CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Shilin Zhao,Yuxin Qian,Xinlin Wang,Lidong Wang,Zhiqiang Sun
Gaseous elemental mercury (Hg 0 ) from coal combustion poses severe environmental risks. Transition metal oxides are promising for Hg 0 removal, yet the role of active oxygen species remains unclear. This work systematically investigates the Hg 0 removal performance and mechanism of five transition metal oxides (Fe 2 O 3 , Fe 3 O 4 , MnO 2 , Mn 2 O 3 , Co 3 O 4 ) and their optimized binary transition metal oxides (Mn a Fe b O x ) prepared by mechanochemical method in N 2 + CO 2 and N 2 + O 2 + CO 2 atmospheres. The results indicate that the average Hg 0 removal efficiency under the two atmospheres follows the order of MnO 2 > Fe 2 O 3 > Co 3 O 4 > Mn 2 O 3 > Fe 3 O 4 , with oxidation escape being the primary Hg 0 removal way. The surface chemical active sites are the major factors influencing Hg 0 removal, where the initial content and consumption of oxygen vacancy are critical to their Hg 0 removal performance. MnO 2 and Fe 2 O 3 exhibit the highest Hg 0 adsorption energy and charge transfer quantity. Mechanochemically prepared Mn 3 Fe 2 O x exhibits the best Hg 0 removal performance, with 97.3% average Hg 0 removal efficiency under N 2 + O 2 + CO 2 atmosphere. Oxygen vacancy is the optimal Hg 0 adsorption active site on Fe 2 O 3 , Mn 2 O 3 , and Mn 3 Fe 2 O x , where Fe and Mn coordinate electron transfer through valence state conversion, forming Hg O and facilitating Hg 0 oxidation. The presence of O 2 replenishes the active oxygen species (lattice oxygen, adsorbed oxygen) on the surface, promoting Hg 0 adsorption by active oxygen, which thereby enhances the Hg 0 removal efficiency and Hg 0 adsorption rate. Identifying transition metal oxides with high oxygen vacancy content and ease consumption will help further improve their Hg 0 removal performance, which is vital for the development of metal oxide mercury removal adsorbents.
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SENSORS
·
2018
·Vol. 18
·期 9
·3113
·
IF 2.475
Zitao Liu,Tuoyu Yang,Ying Dong,Xiaohao Wang
Sensitive detection of volatile organic compounds (VOCs) is significant for environmental monitoring and medical applications. In this work, multi-walled carbon nanotubes (MWCNTs) and polyethylene glycol (PEG) that have good adsorption for VOCs, were sprayed layer by layer on an interdigitated electrode (IDE) to build a sensitive VOCs gas sensor. The relative resistance change (△R/R) when the sensor was exposed to VOCs was measured. The sensor showed high sensitivity to acetone, ethanol, isopropanol and isoprene with fast response (110 ± 5 s) and recovery (152 ± 5 s) at room temperature, and the lower detection limit (LDL) of the sensor reached 9 ppm. With the micro-fabricated IDE structure, the sensor can be easily built into an electric nose for VOC recognition and measurement.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Mingliang Liu,Bohao Liu,Yong Zhang
Metal oxide semiconductor (MOS)-based carbon monoxide (CO) gas sensors are confronted with the problem of poor response at low temperature (<100°C) due to the insufficient activation energy for the reaction between gas molecules and adsorbed oxygen. Inspired by the excellent catalytic ability of silver oxide (Ag 2 O) in the oxidation of CO to carbon dioxide (CO 2 ) at low temperature and the good conductivity of metallic Ag, Ag 2 O-based sensor was rationally designed for trace-level CO detection. The as-prepared CO sensor exhibited a detection range of 0–50 ppm with a low detection limit of 0.2 ppm at 80°C. Note that an abnormal decrease trend of resistance toward CO but increase trend of resistance toward other reducing gases (such as NH 3 , H 2 S and SO 2 , etc.) was observed in the as-prepared sensor, proving the good selectivity of CO toward other common reducing gases. The primary CO sensing mechanism of the transition of Ag element from the oxidation state to the metallic state was confirmed by the ex-situ X-ray photoelectron spectroscopy. This work confirms the influence of metal element’s oxidation/metallic states conversion on the gas sensing performances from the microscopic perspective, providing new ideas for the design of CO gas sensor working at low temperature.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.5
Jian He,Menghan Lu,Xinggang Wu,Haobo Gou,Ning Zhang,Zhiqiang Xu
The steel industry faces the dual pressures of carbon reduction and ultra-low emissions throughout production, making integrated CO2 capture and deep desulfurization of blast furnace gas essential. Conventional alcohol amine-based scrubbing agents have limitations such as low absorption capacity, regeneration difficulties, and high corrosivity. To address these issues, a CO2, COS (carbon oxysulfide), and H2S integrated high-efficiency removal biphasic absorbent was developed. The novel biphasic absorbent composed of sulfolane (SF), diethanolamine (DEA), 2-amino-2-methyl-1-propanol (AMP), piperazine (PZ), and H2O, achieved a removal rate of over 90% for CO2, COS, and H2S, under the tested conditions, while exhibiting low rich-phase viscosity and acceptable anti-corrosion performance. Optimal regeneration was attained at 110–120 °C, with regeneration efficiencies exceeding 85% and an estimated energy consumption of approximately 2.51 GJ per ton CO2 (about 33.9% lower than 30 wt% MEA), while exhibiting stable cyclic regeneration. Spectroscopic analyses (FTIR, 1H/13C NMR) indicate that H2S undergoes proton transfer to amine sites to form bisulfide containing quaternary ammonium salts, whereas CO2 and COS react with amine functionalities to yield carbamate and thiocarbamate species that preferentially partition into the aqueous-rich phase; sulfolane remains in the organic phase, enabling liquid–liquid separation. This research provides a promising basis for simultaneous pollution control and CO2 mitigation in the steel sector, aligning ultra-low emission targets with decarbonization efforts and offering potential environmental and economic benefits.
