JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Leixin Liu,Shanshan Yuan,Chenxi Guan,Jian Zhou,Yi Yao,Qiliang Zhang,Fangli Gang
Hydrogen sulfide (H 2 S), as a toxic gas, is one of the occupational hazards to workers' health. Traditional H 2 S sensors often suffer from external circuits, measurement systems, liquid-phase reactions, or high detection limits. Herein, a colorimetric sensor for H 2 S detection was developed by incorporating colorimetric dye [lead acetate, Pb(OAc) 2 ] into polyacrylamide (PAM)/polyvinyl alcohol (PVA) hydrogel. Benefitting from the interpenetrating polymer network, non-covalent interactions such as hydrogen bonds and dense internal structure, the hydrogel exhibited excellent adhesion to different substances (adhesion strength up to 14.11 kPa) and mechanical properties (tensile strength up to 116.92 kPa, elongation rate up to 576%). Furthermore, due to the liquid-phase reaction system and excellent [Pb(OAc) 2 ] loading capacity provided by the hydrogel, the prepared sensors exhibited excellent sensing performance response time, sensitivity, and simplicity. The theoretical detection limit of the sensor was 0.69 ppm, and the minimum exposure time required for detection was 14 s. The colorimetric effect of the hydrogels was positively correlated with the addition of Pb(OAc) 2 and the extension of time. The results showed that the color change of PAM/PVA/Pb(OAc) 2 hydrogel can be visible to the naked eye even if the concentration of H 2 S is only 1 ppm. It is expected that this hands-free, arbitrarily adhesive, stretchable hydrogel colorimetric sensor strategy for visual detection of H 2 S will extend toxic gas alarm systems to a new level.
研究领域:
材料科学
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环境科学
·
生物医学工程
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yan Qian,Haibang Zhang,Yan Xiong,Yinzuo Wu,Ziyue Fu,Pingchun Guo,Hedong Jiang,Jiake Li,Yanxiang Wang,Shijin Yu,Hua Zhu
The detection of low concentration hydrogen sulfide (H 2 S) gas is of paramount importance for environmental safety and human health, given its colorless, toxic, and flammable nature. In this study, heterostructure material composed of SnO 2 nanorods modified with NiO nanosheets were synthesized, which significantly improved the detection performance of the sensor for hydrogen sulfide (H 2 S) gas at low temperatures by combining the interaction between oxygen vacancies and built-in electric fields. The formation of heterojunctions was verified using X-ray diffraction (XRD) and transmission electron microscopy (TEM), and the existence of oxygen vacancies was further confirmed through electron paramagnetic resonance (EPR) spectroscopy. The heterojunction sensor, when modified with 3 mol% NiO, exhibited an exceptional response value of 386 towards 10 ppm H 2 S at 125 °C, with a rapid response time of 6 s, surpassing that of the pristine SnO 2 sensor. This superior performance can be attributed to the synergistic effect of oxygen vacancies between SnO 2 and NiO, along with the inherent electric field present in the heterojunction. The study showcases the remarkable selectivity and long-term stability of this sensor in detecting hydrogen sulfide gas, offering innovative insights for the advancement of low-temperature and highly sensitive H 2 S gas sensors.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Yulan Zeng,Xinyang Wang,Zhonghui Chen,Fang Luo,Bin Qiu,Fengfu Fu,Jian Wang,Zhenyu Lin
Real time detection of hydrogen sulfide (H2S) in deep brain regions is of great significance. Photoelectrochemical (PEC) biosensors hold promise for real-time monitoring but low sensitivity due to the use of small electrode restrained its application. In this study, a miniaturized sensor that integrates organic photoelectrochemical transistors (OPECTs) with optical fiber (OF) microelectrodes was designed for the first time, which can amplify the small PEC signal into large channel current change. A conductive gold layer and cuprous oxide nanoparticles (Cu2O NPs) were sequentially deposited onto the OF, followed by a Nafion polymer coating to enhance anti-interference capabilities. Cu2O reacts with H2S to generate Cu2S. The resulting Cu2O/Cu2S heterojunction induces changes in the PEC signal and channel current. Compared to a conventional PEC system, the OPECT sensor has higher sensitivity and lower detection limit, enabling monitoring of H2S concentration fluctuations within the rat brain, which demonstrates the approach’s capability for highly sensitive in vivo biomarker detection.
