ENERGY & FUELS
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2019
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IF 3.021
XiangFeng Tian,LeMeng Wang,Dong Fu
The absorption performance including absorption capacity and loading values of low-partial-pressure H2S in tetramethylammonium glycinate ([N1111][Gly]) promoted N-methyldiethanolamine (MDEA) aqueous solution was measured. The apparent absorption rate was calculated from the time-dependent absorption capacity. The effects of absorbent composition, temperature, and H2S partial pressure on absorption capacity and apparent absorption rate were demonstrated. The H2S removal efficiency was verified in a tray tower using the [N1111][Gly]–MDEA aqueous solution as an absorbent, and the results show that the removal efficiency can reach 100%, which met the requirement of the first degree of Chinese cleaner production standard (coking industry, HJ/T 126-2003, I, H2S ≤ 0.2 g/m3). Compared with the traditional amine-based absorbents like MDEA–monoethanolamine aqueous solution, the [N1111][Gly]-promoted MDEA aqueous solution has a higher absorption capacity and a higher absorption rate for H2S. Moreover, when the mass fraction of MDEA reaches up to 50%, the removal efficiency in the tray tower can still reach 100%. The decrease of the water content in the absorbent can greatly reduce the energy cost of the regeneration of rich solution and the cooling of poor solution. Therefore, the new absorbent proposed in this work has good commercial application potential in the field of desulfurization of the coke oven gas.
研究领域:
化学工程
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环境工程
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DOI
高影响因子
MOLECULAR NUTRITION & FOOD RESEARCH
·
2024
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IF 4.5
Kelin Li,Victoria A. Uyanga,Xiaojuan Wang,Hongchao Jiao,Jingpeng Zhao,Yunlei Zhou,Haifang Li,Hai Lin
Scope Allicin, a product of enzymatic reaction when garlic is injured, plays an important role in maintaining glucose homeostasis in mammals. However, the effect of allicin on glucose homeostasis in the state of insulin resistance remains to be elucidated. This study investigates the effect of allicin on glucose metabolism using different muscle fibers in a chicken model. Methods and results Day-old male Arbor Acres broilers are randomly divided into three groups and fed a basal diet supplemented with 0, 150, or 300 mg kg −1 allicin for 42 days. Results show that allicin improves the zootechnical performance of broilers at the finishing stage. The glucose loading test (2 g kg −1 body mass) indicates the regulatory role of allicin on glucose homeostasis. In vitro results demonstrate allicin increases glutathione (GSH) level and the expression of cystathionine γ lyase (CSE), leading to endogenous hydrogen sulfide (H 2 S) production in M. pectoralis major (PM) muscle-derived myotubes. Allicin stimulates adenosine monophosphate-activated protein kinase (AMPK) S-sulfhydration and AMPK phosphorylation to promote glucose uptake, which is suppressed in the presence of d , l -propargylglycine (PAG, a CSE inhibitor). Conclusion This study demonstrates that allicin induces AMPK S-sulfhydration and AMPK phosphorylation to promote glucose uptake via the CSE/H 2 S system in a muscle fiber-dependent manner.
研究领域:
动物科学
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营养学
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分子生物学
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2025
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IF 4.7
Chao Yang,Hao Chen,Yuankai Li,Zhelin Su,Yeshuang Wang,Xufei Liu,Huiling Fan
The low sulfur selectivity of Fe-based H2S-selective catalytic oxidation catalysts is still a problem, especially at a high O2 content. This is alleviated here through anchoring FeOx nanoclusters on UiO-66 via the formation of Fe–O–Zr bonds. The introduced FeOx species exist in the form of FeIII and FeII. Therein the FeIII–O species are the predominant active sites for H2S-oxidation. The formed Fe–O–Zr bonds strengthen the redox cycle of FeIII/FeII through promoting electron transfer from Fe to Zr. The FeII–O species can activate molecular oxygen to oxidize H2S into elemental S, which accelerates the formation rate of atomic S, hindering its further oxidation into SO2. The combination of these factors empowers the catalysts, enabling 100% H2S conversion and 98.2% sulfur yield. The catalyst also has satisfactory stability with the sulfur selectivity only decreasing from 98.2% to 91.3% after the reaction going on 50 h. The decreased sulfur selectivity might be caused by the deterioration of pores and the deposition of elemental S on the surface. The former hinders the diffusion of sulfur oligomers timely from pores to the gas phase, while the latter is suspected to capture electrons to promote its further reaction with molecular oxygen.
