APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Chunling Li,Zhikun Wang,Wendong Wang,Huafeng Zhu,Shuangqing Sun,Songqing Hu
Synergism has developed to be an important means to improve the foaming, stabilizing and responsive deforming characteristics of foam. Here, CO 2 /N 2 responsive surfactants with tunable lengths of carbon chains are synthesized. Through forming and deforming testing, the obtained 11-dimethylamino-undecyl sulfate sodium (11-DUSNa) with 11 carbons on the linear tail chain has the best comprehensive performance. 11-DUSNa is then mixed with Cocamidopropyl Hydroxyl Sulfobetaine (CHSB) to produce a compound foam with enhanced temperature and salt tolerance. Experimental observations show that the compound foam has the largest stability by adding 3.2 mol/L divalent salts (Ca 2+ , Mg 2+ ), and has improved temperature resistance from 20 to 100 °C compared to singular surfactant foam. The compound foam defoams in response to the injection of CO 2 within 2200 s. The foaming and defoaming processes can be cycled many times by repeat addition of NaOH for deprotonation and CO 2 for protonation of amino groups. Molecular dynamics simulations show that Ca 2+ and Mg 2+ cations distributing around the head groups of surfactants form a stable network liquid film wall, explaining why the compound foam is salt tolerant. The synergistic effect of CHSB and anions increases the liquid film wall thickness and therefore leads to better temperature resistance.
研究领域:
化学工程
·
材料科学
·
分子生物学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Dingkun Zhang,Yongzan Zheng,Xiangnan Dou,Haifeng Lin,Syed Niaz Ali Shah,Jin-Ming Lin
Gas–solid phase reactions between ozone (O3) and three representative solids (alcohols, phenols, and saccharides) were investigated through a heterogeneous chemiluminescence (CL) strategy. When interactions between these two species occurred at the surface of the solid powder, an obvious CL effect was obtained. This performance could be attributed to the evolution of a ROOOH intermediate, which subsequently released emissive 1O2 species. This is the first report analyzing the gas–solid phase CL performance of O3 with alcohols, phenols, and saccharides. It is believed that this strategy can be extended to applications in other gas–solid phase CL analyses utilizing the O3 system. This has also created a novel area of gas–solid CL performance; thus, relevant processes and mechanisms can be deduced and identified.
研究领域:
化学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Renjun Si,Yan Li,Jie Tian,Changshu Tan,Shaofeng Chen,Ming Lei,Xin Guo,Shunping Zhang
Temperature modulation technology has been extensively used in metal oxide semiconductor (MOS) gas sensors, especially based on micro-hotplate sensor structure. The technique not only enhances the selectivity but also increases the sensor’s sensitivity by allowing it to exhibit a highly active surface due to the effect of oxygen accumulation. However, when the MOS sensor is in a state of high surface activity, the corresponding hydroxide formation may occur when exposed to water, negatively affecting the gas sensing performance and stability of the sensor. This study focuses on the stability of SnO 2 and In 2 O 3 gas sensors during storage process after temperature modulation test. The results indicate that SnO 2 exhibits good stability, while In 2 O 3 stability is poor. The mechanism responsible for deactivation was discussed with infrared spectroscopy results. The formation of In(OH) 3 was confirmed by high resolution transmission electron microscope , which further confirmed the above conclusion. These findings suggest that after temperature modulation, the gas sensitive materials stored in an atmospheric environment (20 ℃, 40%−60%RH) would generate hydroxides. When temperature modulation was repeated at (100–400 ℃), Sn(OH) 4 decompose into SnO 2 , thus maintaining stability. In contrast, the decomposition temperature of In(OH) 3 is higher. At 400 ℃, it will not decompose into In 2 O 3 in a short time, which would lead to poor stability.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Results in Physics
·
2023
·
IF 5.3
Zhenglong Hu,Lun Tan,Xingxing Fu,Yijing Fan,Meng Sun,Di Zhou,Zhao Wang,Zeping Li,Siliu Xu,Haoshaung Gu
