CATALYSIS LETTERS
·
2019
·Vol. 150
·期 2
·375-383
·
IF 2.372
Liu Xiaolong,Zhao Ziwei,Ning Ruliang,Qin Yu,Zhu Tingyu,Liu Fagao
The promoting effect of Ce on V-W/Ti catalyst for selective catalytic reduction (SCR) of NO x by NH 3 was studied. Compared with the original V-W/Ti samples, addition of Ce contributed better NH 3 -SCR performance. The H 2 O and SO 2 resistance of Ce modified V-W/Ti catalyst was improved by the different impregnation sequence of Ce. The catalysts were characterized by NH 3 -temperature programmed desorption (NH 3 -TPD), X-ray photoelectron spectroscopy (XPS), and H 2 -temperature programmed reduction (H 2 -TPR) techniques. The results showed that the impregnation sequence of W and Ce influenced the NH 3 adsorption capacity of the catalysts. In comparison to 0.2V-5Ce-5W/Ti and 0.2V-(5Ce5W)/Ti, 0.2V-5W-5Ce/Ti catalyst contributed better H 2 O and SO 2 resistance, with the highest Ce 3+ /(Ce 4+ + Ce 3+ ) value of 36.6%. Besides, a catalytic mechanism of SCR reactions over Ce-doped V-W/Ti catalysts was proposed. Graphic
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Lingchu Huang,Sitong Feng,Weijia Li,Huaiyuan Sun,Jianyu Zhang,Qi Lu,Tong Wang,Xiaoyong Sun,Rui Han,Xishuang Liang,Fangmeng Liu,Peng Sun,Fengmin Liu,Bin Wu,Geyu Lu
In this work, nitrogen doped carbon fiber loaded copper (Cu/CF-N) sensing electrode and Nafion proton conductor are used to fabricate fuel cell type gas sensors that realize fast response/recovery for SO 2 detection at room temperature . This is the first time that this type of sensor has been used to detect SO 2 . We investigated the effect of Cu content on sensors’ performance, and found that the Cu (20 wt%)/CF based sensor exhibited the highest response. This can be attributed to the optimal Cu content, which exposes the most active sites. Moreover, nitrogen was doped into electrode material to further improve the performance. Nitrogen atoms enhance the conductivity of the material and its ability to adsorb SO 2 . These are confirmed by the complex impedance measurement and TPD analysis. The upgraded Cu/CF-N fuel cell type gas sensor showed a response of − 435.6 nA to 50 ppm SO 2 and a low detection limit of 500 ppb. Significantly, the Cu/CF-N sensor demonstrated short response time (44 s) and recovery time (87 s) at room temperature. Furthermore, with the advantages of no power consumption , excellent selectivity and good repeatability, the fuel cell type gas sensors have broad prospects in the field of room temperature gas detection.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Dan Li,Yong Kang
A novel class of hybrid solvents (mEIP:Tetz) comprising of N-methylated ethylene imine polymer (mEIP) and 1-ethyl-3-methylimidazolium tetrazolate ([Emim][Tetz]) were developed for the highly efficient and reversible capture of SO 2 . The synergistic interactions rather than simple mixing between mEIP and [Emim][Tetz] were confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and density functional theory (DFT) calculations. Besides, it was experimentally demonstrated that mEIP:Tetz mixtures exhibited improved kinetics for SO 2 absorption, and the production of viscous solids were completely eliminated, compared with using mEIP alone. More significantly, an exceedingly high solubility of 0.308 g SO 2 ·g −1 absorbent in 2mEIP:8Tetz was received for trapping SO 2 from simulated flue gas containing 2000 ppm SO 2 , which was much higher than most of the results reported in previous literatures under the same conditions. Finally, the absorption and desorption mechanisms were proposed according to the results of FTIR and 1 H NMR analysis.