研究领域:
化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Ganchang Lei,Zhangjia Fan,Yufei Hou,Fangyi Liu,Shipping Wang,Lijuan Shen,Yingying Zhan,Lilong Jiang
Construction of metal-free carbon-based materials for efficient sulfur resource recovery in pollutant H 2 S is very critical for both applied environmental catalysis and fundamental material exploration. Herein, we report a template-free hydrothermal method to prepare hierarchical nitrogen-doped mesoporous carbon (HNMCs) materials with abundant nitrogen sites and large BET surface area. The representative HNMC-800 achieves a H 2 S conversion of ∼100% and sulfur selectivity of ∼95% at 150 °C in H 2 S selective oxidation. Moreover, HNMCs catalysts are resistant to sulfur poisoning, displaying good catalytic durability, with no significant loss of sulfur yield in the run of 80 h, outperforming the pure active carbon, g-C 3 N 4 , and commercial Fe 2 O 3 . This work provides the possibility of utilizing hierarchical nitrogen-doped carbon materials as metal-free catalysts for the selective oxidation of H 2 S.
研究领域:
环境催化
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材料科学
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产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
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2023
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IF 7.5
Yi Yuan,Lijia Huang,Tian C. Zhang,Yuan Wang,Shaojun Yuan
Metal oxide loaded carbon-based materials have attracted extensive attention as promising desulfurizers to solve the problem of H 2 S emission at room temperature . However, low desulfurization capacity, difficult regeneration and high economic cost are the main problems of metal oxide loaded carbon-based desulfurizers, which limit their industrial application. Herein, a novel and low-cost CaCO 3 -ZnO loaded biochar (RCZ) was synthesized by one-step pyrolysis of scrap rice and metal salts for highly efficient H 2 S removal at room-temperature. The optimized RCZ-1-1-1-800 sample showed an excellent H 2 S removal ability of 834.48 mg/g at the reaction temperature of 25 °C, oxygen content of 10%, and relative humidity of 70% as compared to 29.31 mg/g achieved by the inactivated biochar (prepared without activator). Such an RCZ-1-1-1-800 desulfurizer also delivered a high H 2 S removal ability under different desulfurization conditions. The associated desulfurization mechanism of RCZ was the coupling of reactive adsorption and catalytic oxidation with sulfur being the main desulfurization product. Moreover, the as-fabricated RCZ also exhibited a high reusability , retaining about 95% of the initial H 2 S removal capacity after five adsorption/regeneration cycles. This work provides a promising idea for the preparation of low-cost and high-capacity metal oxide- and carbonate-loaded carbon-based desulfurizers.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Theranostics
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2020
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IF 8.579
Qingqing Tian,Lu An,Qiwei Tian,Jiaomin Lin,Shiping Yang
Rationale : Chemodynamic therapy (CDT) based on the Fe(II)-mediated Fenton reaction is an emerging tumor treatment strategy. However, the catalytic efficiency in tumors is crucially limited by Fe(II). Herein, an endogenous hydrogen sulfide (H 2 S) accelerated Fe(III)/Fe(II) transformation and photothermal synergistically enhanced CDT strategy based on ellagic acid-Fe-bovine serum albumin (EA-Fe@BSA) nanoparticles (NPs) was developed for colon tumor inhibition. On the one hand, the Fe(III) with low catalytic activity in the EA-Fe@BSA NPs could be rapidly reduced to the highly active Fe(II) by the abundant H 2 S in colon cancer tissues. Thus, a rapid Fe(III)/Fe(II) conversion system was established, wherein highly active Fe(II) ions were continuously regenerated to improve the CDT efficiency. On the other hand, the photothermal effect of EA-Fe@BSA NPs also accelerated the production of hydroxyl radicals (•OH), thereby synergistically enhancing the CDT performance and improving the therapeutic efficacy. Methods : The endogenous H 2 S accelerated Fe(III)/Fe(II) conversion and PTT enhanced CDT were investigated by characterization of the Fe valence state and detection of •OH. T 1 -weighted magnetic resonance imaging (MRI) was tested both in vitro and in vivo . The biocompatibility of NPs were examined via MTT assay, hemolysis analysis and routine blood measurements. The enhanced CDT was investigated in HCT116 colon cancer cells by Calcein-AM/PI staining and MTT assay, and tumor inhibition was demonstrated in HCT116 tumor bearing mice. Results : In this work, EA-Fe@BSA NPs were constructed as a CDT theranostic reagent. The H 2 S accelerated Fe(III)/Fe(II) conversion was confirmed, more degradation of MB and generation of •OH demonstrated the enhanced CDT in vitro . EA-Fe@BSA NPs exhibited good T 1 -weighted MRI performance. More importantly, it displayed strong near-infrared (NIR) absorption and excellent photothermal efficiency, further promotes the production of •OH. Hence, the efficacy of CDT was enhanced, and the tumor growth was inhibited efficiently. Conclusion : All results demonstrate that this strategy based on endogenous H 2 S promoted Fe(III)/Fe(II) transformation together with PTT acceleration permits efficient Fenton-reaction- mediated CDT both in vitro and in vivo , which holds great potential for effective colon cancer theranostics.
