RSC Advances
·
2020
·Vol. 10
·期 14
·8332-8339
·
IF 3.119
Pinhua Zhang,Hongyang Zhu,Kaifeng Xue,Li Chen,Changmin Shi,Dongchao Wang,Jianfu Li,Xiaoli Wang,Guangliang Cui
2D heterostructures are promising gas sensor materials due to their surface/interface effects and hybrid properties. In this research, Cu2O/Fe2O3 heterostructure ordered arrays were synthesized using an in situ electrodeposition method for H2S detection at low temperatures. These arrays possess a periodic long range ordered structure with horizontal multi-heterointerfaces, leading to superior gas sensitivity for synergistic effects at the heterointerfaces. The sensor based on the Cu2O/Fe2O3 heterostructure ordered arrays exhibits a dramatic improvement in H2S detection at low temperatures (even as low as −15 °C). The response is particularly significant at room and human body temperatures since the conductivity of the arrays can change by up to three orders of magnitude in a 10 ppm H2S atmosphere. These good performances are also attributed to the formation of metallic Cu2S conducting channels. Our results imply that the Cu2O/Fe2O3 heterostructure ordered arrays are promising candidates for high-performance H2S gas sensors that function at low temperatures as well as breath analysis systems for disease diagnosis.
研究领域:
材料科学
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传感器技术
·
气体检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Ting-ting Yu,Xian-Fa Zhang,Ying-Ming Xu,Xiao-Li Cheng,Shan Gao,Hui Zhao,Li-Hua Huo
CdO-decorated hierarchically mesoporous NiO nanofilm with wrinkle structure was grown in-situ on ceramic tubes via a simple hydrothermal reaction without any surfactant or template. The as-prepared nanofilm was characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectra (XPS) and Brunauer–Emmett–Teller (BET) analyzes. It exhibits a nanoparticulate film with uniformly self-assembled wrinkles. These wrinkles are thin porous nanosheets that are further constructed by subnanometer nanoparticles . Compared with the NiO porous nanowall arrays, the 2.01 mol% CdO-decorated NiO film exhibits not only higher response to part per billion (ppb) levels (0.5–100 ppb) H 2 S at low temperature (92 °C), but also higher selectivity to other reducing gases compared with pure NiO porous nanowall arrays. The lowest detection limit of the NiO film after CdO decoration decreases down to 0.5 ppb while that of pure NiO is 1 ppb. The mechanism of the enhanced H 2 S sensing for 2.01 mol% Cd-decorated NiO film is also discussed in detail.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yinghong Luo,Caiyue Zhao,Wanglai Cen,Yanshi Zhang,Guannan Huo,Xiaoya Wang,Hanyue Ma,Yipeng Wang,Daiqi Ye,Junliang Wu
Metal oxide-loaded catalysts are extensively used for room temperature catalytic oxidation of H 2 S due to their strong affinity for H 2 S, but tend to exhibit poor activity due to uneven dispersion. Herein, a series of nitrogen and MgO co-modified activated carbon was synthesized using the co-impregnation method. The desulfurization efficiency of the optimal material exceeded the individual contributions of nitrogen doping and MgO loading by nearly 25 %, achieving a remarkable 742.67 mg/g. This enhancement was partly attributed to the synergistic interaction between electron-rich pyridine N and MgO, promoting oxygen vacancies formation, which favored O 2 activation. Moreover, the substitutional nitrogen defects in MgO induced the formation of adjacent magnesium vacancies, increasing the number of strong basic sites favorable for H 2 S dissociation. The modification strategy adopted in this study is also applicable to commercial activated carbon, providing a feasible approach for developing cost-effective low-temperature technology.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Hao Dong,Bo Wang,Xiandong Hao,Jinyu Wang,Zhiyong Xu,Wenbo Zhao
Seeking top-performing absorbents with excellent structural stability and renewability to realize efficient removal of H 2 S from natural gas is of great importance. Here, the H 2 S absorption thermodynamic and kinetic properties by a non-aqueous liquid binary blend of monoethanolamine (MEA) and ethylene glycol (EG) was systematically studied. The addition of solvent EG not only improves the thermal stability but also reduces the viscosity of the system especially after H 2 S absorption. The absorption mechanism was revealed by the combination of experimental characterization and Density Functional Theory (DFT) calculations, which show that the absorption process is a proton transfer reaction. In addition, a quasi-primary kinetic model was used to describe the absorption kinetic behavior, with rate constants increasing with temperature and pressure. Reaction equilibrium thermodynamic model (RETM) fitting thermodynamic results showed that the enthalpy (ΔH) and entropy (ΔS) of the interaction of the absorbent with H 2 S was −40.72 kJ/mol and −114.71 J/mol/K, respectively. Most importantly, the optimum absorption temperature was calculated to be 287.80 K and the optimum desorption temperature was 386.62 K. Moreover, the desulphurization rate was verified to increase with decreasing temperature and increasing H 2 S partial pressure. Five cycles of absorption-desorption experiments were conducted at 313.15 K for absorption and 373.15 K for desorption in order to verify the good reuse properties of the absorbent. Considering the excellent thermal stability, low viscosity after H 2 S absorption, acceptable absorption capacity as well as good reversibility, it is believed that the MEA/EG blend has a significant potential in the field of desulfurization.