研究领域:
生物医学工程
·
神经科学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Honghong Yi,Kai Chen,Hongkun Ni,Yiming Ma,Xiaolong Tang,Qingjun Yu,Fengyu Gao,Shunzheng Zhao
This study employs a synergistic strategy of Zn doping and KOH etching to precisely regulate the physicochemical properties of CeO 2 , significantly enhancing its H 2 S catalytic oxidation performance. Experimental results indicate that Zn doping induces lattice expansion of CeO 2 , while KOH etching further removes Zn, increases Ce 3+ and oxygen vacancy concentrations, thereby optimizing surface acidity-basicity and redox capability. The obtained E-Zn/CeO 2 material exhibits excellent H 2 S conversion, reaction and kinetics, while promoting the selective formation of SO 2 . Mechanistic studies reveal that H 2 S undergoes adsorption and dissociation via μ 2 -OH/–COOH groups on the material surface, with the oxidation process following the MvK mechanism, where oxygen vacancies play a key role in adsorption and lattice oxygen transfer. Theoretical calculations further demonstrate that the synergistic modification induces reconstruction of the electronic structure of CeO 2 , including weakened covalency of Ce O bonds and a spin-state transition of O 2p orbitals, which significantly reduces the oxygen vacancy formation energy (as low as −1.47 eV) and enhances structural stability. This work provides both experimental and theoretical foundations for the rational design of highly efficient H 2 S catalytic materials.
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DOI
高影响因子
VACUUM
·
2023
·
IF 4
Zhen Zhao,Lei Zhang,Yinghua Zhuang,Yang Guo,Hongming Zhang,Wanli Jiao
To achieve rapid detection of hydrogen sulfide (H 2 S) gas at lower temperatures, We present a high-performance PdO/ZnO/ZnS-based H 2 S gas sensor, which was synthesized using a hydrothermal synthesis method in conjunction with an in situ sulfuration process and surface modification by PdO. Vacuum sintering to prevent high temperature oxidation of ZnS. The introduction of PdO not only makes the sheet ZnO/ZnS turn to spherical-like, but also increased the content of adsorbed oxygen. Compared with ZnO/ZnS sample, the PdO/ZnO/ZnS based sensor exhibited a higher response value of 212.4 to 10 ppm H 2 S at lower temperature of 100 °C, with response and recovery times of 2.9 and 1.7 min, respectively. In addition, excellent performance is demonstrated in terms of gas selectivity , repeatability and long-term stability during testing.
研究领域:
材料科学
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化学传感器
·
环境监测
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Tianhong Zhou,Yang Wang,Yingmin Liu,Yuhan Cao,Xinye Shao,Ruimiao Song,Minglong Sun,Shijie Wang,Mojie Sun
Hydrogen sulfide (H 2 S) is a highly toxic, corrosive and flammable gas. Therefore, real-time and low-power monitoring under room temperature conditions is of great significance. However, room-temperature chemical resistance sensors usually have weak signal outputs and are susceptible to humidity and coexisting gases, which remain the main challenges in practical applications. To address these issues, we developed a heterojunction-assisted, phase-change-based sensing platform. Through a two-step solvothermal method, a chemical resistance sensor based on flower-like In 2 O 3 was constructed, with uniformly covered highly dispersed CuO nanoclusters on the surface. The optimized 4.5 wt% CuO/In 2 O 3 composite exhibits an exceptional response (18,108) to 10 ppm H 2 S at 25°C, along with a detection limit as low as 10 ppb and a rapid response time of 4 s. Notably, the sensor maintains a robust response of 603 even at 80% relative humidity and demonstrates outstanding selectivity against CO and NH 3 (10 ppm) as well as typical volatile organic compounds (1000 ppm). This remarkable performance arises from a dual sensitization mechanism: the p-n junction establishes a high-resistance baseline via interfacial charge redistribution, while H₂S exposure triggers an in-situ CuO→CuS phase transition that collapses the junction barrier and produces a pronounced resistance drop. Density functional theory calculations further corroborate preferential H 2 S adsorption and strong Cu-S bond formation, supporting the proposed chemical-switching pathway. These results highlight a heterojunction-assisted phase-transition strategy for reliable, low-power, and humidity-tolerant H 2 S monitoring under practical hazardous conditions.