研究领域:
环境化学
·
碳捕集与气体分离
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材料科学
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离子液体
·
聚合物科学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xiankun Wu,Chenyang Xu,Weijian Xiong,Qiang Zhang,Wentao Zheng,Xiaomin Zhang,Youting Wu
The efficient and selective capture of SO 2 from flue gas remains a critical challenge due to the high viscosity and poor SO 2 /CO 2 selectivity of conventional functionalized ionic liquids (FILs). Herein, a series of carboxylate-functionalized ionic liquids based on tetraethylammonium ([N 2222 ]) with different anions (DMG, NA, ImAc) were synthesized, and high-boiling sulfolane (SUL), ethylene glycol (EG), and N -methylpyrrolidone (NMP) were introduced as co-solvents to reduce viscosity and tune the interaction environment. Among all systems, the [N 2222 ][ImAc]-SUL mixed solvent exhibited the best comprehensive performance, achieving an ultrahigh SO 2 absorption capacity of 15.9 mol/kg at 293.2 K and an outstanding SO 2 /CO 2 selectivity of 36.0. Combined FT-IR and NMR characterizations with DFT calculations and molecular dynamics simulations revealed a multi-site synergistic mechanism: the carboxylate oxygen (−COO − ) serves as the primary chemisorption site (ΔH = −67.9 kJ/mol), the sp 2 -hybridized imidazole nitrogen provides auxiliary coordination, and sulfolane contributes physical solvation via dipole–dipole interactions. Furthermore, the system demonstrated satisfactory cyclic stability over five absorption–desorption cycles at a mild regeneration temperature of 343.2 K. This work provides a highly promising absorbent for industrial SO 2 emission control and offers mechanistic insights for designing selective acid gas capture systems.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yanlong Li,Tingting Xiao,Yu Jiang,Zheng Liu,Tianhua Yang,Rundong Li
Non‑carbon adsorbents with excellent thermal stability are urgently needed for heavy metal control in sludge incineration flue gas. In this study, activated boron nitride (A-BN) with a high specific surface area (1308 m 2 /g) was synthesized via an organic precursor method. The effects of typical flue gas components (O 2 , CO 2 , SO 2 ) on the adsorption performance of A-BN for Zn, Cu, Pb and Cd in sludge incineration flue gas was systematically investigated. The results showed that O 2 (6 vol%) slightly enhanced the heavy metal adsorption capacity of A-BN, increasing the total adsorption capacity for the four heavy metals from 137.83 mg/g to 193.41 mg/g, while CO 2 exerted a slight inhibitory effect with the total adsorption capacity reduced to 129.66 mg/g. Notably, SO 2 demonstrated a significant promoting effect. At the optimal concentration of 700 ppm and the optimal adsorption temperature of 400 °C, the total adsorption capacity reached 545.20 mg/g, corresponding to a 2.81-fold increase compared to that in the simulated flue gas without SO 2 . The promotion mechanism was elucidated: SO 2 , in the presence of O 2 and trace moisture, is converted into surface sulfate and bisulfate species (SO 4 2− /HSO 4 − ), which serve as new polar active sites that enhance heavy metal chemisorption and sulfation. A-BN exhibits excellent SO 2 tolerance, high adsorption capacity, and rapid adsorption kinetics (reaching equilibrium within approximately 40 min), demonstrating great potential as a novel non‑carbon adsorbent for controlling heavy metal emissions in sludge incineration flue gas.
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Industrial Chemistry & Materials
·
2025
·
IF 11.9
Bocheng Yu,Muqing Yang,Yijian Qiao,Yaozu Wang,Yongqing Xu,Xuan Bie,Qinghai Li,Yanguo Zhang,Shuzhuang Sun,Hui Zhou
Integrated carbon capture and utilization (ICCU) has emerged as a promising strategy toward carbon neutrality. However, most existing studies rely on simulated flue gas compositions, neglecting the impact of common impurities such as sulfur oxides (SOx) and nitrogen oxides (NOx), thereby limiting the practical industrial applicability of ICCU technologies. Herein, we systematically investigate the effects of SO2 and NO2 at various concentrations on the adsorption-catalysis performance based on a representative Ni-Ca dual functional material (DFM) in ICCU-dry reforming of methane (ICCU-DRM) process. Exposure to 100 ppm SO2 showed negligible influence on catalytic activity but markedly inhibited carbon deposition. Further increasing the SO2 concentration to 500 ppm led to complete deactivation of the DFM. NO2 exhibited a similar concentration-dependent trend to SO2, albeit with a comparatively lower impact. Mechanistic analysis revealed that both SO2 and NO2 promote the formation of a coating layer of calcium-containing compounds on the surface of Ni nanoparticles, accounting for the part or total deactivation. These findings offer critical insights into the industrial applications of ICCU systems under realistic flue gas conditions.
