JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2015
·
IF 3.615
Junmei Liang,Ranran Ding,Yulong Wu,Yu Chen,Kejing Wu,Yongqiang Meng,Mingde Yang,Yaowu Wang
Hydrotreatment of heteroatomic model compounds in microalgae-based bio-oils into diesel-like hydrocarbons was carried out over carbon nanotubes (CNTs)-supported β-Mo 2 C catalyst with superior activity and selectivity under a mild condition (≤200 °C). The results show that stearic acid and hexadecanamide can be completely converted into n -C 15 –C 18 alkanes over β-Mo 2 C/CNTs catalyst. The β-Mo 2 C/CNTs favors the pathway of hydrogenation–dehydration–hydrogenation to produce n -octadecane with an optimal yield of 91.24% at a lower temperature of 180 °C during hydrotreating process of stearic acid. The recycle tests demonstrate that the β-Mo 2 C/CNTs exhibits excellent stability, and can be reused for seven times consecutively without reduction of catalytic stability. Based on the determined products, a brief reaction pathway is proposed. Therefore, a novel approach to produce diesel-like hydrocarbons via catalytic hydrotreatment of microalgae-based bio-oils over β-Mo 2 C/CNTs is introduced, which provides a basic research as well as technical parameters for its further industrialization.
研究领域:
能源生物学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2024
·
IF 8.1
Yanzhi Cai,Dengpeng Chen,Laifei Cheng,Siyu Guo,Zhongyi Hu,Yuhan Wang,Haiming Yu,Yuan Zhou
The performance of sensors is often limited by the structural characteristics of the single form of conductive filler, making it difficult for sensors to simultaneously consider the broad sensing range and high sensitivity. How to achieve high sensitivity and broad working range of sensors through innovative sensing materials and sensor structure design remains a challenge. Here, a flexible sensor with multidimensional sensing materials and a double-layer structure is constructed. It consists of a high-performance CNTs@Ag-MXene-TPU sensing layer and a TPU flexible layer with significant deformability. Thanks to the synergistic effect of the double-layer structure and multidimensional sensing materials, this sensor has a high sensitivity of up to maximum gauge factor of 12216.3 and a wide sensing range of 300 %. Its response time and recovery time can reach 200 and 250 ms, respectively, and it also exhibits excellent cycling stability.
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
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 2
·627-633
·
IF 1.093
Wang Xiaobing,Zhu Huijuan,Shi Xiuyi,Qiu Xiuzhen,Lu Wenguan,Guo Huishi
A hybrid nanocomposite containing a moisture-resistant surface based on MOF-199 and carbon nanotubes (CNTs) was synthesized. Characterization was undertaken using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR).
The adsorption behavior of the MOF-199/CNTs composite to ibuprofen was then investigated at room temperature. Experimentation revealed that the hybrid absorbent had excellent adsorption capacity for the nonsteroidal anti-inflammatory drug (NSAID), ibuprofen, with maximum adsorption up to 40.8
mg/g. The adsorbent was able to be recycled several times without deactivation. Finally, the MOF-199/CNTs composite was used as the extraction sorbents for selective extraction of ibuprofen, ketoprofen and naproxen in human urine. The results showed successful application of the nanocomposite
to NSAID analysis in spiked human urine samples. Recoveries at three concentrations were 89.7–96.8%, 79.3–85.5% and 95.6–97.5% for ibuprofen, ketoprofen and naproxen, respectively. The relative standard deviations (RSDs) were within the range of 2.9–5.3%. The results
demonstrated that the MOF-199/CNTs composite is an excellent adsorbent for determination of NSAIDs in spiked urine samples.
