CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Xiaotian Wang,Chenyu Yang,Pingzhou Wang,Chun Shen
The development of Ni-based catalyst with simultaneous outstanding catalytic performance and low cost and the exploration of nitrobenzene hydrogenation mechanism are in urgent need but still remain a severe challenge. Herein, a nickel phyllosilicate (Ni@Si) catalyst in which Ni species are stabilized by SiO x ligands is successfully prepared and applied in nitrobenzene hydrogenation to obtain aniline, exhibiting excellent catalytic performance (∼97.6% yield). A combination study reveals that the Ni 0 and Ni 2+ species cooperatively catalyze the reaction and govern the catalytic performance of the rate-determining step, namely N O group reduction. Specifically, Ni 0 species facilitates activation and dissociation of H 2 , while Ni 2+ species accounts for the adsorption of N O group via the lone electron pairs in oxygen. This work would pave the way to the rational design of efficient Ni-based catalysts and deepen the fundamental understanding for nitrobenzene hydrogenation.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Shikun Hou,Ying Wang,Feng Gao,Hua Yang,Fei Jin,Li Ren,Qiong Wu,Hongliang Ge,Yahui Wang
This paper proposes a new and unprecedented strategy for designing efficient and ultra-light electromagnetic wave (EMW) absorbing materials. The strategy utilizes a nano-antenna arrays structure to capture EMW. Specifically, CoNi-layered double hydroxide (CoNi-LDH) nanoneedles are designed on the surface of carbon fiber cloth (CFC) using a solvothermal method, whereafter an in situ chemical oxidative polymerization process is employed to construct polyaniline (PANI) coating on these CoNi-LDH nanoneedles. The resultant composite, named PANI@CoNi-LDH@CFC, possesses the unique shell-core PANI@CoNi-LDH nano-antenna arrays and thus exhibits enhanced EMW absorption performance. The PANI@CoNi-LDH@CFC composite obtains an effective absorption bandwidth of 14.8 GHz (1.0–5.0 mm) and a minimum reflection loss of −57.6 dB. In particular, computer simulation technology confirms that the radar cross section values of PANI@CoNi-LDH@CFC are lower than −16.4 dBm 2 in the range of −60°<θ < 60°, indicating a high radar wave attenuation ability. This work pioneers the research on design of nano-antenna arrays structure to strengthen EMW capture and opens up a unique path for constructing high-performance EMW absorbing materials.
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ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Ziyi Xu,Ji Zhou,Dan Li,Ge Zhu,Ning Lin
Polyaniline (PANI) has indeed received significant attention and extensive research in both academic and electronic industrial fields. Its unique properties, such as conductivity and processability, make it a promising material for various applications. Researchers and industrialists have explored PANI for its potential use in electronic devices, such as sensors, batteries, capacitors, and actuators, as well as in other areas like corrosion protection, supercapacitors, and electromagnetic shielding. The poor compatibility, tendency to aggregate, and poor mechanical properties of nanostructured PANI have hindered its performance. Cellulose nanocrystals (CNCs) were used as a bio-template for covalent grafting PANI onto hydrophilic CNCs (CNC-g-PANI) through in situ oxidative polymerization. The resulting CNC-g-PANI suspension with the sodium alginate (SA) matrix was wet-spun into composite fibers, which were compared to composite fibers made by physical blending of pure PANI and hydrogen-bonded CNC/PANI. The parameters were characterized to investigate the performance of the composite fibers. The covalent grafted CNC-g-PANI suspension maintained stable dispersion throughout the wet spinning process, making it suitable for both fundamental research and industrial processing. Indeed, the development of CNC-g-PANI@SA composite fibers through the covalent grafting of PANI onto cellulose nanocrystals offers a simple and eco-friendly approach. These composite fibers exhibit improved properties, including enhanced tensile strength, electrical conductivity, flexibility, and fatigue resistance. These attributes make them highly suitable for applications in the antistatic textile and electronic industries.