研究领域:
生物医学工程
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肿瘤治疗
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纳米医学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Chao Li,Yun Teng,Huanong Cheng,Hongwei Jin,Kangkang Li,Zhou Feng,Zhonghao Li,Xinshun Tan,Shiqing Zheng
The density and viscosity of N-butylmorpholine bromide iron-based ionic liquids ( r FeCl 3 / [Nbmm]Br) with two iron-morpholine ratios ( r = 0.8 and 1.0) mol·mol −1 were measured at 303.15–348.15 K and 101.3 kPa. Density and viscosity data were fitted by empirical correlations for temperature. The average relative errors were less than 0.02 % and 2 %, respectively. The density and viscosity decrease with increasing temperature. The density increases with the increase of r , while the viscosity shows the opposite trend. The gas-liquid equilibrium data of H 2 S in r FeCl 3 /[Nbmm]Br were measured by the isochoric pressure drop method at temperatures of 303.15–348.15 K, pressures of 0–200 kPa, and r of 0.8 and 1.0 mol·mol −1 . The total solubility of H 2 S increases with decreasing temperature, increasing pressure, and decreasing r . The measured solubility data were fitted by the reaction equilibrium thermodynamic model. Chemical reaction equilibrium constant and the Henry's constant at different temperatures and different r were obtained. The average relative error of model fitting is less than 3 %. The results show that the chemical reaction equilibrium constant and the Henry’s constant both decrease with the increase of r , and decrease of temperature. Effect of molecular structure on reaction equilibrium constants was explained by quantum chemistry calculation. The absorption of H 2 S in r FeCl 3 / [Nbmm]Br at low pressure is dominated by chemical absorption. With the increase of pressure, the proportion of physical absorption continues to increase, and gradually occupies the main part.
研究领域:
化学工程
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物理化学
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材料科学
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产品关联
DOI
高影响因子
ACS Sensors
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2024
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IF 8.2
Yangyang Huo,Limin Qiu,Tianqi Wang,Hui Yu,Wenyuan Yang,Xiangting Dong,Ying Yang
The development of a portable, low-cost sensor capable of accurately detecting H2S gas in exhaled human breath at room temperature is highly anticipated in the fields of human health assessment and food spoilage evaluation. However, achieving outstanding gas sensing performance and applicability for flexible room-temperature operation with parts per billion H2S gas sensors still poses technical challenges. To address this issue, this study involves the in situ growth of MoS2 nanosheets on the surface of In2O3 fibers to construct a p–n heterojunction. The In2O3@MoS2-2 sensor exhibits a high response of 460.61 to 50 ppm of H2S gas at room temperature, which is 19.5 times higher than that of the pure In2O3 sensor and 322.1 times higher than that of pure MoS2. The In2O3@MoS2-2 also demonstrates a minimum detection limit of 3 ppb and maintains a stable response to H2S gas even after being bent 50 times at a 60° angle. These exceptional gas sensing properties are attributed to the increase in oxygen vacancies and chemisorbed oxygen on In2O3@MoS2-2 nanofibers as well as the formation of the p–n heterojunction, which modulates the heterojunction barrier. Furthermore, in this study, we successfully applied the In2O3@MoS2-2 sensor for oral disease and detection of food spoilage conditions, thereby providing new design insights for the development of portable exhaled gas sensors and gas sensors for evaluating food spoilage conditions at room temperature.
研究领域:
材料科学
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生物医学工程
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化学传感
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Zi-ang Zhang,Li-fan Nie,Quan Zhou,Zhi-Dan Song,Ge-bo Pan
The structure and morphology of gas-sensitive materials were extremely important to performances of gas sensor. In this work, ZnO nano-crystalline (ZnO NCs) was synthesized on foam-like GaN (F-GaN) by sol-gel method as gas-sensitive materials of H 2 S gas sensor. When ZnO NCs/F-GaN composite structure was used as gas- sensitive materials for detection of H 2 S with the concentration of 50 ppm at 220 °C. Importantly, rapid response and recovery time was 78 and 31 s, respectively. Enhancement of the sensing response was mainly attributed to the combination between ZnO NCs and F-GaN. In addition, a multiphase catalytic mechanism was proposed to description the catalytic role of F-GaN in the gas sensing procedure. These results further broadened the application of as-prepared metal oxide semiconductor based GaN in the gas sensing field.
