Chemosensors
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2025
·Vol. 13
·期 7
·239
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IF 3.7
Hongtao Wang,Yang Liu,Yuanchao Xie,Jianan Ma,Dan Han,Shengbo Sang
Mesoporous ZnO/ZnCo2O4nanocomposites with excellent gas-sensing performance were synthesized using the Ostwald ripening method. The as-prepared ZnO/ZnCo2O4comprised aggregated monodisperse nanoparticles, and the nanoparticle size grew with increasing thermal treatment temperature. Increasing the calcination temperature did not significantly change the overall size of the ZnO/ZnCo2O4nanocomposites, but the pore size and specific surface area were noticeably affected. The gas-sensing results showed that ZnO/ZnCo2O4composites calcined at 500 °C exhibited the highest response to H2S at 200 °C, with a detection limit of 500 ppb. The ZnO/ZnCo2O4composites also exhibited remarkable selectivity, response/recovery speed, and stability. Their excellent gas-sensing performance might be attributed to their porous structure, large specific surface area, and the heterogeneous interface between ZnO and ZnCo2O4. This work not only represents a new example of the Ostwald ripening-based formation of inorganic hollow structures in a template-free aqueous solution but also provides a novel and efficient sensing material for the detection of H2S gas.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Chunying Liu,Li Lv,Kun Liu,Junsu Jin,Jianguo Mi,Yongqiang Ren,Shisen Xu
By coupling CALF-20 on ZIF-7 via in situ crystallization in the confined micrometer-sized pores of poly(acrylates), a novel composite, namely, CALF-20-on-ZIF-7@poly(acrylates), has been synthesized for the simultaneous removal of CO2 and H2S from IGCC feed gas. Within this coupled crystal, CALF-20, known for its strong adsorption capacity and excellent stability toward CO2 and H2S, serves as the outer layer crystal to shift the adsorption/desorption hysteresis loop of inner ZIF-7 to beyond atmosphere pressure. Under high pressure, CO2 and H2S are automatically adsorbed. Upon reducing the pressure to the atmospheric level, CO2 is automatically released, while H2S remains temporarily due to its high adsorption energy. After about 150 cycles of CO2 adsorption/desorption of the kilogram-scale composite, H2S approaches saturation and is then removed by vacuuming. Since the content of H2S in IGCC feed gas is trivial, the total energy consumption for the composite regeneration is 0.16 MJ/kg (CO2). After 600 consecutive cycles, the CO2 adsorption capability of the composite decreases by 0.41%, demonstrating excellent cyclic stability.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2022
·
IF 11.072
Qian Liang,Linhua Jiang,Ning Duan,Fuyuan Xu,Hongping He
With continuous impelling of the Belt and Road Initiative, China has been cooperating with Belt and Road (B&R) countries in copper smelting . The large amount of highly acidic wastewater generated in copper smelter that is rich in arsenic (As) should be removed prior to recovery. The sparged H 2 S is used for As precipitation in the actual treatment, but is among the first found to be defective in performance fluctuation. This phenomenon is evidenced in this study that As concentrations of 60% samples obtained from the sulfuration tank are above the enterprise upper limit of 20 mg/l. Consistent with the performance fluctuation, our laboratorial investigation shows that the maximum As removal efficiency is only about 50%. Based on this issue that existed in the actual copper smelting, the inherent mechanism is explored. Experiments show that the H 2 S escape and As 2 S 3 re-dissolution are two main reasons, which are other meaningful findings of this study. The limited height of sulfuration tank leads to the incomplete utilization of sparged H 2 S. The existing Cu 2+ causes up to 21.5% of the generated As 2 S 3 to be re-dissolved. Strategies are put forward from two aspects to favor the As removal, namely increasing the height of sulfuration tank to extend the contact between H 2 S and wastewater, and timely discharge of precipitated sludge to prevent As 2 S 3 re-dissolution. This study provides China's solution to promote cleaner production in copper smelters, which benefits the copper smelting industry in both China and B&R countries.