The detection of indoor formaldehyde concentration attracted great attention owing to its serious harm to human bodies. Traditional semiconductor formaldehyde sensors are still suffering from high working temperature and slow response and recovery performance. In this work, a room-temperature semiconductor formaldehyde gas sensor with fast response and high selectivity were developed by exploiting the synergistic effect of Au decoration on MoO 3 nanoribbons. The metallic Au nanocrystals with size lower than 10 nm were prepared by a chemical reduction method and uniformly distributed on the surface of the [1 0 0] -oriented orthorhombic MoO 3 nanoribbons after the surface decoration. The results show that the surface decoration by Au nanoparticles could greatly fasten the response and recovery speed of the sensors at room temperature. Under an optimal composition with Au/Mo atomic ratio of 0.10%, the response and recovery time towards 100 ppm HCHO could be decreased to 4.5 and 3 s. The sample also exhibited high sensitivity and low limit of detection of 1 ppm. Meanwhile, the sensor exhibited highly selective HCHO response with 1–2 magnitude higher sensor response against toluene, ethanal, methanol and acetone. The performance enhancement should be attributed to synergistic effect induced by the surface Au decoration, which not only serves as the catalysts improving the gas adsorption and desorption efficiency, but also introduced additional contribution to the formaldehyde response by forming the metal–semiconductor interface states.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Yushen Ma,Xiaoming Zhu,Hui Chen,Lixiao Ni,Cunhao Du,Chu Xu,Jiahui Shi,Yiping Li,Shiyin Li
Climate change amplifies cyanobacterial blooms, creating a feedback loop between warming and bloom intensity. This dynamic emphasizes the need to address greenhouse gas (GHG) emissions during in-situ cyanobacterial control, minimizing algicides use and its long-term climatic impacts. However, research on the dose-response of algicides on GHG emissions is limited. This study investigated the dose-dependent effects of artemisinin sustained-release algicides (ASAs) on GHG emissions and microbial dynamics during cyanobacteria recovery prevention. Microcosm experiments revealed that ASAs dosage reshaped the carbonate system, lowering pH and increasing DOC and C/N ratio, promoting short-term CO₂ emissions. Microbial diversity decreased with higher ASAs dosage, and Proteobacteria replaced Cyanobacteria as the dominant group. The formate metabolic pathway, which produces CO₂, was strengthened, while CH₄ oxidation was weakened. The abundance of genera such as Curvibacter, Burkholderiales , and Acetobacterales increased, correlating with enhanced carbon and nitrogen metabolism, while CH₄-oxidizing genera like Methylobacterium and Methylorubrum showed reduced abundance, associated with weakened CH₄ metabolism. Co-occurrence networks emphasized that the ASAs gradient indirectly affected dominant microbes and carbon-nitrogen metabolism by altering water chemistry. ASAs exacerbated GHG emissions by coupling environmental changes with microbial metabolism. Our findings provide a theoretical basis for using lower ASAs dose during cyanobacteria recovery prevention and underscore the importance of considering biogeochemical cycles and ecosystem impacts in cyanobacterial control.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Lu Mengqi,Wang Ruoyu,Miao Xiaoxuan,Tang Tingting,Hu Wenfeng,Jin Xiaoxuan,Wang Haoxiang,He Yuyang,Wang Yang,Xu Dongpo
The increasing consumption of high-protein seafood has heightened the demand for efficient detection of triethylamine (TEA), a key spoilage biomarker. In this study, a novel ternary SnO 2 -Pt/Ti 3 C 2 T x composite was for the first time fabricated via a combined strategy of electrospinning and electrostatic self-assembly for TEA sensing. Characterization confirmed the formation of a well-defined ternary heterostructure with abundant mesopores and a synergistic microstructure. Benefiting from this rational design, gas sensing tests revealed that the composite exhibits a high response, fast response/recovery, excellent cycling/long-term stability, and high selectivity with a low detection limit of 0.05 ppm at an optimal temperature of 122.28°C, alongside stable performance under 30–70% relative humidity. The enhanced performance is attributed to the catalytic effect of Pt, high conductivity of MXene, and synergistic interactions among the components. This work provides new insights for developing high-performance TEA gas sensors with promising practical potential. Graphical abstract
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DOI
高影响因子
TALANTA
·
2026
·
IF 6.1
Chu Zeng,Hong-Tao Jiang,Ming Xu,Zhi-Yuan Gu
