ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jiayu Feng,Fei Wang,Chi Wang,Kai Li,Xin Sun,Ping Ning
In this study, an NH3 plasma-treated Cu/HZSM-5 sorbent was introduced to simultaneously remove H2S and PH3 in low-temperature and low-oxygen environments. The effects of the Cu loading amounts, modification methods, and plasma-treatment conditions on the adsorption–oxidation performance of the sorbents were investigated. From the performance test results, the sorbent treated by NH3 plasma with the specific energy input (SEI, electrical input energy to the unit volume of gas) value of 1 J·mL–1 (Cu/HZSM-5-[S1]) was identified as having the highest breakthrough capacities of 108.9 mg S·g–1 and 150.9 mg P·g–1 among all of the materials tested. After three times of regeneration, the sorbent can still maintain the ideal performance. The results of Fourier transform infrared (FT-IR) spectroscopy and CO2 temperature-programmed desorption (CO2-TPD) indicated that the NH3 plasma treatment can introduce amino groups (functional groups) onto the sorbent surface, which greatly increases the number and strength of the basic sites on the sorbent surface. Results of N2 adsorption/desorption isotherms and scanning electron microscopy–energy dispersive spectroscopy (SEM–EDS) showed that the morphology of the sorbent changed after the plasma treatment, which exposed more active sites (copper species). In situ IR spectra showed that the amino groups are continuously consumed during the reaction process, indicating that these amino groups can help sorbents to capture gas molecules. Moreover, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses indicated that CuO is the main active species and the consumption of CuO and accumulation of the reaction products on the surface and inner pores of the sorbent are the primary reasons for the deactivation of the sorbent.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Leipeng Ji,Zhisong Liu,Zihao Li,Wenjun Huang,Haomiao Xu,Zan Qu,Naiqiang Yan
The gypsum from flue gas desulfurization or the neutralization (D/N gypsum) process of acid wastewater, is an industrial by-product in nonferrous metal smelters. The S and Ca sources of D/N gypsum have significant application prospects. However, the S(IV) reduction is difficult due to the electronic inactivity of CaSO 4 and the stability of the S-O band. Our experimental results indicated that the start-up temperature of CaSO 4 reduced by CH 4 is 900 ℃. However, adding H 2 S gas with a H 2 S/CaSO 4 (S/Ca) ratio of 0.2, the start-up temperature of CaSO 4 reacted with CH 4 decreases to 650 ℃. With the increase of the S/Ca ratio from 0.04 to 0.2, the yield of CaS increased to 94.97%, and the selectivity toward CO 2 formation increases to 71.67%. In-situ diffuse reflectance Fourier transformations spectroscopy (in-situ DRIFTs) results indicate that adding H 2 S generates the new sulfide groups on the surface of CaSO 4 , resulted from the S(-II) in H 2 S changing the distribution of valence electrons of O and activating O. Moreover, the density functional theory (DFT) calculation results exhibit that the activation energy for the first O dissociation decreases to 2.89 eV in the presence of H 2 S. Furthermore, H 2 S optimized the reaction path of CH 4 and improved the selectivity toward CO 2 formation. Comparing to 1000 ℃ without H 2 S, under 800 ℃ with H 2 S, the consumption of CH 4 reduces to 45%, and the CO 2 selectivity increases to 71.67%. Thus, we have developed a method of CaSO 4 low-temperature reduction and provide a theoretical basis for its application in engineering.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2020
·Vol. 56
·期 4
·601-611
·
IF 0.405
Zhang Yihang,He Miao,Song Jianjian,Xu Mingbiao,Xu Peng
Carbonate reservoirs in Asmari block of Missan oilfield are characterized by complex geological characteristics. Temporary plugging is commonly used for effective damage control caused by the working fluid when drilling in such complex multi-pressure reservoirs and for preventing leakage, blowout, and collapse in long open hole wells. In this paper a new temporary plugging drilling fluid formulation system is proposed, designed for the low permeability carbonate reservoir containing H 2 S and CO 2 in the target block. The system contains a specially designed acid-soluble temporary plugging agent DSK-1 combined with HCOONa and modified biopolymer VS-A flow pattern regulator; modified starch water loss reduce agent, and DSP antioxidant. The parameters of the system, including temperature stability, resistance to formation water pollution, inhibition capacity, and stability to acids and acid gases, were evaluated in a series of experimental tests. The plugging ability was evaluated by experiments on cores received from the target block. The results showed that the plugging removal and recovery rate of the drilling fluid system was up to 86.3%, which can effectively meet the target requirements, and provide guidance and reference for the follow-up study of temporary plugging in low permeability carbonate reservoirs.