研究领域:
环境科学
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冶金工程
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DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Huijuan Chen,Li Lv,Kaifeng Xue,Pinhua Zhang,Lulu Du,Guangliang Cui
Developing a portable and compact sensor for room temperature detection of H2S in exhaled breath for health assessment presents considerable technical challenges. This work successfully synthesized Cu2O/ZnO heterostructures with excellent gas sensitivity to H2S at room and lower temperatures using a two-dimensional (2D) electrodeposition in situ assembly method with the application of a semisine wave voltage as well as CuZnO nanoarrays deposited under direct current voltage. The Cu2O/ZnO heterostructure sensors, with high response of 8.53 × 104 to 1 ppm of H2S and a minimum detection limit of 10 ppb at room temperature, exhibit a response of 42 for 10 ppm of H2S even at −20 °C, and its response to 50 ppm of H2S is approximately 3774 times greater than that of the CuZnO sensor, which is a significant challenge to achieve with sensors based on oxygen adsorption/desorption mechanisms. These outstanding gas-sensing properties are attributed to the formation of p–n heterojunctions in the Cu2O/ZnO heterostructures and the occurrence of the sulfuration reaction. In addition, we successfully employed the Cu2O/ZnO sensor to detect H2S in human exhaled breath, offering valuable insights for the monitoring of various chronic diseases and new directions for the development of portable room-temperature breath sensors.
研究领域:
材料科学
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医学诊断
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Riyi Lin,Kai Chen,Mingqiang Miao,Liqiang Zhang,Xinwei Wang,Ye Jiang,Jianliang Zhang,Yue Wang,Huida Pan
The generation of H2S causes many problems during steam injection thermal recovery. To make clear the formation rule of H2S under the condition of steam injection thermal recovery, tetrahydrothiophene was selected as a model compound, and then reaction mechanism and kinetics were explored based on indoor thermal simulation. The results showed that tetrahydrothiophene aquathermolysis reaction can generate a large amount of H2S. The C–S bond formed by heteroatom S broke at first and then opening-ring occurred, which produced small molecular alkanes or alkenes. The decarbonylation of aldehydes and other organic compounds resulted in the formation of CO, hydrocarbons, and other related compounds. High-temperature water played a key role in the process of tetrahydrothiophene aquathermolysis reaction and would directly participate in the elementary reactions such as hydrolysis and water–gas shift reaction (WGSR). These elementary reactions would finally lead to the migration of hydrogen from water to gas-phase or liquid-phase products. In addition, a kinetic model of H2S formation during tetrahydrothiophene aquathermolysis reaction was established through kinetic experiments, the activation energy is 54.55 kJ/mol, and the frequency factor is 166.47 day–1.
研究领域:
石油工程
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Hairui Fang,Hong Chen,Feng Zhang,Rong Tan,Chenshuai Han,Xin Ai,Xiao Ma,Yiwen Cui,Dong Wang
Sulfur hexafluoride (SF 6 ) from Gas Insulated Switchgear (GIS) will decompose and produce hydrogen sulfide (H 2 S) in the event of equipment failure. Therefore, the detection of H 2 S can determine whether the equipment has malfunctioned. Due to the low concentration of the SF 6 decomposition product H 2 S and its application in industrial environments, sensors must have a low detection limit and rapid response time . Considering that the oxides of rare earth elements can improve the sensing characteristics, praseodymium oxide (Pr 6 O 11 )-indium oxide (In 2 O 3 ) was prepared. The impact of Pr 6 O 11 doping on In 2 O 3 was investigated through characterization methods. To validate its feasibility for use in GIS, the best sensor (F3) exhibits good sensing characteristics for H 2 S in the SF 6 and air ambient. The responses to 10 parts per million (ppm) H 2 S at 190°C were 146.6 in SF 6 and 190.8 in air. In SF 6 ambient, the F3 sensor demonstrated a low detection limit (50 parts per billion (ppb)). The good sensing characteristics are attributed to the doping of rare earth elements, which induces an increase in the proportion of defect oxygen and accelerate the chemical reaction. The sensing characteristics of the material can be attributed to the doping of Pr 6 O 11 and the electronic effect. This study provides a novel approach for detecting H 2 S generated from SF 6 decomposition.
