the explosion of TR gas through its chemical inhibition mechanism, primarily by terminating free radical chain reactions.
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Frontiers of Chemical Science and Engineering
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2024
·Vol. 18
·期 12
·1-9
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IF 4.3
Xu Yang,Guo Xuan,Wang Meng,Fang Yunming
The characterization of bio-aviation fuel composition is paramount for assessing biomass conversion processes and its suitability to meet international standards. Compared with one-dimensional gas chromatography mass spectrometry (1DGC-MS), comprehensive two-dimensional gas chromatography with mass spectrometry (GC × GC-MS) emerges as a promising analytical approach for bio-aviation fuel, offering enhanced separation, resolution, selectivity, and sensitivity. This study addresses the qualitative and quantitative analysis methods for both bulk components and trace fatty acid methyl ester (FAME) in bio-aviation fuel obtained by hydrogenation at 400 °C with Ni-Mo/ γ -Al 2 O 3 &Meso-SAPO-11 as catalyst using GC × GC-MS. In bulk composition analysis, C 12 concentration was highest at 25.597%. Based on GC × GC-MS analysis platform, the quality control method of FAME in bio-aviation fuel was established. At the split ratio of 10:1, limits of detections of six FAMEs were 0.011–0.027 mg·kg −1 , and limits of quantifications were 0.036–0.090 mg·kg −1 , and the GC × GC-MS research platform had the ability to detect FAME from 2 to 5 mg·kg −1 . The results showed that this bioaviation fuel did not contain FAME.
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JOURNAL OF SEPARATION SCIENCE
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2020
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IF 2.878
Yu Xu,Zhongning Yu,Xiaobin Chen,Yi Zhou,Kang Zhou,Zhuomin Zhang,Gongke Li
Halitosis with the main components of trace volatile sulfur compounds widely affects the quality of life. In this study, an adaptable active sampling system with two sample-collection modes of direct injection and solid-phase microextraction was developed for the rapid and precise determination of trace volatile sulfur compounds in human halitosis coupled with gas chromatography–flame photometric detection. The active sampling system was well designed and produced for efficiently sampling and precisely determining trace volatile targets in halitosis under the optimized sampling and detection conditions. The analytical method established was successfully applied for the determination of trace targets in halitosis. The limits of detection of H 2 S, CH 3 SH, and CH 3 SCH 3 by direct injection were 0.0140–23.0 μg/L with good recoveries ranging from 82.2 to 118% and satisfactory relative standard deviations of 0.4–9.5% ( n = 3), respectively. The limit of detections of CH 3 SH and CH 3 SCH 3 by solid-phase microextraction were 2.03 and 0.186 × 10 −3 μg/L with good recoveries ranging from 98.3 to 108% and relative standard deviations of 5.9–9.0% ( n = 3). Trace volatile targets in positive real samples could be actually found and quantified by combination of direct injection and solid-phase microextraction. This method was reliable and efficient for the determination of trace volatile sulfur compounds in halitosis.
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iScience
·
2023
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IF 5.8
Junxiong Zhao,Yan Yang,Huirui Li,Shengchao Xu,Qifeng Wei,Xiulian Ren
The impact of ship emissions on the environment cannot be ignored and should be controlled. The possibility of applying seawater electrolysis technology and a novel amide absorbent (BAD, C 12 H 25 NO) to the simultaneous desulfurization and denitrification of ship exhaust gas is entirely confirmed by using various seawater resources. Concentrated seawater (CSW) with high salinity can effectively reduce the heat generated during electrolysis and the escape of chlorine. The initial pH of the absorbent can greatly affect the NO removal capacity of the system, and the BAD could keep the pH range suitable for NO oxidation in the system for a long time. The use of fresh seawater (FSW) to dilute the electrolysis of concentrated seawater (ECSW) to make an aqueous oxidant is a more reasonable scheme; the average removal efficiencies of SO 2 , NO, and NOx were 97.10%, 75.41%, and 74.28%, respectively. The synergistic effect of HCO 3 − /CO 3 2− and BAD was shown to further restrict NO 2 escape.
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Frontiers in Chemical Engineering
·
2022
·
IF 0
Thijs Barbara,Hanssens Lucas,Heremans Gino,Wangermez Wauter,Rongé Jan,Martens Johan A.
A three compartment solar formic acid generator was built using a Sn on Cu foam cathode and NiFe anode. A bipolar combination of a Fumasep FAD-PET-75 and Nafion 117 membrane was mounted between anode and middle compartment, which was filled with Amberlyst 15H ion exchanger beads. A Fumasep FAD-PET-75 membrane separated the middle compartment from the cathode. The generator was powered with a photovoltaic panel and fed with gaseous CO2 and water. Diluted formic acid solution was produced by flowing water through the middle compartment. Common PV-EC devices are operated using aqueous electrolyte and produce aqueous formate. In our PV-EC device, formic acid is produced straight away, avoiding the need for downstream operations to convert formate to formic acid. The electrolyser was matched with solar photovoltaic cells achieving a coupling efficiency as high as 95%. Our device produces formic acid at a faradaic efficiency of ca. 31% and solar-to-formic acid efficiency of ca. 2%. By producing formic acid from CO2 and water without any need of additional chemicals this electrolyser concept is attractive for use at remote locations with abundant solar energy. Formic acid serves as a liquid renewable fuel or chemical building block.