Flexible metal–organic frameworks (MOFs) with dynamic adaptability offered exciting opportunities for advanced separation, yet their tendency to undergo void collapse severely limited their application as gas chromatography (GC) stationary phases. Here, we overcame this challenge by stabilizing the scu -topology Zr-MOF NU-903 through a linker installation strategy. By incorporating biphenyl-4,4′-dicarboxylic acid (BPDC) into the vacant coordination pockets along the c-axis, the resulting material, NU-903-BPDC, exhibited markedly enhanced stability and structural rigidity, retaining its porosity even at 250 °C. Comprehensive characterization confirmed that the original structure was preserved, while framework flexibility was effectively suppressed. Fluorescence spectroscopy further revealed restricted ligand dynamics, corroborating the rigidified framework environment. When employed as a GC stationary phase, NU-903-BPDC delivered significantly improved resolution for C 7 hydrocarbons and dichlorobenzene isomers, benefitting from stronger thermodynamic interactions and reduced band broadening. Crucially, NU-903-BPDC maintained stable separation performance after thermal treatment, in sharp contrast to the pronounced degradation observed for pristine NU-903. This work demonstrated linker installation as an effective strategy to modulate framework flexibility, opening a general pathway toward robust, high-performance MOF-based stationary phases for chromatographic separations.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2025
·Vol. 95
·期 4
·958-968
·
IF 0.8
Wang W.,Gu Z.,Chen X.,Cai D.,Zhang A.,Niu X.,Zhou Y.,Weng X.,Lu H.
Organic solvents (e. g., mineral oil) are frequently employed as absorbents to purify VOCs, but their absorption efficiency and saturation capacity are limited and the high viscosity causes uneven liquid distribution and increased pressure drop, restricting their industrial applications. To surmount these limitations, this work develops the use of water as an absorbent combined with aqueous-phase chemical oxidation absorption to remove low-concentration styrene from exhaust gases. The effects of key parameters, including oxidant type, styrene concentration, and liquid-phase pH on the oxidation absorption performance were systematically investigated. Experimental results indicate that KMnO 4 outperforms K 2 FeO 4 and NaClO 2 in enhancing styrene absorption, KMnO 4 can interact with the C=C bonds in styrene to form cyclic permanganate ester intermediate with a lower activation energy, thereby facilitating the oxidation process. Under the oxidation action of KMnO 4 , styrene is rapidly oxidized into water-soluble species, primarily benzaldehyde, significantly improving the absorption ability of water for styrene, with a purification efficiency exceeding 95%. In weakly alkaline conditions of pH 9, the saturation absorption capacity of KMnO 4 for styrene reaches 308.6 mg/g. A detailed reaction pathway for the KMnO 4 -mediated oxidation of styrene under various pH conditions is proposed and further validated through quantum chemical calculations. Additionally, kinetic studies reveal that the oxidation of styrene by KMnO 4 follows a second-order reaction model, with an apparent activation energy of 15.205 kJ/mol. These findings provide valuable insights into the development of efficient VOCs purification technologies for industrial applications.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Lixia Yang,Feishi Xu,Guangwen Chen
Ultrasonic oscillation can be leveraged to efficiently intensify the gas-liquid mass transfer in microreactors. This work aims at revealing the gas-liquid mass transfer enhancement mechanism in zigzag ultrasonic microreactors (zigzag USMRs). A rigorous and quantitative comparison of the O 2 mass transfer performance and mixing efficiency inside the liquid slug during the Taylor bubbles flowing within the straight and zigzag USMRs was made. The synergetic effect of zigzag geometry and ultrasonic oscillation can enhance the mass transfer by an enhancement factor from 1.88 to 3.80. However, this synergetic effect would not have a significant impact on the mixing efficiency inside the liquid slug with an enhancement factor from 0.91 to 1.03. The synergetic enhancement effect of gas-liquid mass transfer performances could not be regarded as simply adding up the separate contribution of zigzag geometry and ultrasonic oscillation. Semi-empirical equations were established to predict the overall mass transfer coefficient in zigzag USMRs.