研究领域:
石油工程
·
地质学
✓ 已验证
DOI
高影响因子
BMC PLANT BIOLOGY
·
2024
·Vol. 24
·期 1
·1-14
·
IF 4.3
Dai Jingcheng,Wen Dingxin,Li Hao,Yang Jingpeng,Rao Xiongfei,Yang Yong,Yang Jiangke,Yang Chunlei,Yu Jun
Background Hydrogen sulfide (H 2 S) is a novel signaling molecule involved in the growth and development of plants and their response to stress. However, the involvement of H 2 S in promoting the growth and development of tobacco plants is still unclear. Results In this study, we explored the effect of pre-soaking or irrigating the roots of tobacco plants with 0.0, 2.0, 4.0, 6.0, and 8.0 mM of sodium hydrosulfide (NaHS) on endogenous H 2 S production, antioxidant enzymatic and cysteine desulfhydrase activities, seed germination, agronomic traits, photosynthetic pigments contents, and root vigor. The results revealed that exogenous NaHS treatment could significantly promote endogenous H 2 S production by inducing gene expression of D/L-CD and the activities of D/L-CD enzymes. Additionally, a significant increase in the agronomic traits and the contents of photosynthetic pigments, and no significant difference in carotenoid content among tobacco plants treated with 0.0 to 8.0 mM of NaHS was observed. Additionally, a significant increase in the germination speed, dry weight, and vigor of tobacco seeds, whereas no significant effect on the percentage of seed germination was observed on NaHS treatment. Furthermore, NaHS treatment could significantly increase the activity of superoxide dismutase (SOD) and peroxidase (POD) enzymes, which reduces damage due to oxidative stress by maintaining reactive oxygen species homeostasis. Conclusions These results would aid in enhancing our understanding of the involvement of H 2 S, a novel signaling molecule to promote the growth and development of tobacco plants.
研究领域:
植物学
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植物生理学
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分子生物学
·
农学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Diming Zang,Xiangyang Wei,Qingyuan Liu,Ying Li,Rui You
The detection of hydrogen sulfide (H 2 S) plays a critical role in environmental monitoring and breath analysis for medical diagnostics. For metal oxide semiconductor film-based gas sensors, the quality of the gas-sensitive material and the method of forming the gas-sensitive film on planar electrodes are critical determinants of sensor performance. In this study, a flower-like ZnO@ZnWO 4 heterojunction was directly grown on the surface of a micro-hotplate for gas sensor applications using a two-step method involving block copolymer self-assembly and chemical vapor deposition. The gas sensors demonstrated exceptional performance in detecting H 2 S over a range of 50 ppb to 50 ppm. At an operating temperature of 200 °C, the gas sensor exhibited a remarkable response value (R=127.31) for 5 ppm H 2 S and an outstanding selectivity coefficient of 117.4. Additionally, the sensor maintained 95 % of its original response value over a month. These superior performance metrics are attributed to the n-n heterostructure between ZnO and ZnWO 4 , along with the extensive specific surface area and the presence of oxygen vacancies in the flower-like morphology. This novel approach not only enhances H 2 S detection performance but also significantly contributes to the development of gas sensors crucial for environmental monitoring and human health protection.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jie Zhang,Xu Liu,Yu Sun,Zhaoyan Ge,Xinlu Tian,Jian Shen,Jiang Yuan
Diabetic wound healing is often hampered by persistent oxidative stress, poor angiogenesis, and bacterial infections. Herein, ZnS/keratin nanoclusters(ZnS@Ker) were first synthesized using the ion diffusion method based on chelation between keratin and metal ions, achieving the controlled release of hydrogen sulfide (H 2 S) and Zn 2+ ions. These nanoclusters were then co -electrospun with polyurethane (PU) to afford PU/ZnS@Ker mats. These mats demonstrated acidic responsive release of Zn 2+ and H 2 S under an infected wound microenvironment, fostering cell adhesion, migration, and angiogenesis while effectively combating bacterial infection and scavenging reactive oxygen species. Notably, in vivo wound healing studies in diabetic rats revealed that PU/ZnS@Ker mats promoted collagen deposition and tissue regeneration, thereby accelerating wound healing. Taken together, PU/ZnS@Ker biocomposite mats emerge as an up-and-coming solution for managing diabetic wound healing.