研究领域:
化学工程
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环境科学
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能源技术
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催化
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材料科学
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ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Jiali Zhu,Shuang Wu,Hongxing Yue,Erhao Gao,Wei Wang,Jing Li,Zuliang Wu,Shuiliang Yao
Photochemistry plays a significant role in the atmospheric aging processes of soot. However, the physicochemical properties and changes in environmental and health effects of soot particles from sacrificial sources after photochemical aging remain unclear. The reaction mechanisms of soot under different irradiation wavelengths require further investigation. In this study, candle soot from sacrificial sources was subjected to photochemical aging using ultraviolet (UV) and visible light. The experimental results of oxidation potential (OP) and heterogeneous oxidation of sulfur dioxide (SO 2 ) indicated that both UV and visible light promoted the photooxidation of candle soot, leading to significant increases in oxygen-containing functional groups, environmentally persistent free radicals, and negative charges on soot surfaces. After photochemical aging, candle soot exhibited higher OP values and enhanced SO 2 oxidation and sulfate formation. UV light had a stronger photooxidation ability on candle soot than visible light. Mechanistic analysis revealed that the photochemical aging mechanisms driven by reactive oxygen species were different under these two wavelengths. Photosensitive aging induced by organic carbon under UV light was stronger than the photocatalytic oxidation induced by element carbon under visible light. Our research findings provided new insights into the photochemical aging mechanisms and health impacts of soot.
研究领域:
大气科学
·
环境健康
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 12.2
Ya Zhao,Chong Wang,Yingqi Zhao,Yufeng Shao,Hua Xie,Jiayue Yang,Weiqing Zhang,Guorong Wu,Gang Li,Ling Jiang,Xueming Yang
Elucidating the impacts of gaseous pollutants on secondary organic aerosol (SOA) formation mechanisms is critical for developing effective PM2.5 mitigation strategies. However, the combined effects of NOx (NOx = NO2 + NO) and SO2 on SOA compositions under complex photochemical conditions remain mechanistically unresolved. Here, we investigated the individual roles of NO2/NO and their combined effects with SO2 on β-myrcene photooxidation. Our results showed that NO2 enhanced the SOA yield and the O:C ratio through oxidant amplification, whereas NO suppressed nucleation and oxidation states of products but facilitated particle size growth via organic nitrate partitioning. SO2 exhibited significant synergistic effects with both NO2 and NO, facilitating particle formation and growth processes. The newly built vacuum ultraviolet free electron laser photoionization aerosol mass spectrometer enabled the observation of a series of new compounds (i.e., organic peroxides, organic nitrate, and organosulfates) and identified new mechanisms of SOA formation. Notably, a novel compound with a molecular weight of 287 was characterized to be a nitrogen- and sulfur-containing species. These findings highlight the critical roles of pollutants in particle formation in environmental processes and provide key scientific support for regional air quality management and climate change mitigation.
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BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Junchao Xu,Jian Pan,Xiaoming Jiang,Caiqin Qin,Lintao Zeng,Huan Zhang,Jun Feng Zhang
In this study, we report a ratiometric fluorescent probe ( CZBI ) for sulfur dioxide (SO 2 ) derivatives based on the conjugate of carbazole and benzo[ e ]indolium, which displays colorimetric and ratiometric fluorescence dual response to HSO 3 − . The probe can quantitatively detect HSO 3 − with high specificity, fast response (within 40 s) as well as low detection limit (10 nM). A 1,4-nucleophilic addition reaction was proposed for the sensing mechanism of this probe, which was confirmed by 1 H NMR and HR-MS spectra. Fluorescence co-localization studies demonstrated that CZBI was a specific mitochondria-targeted fluorescent probe for SO 2 derivatives with excellent cell membrane permeability . Furthermore, fluorescence imaging of HeLa cells indicated that CZBI could be used for monitoring the intrinsically generated intracellular SO 2 derivatives in living cells by ratiometric fluorescence imaging. Thus, CZBI has a great potential application for exploring the role played by SO 2 derivatives in biology.