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RARE METALS
·
2026
·
IF 11
Hao Liang,Yu Liang,Rubiao Qiu,Kunpeng Duan,Jiaxiao Li,Yan Liu,Xiaowen Li,Li Wang,Lingling Liang,Mingyang Jiang,Chenxi Wang,Guojiang Chen,Ming Gao,Xiaojie Li,Tao Qin
en Periodontitis is a chronic infectious oral disease triggered by periodontopathogenic bacteria, resulting in the progressive inflammation and destruction of the tissues surrounding teeth. To achieve reprogramming of the infectious microenvironment for periodontitis therapy, a nanoformulation was proposed by loading polydopamine (PDA) with ultrasmall strontium through in situ reduction and arginine by Michael addition, defined as PA. Combined with near infrared (NIR) irradiation, it could efficiently scavenge reactive oxygen species (ROS), and downregulate inflammatory factors expression through inhibiting NF-κB pathway. In addition, it also confirmed the effective bacteria killing in NIR stimulated PA by photothermal effects and nitric oxide (NO) generation. Significantly, PA + NIR was also verified to promote alveolar bone tissue repair through strontium ions (Sr 2+ ) and NO induced angiogenesis, together with Sr 2+ mediated osteogenesis. The administration strategy was finally verified to alleviate the oxidative stress derived inflammation, suppress bacterial growth and biofilm formation, as well as promote bone regeneration with high efficacy and biosafety in the periodontitis rat models. All the above findings contributed to the NIR enhanced synergistic treatment of periodontitis, and it may serve as a promising strategy for the treatment of other inflammation related diseases. 摘要 zh 牙周炎是由牙周病原菌引发的慢性感染口腔疾病,导致牙齿周围组织形成炎症和发生损坏。为了重塑感染微环境实现牙周炎治疗,在聚多巴胺(PDA)通过原位还原负载超小锶,以及通过迈克尔加成负载精氨酸,得到一种纳米制剂,命名为为PA。结合近红外(NIR)照射,它能有效清除活性氧(ROS),以及通过抑制 NF-κB通路下调炎症因子表达。此外,还证实PA + NIR通过光热效应和一氧化氮(NO)生成有效杀灭细菌。更重要的是, PA + NIR 还通过锶离子(Sr 2+ )和NO诱导血管生成以及Sr 2+ 介导的促成骨,促进牙槽骨组织修复。最后证明该给药策略可减轻由氧化应激引起炎症,抑制细菌生长和生物膜形成,并促进骨再生。上述所有发现都有助于实现近红外增强牙周炎协同增效治疗,并可能为其他炎症相关疾病治疗提供有前景策略。
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Weicong Peng,Qing Zhong,Rui Zhang,Jingxian Zhang,Suiping Deng,Langhuan Huang,Shaozao Tan,Yongqiang Xiong
Conventional wound dressings exhibit limited functionality and bacterial-infected wounds may contribute to the development of drug resistance. Consequently, there is a critical demand for multifunctional nanocomposite hydrogels with enhanced antibacterial efficacy to facilitate rapid healing of infected wounds. Here, we developed a cascade reactor hydrogel (APT/OC) for releasing nitric oxide (NO) to achieve near-infrared (1064 nm) light-activated photothermal/photodynamic/gas synergistic therapy for drug-resistant bacteria-infected wounds. APT/OC hydrogel is prepared by inducing with polyphenolic amino acids and reversible crosslinking, using hyaluronic acid (HA), carboxymethyl chitosan (CMCS), L-arginine (L-Arg), polydopamine (PDA) and mesoporous titanium dioxide (m-TiO 2 ). In vitro and in vivo analyses revealed that the synergistic therapeutic effects triggered by near-infrared irradiation significantly inhibited the proliferation and biofilm formation of E. coli and MRSA ，and markedly accelerated the healing of drug-resistant wounds. Overall, the proposed hydrogel shows great potential in meeting the complex repair requirements arising from antibiotic-resistant bacterial infections of wounds.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·53492-53504
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IF 5.8
Tang Hao,Liu Xiaolong,Li Yiren,Tian Jinglei,Hou Changjiang,Tian Mengkui,Zhu Tingyu
Based on the unique technique property of grate–kiln pellet production process and its demand of ultra-low emission of NO x , a low energy-consumed embedded selective catalytic reduction (SCR) denitration technology was proposed. The temperature of the NO x -containing tributary flue gas was 350–500 °C, which basically accorded with the temperature range of SCR by V 2 O 5 -based catalyst. Considering the potential inhibition effect of high SO 2 concentration (8000–10000 mg/m 3 ) and metal-containing dust in the pelletizing flue gas, the catalyst compositions were optimized to V 2 O 5 (0.5%) and WO 3 (5%), giving NO conversion over 90% with low yield of N 2 O by-product. Compared with the low-medium temperature SCR technology, it was no longer necessary to reheat the flue gas, showing a remarkable CO 2 emission reduction effect. The CO 2 emission reduction ratios were 94% and 66% contributed by the decrease of fuel and electricity consumption for the embedded SCR technology, respectively. The operating cost was also greatly reduced from 11.4 CNY/t-pellet to 3.1 CNY/t-pellet (Chinese Yuan).