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JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Xiaogang Lu,Xiaxia Zhu,Runli Gao,Hui Tang,Chengxin Pei,Hongmei Wang,Junhua Xiao
A route determination strategy through non-targeted screening of chemical attribution signatures was developed to identify tabun samples from three different synthetic routes. The CAS profiles of tabun samples were obtained by comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometer (GC×GC-TOFMS). The structures of 109 CAS were identified by NIST library and mass spectrometry fragment analysis. A few identified compounds could be traced to impurities in precursor compounds used in tabun synthesis. Based on the gas chromatography/mass spectrometry peak data of the selected CAS, partial least squares-discriminant analysis (PLS-DA) was used to extract the chemical attribution signatures of the characteristic compounds. The trained PLS-DA model performed well, with the lowest specificity and sensitivity values of 1.000 and 0.882, respectively. The performance of the PLS-DA model was further verified by unknown sample test set. The model demonstrated its ability to differentiate all the unknown tabun samples. The stability of chemical attribution signatures from different time periods was also investigated, and was further evaluated.
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FOOD RESEARCH INTERNATIONAL
·
2019
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IF 3.579
Chaojun He,Ziyong Li,Hongxia Liu,Haining Zhang,Liye Wang,Hong Chen
The aroma profile of Semnostachya menglaensis Tsui ( S. menglaensis ) was identified by headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-olfactometry (GC-O) and gas chromatography–mass spectrometry (GC–MS). A total of 29 odor-active compounds, which have aroma intensities ranging from 0.2 ± 0.5 to 10.0 ± 0.0 were detected by GC-O, whereas 14 compounds were detected as important odorants by quantitative analysis and odor activity values (OAVs). An aroma recombination model prepared by mixing 12 odor-active compounds with OAVs ≥ 1 in an “aroma-free” S. menglaensis matrix showed good similarity to the aroma of original S. menglaensis. Omission tests showed that in the overall aroma of S. menglaensis , 2-propionyl-3,4,5,6-tetrahydropyridine, 2-propionyl-1-pyrroline, 1-octen-3-ol, and linalool were the key odorants, and 2-acetyl-3,4,5,6-tetrahydropyridine, 2-propionylpyridine, and α-ionone were also important.
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LANGMUIR
·
2018
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IF 3.789
Zequn Yang,Hailong Li,Shihao Feng,Pu Li,Chen Liao,Xi Liu,Jiexia Zhao,Jianping Yang,Po-Heng Lee,Kaimin Shih
Nanostructured copper sulfide synthesized with the assistance of surfactant with nanoscale particle size and high Brunauer–Emmett–Teller surface area was for the first time applied for the capture of elemental mercury (Hg0) from coal combustion flue gas. The optimal operation temperature of nano-CuS for Hg0 adsorption is 75 °C, which indicates that injection of the sorbent between the wet flue gas desulfurization and the wet electrostatic precipitator systems is feasible. This assures that the sorbent is free of the adverse influence of nitrogen oxides. Oxygen (O2) and sulfur dioxide exerted a slight influence on Hg0 adsorption over the nano-CuS. Water vapor was shown to moderately suppress Hg0 capture efficiency via competitive adsorption. The simulated adsorption capacities of nano-CuS for Hg0 under pure nitrogen (N2), N2 + 4% O2, and simulated flue gas reached 122.40, 112.06, and 89.43 mgHg0/g nano-CuS, respectively. Compared to those of traditional commercial activated carbons and metal sulfides, the simulated adsorption capacities of Hg0 over the nano-CuS are at least an order of magnitude higher. Moreover, with only 5 mg loaded in a fixed-bed reactor, the Hg0 adsorption rate reached 11.93–13.56 μg/g min over nano-CuS. This extremely speedy rate makes nano-CuS promising for a future sorbent injection technique. The anisotropic growth of nano-CuS was confirmed by X-ray diffraction analysis and provided a fundamental aspect for nano-CuS surface reconstruction and polysulfide formation. Further X-ray photoelectron spectroscopy and Hg0 temperature-programmed desorption tests showed that the active polysulfide, S–S dimers, and copper-terminated sites contributed primarily to the extremely high Hg0 adsorption capacity and rate. With these advantages, nano-CuS appears to be a highly promising alternative to traditional sorbents for Hg0 capture from coal combustion flue gas.
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