研究领域:
生物化学
·
细胞生物学
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分析化学
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Catalysts
·
2026
·Vol. 16
·期 6
·503
·
IF 4.5
Yudong Meng,Xing Fan,Zehui Yu,Jianyu Cai
In this study, Pt/N-Mo/TiO2and Pt/Mo/TiO2catalysts were prepared by the two-step impregnation method for catalytic CO oxidation, with the obtained Mo/TiO2pretreated or not with NH3before Pt loading. The Pt/N-1Mo/TiO2catalyst exhibited superior catalytic activity compared to Pt/1Mo/TiO2and Pt/N-xMo/TiO2(x= 0, 0.5, 2, 3, 5), indicating the essential role of N-modification of Mo/TiO2with an optimal MoO3loading. TheT90decreased from 133 °C for Pt/1Mo/TiO2to 105 °C for Pt/N-1Mo/TiO2under a feed gas consisting of 8000 ppm CO, 16% O2, 3% H2O and balanced N2. For both Pt/1Mo/TiO2and Pt/N-1Mo/TiO2catalysts, the H2O in the feed gas showed promotive effects on CO oxidation, while SO2caused some deactivation at low temperatures. Under the same feed gas composition (8000 ppm CO, 16% O2, 10% H2O, 50 ppm SO2and balanced N2) and temperature (185 °C), Pt/N-1Mo/TiO2demonstrated superior SO2resistance compared to Pt/1Mo/TiO2. CO conversion on Pt/N-1Mo/TiO2remained above 99% during a 12-h SO2resistance test, while that on Pt/1Mo/TiO2gradually decreased to 26%. Characterization results show that NH3pretreatment of 1Mo/TiO2significantly improved the dispersion of Pt and enhanced the dissociation of adsorbed H2O into highly reactive hydroxyl (*OH) species, partially explaining the better activity of Pt/N-1Mo/TiO2compared with Pt/1Mo/TiO2. H2O might promote CO oxidation by facilitating the formation of easily decomposable bicarbonate and formate intermediates. SO2impeded the Pt reduction process on Pt/1Mo/TiO2while it hardly affected that on Pt/N-1Mo/TiO2, explaining their difference in SO2resistance.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiangxin Tong,Guangzhen Li,Yuan Chen,Wenbo Zhao
A low viscous and high thermal stable dibutyl-(1,1-dimethyl-3,3,3-triphenyl-disiloxanylmethyl)-amine (DDTDA) was synthesized by two steps reaction. Its reaction enthalpy and entropy change with SO 2 were found to be −85.39 kJ/mol and −244 J mol −1 K −1 , whose absolute value are much higher than those of ionic liquids (ILs) and deep eutectic solvents (DESs). An objective function was proposed to balance reversible capacity and regeneration sensible heat consumption per unit absorption capacity. Based on it, the optimal absorption and desorption temperature of DDTDA were calculated and the temperature difference was found to be much lower than those of ILs and DESs, which implied its regeneration sensible heat is the lowest. According to the function, the traditional method to evaluate two absorbents by simply comparing their capacities at a certain temperature is unscientific. Different absorbents have different optimal absorption and desorption temperature range.
研究领域:
化学工程
·
环境化学
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材料科学
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气体分离
·
热力学
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
JiaYu Chen,Peng Fu,Daofei Lv,Yang Chen,Meiling Fan,Junliang Wu,Amogh Meshram,Bin Mu,Xiang Li,Qibin Xia
A high-performance denitration catalyst based on Mn-Ce mixed-oxide derived from a specific Mn/Ce precursorwas fabricated by solvothermal method. It exhibited outstanding low-temperature activity, which achieved above 90% NO x conversion in the temperature of 150–310 °C. Remarkably, Mn-Ce mixed-oxide demonstrated a much better SO 2 tolerance, in which the NO x conversion increased from 92.6% to 97.8% at 150 °C after introducing 200 ppm SO 2 . The synthesized Mn-Ce mixed-oxide has a porous structure with abundant chemisorbed oxygen spices and exposed active sites. In addition, the increased acidity and redox capacity enhanced the catalytic activity after introducing SO 2 . Meanwhile, the injection of SO 2 separates NH 3 adsorption sites from oxidation agents, inhibiting the unwanted oxidization of ammonia to nitrogen oxides. Furthermore, the reaction pathway on Mn-Ce mixed-oxide proved to be the L-H mechanism based on in situ DRIFTS. Thus, the synthesized Mn-Ce mixed oxide demonstrated an excellent denitration performance and the especially high SO 2 tolerance, showing great potential for low-temperature NH 3 -SCR.
研究领域:
环境科学
·
催化材料
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