TALANTA
·
2024
·
IF 5.6
Deshou Xiong,Manyu Luo,Qing He,Xingpeng Huang,Sijin Cai,Shuang Li,Zhenhong Jia,Zhixian Gao
The detection of ammonia (NH 3 )gas holds significant importance in both daily life and industrial production. In this study, the Nb 2 CT x /MoSe 2 sensor was synthesized using a one-step hydrothermal method and applied for NH 3 detection. The morphology and elemental composition of the composites were analyzed through a series of characterization techniques including XRD, TEM, SEM, and XPS, confirming the successful synthesis of Nb 2 CT x /MoSe 2 composite with the optimal mass ratio. The sensing performance of the sensor for NH 3 (0.1–100 ppm) was tested at room temperature (∼25 °C). The results showed that, compared to pure Nb 2 CT x , the sensor based on Nb 2 CT x /MoSe 2 composite exhibited more stable baseline resistance, a 3.5-fold increase in response to 50 ppm NH 3 , and a reduction in response/recovery time by 56.4 s/32.1 s. Additionally, the sensor's response to NH 3 (1 ppm, 50 ppm, 100 ppm) varied by less than 10 % over 90 days, demonstrating excellent stability. The sensing mechanism of NH 3 by Nb 2 CT x /MoSe 2 composite is attributed to the formation of a p-n heterojunction and surface charge transfer at the interface between p-type Nb 2 CT x and n-type MoSe 2 . Finally, the superior selectivity mechanism of the composite for NH 3 was investigated using first-principles calculations. This work opens a new avenue for exploring the application potential of Nb 2 CT x MXene-based nanocomposites in NH 3 detection.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Duan Yunlong,Guo Liying,Zhang Xiao,Zhao Xudong,Zhang Linnan
With the increasing energy problems and environmental pollution, lithium-ion batteries have gradually become the preferred power source for new energy vehicles due to their high energy density. With the global popularity of lithium-ion batteries, the heavy metal pollution and resource waste caused by spent batteries are becoming more and more obvious, and as a result, research on recycling treatment and resource utilization technology is critical. In this study, the leaching treatment of waste ternary cathode materials was carried out by using a H 2 SO 4 -H 2 O 2 leaching system, and the recycled metal elements were used as raw materials for subsequent synthesis. The NCM622 precursor (Ni 0.6 Co 0.2 Mn 0.2 (OH) 2 ) and Li 2 CO 3 were prepared by the co-precipitation method, and the high-performance NCM622-type (LiNi 0.6 Co 0.2 Mn 0.2 O 2 ) cathode materials were regenerated by argon-oxygen mixed gas calcination at 850°C after pre-oxidation treatment. The materials exhibited excellent electrochemical performance, with capacity retention as high as 91% after 100 cycles at 0.2C current density, thus demonstrating the ability of this process to achieve high-performance regeneration of NCM622-type cathode materials.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Ying-Zhen Li,Heng Zhuang,Ji-Ying Fan,Wei-Yi Xia,Jia-Lei Wan,Chi Che,Yan-Jun Du
Gases from landfills and industrial contaminated sites adversely affect human health and the climate. Geosynthetic Clay Liners (GCLs), consisting of two geotextiles and bentonite, are widely used as a gas barrier material. However, studies on the gas permeability of biopolymer-amended bentonite as the GCLs core are limited, especially cation exchange occurs during hydration of GCL with natural soil pore water. Free swell index, gas permeability, hydraulic conductivity tests and microscopic tests were conducted to evaluate the gas /hydraulic performance of GCL. This study evaluated the impact of cation exchange on the liquid limit and free swell index of xanthan gum (XG)-amended sodium-activated calcium bentonite and its consequent impact on gas permeability of XG-amended GCL (XG-GCL). The gas permeability of XG-GCL with 1% XG dosage hydrated with salt solution preserved low value of 6.2 × 10 -15 m 2 at apparent degree of saturation of 80%, which was approximately one-eighth of the value measured in unamended GCL (4.7 × 10 -14 m 2 ). When hydrated and permeated with salt solution, the hydraulic conductivity decreased from 2.6× 10 -10 to 3.8 × 10 -11 m/s as XG dosage increased from 0 to 2%. The findings demonstrated that XG dosage no less than 1.0% could maintain low gas permeability and acceptable hydraulic conductivity of XG-GCL when exposed to salt solution. The enhanced gas/hydraulic performance were attributable to: (1) the XG hydrogels effectively filled the inter-aggregate pore within GCL core; and (2) the carboxyl groups on XG side chains interacted with Ca 2+ , forming ionic cross-linking, which effectively mitigated the adverse effects of Ca 2+ on the diffuse double layer of montmorillonite. This study provides new insights into the role of biopolymer amended-GCL performance exposed to natural soil pore water.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 25