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Catalysts
·
2018
·Vol. 8
·期 8
·317
·
IF 3.465
Kejie Xuan,Xinbo Zhu,Yuxiang Cai,Xin Tu
In this work, plasma-catalytic removal of H2S over LaxMnO3(x= 0.90, 0.95, 1, 1.05 and 1.10) has been studied in a coaxial dielectric barrier discharge (DBD) reactor. The non-stoichiometric effect of the LaxMnO3catalysts on the removal of H2S and sulfur balance in the plasma-catalytic process has been investigated as a function of specific energy density (SED). The integration of the plasma with the LaxMnO3catalysts significantly enhanced the reaction performance compared to the process using plasma alone. The highest H2S removal of 96.4% and sulfur balance of 90.5% were achieved over the La0.90MnO3catalyst, while the major products included SO2and SO3. The missing sulfur could be ascribed to the sulfur deposited on the catalyst surfaces. The non-stoichiometric LaxMnO3catalyst exhibited larger specific surface areas and smaller crystallite sizes compared to the LaMnO3catalyst. The non-stoichiometric effect changed their redox properties as the decreased La/Mn ratio favored the transformation of Mn3+to Mn4+, which contributed to the generation of oxygen vacancies on the catalyst surfaces. The XPS and H2-TPR results confirmed that the Mn-rich catalysts showed the higher relative concentration of surface adsorbed oxygen (Oads) and lower reduction temperature compared to LaMnO3catalyst. The reaction performance of the plasma-catalytic oxidation of H2S is closely related to the relative concentration of Oadsformed on the catalyst surfaces and the reducibility of the catalysts.
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高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Lijuan Wang,Fubang Liang,Yushuang Shang,Xu Liu,Meng Yin,Jian Shen,Jiang Yuan
Vascular complications caused by diabetes impair the activities of endothelial nitric oxide synthase (eNOS) and cystathionine γ-lyase (CSE), resulting in decreased physiological levels of nitric oxide (NO) and hydrogen sulfide (H2S). The low bioavailability of NO and H2S hinders the endothelialization of vascular grafts. In this study, endothelium-mimicking bilayer vascular grafts were designed with spatiotemporally controlled dual releases of NO and H2S for in situ endothelialization and angiogenesis. Keratin-based H2S donor was synthesized and electrospun with poly(l-lactide-co-ε-caprolactone) (PLCL) as the outer layer of the graft to release H2S. Hyaluronic acid, one of the major glycosaminoglycans in endothelial glycocalyx, was complexed with Cu ions as the inner layer to mimic glutathione peroxidase (GPx) and maintain long-term physiological NO flux. The synergistic effects of NO and H2S of bilayer grafts selectively promoted the regeneration and migration of human umbilical vascular endothelial cells (HUVECs), while inhibiting the overproliferation of human umbilical artery smooth muscle cells (HUASMCs). Bilayer grafts could effectively prevent vascular calcification, reduce inflammation, and alleviate endothelial dysfunction. The in vivo study in a rat abdominal aorta replacement model for 1 month showed that the graft had a good patency rate and had potential for vascular remodeling in situ.
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PubMed
高影响因子
CLINICAL AND EXPERIMENTAL PHARMACOLOGY AND PHYSIOLOGY
·
2016
·Vol. 43
·期 5
·562-568
·
IF 2.004
Ailin Xiao,Jing Li,Tianjian Liu,Zhuxi Liu,Chuanfei Wei,Xiaomeng Xu,Qin Li,Jingxin Li
Summary Hydrogen sulphide (H 2 S) is generated endogenously from l -cysteine ( l -Cys) by the enzymes cystathionine- β -synthase (CBS) and cystathionine- γ -lyase (CSE). In addition, l -Cys is commonly used as a precursor in the food and pharmaceutical industries. The aim of the present study is to determine whether l -Cys regulates intestinal nutrient transport. To that end, the presence of CBS and CSE in the jejunum epithelium was assessed by immunohistochemistry, Western blotting and the methylene blue assay. In addition, in vivo l -Cys (100 mg/kg, administered immediately after the glucose load) significantly increased blood glucose levels 30 min after the oral administration of glucose to mice. This effect of l -Cys was completely blocked by amino-oxyacetic acid (AOA; 50 mg/kg; administered at the same time as l -Cys) an inhibitor of CBS. Measurements of the short-circuit current ( I sc ) in the rat jejunum epithelium revealed that l -Cys (1 mmol/L; 6 min before the administration of l -alanine) enhances Na + -coupled l -alanine or glucose transport, and that this effect is inhibited by AOA (1 mmol/L;10 min before the administration of l -Cys), but not d , l -propargylglycine (PAG;1 mmol/L; 10 min before the administration of l -Cys), a CSE inhibitor. Notably, l -Cys-evoked enhancement of nutrient transport was alleviated by glibenclamide (Gli;0.1 mmol/L; 10 min before the administration of l -Cys), a K + channel blocker. Together, the data indicate that l -Cys enhances jejunal nutrient transport, suggesting a new approach to future treatment of nutrition-related maladies, including a range of serious health consequences linked to undernutrition.