研究领域:
化学工程
·
生物技术
✓ 已验证
DOI
高影响因子
Journal of Natural Gas Science and Engineering
·
2019
·
IF 3.859
Lijun Zhu,Xinfeng Lv,Shuyue Tong,Tingting Zhang,Yurou Song,Yongjie Wang,Zhao Hao,Chao Huang,Daohong Xia
The metal modified zeolite was prepared by impregnation combined with roasting and the adsorption performance of organic sulfur in natural sulfur was evaluated. The zeolite type, ion concentration, calcination temperature, anion and cationic species all have effect on the desulfurization performance. Anions have a great influence on the performance of the zeolite modified by copper ions . Ag/13X had the highest adsorption capacity to methyl sulfide and the adsorption capacity increased by 1.6 times than that of the unmodified 13X zeolite. The order of adsorption capacity to sulfide by Cu/13X is ethyl mercaptan > methyl sulfide > dimethyl disulfide. And the adsorption capacity to the mixed sulfide is greater than that of the single sulfide, but less than the sum of the single sulfides. After regeneration by calcination , the adsorption capacity is basically recovered. Metal-modified zeolites are well suited for the deep removal of organic sulfur from natural gas.
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2017
·
IF 2.572
Chao Fan,Gangzha Liu,Yonghui Zhang,Mengjun Wang
Herein novel MoS 2 bean-sprout-like nanostructures were synthesized by a facile solid-state reaction, and devices based on the as-grown products were also fabricated. SEM images show the as-grown products are porous and bean-sprout-like. Phase structures and elemental composition were detected by EDS, XRD and Raman. The results demonstrate the as-grown products are pure MoS 2 without any contaminations. Gas-responsive characteristics to two Volatile Organic Compounds (VOC) methanol and isopropanol were investigated for the first time and related gas-responsive mechanisms are proposed. The devices show gas-responsive properties to methanol and isopropanol, which reveals a new potential application of VOC gas sensors for MoS 2 .
研究领域:
材料科学
·
纳米技术
·
气体传感
·
固相化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Zequn Yang,Hailong Li,Wenqi Qu,Mingguang Zhang,Yong Feng,Jiexia Zhao,Jianping Yang,Kaimin Shih
Mineral sulfide based sorbents were superior alternatives to traditional activated carbons for elemental mercury (Hg0) immobilization in industrial flue gas. A systematical study concerning the influence of sulfur trioxide (SO3) on Hg0 adsorption over a nanosized copper sulfide (Nano-CuS) was for the first time conducted. SO3 was found to significantly inhibit the Hg0 removal over Nano-CuS partially because SO3 oxidized the reduced sulfur species (sulfide) with high affinity to mercury to its oxidized sulfur species (sulfate). Moreover, a brand new “oxidation-reduction” mechanism that led to a simultaneous oxidation of sulfide and reduction of mercury on the immobilized mercury sulfide (HgS) was responsible for the inhibitory effect. Even though the released Hg0 from the reduction of mercury in HgS could be oxidized by SO3 into its sulfate form (HgSO4) and recaptured by the sorbent, the “oxidation-reduction” mechanism still compromised the Hg0 capture performance of the Nano-CuS because HgSO4 deposited on the sorbent surface could be easily leached out when environmentally exposed. These new insights into the role of SO3 in Hg0 capture over Nano-CuS can help to determine possible solutions and facilitate the application of mineral sulfide sorbents as outstanding alternatives to activated carbons for Hg0 immobilization in industrial flue gas.
研究领域:
环境科学
·
化学工程
·
污染控制
·
汞去除
·
气相吸附
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）