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
POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2025
·
IF 6.8
Ying-Chun Song,Yu-Qi Zhao,Chi-Ming Tang,Pedro Garcia-Caparros,Si-Yu Yang,Jia-Qi Yu,Xiu-Ting Hu,Kang-Di Hu,Zhuo Han,Hua Zhang,Gai-Fang Yao
Hydrogen sulfide (H 2 S) is a gaseous signaling molecule that extends the postharvest storage period of fruit. Biaxially oriented polyethylene (BOPE) films are widely used in fruit packaging due to their excellent properties. By analyzing the phenotypic characteristics of strawberry fruits by comparing with the control, PE and BOPE or in combination with H 2 S at 4 ℃, it was shown that the H 2 S+BOPE treatment reduced decay and water loss, and maintained the best lustre and firmness than other groups. A total of 7,258 co-differentially expressed genes (DEGs) were identified by comparing H 2 S, H 2 S+PE and H 2 S+BOPE with Control by transcriptome analysis. GO, WGCNA and KEGG analyses showed that DEGs were mainly enriched in starch and sucrose metabolism, pigment metabolism and antioxidant activity from the MEyellow and MEblack modules. Moreover, these candidate genes were screened, and the expression level of CHS , PAL and DFR were significantly decreased in H 2 S+BOPE group than other groups by RT-qPCR. Physiological assessments indicated that H 2 S+BOPE treatment significantly delayed chlorophyll degradation, anthocyanin accumulation and TA content, increased reducing sugar content, carotenoid and POD activity, and maintained low MDA content in strawberries. PCA and heatmap showed that POD and pigments were main factors and the correlation analysis proved that POD activity exhibited a positive correlation with the expression of DFR (0.57) and bHLH3 (0.56), carotenoid content (0.54), and it showed a negative correlation with chlorophyll contents (-0.37). These results indicated that BOPE could effectively improve the appearance and antioxidant activity of strawberry fruits, thereby prolonging their postharvest storage period.
研究领域:
植物学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2022
·Vol. 17
·期 3
·1-12
·
IF 6.048
Gao Yuchen,Jiang Jianguo,Meng Yuan,Ju Tongyao,Han Siyu
Biogas is a renewable biomass energy source mainly composed of CH 4 and CO 2 . Dry reforming is a promising technology for the high-value utilization of biogas. Some impurity gases in biogas can not be completely removed after pretreatment, which may affect the performance of dry reforming. In this study, the influence of typical impurities H 2 S and NH 3 on dry reforming was studied using Ni/MgO catalyst. The results showed that low concentration of H 2 S in biogas could cause serious deactivation of catalyst. Characterization results including EDS, XPS and TOF-SIMS confirmed the adsorption of sulfur on the catalyst surface, which was the cause of catalyst poisoning. We used air calcination method to regenerate the sulfur-poisoned catalysts and found that the regeneration temperature higher than 500 °C could help catalyst recover the original activity. NH 3 in the concentration range of 50–10000 ppm showed a slight inhibitory effect on biogas dry reforming. The decline rate of biogas conversion efficiency increased with the increase of NH 3 concentration. This was related to the reduction of oxygen activity on catalyst surface caused by NH 3 . The synergetic effect of H 2 S and NH 3 in biogas was investigated. The results showed that biogas conversion decreased faster under the coexistence of H 2 S and NH 3 than under the effect of H 2 S alone, so as the surface oxygen activity of catalyst. Air calcination regeneration could also recover the activity of the deactivated catalyst under the synergetic effect of H 2 S and NH 3 .