研究领域:
环境工程
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大气污染控制
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化学工程
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能源与环境科学
·
工业生态学
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Yujiao Cheng,Leng Han,Linhua Huang,Xiang Tan,Houjiu Wu,Guijie Li
Thermal pasteurization decreases the sensory quality of mandarin juice. Flavor composition was determined in four fresh-squeezed and heat-processed mandarin juice varieties using molecular sensory science approaches. The relationships between odorants and sensory profiles were analyzed, and markers for flavor deterioration were screened by multivariate statistical analysis. Seventy-four volatiles were identified, among which 36 odorants with flavor dilution factors ranging from 2 to 128 were detected by multidimensional gas chromatography-mass spectrometry/olfactometry (MDGC-MS/O) coupled with aroma extract dilution analysis (AEDA). Higher intensities of cooked and off-flavor notes were observed in the heated mandarin juice, which was related to the concentration changes of the methional, methanethiol, dimethyl sulfide, and carbon disulfide by partial least squares (PLS) analysis. Ten potential markers (methional, methanethiol, dimethyl sulfide, hydrogen sulfide, β -damascenone, camphene, trans - β -ionone, decanal, d -limonene, and α -pinene) were responsible for the sensory discrimination of fresh-squeezed and heated mandarin juices.
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JOURNAL OF POLYMER SCIENCE
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2023
·Vol. 61
·期 15
·1572-1583
·
IF 3.4
Bo Li,Juan Li,Shaowen Huang,Shuhao Qin,Nan Liu
Polylactic acid (PLA) packaging materials are useful, safe, and degradable in the natural environment, and hence, have attracted considerable interest. In particular, the barrier properties of PLA are the focus of current research. In this study, organic montmorillonite (OMMT) modified with an epoxy chain extender (CE) was prepared as a barrier functional additive for PLA and PLA alloy materials. The effects of the CE-OMMT on the properties of PLA and PLA/PHA (polyhydroxyalkanoates) composites were investigated. The CE-OMMT was characterized using Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and thermogravimetry (TG). The results showed that the CE-OMMT was successfully synthesized, and that the addition of the CE did not change the crystal structure of OMMT. The morphology and microstructure of the PLA/CE-OMMT and PLA/PHA/CE-OMMT composites were characterized using XRD and transmission electron microscopy (TEM). The dispersion of the CE-OMMT in the PLA and PLA/PHA composite films was significantly enhanced. XRD analysis showed that OMMT intercalated well into the matrix. The rheological, barrier, and mechanical properties of the PLA nanocomposite films were systematically studied. The results showed that the CE-OMMT enhanced the mechanical and barrier properties of the composite films. Compared with neat PLA, the elongation at break of the PLA/CE-OMMT and PLA/PHA/CE-OMMT composite films with the addition of 3% CE-OMMT increased by 449% and 788.4%, the oxygen permeability decreased by 57.74% and 59%, and the water vapor permeability decreased by 44.79% and 53.25%, respectively. Therefore, the modified PLA composite film is a promising substitute for packaging applications. Graphical
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Scientific Reports
·
2023
·Vol. 13
·期 1
·1-10
·
IF 4.6
Pang Honglei,Qiu Yayu,Sheng Weipeng