·1-13
·
IF 2.8
Zhang Yuexing,Feng Wenlin,Ullah Arif
To address the need for high-sensitivity carbon monoxide (CO) gas sensing at room temperature, a CO gas sensor based on Au-modified tin oxide/zinc oxide (SnO₂/ZnO) nanocomposites is fabricated. SnO₂ nanoparticles, ZnO nanosheets, and Au nanoparticles (AuNPs) were synthesized using sacrificial template, hydrothermal, and chemical reduction methods, respectively. The resulting nanocomposite was then drop-casted onto interdigitated electrodes and dried to obtain the CO gas sensor. The performance of the sensor was evaluated using a custom airtight chamber and a semiconductor parameter analyzer. The n–n heterojunction between SnO₂ and ZnO significantly increased oxygen vacancy in the composite material, enhancing surface chemisorption of oxygen. Moreover, the catalytic sensitization effect of AuNPs facilitated electron migration, while their inherent spillover effect promoted the activation of gas molecule interactions. Consequently, the sensor exhibited a high response (22.11%) to 70 ppm CO at room temperature, along with excellent stability, selectivity, and anti-interference capabilities. This work offers a promising approach for developing highly sensitive room-temperature gas sensors.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 6
·1461-1470
·
IF 7.2
Ahmad Touqeer,Zhu Zhengxin,Sajid Muhammad,Wang Weiping,Ma Yirui,Ali Mohsin,Khan Nawab Ali,Liu Shuang,Zhang Zuodong,Chen Wei
Along with the surging demand for energy storage devices, the cost and availability of the materials remain dominant factors in slowing down their industrial application. The repurposing of waste asphalt into high-performance electrode materials is of significant interest, as it holds the potential to circumvent energy and environmental issues. Here, we report the controllable synthesis of asphalt-derived mesoporous carbon as an active material for electrocatalytic hydrogen gas capacitor (EHGC). The hierarchically porous carbon (HPC) with a high surface area of 1943.4 m 2 ·g −1 can operate in pH universal aqueous electrolytes in EHGC. It displays a specific energy and power density of 57 Wh·kg −1 and 554 W·kg −1 in neutral electrolyte as well as 52 Wh·kg −1 and 657 W·kg −1 in acidic electrolyte. Additionally, the charge storage mechanism of HPC–EHGC is studied with the help of Raman spectroscopy and X-ray photoelectron spectroscopy. Furthermore, the assembled HPC–EHGC device displays a discharge capacitance of 170 F·g −1 with an excellent capacitance retention rate of 100% up to 20000 cycles at 10 A·g −1 in acidic electrolyte. This work introduces a novel approach to converting waste asphalt into high-performance carbon for EHGC, achieving superior performance over commercial materials. By simultaneously addressing environmental waste issues and advancing energy storage technology, this study makes a significant contribution to sustainable materials science and next-generation battery development.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Mingyang Gao,Wen Zhang,Jun Guo,Licun Fu
Gas sensors integrated with intelligent systems are of great importance for real-time environmental monitoring and personal exposure assessment. In particular, nitrogen dioxide (NO 2 ), a toxic byproduct of combustion and industrial processes, poses severe risks to human health even at trace levels, highlighting the urgent need for sensitive and portable monitoring technologies. Here, we present a tungsten trioxide (WO 3 )/carbon nanotubes (CNTs)-based flexible sensor coupled with an Integrated Intelligent Sensing System (IISS) capable of on-site NO 2 detection, signal processing, and wireless mobile display. The optimized WO 3 /CNTs sensor exhibits outstanding sensing performance, delivering a high response of 425.1 % toward 1 ppm NO 2 . Distinctively, by integrating the sensor into the IISS platform, real-time NO 2 concentrations can be acquired, processed, and displayed on a mobile device, enabling direct and user-friendly exposure monitoring. These results highlight the novelty of combining a high-performance WO 3 /CNTs sensor with a miniaturized IISS, offering a practical strategy for intelligent, wearable, and portable gas detection applications.