研究领域:
能源化学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Yi Li,Shan Yu,Dmitry E. Doronkin,Shiqian Wei,Meng Dan,Fan Wu,Liqun Ye,Jan-Dierk Grunwaldt,Ying Zhou
As an important byproduct during natural gas exploitation, green utilization of hydrogen sulfide (H 2 S) by photocatalysis has offered us the possibility for production of clean hydrogen (H 2 ) from H 2 S with low energy consumption. In this work, we have successfully introduced well-dispersed palladium sulfide (PdS) which is preferably loaded on In 2 S 3 of MnS/In 2 S 3 composite for improved photocatalytic hydrogen evolution from H 2 S aqueous solution. In contrast to binary MnS/In 2 S 3 , ternary MnS/In 2 S 3 /PdS has exhibited a remarkable and stable hydrogen production rate of 22.7 mmol g −1 h −1 with an apparent quantum yield of 34% at around 395 nm. A comprehensive structure characterization of the ternary composite including scanning transmission electron microscopy (STEM) and X-ray absorption spectroscopy (XAS) in combination with theoretical calculations confirm the good dispersion of PdS in the composite. Moreover, we discovered that PdS preferably interact with In 2 S 3 rather than MnS in the composite through Pd-S-In bond on the interface of the two. Photoluminescence (PL) spectra, surface photovoltage (SPV) spectra together with transient photocurrent and electrochemical impedance spectra (EIS) demonstrate the advantage of PdS for promoting the charge separation. This work sheds light on the positive effect on the enhanced activity of the corresponding system resulting from the preferable anchoring of highly dispersed PdS on In 2 S 3 in the composite by chemical Pd-S-In bond. Not only the high dispersion but also the preferable anchoring of the co-catalyst in the composite could hence inspire people for more rational designs of ternary composite in future.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2021
·
IF 3.407
Pinhua Zhang,Wenhao Di,Kaifeng Xue,Guangliang Cui
Cu 2 O/ZnO heterostructure ordered nanoarrays were prepared with an in situ electrodeposition method for H 2 S detection in biological samples at room temperature. Based on this new material, a novel sensor was proposed, which exhibited good performances for sensitivity and selectivity for bio-H 2 S detection due to the surface/interface effects and long-range ordered structure. It was confirmed by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) that these good performances were mainly attributed to the conversion of Cu 2 O to metallic Cu x S on the surface of the ordered structure. In addition, the sensor had good portability due to its small size. Our results suggest that the Cu 2 O/ZnO heterostructure ordered nanoarrays are promising candidates for high-performance H 2 S sensors applied in disease diagnosis and environmental assessment.
研究领域:
材料科学
·
生物学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhaorui Zhang,Jing Yang,Chonghui Zhu,Mengmeng Xu,Xiaohui Yan,Jinkui Chu,Xinjiang Zhu,Minghui Yang
Electrode materials are pivotal in fuel cell-based gas sensors, yet conventional Pt-based catalysts often suffer from limitations in electronic structure and stability, restricting the practical application of H 2 S detection. Here, we introduce a Pt catalyst supported by a titanium-tungsten nitride (TiN-WN) composite for an electrochemical H 2 S sensor. Leveraging the multilevel electron transfer of the Pt/TiN-WN composite, this sensor achieves electron accumulation on the Pt surface, yielding enhanced conductivity and abundant active sites for high H 2 S sensitivity. It achieves a response current of 12.2 µA, 1.7 times that of Pt/C (7.1 µA), and demonstrates excellent linearity (R 2 = 0.999), stability over repeated tests, and robust anti-interference capability. These findings mark a significant advancement in H 2 S sensing, offering a reliable solution for real-time monitoring and addressing key limitations of current systems.
