Journal of Materials Chemistry A
·
2015
·Vol. 4
·期 3
·1096-1104
·
IF 7.443
Hao Wu,Zhimin Chen,Jialin Zhang,Feng Wu,Chunying He,Bin Wang,Yiqun Wu,Zhiyu Ren
Cost-efficient, highly sensitive and stable sensing materials play a key role in developing H2S sensors. Herein, tetra-β-carboxyphenyloxyphthalocyanine cobalt(II) (cPcCo) has been successfully bonded on the surface of acidified multiwalled carbon nanotubes (aCNTs) by a facile two-step condensation reaction in the presence of N,N′-dicyclohexylcarbodiimide (DCC), using hydroquinone (HQ), p-aminophenol (PAP), and p-phenylenediamine (PPD) as linking molecules, respectively. The obtained cPcCo–B–aCNT (B= HQ, PAP, and PPD) hybrids display good dispersibility in ethanol, which is beneficial to construct uniform sensing devices. The cPcCo–B–aCNT sensors, with a loose network-like structure, present abundant exposed sensing sites, oriented transmission of charges, and unimpeded pathways for H2S diffusion, which endow the cPcCo–B–aCNT hybrids with excellent sensing performance, in terms of sensitivity, reliability, reproducibility, and detection limit. The detection limit of the sensors composed of cPcCo–B–aCNT hybrids towards H2S reaches the ppb-level at room temperature, which is about the same as the odor threshold level for humans. For the cPcCo–HQ–aCNT sensor, the response to H2S varies linearly with respect to its concentration from 20 to 160 ppb and from 320 to 2560 ppb, with the highest gas response of 2.5% to 80 ppb H2S and a low detection limit of 5 ppb. Furthermore, the linking molecules play a critical role in the sensitivity of H2S, as evidenced from the current–voltage characteristics. The systematic study developed here provides a valid way to fabricate other high-efficient H2S sensors.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xiaoqun Dong,Yingying Su,Ting Lu,Lichun Zhang,Liqian Wu,Yi Lv
In the present work, porous Co 3 O 4 was easily prepared via thermal decomposition of metal-organic frameworks (MOFs). TG, FT-IR, XRD, SEM, TEM and N 2 adsorption-desorption were employed for characterizing the synthesized products. Based on cataluminescence (CTL) transduction principle, three MOFs including dodecahedra ZIF-67, nanosheets packed Co-MOF-71, nanoplate Co-BTC, and their corresponding derivatives Co 3 O 4 were used as sensing materials for H 2 S detection, respectively. The dodecahedra ZIF-67-derived dodecahedra Co 3 O 4 with high specific surface and exposed {110} lattice planes presented superior strong CTL property, and had a good linear relation in the concentration range of 3.3–27.5 μg L −1 with the detection limit of 1 μg L −1 (S/N = 3), while the original MOFs displayed no CTL signal. Eighteen common volatile organic compounds (VOCs) were investigated as possible interference, and the results indicated that MOFs-derived porous dodecahedra Co 3 O 4 would be one of excellent sensing material candidates for monitoring H 2 S with a promising application in routine analysis.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
PROGRESS IN REACTION KINETICS AND MECHANISM
·
2017
·
IF 0.682
Jiao Jing Zhang,Wen Yi Wang,Guo Jian Wang,Cheng Kai,Hua Song,Lu Wang
A model natural gas consisting of hydrogen sulfide, nitrogen and oxygen mixture was used to simulate materials to test the performance of an amine-modified MCM-41 adsorbent prepared by the impregnation method. The adsorbent was characterised by X-ray diffraction analysis, Brunauer–Emmett–Teller analysis, Fourier-transform infrared spectroscopy, transmission electron microscopy and scanning electron microscopy. The results showed that more molecules are able to penetrate the pores following modification, resulting in rapid structural collapse, thus lowering the diffraction intensity. Although the capacity of amine-modified MCM-41 decreased the physical adsorption, chemisorption increased significantly. (3-Aminopropyl)trimethoxysilane/MCM-41 was found to exhibit a good performance for H2S desulfurisation. At 45 °C the breakthrough time was 186 min, the saturated sulfur capacity was 134.38 mg g−1 and the degree of desulfurisation was 54.19%. The adsorption isotherm and kinetics were investigated and the relevant parameters were obtained. The results showed that the adsorption isotherm could be well fitted by the Langmuir model and the maximum adsorption capacities increased with increase of temperature. The adsorption kinetics could be represented by the Bangham model, which suggested that chemical reaction seemed significant in the rate-controlling adsorption step. The adsorption process was spontaneous and exothermic.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Shuai Liu,Dicka Ar Rahim,Yan Zhang,Dan Wang,Ekkachai Kanchanatip,Yi He,Mi Yan