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高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2025
·
IF 1.4
Xia Zhong,Zihong Dong,Changsong Liu,Xin Pei,Hao Shi,Hua Dong
In sour gas reservoirs exploitation, liquid sulfur deposited in the formation could block natural gas passage channels, severely reducing gas field production. To address this problem, we successfully regulate the wettability of liquid sulfur on rock surfaces by modifying them with alkoxysilanes. It is found that enhancing the sulfophobicity of the rock surface significantly reduces the difficulty of gas-phase breakthrough of channel blockage caused by liquid sulfur deposition. During the simulated gas flooding process, the liquid sulfur recovery rate in neutral and sulfophobic rocks is increased by 48.3% and 124.4%, respectively, compared with untreated natural sulfophilic rocks, resulting in 29.3% and 50.0% increase in porosity of the rocks after flooding, respectively. These results indicate that the modified rock surface, especially sulfophobic rock surface, could effectively alleviate the blockage of gas production channels caused by liquid sulfur deposition. Mechanisms revealed by visualized experimental results show that in gas flooding in more sulfophobic cores, the swept area of gas phase is larger and the amount of residual sulfur in the swept area is less, so the sulfur recovery rate is higher than untreated sulfophilic rock, and the blockage caused by liquid sulfur in the cores could be effectively reduced.
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高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Lin Zhang,Yang Zheng,Guoliang Li,Jiajia Gao,Yali Tong,Tao Yue
With the rapid development of adsorbents for removal of elemental mercury (Hg 0 ) from coal combustion flue gas, the preparation of adsorbents with superior performance, lower cost and environmental friendliness remains an important challenge. An incipient wetness impregnation method followed by in-situ selenization was used to load copper selenide (CuSe) onto the surface of optimal magnetic biochar (OMBC). The results showed that CuSe significantly enhanced the Hg 0 removal performance of the OMBC, and CuSe loading ratio of 10 % (10CuSe/OMBC) had the best Hg 0 removal performance. 10CuSe/OMBC maintained its Hg 0 removal efficiency above 95 % for 150 min at 30∼150 °C, and it had a good resistance to SO 2 . The equilibrium adsorption capacity of 10CuSe/OMBC could reach up to 8.73 mg/g, which was close to the theoretical value 12.99 mg/g, and the adsorption rate was up to 20.33 µg/(g·min) Meanwhile, 10CuSe/OMBC had strong magnetism that is not permanently magnetized, which could be separated from desulfurization gypsum and recycled many times. Characterization results demonstrated that Se 2 2- , Cu 2+ and O β played essential roles in the oxidation of Hg 0 , and Se 2 2- and Se 2- can immobilize Hg 2+ to HgSe. 10CuSe/OMBC has important guiding significance for practical application because of its low cost, high performance and low mercury leaching characteristic to form HgSe.
研究领域:
环境科学
·
材料科学
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Lin Lyu,Quan Xie,Yinye Yang,Rongrong Wang,Weifu Cen,Shengyun Luo,Wensheng Yang,Yue Gao,Qingquan Xiao,Ping Zou,Yang Yang
Acetone is flammable and harmful to human health and environment. It is urgent and significant to develop high sensitivity and efficiency sensors for acetone gas detecting. Herein, a novel nanoscale hollow–shell structure of CeO 2 with high stability, sensitivity and selectivity for acetone gas detecting was designed. The as-developed nanoscale hollow–shell CeO 2 sensor presents 270% sensing response, and the corresponding response and recovery are 6 s and 11 s when detecting 100 ppm acetone gas at 260 ℃. Remarkably, this sensor exhibits excellent stability in continual detection of 100 ppm acetone gas in 60 days. Furthermore, the developed nanoscale hollow–shell CeO 2 sensor presents an outstanding selectivity to acetone gas among ethanol, methanol, xylene, ammonia, formaldehyde and ethylene glycol gases. DFT further reveals that there are 0.66 electrons of acetone molecule transferred to CeO 2 , which will decease CeO 2 band gap from 2.74 eV to 1.91 eV, and consequently the conductivity enhanced after absorbing acetone gas. This developed CeO 2 nanoscale hollow–shell sensor can be used as matrix sensor material for VOCs detection.