研究领域:
分析化学
·
药物分析
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Qingnan Wu,Ming Wen,Shipei Chen,Qingsheng Wu
Ni(OH) 2 /CNTs/Ni(OH) 2 lamellar-crossing-nanostructure with a single lamellar spacing of ∼5 nm was effectively constructed through two-phase-interface reaction process followed by the CNTs crossed among the lamellar-nanostructured Ni(OH) 2 . The resultant nanocomposite can offer large active surface areas and short diffusion paths for electrons and ions, and is investigated as a potential pseudocapacitor electrode material for electrochemical energy storage applications. Electrochemical data demonstrate that the as-prepared nanocomposite exhibits a high specific capacitance of ∼1600 F g −1 at the scan rate of 1 mV s −1 in 6 M KOH solution at normal pressure and temperature, which is great higher than Ni(OH) 2 (∼1200 F g −1 ). Furthermore, Ni(OH) 2 /CNTs/Ni(OH) 2 nanocomposite shows a higher energy density (∼125 Wh kg −1 , 2 A g −1 ) and has a slightly decrease of 5% in specific capacitance after 1000 continuous charge/discharge cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Lianpeng Lv,Xiaojing Kang,Lubin Hua,Zejian Du,Ruixue Sun,Yefeng Deng,Hailiang Yang,Zheng Xu,Yang Zhou,Bing Wang
Effective identification of excavated leather artifacts assumes a crucial role in the subsequent restoration and protection of the artifacts, and on a deeper level, it holds significant implications for the history and culture represented by the artifacts. Existing approaches fail to address the pain points of micro-trace detection and species identification. In this work, two-dimensional transition metal carbonitrides/carbon nanotubes (MXene/CNTs) and metal organic frameworks (MOFs) were employed as electrochemical immunosensor materials to construct and utilize a sandwich-type immunosensor for the first time to detect leather artifacts. The sensor exhibits a wide linear detection range of 10 −1 –10 3 ng/mL and an extremely low detection limit of 83 pg/mL, which can fulfill the requirements of ultra-sensitive detection. In addition, the sandwich electrochemical immunosensor demonstrates excellent specificity and stability, with the redox peak current value retaining over 95 % of the original value after 10 repeats of cyclic voltammetry (CV) and more than 85 % of the original peak current after one week of differential pulse voltammetry (DPV), with an RSD of 0.767 %. The immunosensor achieves satisfactory outcomes in both qualitative and quantitative detection when analyzing leather artifacts and micro-traces, and its performance surpasses that of existing methods. Therefore, this work not only introduces novel materials for the construction of sandwich immunosensors but also provides new concepts and approaches for archaeological detection of cultural relics.
研究领域:
考古学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Junlin Zhu,Zhaotian Ba,Yuanmeng Lou,Cui Li,Lili Ma,Jie Liu,Xin Wen,Tao Tang
To effectively mitigate the environmental and ecological impacts stemming from polymer wastes, the development of innovative recycling and reusing strategies is of utmost importance. In response to the call of “Waste-to-Wealth”, this study presents a green and efficient method to convert waste polypropylene (waste protective cloths, WPC) into Ni@CNTs hybrids via catalytic carbonization. Subsequently, these Ni@CNTs hybrids are directly applied as functional nanofillers to prepare fire resistant polycarbonate (PC) composites. The experimental results demonstrated that the combined catalysts composed of NiCl 2 /Ni(C 5 H 7 O 2 ) 2 were efficient in catalyzing WPC into Ni@ CNTs hybrids, achieving the yield was as high as 58.6 g/100 g WPC. Leveraging the superior characteristics of Ni@CNTs hybrids, they were used as a fire retardant of polycarbonate (PC) matrix to fabricate PC/Ni@CNTs composites. The PC/3Ni@CNTs exhibited excellent fire retardancy, as evidenced by the limited oxygen index (LOI) of 30.5 %, the V 0 rating in UL-94 vertical burning test, and the 64.1 % reduction in the peak of heat release rate (PHRR) in cone calorimeter test. Meanwhile, it displayed low toxicity with 75.0 % reduction in the peak of CO production (COP). The mechanism was attributed to the synergistic effects of Ni and CNTs, which combine the catalyzing carbonization and the enhanced char layer together in condensed phase. Thus, this study provides a green and sustainable strategy for the conversion of polymer wastes into high-valuable carbon/metal hybrids, and exploits their advanced application in the fabrication of fire-resistant polymer composites.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lu Cui,Di Wu,Xiaomei Liu,Yang Li,Xiaobin Fan,Fengbao Zhang,Guoliang Zhang,Wenchao Peng