研究领域:
材料科学
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传感器技术
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Xiang Li,Xueqian Wang,Li Yuan,Langlang Wang,Yixing Ma,You Wu,Yibing Xie,Rui Cao,Yiran Xiong,Ping Ning
The lengthy processes and cumbersome operations for the separate removal of COS and H 2 S have severely limited the development of blast furnace gas recycling process. CuO exhibits excellent H 2 S oxidation performance, but weak COS hydrolysis performance; in contrast, ZrO 2 shows the opposite trend. However, the functional combination of CuO and ZrO 2 has never been used for simultaneous removal of COS and H 2 S. In this study, a Cu/Zr co-doped K@TiO 2 bifunctional catalyst was tailored to simultaneously remove COS and H 2 S. The combined COS and H 2 S capacity of this catalyst reaches 340.5 mg/g at a low temperature of 60 °C, which is much higher than those of other reported bifunctional catalysts. The microcrystal structure formed by Cu/Zr co-doping increases the specific surface area of the catalyst and promotes the adsorption of COS/H 2 S. Specifically, Zr doping increases the content of moderate basic sites and significantly improves the hydrolysis efficiency of COS. Moreover, Cu doping induces lattice distortion of TiO 2 , while CuO captures 4 s valence electrons of K to form Cu 2 O. These two processes lead to the release of lattice oxygen from TiO 2 and CuO, generating oxygen vacancies and ·O 2 − , which promotes H 2 S oxidation. By proposing a simple route for the bifunctionalization of a desulfurization catalyst, this study drives innovation in both the theory and application of simultaneous removal of COS and H 2 S.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2022
·Vol. 24
·期 46
·28530-28539
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IF 3.945
Yong-Hui Zhang,Ying-Ying Li,Xuan-Yu Yang,Fei-Long Gong,Jun-Li Chen,Ke-Feng Xie,Hao-Li Zhang,Shao-Ming Fang
Metal oxide sensors face the challenge of high response and fast recovery at low operating temperatures for the detection of toxic and flammable hydrogen sulfide (H2S) gases. Herein, novel In-doped ZnO with a sunflower-like structure and tunable surface properties was rationally synthesized. The substitutional In atom in the ZnO crystal can dramatically enhance the concentration of oxygen vacancies (Ov), the In–ZnO sites are responsible for fast recovery, and the formation of sub-stable sulfide intermediates gives rise to the high response towards H2S. As a result, the response of the optimized 4In–ZnO sensor is 3538.36 to 50 ppm H2S at a low operating temperature of 110 °C, which is 106 times higher than that of pristine ZnO. Moreover, the response time and recovery time to 50 ppm H2S are 100 s and 27 s, respectively, with high selectivity and stability. First-principles calculations revealed that 4In–ZnO with rich Ov exhibited higher adsorption energy for the H2S molecule than pristine ZnO, resulting in effortless H2S detection. Our work lays the foundation for the rational design of highly sensitive gas sensors through precise doping of atoms in oxygen-rich vacancies in semiconductor materials.
研究领域:
材料科学
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化学传感器
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气体传感
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Qingqing Zhou,Long Yang,Zitong Kan,Jiekai Lyu,Ming Xuan Wang,Biao Dong,Xue Bai,Zhiyong Chang,Hongwei Song,Lin Xu
Using metal–organic frameworks (MOF) materials as a filter membrane is an innovative method to improve the selectivity of gas sensors by adjusting the size of the pores and cavities; however, the active surface and dynamic sensing processes are inevitably negatively affected. A facile but effective strategy was implemented in this work by integrating Co ions as catalysts into the inner three-dimensional ZnO skeleton and outer MOF filter membrane. The appropriate incorporation of Co cations was found to increase the surface area, facilitate the adsorption of oxygen species onto the zeolitic imidazolate framework (ZIF) surface, and promote the catalytic oxidation of H 2 S. In the optimised gas sensor, an enhanced response of H 2 S (260 to 5 ppm) and a low detection limit (70 ppb) at 180 °C were obtained because of the catalytic action of appropriate amounts of Co. In addition, beyond the molecular sieve effect to exclude interference from larger gas molecules, the incorporation of Co catalysts can adjust the number of base sites in the ZIF filter (from 1.592 to 3.325 mol/g), which further assists in avoiding basic-type interference from gas molecules with smaller kinetic diameters. As a result, a 130-fold increase in H 2 S selectivity (among various interfering gases) and a 54-fold increase (compared to the control sensor without Co) were obtained. Moreover, the sensor was demonstrated to be a powerful platform for assessing trace amounts of H 2 S in pesticide volatile gas identification and protein food quality evaluation.
研究领域:
材料科学
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化学传感器
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环境监测
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DOI
高影响因子
危险品化学品经营许可证（带存储）