Hybrid polyvinylidene fluoride-silica-hexadecyltrimethoxysilane (PVDF-SiO 2 -HDTMS) membranes were fabricated via a non-solvent-induced phase-inversion method to create stable hollow-fiber membranes for use in the membrane contact absorption of carbon dioxide (CO 2 ). The surface properties, performance characteristics, and long-term performance stability of the prepared membranes were compared and analyzed. The outer surfaces of the prepared membranes were superhydrophobic because of the formation of rough nanoscale microstructures on the surfaces and their low surface free energy. The addition of inorganic nanoparticles improved the mechanical strength of the PVDF-SiO 2 -HDTMS. Long-term stable operation experiments were carried out with a mixed inlet gas (CO 2 /N 2 = 19/81, v/v) at a flow rate of 20 mL/min. The absorbent liquid in these experiments was 1 mol/L diethanolamine (DEA) at a flow rate of 50 mL/min. The mass transfer flux of CO 2 through the PVDF-SiO 2 -HDTMS membrane decreased from an initial value of 2.39 × 10 –3 mol/m 2 s to 2.31 × 10 –3 mol/m 2 s, a decrease of 3% after 20 days. The addition of highly stable and hydrophobic inorganic nanoparticles prevented pore wetting and structural damage to the membrane. The PVDF-SiO 2 -HDTMS membrane was found to have excellent long-term stable performance in absorbing CO 2 .
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ACS Omega
·
2022
·
IF 4.132
Qingmei Chen,Xiujun Peng,Jingwen Xue,Jinjin Li,Chunfeng Pan
Contamination is a leading cause of corrosion, foaming, and amine-absorption capacity limitation, predominantly foaming. There is currently an urgent need to identify the sources of amine foaming and eliminate them or reduce their impacts. Gas chromatography–mass spectrometry (GC-MS) and a sample pretreatment method were developed to identify and quantify the organic contaminants. Linear hydrocarbons (C12–C22), long-chain carboxylic acids and esters, alcohol ethoxylates, and benzene derivatives were detected, characterized, and quantified in amine solutions. Furthermore, the effects of the contaminant concentrations on foaming behavior were also investigated by adding those contaminants. The results reveal that the main issue of foaming is due to the presence of unsaturated fatty acids and alcohol ethoxylates, even with a small amount of 10 ppm, whereas benzene derivatives like methylpyridine, quinoline, methyl naphthalene, benzyl alcohol, octahydroacridine, and linear hydrocarbons have little effect on amine foaming, even with an amount up to 2000 ppm. Therefore, it is necessary to monitor the existence and content of these surface-active contaminants.
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Foods
·
2023
·Vol. 12
·期 3
·586
·
IF 5.2
Tao Sun,Junxia Bian,Yangyang Wang,Jian Hu,Xueyan Yun,Eerdunbayaer Chen,Tungalag Dong
Proper packaging can extend the shelf life and maintain the quality of mushrooms during storage. The purpose of this study is to investigate the preservation ofAgaricus bisporususing copolymer-modified poly (L-lactide-co-butylene fumarate) and poly (L-lactide-co-glycolic acid) (PLBF and PLGA) packaging. Shelf life and quality were evaluated over 15 days of storage ofAgaricus bisporusat 4 ± 1 °C and 90% relative humidity, including weight loss, browning index (BI), total phenolics (TP), ascorbic acid (AA), malondialdehyde content (MDA), electrolyte leakage rate (EC), and superoxide dismutase (SOD) and catalase (CAT). The results showed that mushrooms packaged in PLBF films exhibited better retention in BI, TP, and AA than those with PLLA, PLGA, or polyethylene (PE) films. They can reduce the rate of weight loss, EC, and MDA, which in turn increases the activity of SOD and CAT. PLBF and PLGA have substantially improved flexibility in comparison with PLLA. They also significantly reduced oxygen (O2) and carbon dioxide (CO2) permeability and changed the gas permeability ratio. These positive effects resulted in the effective restriction of O2and CO2in these packages, extending the post-harvest storage period of white mushrooms.Keywords:Agaricus bisporus;one-step synthesis;poly (L-lactic acid);soft packaging film;O2/CO2atmosphere;food shelf life
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