研究领域:
材料科学
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电气工程
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传感器技术
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产品关联
DOI
高影响因子
Pharmaceutics
·
2023
·Vol. 15
·期 10
·2443
·
IF 5.4
Xinqiang Liang,Mekhrdod S. Kurboniyon,Yuanhan Zou,Kezong Luo,Shuhong Fang,Pengle Xia,Shufang Ning,Litu Zhang,Chen Wang
Traditional treatment methods for tumors are inefficient and have severe side effects. At present, new therapeutic methods such as phototherapy, chemodynamic therapy, and gasodynamic therapy have been innovatively developed. High concentrations of hydrogen sulfide (H2S) gas exhibit cancer-suppressive effects. Herein, a Prussian blue-loaded tetra-sulfide modified dendritic mesoporous organosilica (PB@DMOS) was rationally constructed with glutathione (GSH)-triggered/photothermal-enhanced H2S signaling molecule release properties for gas therapy. The as-synthesized nanoplatform confined PB nanoparticles in the mesoporous structure of organosilica silica due to electrostatic adsorption. In the case of a GSH overexpressed tumor microenvironment, H2S gas was controllably released. And the temperature increases due to the photothermal effects of PB nanoparticles, further enhancing H2S release. At the same time, PB nanoparticles with excellent hydrogen peroxide catalytic performance also amplified the efficiency of tumor therapy. Thus, a collective nanoplatform with gas therapy/photothermal therapy/catalytic therapy functionalities shows potential promise in terms of efficient tumor therapy.Keywords:gas therapy;H2S;GSH-triggered;Prussian blue;dendritic mesoporous organosilica
研究领域:
肿瘤学
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纳米医学
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生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Yan Zhu,Yameng Gao,Wenke Wang,Wenjie Kan,Caiguo Tang,Lifang Wu
Fusarium graminearum ( F. graminearum ) poses a substantial threat to global food security, with its impact closely linked to environmental conditions. This study aims to anticipate F. graminearum spore growth across diverse environments and assess alterations in the fungistatic capacity of hydrogen sulfide (H 2 S) gas in response to environmental variations. The experimental data, namely spore germination ratios, are monitored and recorded at hourly intervals across 100 permutations comprising four distinct temperature levels, five varying pH values, and five diverse concentrations of H 2 S. The investigation integrates three environmental factors as input variables, utilizing a feedforward neural network to establish growth boundaries based on spore germination ratios. The accuracy of models at various stages–training, validation, and testing–is evaluated using a confusion matrix. Logistic regression models are employed for effectiveness comparison with neural networks. Results indicate that neural networks successfully predict F. graminearum spore germination events. Notably, H 2 S does not influence the temperature preferences of spores. Temperature has a more substantial impact on the fungistatic ability of H 2 S compared to pH. The study reveals the adaptability of F. graminearum spores to adverse conditions over time. This research delves into temperature, pH, and H 2 S synergistic effects on spore germination, contributing to predictive models for F. graminearum and enhancing our understanding of how environmental factors regulate its growth.
研究领域:
微生物学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zongxu Liu,Jiaxue Song,Tao Wang,Huaiqiang Liu,Jie Chen,Yuanyuan Sun,Pinhua Zhang,Guangliang Cui
Technology development of low-concentration H 2 S sensing at low temperatures is of great significance for real-time surveillance of specific diseases and environment. In this work, a new Cu 2 O/graphene heterojunction sensor with an ideal interface is fabricated by 2D electrodeposition in-situ assembly method. The sensor is extremely selective to H 2 S and exhibits ultra-high H 2 S sensing properties at room temperature (R = 24125.785 % for 500 ppb H 2 S). Notably, the synergistic effects of barrier modulation and the sulfide reaction enable the sensor to detect H 2 S at concentrations as low as 5 ppb (R = 386 %) at 20 °C. Moreover, it exhibited good gas sensitivity even at temperatures as low as −20 °C (R = 71.26346 % for 100 ppb H 2 S). Furthermore, a sensor device was successfully manufactured for practical detection, which could be used for rapid detection of exhaled air and atmospheric monitoring. This work provides a new strategy for the design of high-sensitive and reliable room-temperature sensing materials for trace H 2 S gas detection.