研究领域:
材料科学
·
环境科学
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ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Cuiming Lu,Shuqin Liu,Jianqiao Xu,Yajuan Ding,Gangfeng Ouyang
Microporous organic polymers (MOPs) have emerged as a new class of functional porous materials with unique characteristics and potential uses in diverse areas. However, the field of MOPs for gas chromatographic (GC) separations has not been well explored. Herein, a MOP namely KAPs-1 was dynamic coated onto a capillary column for the first time. The fabricated column exhibited a nonpolar nature and the column efficiency for n -dodecane was up to 7769 plates m −1 . The KAPs-1 coated column showed high GC separation performance for a series of volatile organic compounds (VOCs) including the challenging ethylbenzene and xylene isomers, which could not be resolved at baseline on the commercial 5% phenyl polysiloxane stationary phase. Moreover, the relative standard deviations for five replicate determinations of the studied analytes were 0.0–0.6%, 0.9–3.2%, 1.1–5.9%, 0.8–3.7% for retention time , peak area, peak height and peak width, respectively. To investigate the interaction between some analytes and the stationary phase, thermodynamic and kinetic parameters were also evaluated. The results of this study show it is very promising to utilize MOPs as stationary phases for capillary GC.
研究领域:
分析化学
·
材料科学
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yuyang Xiao,Xingfeng Lei,Shuyu Xue,Ruhe Lian,Guo Xiong,Xiangze Xin,Dechao Wang,Qiuyu Zhang
Gas barrier membranes with impressive moisture permeability are highly demanded in air or nature gas dehumidification. We report a novel approach using polyetheramine oligomers covalently grafted on the carbon nanotubes (CNTs) to engineer liquid-like CNT nanofluids (CNT NFs), which are incorporated into a polyimide matrix to enhance the gas barrier and moisture permeation properties. Benefiting from the featured liquid-like characteristic of CNT NFs, a strong interfacial compatibility between CNTs and the polyimide matrix is achieved, and thus, the resulting membranes exhibit high heat resistance and desirable mechanical strength as well as remarkable fracture toughness, beneficially to withstanding creep, impact, and stress fatigue in separation applications. Positron annihilation lifetime spectroscopy measurements indicate a significant decrease in fractional free volume within the resulting membranes, leading to greatly enhanced gas barrier properties while almost showing full retention of moisture permeability compared to that of the pristine membrane. For membranes with 10 wt % CNT NFs, the gas transmission rates, respectively, decrease 99.9% for CH4, 94.4% for CO2, 99.2% for N2, and 97.9% for O2 compared with that of the pristine membrane. Most importantly, with the increasing amount of CNT NFs, the hybrid membranes demonstrate a simultaneous increase of barrier performance and permselectivity for H2O/CH4, H2O/N2, H2O/CO2, and H2O/O2. All these results make these membranes potential candidates for high-pressure natural gas or hyperthermal air dehydration.
研究领域:
材料科学
·
化学工程
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高影响因子
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
·
2023
·
IF 1.8
Patigu Maimaiti,Patima Nizamidin,Nuerguli Kari,Buayishamu Kutilike,Abliz Yimit
This study concerns the development of a maghemite (γ-Fe2O3)-coupled tetra sulfophenyl porphyrin (TSPP) thin film–based optical waveguide (OWG) sensor (TSPP-γ-Fe2O3-OWG) for the detection of ethylenediamine (EDA). For ease of manufacture, we fabricated sensors using a spin-coating technique, and characterized their response based on their ultraviolet-visible (UV-vis) absorption spectra and the response intensity of OWG sensor. We have observed significant changes in the location of the peaks in the sensor’s UV-vis absorption spectra after exposed to EDA gas, indicating aggregation of TSPP. Optical characterization confirmed that the combination of TSPP with maghemite (TSPP-γ-Fe2O3-OWG) had improved device response, with twice as high as those of the acid-treated TSPP-OWG sensor, and 30 times higher than that of the pure γ-Fe2O3-OWG sensor. At ambient temperature, the composite sensor exhibited a linear response to EDA gas in the concentration range of 0.1–1000 ppm with signal-to-noise ratio (S/N) 8.33, confirming that the improved stability of the composite TSPP-γ-Fe2O3 thin-film OWG enables the detection of trace amounts of gas with high sensitivity and selectivity.
研究领域:
材料科学
·
化学传感器
·
光学器件
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高影响因子
危险品化学品经营许可证（带存储）