To advance the utilization of high-concentration CO2 produced in biogas upgrading, it is essential to remove associated hydrogen sulfide (H2S). This study presents a series of bimetallic Fe–Cu oxides supported on multi-walled carbon nanotubes (MWCNTs), which were synthesized to efficiently remove H2S from CO2-rich gas at low temperatures. The synergy of the bimetallic elements not only forms a multifaceted active phase but also causes new defects on the MWCNTs, creating more H2S/CO2 separation sites. The adsorption experiments demonstrate that the deep H2S removal performance of the adsorbent is unaffected by the CO2 concentration, achieving a maximum adsorption capacity of 30.11 mg g−1, which exceeds that of commercial desulfurizers and previously reported adsorbents. Additionally, density functional theory calculations were employed to elucidate that the introduction of Cu species increases the gap in the average adsorption energies between H2S and CO2. The adsorbent also exhibited stability after 4-cycle regeneration at room temperature, maintaining 62.6% of its initial H2S capacity. This work underscores the potential of Fe–Cu oxide/MWCNTs adsorbents as a viable, regenerable solution for H2S removal in CO2 purification, offering implications for carbon-negative construction.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Zhonghui Zhang,Changlei Qin,Zhiliang Ou,Jingyu Ran
H 2 S is a kind of common impurity produced during the gasification of biomass, and it will poison the catalysts used in biomass tar steam reforming , leading to a rapid degradation on the catalytic performance. The purpose of this work is to investigate the characteristics of biomass tar steam reforming using Ni/perovskite catalysts with the presence of H 2 S. Results show that H 2 S could significantly reduce catalytic activity due to the adsorption of sulfur on Ni surface , and Ni/perovskite catalysts are less susceptible to this poisoning in comparison to the Ni-catalyst loaded on γ-Al 2 O 3 . To understand the mechanism, fresh and spent catalysts were characterized using various techniques of XRD , SEM-EDS, XPS and TPO . It is proved that the lattice oxygen in perovskite could transform into surface species, inhibit the adsorption of sulfur and thus benefit to the reactivity of catalysts during biomass tar steam reforming.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 3
·037504
·
IF 4.386
Tiantian Qiu,Na Luo,Mengmeng Guo,Haijie Cai,Zhixuan Cheng,Jiaqiang Xu
Constructing porous structure has proved to be an effective strategy to improve the gas sensing properties of metal oxide semiconducting materials. In this work, high-performance hydrogen sulfide (H2S) gas sensing material with porous structure were synthesized by growing nickel oxide (NiO) on vanadium trioxide (V2O3) seeds. Morphology and structure characterizations reveal that the novel three-dimensional (3D) nanoflowers are formed by self-assembling two-dimensional (2D) porous nanosheets with high surface area and abundant active sites. Compared with pristine NiO, the sensing performance of V2O3-NiO (VN8, VN7, VN6) with different ratios of V3+: Ni2+ is enhanced due to their porous structure. Among them, VN7 sensor shows excellent sensing properties at 200 °C. The response to 500 ppb H2S can reach 65, which increases as high as 2.2 times compared with the pristine NiO sensor. The response time to 500 ppb H2S is further decreased from 13 s of the pristine NiO sensors to 8 s of VN7 sensor. The VN7 sensor also shows a wide linear range from 20 ppb to 500 ppb, high selectivity, good repeatability, long-term stability, moisture resistance and low detection limit (20 ppb), indicating its potential candidate for ppb-level H2S detection in complex environment of industrial mine.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 27