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BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
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2023
·Vol. 96
·期 9
·907-912
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IF 4
Meng Taotao,Li Zhengtong,Wang Luzhen,Shi Kangjie,Bu Xiangting,Alshehri Saad M,Bando Yoshio,Yamauchi Yusuke,Li Dagang,Xu Xingtao
Owing to their cost-effectiveness and renewability, wood-based solar steam generators (WSSG) have gained prominence in the field of desalination and water purification. However, conventional bi-layered WSSG is limited by the high energy consumption of fabrication and low strength of the bonding interface, which makes them unsuitable for long-term applications. Here, a unique bi-layered structural composite with polyaniline (PANI) nanorods uniformly incorporated into a 3D mesoporous matrix of natural wood was fabricated via a one-step in-situ polymerization strategy. The PANI decorated wood (PANI-wood) shows ultrahigh sunlight absorptance (∼98.9%) over a broad wavelength range (200–2500 nm) due to the conjugation of coralloid PANI nanorods and wood. Moreover, numerous aligned wood microchannels enable constant and rapid water transport at the air-water interface under the pressure of capillary forces. The highly stable PANI-wood composite shows high potential as an ideal solar steam generator with a high evaporation rate of 1.62 kg m2 h−1, which is significantly higher than those of other previously reported wood-based bi-layered composites. Moreover, PANI-wood exhibits long-term floating and is chemically stable, making it a potential candidate for low-energy photothermal interfacial sewage purification.
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ACS Applied Materials & Interfaces
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2023
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IF 9.5
Gongwen Tang,Chong Chen,Dongxia Wu,Zhishan Yan,Tingting Ren,Xiangyu Hou,Man Zhao,Shancan Fu,Lihua Fan
The corrosion resistance of the waterborne epoxy coating is poor during long-term service, which greatly limits its widespread application. In this paper, the halloysite nanotubes (HNTs) were modified by polyaniline (PANI) and then used as nanocontainers to encapsulate the green corrosion inhibitor praseodymium (III) cations (Pr3+), obtaining HNTs@PANI@Pr3+ nanoparticles. A scanning electron microscope, transmission electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis were applied to characterize the formation of PANI and the absorption of Pr3+ cations. The corrosion-inhibiting ability of the HNTs@PANI@Pr3+ nanoparticles for iron sheets and the anticorrosion properties of the nanocomposite coatings were evaluated by the electrochemical impedance spectroscopy technique. The results indicated that the coating containing HNTs@PANI@Pr3+ nanoparticles exhibited excellent anticorrosion performance. After immersion in 3.5 wt % NaCl solution for 50 days, its Zf=0.01 Hz value was still as high as 9.4 × 108 Ω cm2. The icorr value was 3 orders of magnitude lower than that of the pure WEP coating. The excellent anticorrosion property of the HNTs@PANI@Pr3+ coating could be attributed to the synergy of three beneficial factors, including evenly distributed nanoparticles, PANI, and Pr3+ cations. This research will provide theoretical and technical support for the development of waterborne coatings with high corrosion resistance.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2023
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IF 4.3
Xia Jiaojiao,Liu Feng,Yan Lishi,Suo Hongbo,Qian Jingya,Zou Bin
In this study, a Zinc porphyrin based covalent organic framework (COF-366-Zn) was synthesized by imine condensation reaction . And the multi-walled carbon nanotubes(MWCNTs) were interspersed on COF-366-Zn to enhance the electron transfer between the material and the electrode surface. The composite material was used to design a COF-366-Zn/MWCNTs/Nafion/GCE sensor. The sensor performance for simultaneous electrochemical detection of antioxidants was investigated. It was found that the COF-366-Zn/MWCNTs/Nafion/GCE sensor could simultaneously detect tert-butylhydroquinone (TBHQ), butylated hydroxyanisole (BHA) and phenol in actual samples with good detection performance. At the same time, the mutual interference between the three analytes was studied. The detection limits are 0.025 μM, 0.056 μM and 0.051 μM, respectively. In addition, the sensor also exhibits excellent anti-interference performance and storage performance.