In this study, free-standing Co 3 O 4 -CuO/CF electrodes are synthesized via an electrodeposition-annealing process and then protected by dip-coated carbon nanotubes (CNTs). The obtained Co 3 O 4 -CuO@CNTs/CF is employed as cathode to activate peroxymonosulfate (PMS) for the degradation of Bisphenol A (BPA) in an electrochemical system. The electrochemical assistant (EA) plays a critical role to accelerate metal redox by donating electrons sustainably, and the fast regeneration of Co 2+ /Cu + could be achieved to promote chemical-catalysis for PMS activation, which is proved via the pre-electroreduction treatment. The rate constant of Co 3 O 4 -CuO@CNTs/CF/PMS system with EA is ∼ 4.4 times compared to the system without EA. It also exhibits an excellent stability, which could still remove over 90% of BPA after eight cycles in 45 min. In addition, the coating of CNTs could decrease leaching of metals effectively. According to quenching tests and electron spin-resonance spectroscopy (ESR), the presence of EA could enhance the radical route by producing more SO 4 •− and •OH greatly, which is also proved by much faster degradation of carbamazepine (CBZ) and atrazine (ATZ) than that without EA. This work reveals activation mechanism of PMS in the electrochemical system, and provides an effective strategy to achieve the fast metal redox cycle for effective and long-term pollutant degradation.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Panpan Liu,Yang Li,Zhaodi Tang,Junjun Lv,Piao Cheng,Xuemei Diao,Yu Jiang,Xiao Chen,Ge Wang
Developing advanced nanocomposite integrating solar-driven thermal energy storage and thermal management functional microwave absorption can facilitate the cutting-edge application of phase change materials (PCMs). To conquer this goal, herein, two-dimensional MoS 2 nanosheets are grown in situ on the surface of one-dimensional CNTs to prepare core-sheath MoS 2 @CNTs for the encapsulation of paraffin wax (PW). Benefiting from the synergistic enhancement photothermal effect of MoS 2 and CNTs, MoS 2 @CNTs is capable of efficiently trapping photons and quickly transporting phonons, thus yielding a high solar-thermal energy conversion and storage efficiency of 94.97%. Meanwhile, PW/MoS 2 @CNTs composite PCMs exhibit a high phase change enthalpy of 101.60 J/g and excellent long-term thermal storage durability after undergoing multiple heating–cooling cycles. More attractively, PW/MoS 2 @CNTs composite PCMs realize thermal management functional microwave absorption in heat-related electronic application scenarios, which is superior to the single microwave absorption of traditional materials. The minimum reflection loss (RL) for PW/MoS 2 @CNTs is −28 dB at 12.91 GHz with a 2.0 mm thickness. This functional integration design provides some insightful references on developing advanced microwave absorbing composite PCMs, holding great potential towards high-efficiency solar energy utilization and thermally managed microwave absorption fields.
研究领域:
材料科学
·
纳米技术
·
能量存储
·
热管理
·
微波吸收
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Jianfeng Chen,Ran Hou,Sen Li,Chuanxi Sun,Kai Peng,Yichuan Dai,Xiaoxiao Chen
As the quintessential material for flexible sensors, conductive hydrogels face an inherent sensitivity-sensing range paradox and electrical-mechanical balance, which significantly curtail its applicability in multiscale motion detection. Inspired by the spider slit sensor, PAM/CNTs-Au hydrogel microcrack sensor is obtained by depositing conductive gold film on the surface of PAM/CNTs hydrogel using magnetron sputtering. By modulating the cross-linking density of conductive hydrogels and the content of carbon nanotubes (CNTs), it is possible to tailor the mechanical properties and adhesion of PAM/CNTs-Au hydrogel crack-based sensors. This self-adhering flexible sensor aids in minimizing detection errors arising from mechanical mismatch between flexible sensors and human tissues. Moreover, the exceptional electrical conductivity of CNTs, coupled with their unique one-dimensional structure, facilitates the formation of an interconnected conductive network "bridge" within the hydrogel. The harmonization of electrical and mechanical attributes in the PAM/CNTs flexible substrate is achieved by finely tuning the crosslinking density of the PAM hydrogel and the content of carbon CNTs. Simultaneously, the high-conductivity "islands" formed by the Au conductive layer during stretching ensures elevated sensitivity (gauge factor (GF) = 54.89) over an extensive detection range (>1200%). The distinctive "island-bridge" configuration of the PAM/CNTs-Au hydrogel microcrack sensor effectively suppresses crack propagation, thereby markedly augmenting the sensor's stability. Successful monitoring of physiological and motion signals across various scales attests to the potential of the PAM/CNTs-Au hydrogel microcrack sensor in wearable biosensor.