·70884-70896
·
IF 5.8
Li Ke,Zhu Yuqiu,Wang Zixuan,Chen Dingkai,Wu Wenwei,Luo Yongming,He Dedong
High concentration of H 2 S in acidic natural gas will lead to poisoning of catalysts for hydrogen production by methane steam reforming, thus limiting the further use of natural gas. Reforming CH 4 by H 2 S can be considered as an alternative route to hydrogen production from methane. This process not only achieves the removal of H 2 S but also obtains chemical raw material CS 2 and clean energy H 2 . By impregnating the Mo source on SiO 2 treated with hydrogen peroxide and then using the catalyst in the CH 4 /H 2 S reforming reaction, we surprisingly found that the conversion rate of CH 4 and H 2 S increased from 28 and 32% to 34% and 43%, respectively, after hydrogen peroxide treatment. The H 2 production rate and the yield of CS 2 increased from 20 mmolH 2 /(g Mo *min) and 52% to 30 mmolH 2 /(g Mo *min) and 65%, respectively. Combining with characterization methods such as X-ray diffraction (XRD), hydrogen temperature programmed reduction (H 2 -TPR), 1 H-based solid-state nuclear magnetic resonance ( 1 H MAS NMR), X-ray photoelectron spectroscopy (XPS), Raman spectra (RS), and transmission electron microscopy (TEM), we found that the hydroxyl concentration of the support increased after hydrogen peroxide treatment, which led to the strengthening of the force between the metal and the support, which was easy to form low-level and small-size MoS 2 , exposing more active sites, and further improving the catalytic activity. This method provides a new idea for hydrogen production by CH 4 /H 2 S reforming and the development of high-performance MoS 2 -based catalysts.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Processes
·
2024
·Vol. 12
·期 10
·2111
·
IF 2.8
Tong Ding,Nanheng Cen,Rui Fan,Long Li,Yonghong Du,Chun Tang,Heng Guo,Yiping Li,Zongshe Liu
The electrochemical removal of abundant and toxic H2S from highly sour reservoirs has emerged as a promising method for hydrogen production and desulfurization. Nevertheless, the ineffectiveness and instability of current electrocatalysts have impeded further utilization of H2S. In this communication, we introduce a robust array of Fe2NiSe4nanowires synthesized in situ on a FeNi3foam (Fe2NiSe4/FeNi3) via hydrothermal treatment. This array acts as an active electrocatalyst for ambient H2S splitting. It offers numerous exposed active sites and a rapid electron transport channel, significantly enhancing charge transport rates. As an electrode material, Fe2NiSe4/FeNi3displays remarkable electrocatalytic efficiency for both sulfide oxidation and hydrogen evolution reactions. This bifunctional electrode achieves efficient electrochemical H2S splitting at a low potential of 440 mV to reach a current density of 100 mA∙cm−2, with a faradaic efficiency for hydrogen production of approximately 98%. These findings highlight its significant potential for desulfurization and energy-efficient hydrogen generation.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shuwen Peng,Yuran Li,Bin Wang,Yanbin Cui,Jinglei Tian,Hongqiang Liu,Tingyu Zhu
Removal of sulfur species from blast furnace gas is urgently needed due to the strict emission limits imposed on iron-steel industrial flue gas. Improving the sulfur capacity of H 2 S is a crucial challenge to reduce the operation cost. NiFe layered double hydroxide (LDH) adsorbents were synthesized using the hydrothermal method to strengthen the adsorption of H 2 S, achieving a high sulfur capacity of 133.6 mg/g at 50 °C. Characterization studies have revealed that the reaction pathway of H 2 S on the NiFe LDH surface involves adsorption, dissociation and oxidation. It has been clarified that the high sulfur capacity can be attributed to the abundant H 2 S dissociation sites and the excellent O 2 activation sites. The dissociation sites of H 2 S encompass metal sites, -OH and CO 3 2- . The interaction between O 2 and the bridge site of asymmetric metal atoms significantly enhances the dissociation of O 2 . Strengthening the dissociation of H 2 S and O 2 improves the sulfur capacity. The deactivation of adsorbents comes from the continuous consumption of oxygen species mainly composed of -OH and the deposition of sulfur species in the smaller mesopores ranging from 2 to 10 nm. This work provides useful insights into designing highly efficient iron-based adsorbents for the desulfurization of blast furnace gas.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Bin Meng,Erping Cao,Liwei Jia,Yuhua Zheng,Yanbin Cui