研究领域:
生物医学工程
·
材料科学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Chaozhu Huang,Dongliang Liu,Dongting Wang,Haichuan Guo,Tiju Thomas,J. Paul Attfield,Fengdong Qu,Shengping Ruan,Minghui Yang
Efficient, accurate and reliable detection and monitoring of H 2 S is of significance in a wide range of areas: industrial production, medical diagnosis, environmental monitoring, and health screening. However the rapid corrosion of commercial platinum-on-carbon (Pt/C) sensing electrodes in the presence of H 2 S presents a fundamental challenge for fuel cell gas sensors. Herein we report a solution to the issue through the design of a sensing electrode, which is based on Pt supported on mesoporous titanium chromium nitrides (Pt/Ti 0.5 Cr 0.5 N). Its desirable characteristics are due to its high electrochemical stability and strong metal-support interactions. The Pt/Ti 0.5 Cr 0.5 N-based sensors exhibit a much smaller attenuation (1.3%) in response to H 2 S than Pt/C-sensor (40%), after 2 months sensing test. Furthermore, the Pt/Ti 0.5 Cr 0.5 N-based sensors exhibit negligible cross response to other interfering gases compared with hydrogen sulfide . Results of density functional theory calculation also verify the excellent long-term stability and selectivity of the gas sensor. Our work hence points to a new sensing electrode system that offers a combination of high performance and stability for fuel-cell gas sensors.
研究领域:
材料科学
·
化学工程
·
环境监测
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Jian Wang,Hui Xie,Haoyang Li,Rong Wang,Bo Zhang,Tianrui Ren,Jianli Hua,Nan Chen
Hydrogen sulfide (H2S) is one of the typical reactive sulfur species, which exhibits an important role in regulating both physiological and pathological processes. Recent studies indicate that H2S also serves as a key signaling molecule in a broad range of regulatory processes in plants. However, in situ imaging and detection of the levels of H2S in plant tissues remains a challenge. In this work, a NIR fluorescent probe (HBTP-H2S) was synthesized to achieve H2S imaging in living plant tissues. HBTP-H2S exhibited high sensitivity toward H2S with a large Stokes shift (250 nm). HBTP-H2S could be applied to HeLa cells to detect the fluctuation of endogenous H2S levels in response to physiological stimulations. Importantly, HBTP-H2S was utilized for direct H2S imaging of rice roots and revealed the upregulation of H2S signaling in response to aluminum ions and flooding stresses. Our work thus provides a new tool to investigate H2S-involved signal interaction and protective resistance of crops under environmental stresses.
研究领域:
植物生理学
·
环境胁迫
·
生物成像
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Selvaraj Muthusamy,Kanagaraj Rajalakshmi,Qingxiang Xu,Yan Chen,Long Zhao,Weihua Zhu
Detection of H 2 S to analyze some diseases in living lives demands fast response, high selectivity and biocompatibility. Here we designed an azide containing coumarin attached with 8-aminoquinoline via amide backbone (ACAQ) fluorophore as the H 2 S sensing probe. Excellent response time of 6 min, high sensitivity with the limit of detection (LOD) of 14.6 nM and high selectivity with other possible interferences are revealed for ACAQ after characterized by spectroscopy, 1 H NMR titration and LC–MS measurements. The sensing strategy is explained by amide-iminol tautomerism and azide reduction. In addition, the successful visualization measurement suggests the practicability of the probe ACAQ for H 2 S detection in live samples.