研究领域:
生物医学工程
·
柔性电子材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liang Li,Shao-zhong Hu,Ting Huang,Nan Zhang,Yong Wang
Constructing heterogeneous catalyst with different bandgaps is a prospect way to realize efficient charge transfer of catalytic redox reaction. Semiconductor-based catalyst as a prospective material can effectively solve sewage issues under light irradiation, but the efficiency is greatly influenced by the recombination rate of photoelectrons and holes. In this work, cerium dioxide (CeO 2 ) nanoparticles (NPs) were grown in-situ on carbon nanotubes (CNTs), which can maintain the pollutant removal efficiency of pure CeO 2 NPs and enhance the adsorption intensity under visible light for CeO 2 @CNTs composite. Furthermore, the introduction of cadmium selenide (CdSe) was conducive to establish built-in electronic field in the ternary CeO 2 @CNTs/CdSe catalyst, which effectively enhanced the catalytic activity of CeO 2 @CNTs/CdSe. In comparison to CNTs, CdSe, CeO 2 and CeO 2 @CNTs composite, the ternary CeO 2 @CNTs/CdSe catalyst exhibited higher photocurrent intensity, lower recombination of photoelectrons and holes (e - /h + ) pairs, indicating much better photocatalytic activity. CeO 2 @CNTs/CdSe as photocatalyst displayed excellent adsorption ability for Congo red (CR), which contributed to increase the transparency of reaction solution and improve the utilization rate to light, the evaluated degradation efficiency of CR achieved 83.58 % and the reduction ratio of Cr(VI) was nearly 100 %. This work confirms that CeO 2 @CNTs/CdSe composite with excellent adsorption and photocatalytic ability is a promising photocatalyst material in wastewater treatment.
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
CHEMOSPHERE
·
2023
·
IF 8.8
Yujie Tan,Hui Xu,Ruchen Shu,Zhi Liu,Lijie Song,Ruina Zhang,Chuang Ouyang,Min Xia,Jianyuan Hou,Xinzhong Zhang,Yuan Yuan,Zhang Renxi
Formaldehyde as one of the typical indoor pollutants has long been concerned as it can pose a threat to human health. TiO 2 /CNTs composite with oxygen vacancies and multitype carbon doping (C–TiO 2 /CNTs) was fabricated using nonthermal plasma for the photocatalytic degradation of formaldehyde. The maximum degradation rate of formaldehyde was 93% and 83% via the new catalyst (with 5% CNTs content) under solar and visible light, respectively. The characterization of the catalyst confirmed the in-situ multitype carbon doping and oxygen vacancies: interstitial carbon doping and oxygen vacancies could dramatically reduce the bandgap and contribute to the improved absorption capability of formaldehyde and electrons. Interfacial carbon doping in the form of C– O –Ti bonds provided a migration channel, whereby photogenerated electrons could efficiently transfer from CNTs to TiO 2 and then quench the holes left in the VB of TiO 2 . Therefore, the multitype carbon doping and oxygen vacancies can expand the light response as well as promote the separation of photo-generated electron/hole pairs. EPR results and experiment section indicated that O 2 · − plays the most significant role in formaldehyde removal due to the reverse transfer of the electrons. This work advances the understanding of photo-degradation of TiO 2 /CNTs composite and provides a new route for the abatement of formaldehyde.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 2
·1-14
·
IF 2.5
Ding Jianjun,Ye Li,Su Tong,Guo Naiyu,Yu Linbo,Miao Longxin,Cao Mian,Sun Chao
Surface-enhanced Raman scattering (SERS) features a unique fingerprint spectrum for fast and highly sensitive non-destructive detection without sample pretreatment. Aiming at the problem of few “hot spot” and uneven distribution of traditional SERS substrate, in this work, a surface-enhanced Raman substrate of silica/carbon nanotubes/silver nanoparticles (SiO 2 /CNTs/AgNPs) with high on all sides and low in the middle was synthesized by hydrothermal synthesis. The AgNPs were characterized by transmission electron microscopy (TEM), and the average diameter was 38 nm to 63 nm. The substrate exhibited high sensitivity, stability, and uniformity with a detection limit of 10 −12 M for rhodamine 6G (R6G). Furthermore, we conducted an in-depth research on the enhancement contribution of the substrate by finite-difference time-domain (FDTD); the simulation results were in good agreement with the experimental results. Finally, the substrate was used for the detection of phenol red in water; the results showed that the Raman intensity was exponentially related to the concentration of phenol red solution with the coefficient of determination R 2 = 0.99991, which provided a new method for detecting water pollutants. Graphical Abstract
研究领域:
分析化学
·
环境科学
·
纳米技术
✓ 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）