A variety of Cu-Fe oxide supported on Na 2 CO 3 -modified activated carbon (CuFeNaAC-X) catalysts were prepared via the impregnation and calcination methods and their desulfurization performance was evaluated at low-temperature. By optimizing the loading content of Cu-Fe, the sulfur capacity of the CuFeNaAC-5 reached a maximum of 430.09 mg/g, surpassing most activated carbon (AC) catalysts. EPR testing revealed that the loading of Cu-Fe oxide can activate oxygen to form superoxide radicals ( O 2 - ·), thereby promoting the catalytic oxidation of H 2 S. XPS testing revealed that upon loading of Cu-Fe oxide, the formation of FeOOH can facilitate the catalytic oxidation of H 2 S to sulfur (S) through a chain reaction. Combining EPR and XPS analyses, Na 2 CO 3 modification modulates the content of O 2 - ·, directing the formation of S and then significantly improving the catalyst’s desulfurization efficiency. Furthermore, CO 2 -TPD testing revealed that Na 2 CO 3 modification promotes the ionization of H 2 S to HS - , thereby enhancing the catalyst’s desulfurization performance. Based on the distribution of sulfur species in used catalysts, and the results of characterizations, a possible desulfurization mechanism of CuFeNaAC-X has been proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 9
·095022
·
IF 1.068
Haojie Duan,Lei Yan,Yue He,Haiying Li,Li Liu,Yali Cheng,Liting Du
In2O3 nanofibers (NFs) and toruloid nanotubes (TNTs) were fabricated by conventional electrospinning process and their sensing properties toward H2S gas were researched. Thermogravimetric analysis, x-ray diffractometry, energy dispersive spectroscopy and scanning electron microscopy were carefully used to investigate the structures, chemical compositions and morphologies of these samples. The novel structure (TNTs) first used nonpolar mineral oil as the control agent of morphology, and the principle of forming toruloid nanotubes was studied. Phase separation plays a critical role in the process of forming toruloid nanotubes structure automatically. The new application of phase separation provided a simple and effective approach for controlling structure. The research indicated that thin-walled toruloid nanotubes showed higher responses toward H2S compared to nanofibers or thick-walled toruloid nanotubes. Additionally, their excellent selectivity can be attributed to the special gas-sensing mechanism of In2O3 for H2S.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Chunyuan Tian,Feiyan Tang,Mingxia Wang,Jie Zhou,Xidian Yue,Feng Luan,Xuming Zhuang
In this work, an eco-friendly and rapid dual-mode detection method for H 2 S based on europium oxide doped with carbon quantum dots nanocomposites (Eu 2 O 3 @CDs NPs) is proposed. An efficient electrochemiluminescence (ECL) sensor and dual emission ratio type fluorescence (FL) sensor was constructed by Eu 2 O 3 @CDs NPs, which exhibit excellent ECL and FL properties. It successfully realized the precise quantitative detection of H 2 S due to the influence of the sulfion (S 2- ) to resonance energy transfer mechanism in Eu 2 O 3 @CDs NPs and the extremely short response time greatly improves the analysis efficiency. Ultimately, a good linear relationship in the concentration range of 1 pM to 10 mM and 50 nM to 0.5 mM of H 2 S was acquired, respectively, and the detection limit was as low as 0.0537 pM and 4.88 nM (S/N = 3). In addition, both sensors show excellent selectivity, and stability, and provide a novel idea for establishing H 2 S sensors.
研究领域:
环境科学
·
分析化学
·
生物传感
✓ 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）