研究领域:
营养学
·
药理学
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生理学
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胃肠病学
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DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Xiaona Huang,Hao Zhang,Xuguang Wang,Xiutian Yang,Rongzhuang Lin,Fan Zhang,Ying Liu,Kun Xu,Chao Zhou,Pixin Wang
During cementing construction, H 2 S gas leak from micro-cracks of cement ring or cementing interface, seriously damaging wellbore integrity and shortening the life of wells. Therefore, microcrack self-healing cement technology is of great significance for oil wells to maintain the durability of cement rings and adapt to complex underground environments. Herein, acrylamide (AM), acrylonitrile (AN) and N-vinylformamide (NVF) were used as functional monomers , and laponite was added to prepare Laponite-poly(acrylamide-acrylonitrile-n-vinylformamide) nanocomposite hydrogel (L-PMAN) with excellent mechanical strength as micro-crack repair agent for gas-triggered cementing cement sheath. Considering the difference of chemical environment in the process of wellbore cement slurry sealing and subsequent micro-fracture plugging, different structural units were selected to design amphoteric structure. The construction of zwitterionic structure makes it exhibit excellent swelling behavior in salt solution while maintaining 80% of the original mechanical strength. More importantly, after adding L-PMAN powder,cement stone (C 1 ) can achieve good repair of microcracks under the trigger of H 2 S within 3 days, and the maximum gas breakthrough pressure can reach 2.5 MPa, indicating the great potentials of the L-PMAN for plugging microcracks in cement sheath.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Kunlin Li,Xueyan Chen,Jianghao Zhang,Min Chen,Xiaoxiao Qin,Fei Wang,Kai Li,Jinhou Fang,Changbin Zhang
Regenerable materials with abundant basic sites and sulfur storage space are highly desirable for the removal of H 2 S. In this work, we synthesized a flower-like MgO/Carbon material by one-step carbonization of magnesium gluconate and applied it for H 2 S oxidation at room temperature. The results demonstrate that the high content of MgO and super-hydrophilic surface of the MgO/Carbon provide abundant basic sites for the adsorption and dissociation of H 2 S. Moreover, carbon defects and a well‐developed pore structure offer active sites for the desulfurization reaction and large space for storage of sulfur products. Consequently, the MgO/Carbon materials exhibit excellent H 2 S oxidation performance, which is far superior to that of commercial activated carbon. In addition, the MgO/Carbon materials show extraordinary regeneration capacity and maintain their high performance even after 5 cycles of desulfurization/regeneration. Furthermore, mechanisms for the H 2 S oxidation process, deactivation and regeneration are proposed based on the experimental and characterization results. Considering the simple preparation process, excellent desulfurization and regeneration performance of as-prepared MgO/Carbon material, our findings provide a new strategy for the design of efficient desulfurizers.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Chao Duan,Chun Tang,Shan Yu,Lina Li,Jinjin Li,Ying Zhou
Decreasing energy consumption of water splitting strategy by replacing oxygen evolution reaction (OER) with more facile sulfide oxidation reaction (SOR) to H 2 evolution and value-added sulfur products is a promising technology. Nevertheless, the unsatisfactory catalyst long-term stability and passivation issues substantially limit the overall productivity. Herein, we report an anti-sulfuretted NiSe nanowire array catalyst on nickel foam (NiSe/NF), this catalyst exhibits a significantly reduced anode potential of 0.49 V vs. RHE at 100 mA cm −2 compared to the oxygen evolution reaction (1.78 V vs. RHE) and remains admirable stability for more than 500 h without passivation. Particularly, the skillful combination of UV–vis, in situ Raman, and attenuated total reflection Fourier transform infrared spectra, we reveal that S 2- /HS - has been selectively converted to S n 2- and by-product S 2 O 3 2- rather than sulfur, which avoids long-perplexing passivation issue of solid sulfur. For the first time, we demonstrate the feasibility of the system (SOR + HER) in a commercial membrane electrode assembly stack, which affords 19.0 mL min −1 H 2 at a low cell voltage of 1.0 V with consuming the electricity of 2.63 kWh Nm −3 H 2 . This work provides a new avenue for low-cost H 2 production by H 2 S electrooxidation desulfurization.
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高影响因子
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