研究领域:
材料科学
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环境科学
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医学检测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·
IF 3
Li Ouhang,Wang Bo,Liu Yong,Gao Xinxin,Zhang Kan,Sun Peng,Liu Fangmeng,Lu Geyu
The sensitive and selective detection of ppb-level (ppb: parts per billion) H 2 S using miniaturized and portable gas sensor is of great significance in environmental monitoring, medical diagnosis and many other fields. MXenes, with high electrical conductivity, large surface area, and abundant active sites, hold great promise for room temperature gas sensing applications. In this work, a room temperature H 2 S sensor was constructed utilizing Mo 2 CT x MXene sensitive material, synthesized by a typical LiF/HCl etching method. The H 2 S sensing characteristics of Mo 2 CT x sensor were further improved by controlling ultrasonic time and optimizing heat-treated temperature. The M-50 sensor utilizing optimized Mo 2 CT x sensing material exhibited good selectivity, the highest response value (−39.92%) to 1 ppm (ppm: parts per million) H 2 S, and the lowest detection limit of 30 ppb (theoretically 0.35 ppb). The enhanced H 2 S sensing properties are largely attributed to the fragmented nanosheet structure and surface defects caused by prolonging ultrasonic time and adjusting treatment temperature. Additionally, density functional theory (DFT) calculations demonstrated that surface Mo atom vacancy and edge of Mo 2 CT x could significantly improve the adsorption ability of H 2 S. The present work contributes to advancing exploration of Mo 2 CT x material in sensing applications.
研究领域:
材料科学
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环境监测
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医学诊断
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Chengyu Yang,Ying Yang,Chengxin Zhang,Hui Yu,Tingting Wang,Keying Shi,Zhuanfang Zhang,Dongjie Wang,Xiangting Dong
In this paper, a simple method to synthesize Ag-doped Fe 2 O 3 hollow nanofibers by electrospinning was reported. The synthesized samples were fabricated into gas sensors, and their sensing properties were studied systematically. The results showed that the Ag-doped Fe 2 O 3 materials were hollow tubular structures and had high response (R a /R g = 19.43), selectivity and sensitivity to H 2 S at room temperature. The response mechanism of the sensor to H 2 S was studied by DFT, O 2 -TPD and H 2 -TPR. It was considered that the excellent gas sensing performance of the sensor was that the Ag-dopant increased the concentration of carriers, adsorbed oxygen and lattice oxygen. The rough hollow structure was conducive to gas adsorption and capture, which provided many active centers for the sensing reaction. Therefore, the Ag-doped Fe 2 O 3 nanofibers with hollow structure will have promising uses as sensing material in future applications.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Yu Chen,Xin Guo,Fan Wu,Yu Huang,Zhanchi Yin
Hematite (α-Fe 2 O 3 ) has been proved to be a promising sorbent for mercury removal in various situations. The mercury removal performance of α-Fe 2 O 3 was investigated using a simulated coal gasification syngas containing Hg 0 , N 2 , HCl, and/or H 2 S, a series of experiments were designed with HCl and H 2 S separately and both employed. For a better understanding in the interaction between HCl and H 2 S in mercury removal, the differences in mercury oxidation were demonstrated on the basis of density functional theory calculations. The rate-limiting step in HgCl 2 formation is Hg 0 → HgCl with the energy barrier of 139.47 kJ/mol, but for H 2 S in mercury oxidation, the generation of active sulfur species is the key step and the rate-limiting step is detachment of second H with an energy barrier of 57.53 kJ/mol. Experimental results point that HCl has inhibition on H 2 S for mercury removal, it may be ascribed to the competition of active Fe sites on Fe 2 O 3 . Conversely, HCl contributes to the mercury oxidation at high temperature while H 2 S has a limit effect at elevated temperature.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）