研究领域:
材料科学
·
电化学传感器
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Xiao-Lan Zhao,Jia-Li Liu,Fa-Ting Xie,Tong Yang,Rong Hu,Yun-Hui Yang
In this paper, a simple, rapid, and low-cost colorimetric method was designed based on Co/Fe-MOFs-iodide composite for the quantitative detection of H 2 S. It is know that iodide can improve the catalytic activity of bimetallic porous material Co/Fe-MOFs via adsorption into the framework of MOFs. Herein, we demonstrate a novel strategy to enhance the peroxidase-like activity of MOFs. Compared to horseradish peroxidase (HRP), the kinetic measurement results show that Co/Fe-MOFs-iodide exhibits excellent affinity to substrates, promoting electron transfer. Due to the synergetic effect of Co/Fe-MOFs and iodide, and rapid electron transfer process, Co/Fe-MOFs-iodide demonstrates improved peroxidase-like activity. As a proof-of-concept application, a novel, highly sensitive H 2 S colorimetric method is established with a detection limit (LOD) of 0.33 nM. In the absence of iodide, LOD is approx. 200-fold higher than that of the amplified colorimetric assay. The proposed method can also accurately detect traces of H 2 S in serum samples.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Lu Tang,Huajing Wang,Zhenming Du,Chaoqi Zhu,Chaofan Ma,Dawen Zeng
Due to the large band gap, most metal oxide semiconductor (MOS)-based gas sensors operate at high temperatures, which greatly limits their performance for gas sensing. In this work, we reported the successful synthesis of nanocomposites consisting of porous MXene nanosheets formed by the sublimation of sulfur and SnO2 nanoparticles (S-PM/SnO2). To prevent the restacking of MXene flakes under van der Waals force, a sacrificial S-template method was employed to transform MXene into a three-dimensional (3D) structure. The presence of MXene lowers the operating temperature. With a high response (∼30.6 – 10 ppm of H2S), rapid response speed (∼16.6 s – 50 ppm of H2S), high sensitivity (∼3.12 ppm–1), low detection limits (distinct response to 100 ppb H2S), and good selectivity at 100 °C, the sensor based on the optimal sample of S-PM/SnO2-6 demonstrates excellent H2S sensing performance. The improvement in H2S gas-sensing capacity can be attributed to the development of heterojunctions at the interface of porous MXene nanosheets (S-PM) and SnO2 nanoparticles (NPs). This leads to an enlarged surface depletion region and an elevated potential barrier, which significantly amplifies the range of resistance variation. These results suggest that S-PM/SnO2 nanocomposite has promising prospects in the realm of low-temperature and highly sensitive H2S detection.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Long Ma,Shuzhen Chen,Changlei Qin,Susu Chen,Weiyang Yuan,Xu Zhou,Jingyu Ran
Li 4 SiO 4 is a well-acknowledged CO 2 sorbent in the sorption-enhanced reforming system for low-cost H 2 production with a high purity. However, the inevitable presence of H 2 S in the biomass-derived syngas etc. could possibly affect the in-situ CO 2 adsorption significantly, which is important but has never been reported. In this work, the adsorption of CO 2 using Li 4 SiO 4 was investigated under varying H 2 S concentrations and reaction temperatures, and a series of characterization techniques were utilized to understand the effect of H 2 S and its action mechanism. The results show that the presence of H 2 S causes a rapid loss-in-capacity of Li 4 SiO 4 in capturing CO 2 during the cyclic reactions, and a higher concentration greatly exacerbates the problem. Moreover, the negative impact of H 2 S is found to have a strong relationship to the reaction temperature. It is proposed that at 325~475 °C, Li 4 SiO 4 and H 2 S react to form bits of Li 2 S and some kinds of sulfates, and at 625~775 °C, a large amount of dense KLiSO 4 is generated covering the surface of the sorbent. In contrast, at a high temperature above 925 °C, sintering of Li 4 SiO 4 plays a critical role, leading to a significant change on its microstructure.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
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