研究领域:
生物化学
·
医学诊断
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Junlei Zhan,Beibei Wang,Liangliang Zhang,Bao-Chang Sun,Jiwen Fu,Guang-wen Chu,Haikui Zou
This work presented experimental and modeling studies on the simultaneous absorption of H2S and CO2 into the N-methyldiethanolamine (MDEA) and piperazine (PZ) solution in a rotating packed bed (RPB). The effect of different operating conditions, including MDEA concentration (CMDEA), PZ concentration (CPZ), liquid volumetric flow rate (L), temperature (T), and high gravity factor (β) on the absorption efficiencies of H2S and CO2 (ηH2S and ηCO2) were investigated. The results showed that ηH2S and ηCO2 were significantly affected by CMDEA, CPZ, L, and β. ηH2S and ηCO2 could reach 99.98 and 96.51%, respectively. Furthermore, an artificial neural network (ANN) model was established to predict ηH2S, ηCO2, and mass-transfer coefficient (KGa). Results showed that the predicted values were in good agreement with the experimental values (within deviations of ±10% for H2S and CO2). This work provides a potential technology of simultaneous absorption of H2S and CO2 for the biogas upgrade.
研究领域:
化学工程
·
环境工程
·
过程控制
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yiran Xiong,Langlang Wang,Ping Ning,Jianfei Luo,Xiang Li,Li Yuan,Yibing Xie,Yixing Ma,Xueqian Wang
The rational design of catalyst structures holds paramount significance for realizing efficient catalytic reactions. In this study, an Fe 3 O 4 @MnO 2 core–shell catalyst was successfully synthesized using a facile one-pot method and applied in the selective oxidation of H 2 S in blast furnace gas. The introduction of the MnO 2 shell suppressed the further growth and aggregation of Fe species, leading to outstanding catalytic stability. Simultaneously, abundant oxygen vacancies facilitated the adsorption and activation of oxygen, thereby enhancing H 2 S oxidation. Experimental results revealed that the Fe 3 O 4 @MnO 2 catalyst (Fe/Mn = 4:1) displayed 100 % H 2 S conversion and 95.7 % sulfur selectivity at 150 °C in a humid gas stream containing O 2 and CO. Remarkably, no discernible decline in catalytic activity was observed after 170 h of operation, indicating the promising industrial prospects of this catalyst. This study provides an effective strategy for designing efficient and stable desulfurization catalysts.
研究领域:
材料科学
·
环境工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2012
·
IF 2.103
Zhen Wang,Xinbo Ci,Hongjun Dai,Lu Yin,Huixiang Shi
A highly photoactive Ti-containing Cr-modified MCM-48 photocatalyst (Si/Ti = 3.4, Si/Cr = 50) was prepared by a facile one-step method at room temperature. A combination of various physicochemical techniques such as X-ray diffraction (XRD), N 2 physisorption, diffuse reflectance UV–vis spectra (DRS) and X-ray photoelectron spectra (XPS) were used to characterize the properties of the synthetic catalysts. The characterization and experimental results indicated that tetrahedral Ti oxide moieties as dominant Ti oxide were loaded into the mesoporous structure and there was a synergistic interaction between the Ti species anchored on the walls and the Cr ions presented in the MCM-48 framework, which was considered to be directly correlated to the photoactivity. The Ti-Cr-MCM-48 sample can remove H 2 S with the efficiency of 92% under visible light, being the Cr 6+ species primarily responsible for this photoactivity. A deactivation was observed as a consequence of sulfate accumulation on the surface of the catalyst and reduction of Cr 6+ .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）