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International Journal of Electrochemical Science
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2023
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IF 1.5
Zupeng Yan,Hao Zheng,Jianfang Chen,Ying Ye
A glucose biosensor was developed by immobilizing glucose oxidase (GOD) into the micro network of polyacrylonitrile (PAN)-polyaniline (Pani)-graphene (GRA) hybrid nanocomposite fabricated through phase inversion process. PAN with molecular weight of M w around 2.93×10 4 was synthesized by single rare-earth catalyst-Y(OAr) 3 and GRA with few-layers was prepared by electrochemical expansion of graphite in propylene carbonate electrolyte, respectively. The morphologies of nanocomposites and the fabricated process of biosensor were performed by scanning electron microscopy (SEM). The cyclic voltammetry (CV) was employed to evaluate electrochemical performance of the as-prepared biosensor. The apparent activation energy (Ea) of enzyme-catalyzed reaction based on Arrhenius equation was estimated to be 16.21 kJ mol -1 . The constructed glucose biosensor exhibited a short response time within 5 s, and a superior storage stability of preserving 96.28% of the original response over a period of 2 weeks and 91.95% of that even after a month. The linear range, sensitivity, detection limit, anti-interference, and practical application were also investigated. The micro network of PAN-Pani-GRA hybrid nanocomposite provides a hopeful candidate for construction of biosensors.
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International Journal of Electrochemical Science
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2023
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IF 1.5
PeiPei Li,RenChun Fu,Du Jun,Hui Huang,ZhongCheng Guo
The nature of the electrode surface plays an important role in the electrode reaction. In this study, Pb- Ag alloy anodes modified with polyaniline films were prepared by galvanostatic polymerisation. Linear scanning voltammetry (LSV), cyclic voltammetry and potentiodynamic polarisation were measured and compared with those of unprepared Pb-Ag (0.3 wt%) alloy anodes. The oxygen evolution reaction potential of the modified anodes was lower than that of the unprepared Pb-Ag (0.3 wt%) anode at same anodic current density. The corrosion resistance of the modified anode was better than that of the unprepared Pb-Ag (0.3 wt%) anode. SEM images were obtained to characterise the morphology of the polyaniline film, and FTIR spectra confirmed that the film coating the Pb-Ag alloy was polyaniline.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Yanjuan Dong,Hou-Yong Yu,Yonghao Tian,Xiang Yao,Bin Xue,Dewen Xu,Fengyuan Zou,Qingling Mi
The polyvinyl alcohol (PVA)-based electronic skin with skin-like features and functions has shown great promise in wearable electronics, but traditional physical methods do not provide multiple interfacial bonds to result in poor mechanical properties, weak conductivity, low sensitivity, and healing ability for further hindering their practical application. In this work, novel alternating spraying technology driven by the Marangoni effect was used to address this challenge and took advantage of the interfacial bond and compatibility between nanocellulose–polyaniline (CNC–PANI) and PVA/CNC films to prepare self-assembled PVA/nanocellulose polyaniline (PVA/CP) electronic skin. Among them, the optimal PVA/CP electronic skin exhibited excellent mechanical performances (stress up to 78.2 MPa), large conductivity (648 mS/m), and high sensitivity (gauge factor = 22.7) with good self-healing abilities (healing efficiency 73.5%). Furthermore, it was designed and integrated into a multi-point sensing system for non-overlapping Morse code communication and real-time monitoring of human health during fitness exercise. Therefore, such high-performance PVA/CP electronic skin is expected to play a demonstration role in a new generation of sustainable wearable electronics.
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ACS Applied Energy Materials
·
2023
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IF 6.4
Xueyu Tao,Shifang Ye,Kehu Zhu,Liyang Dou,Peixin Cui,Jie Ma,Cheng Zhao,Xianyong Wei,Litong Guo,Akbar Hojjati-Najafabadi,Peizhong Feng
Although flexible supercapacitors (FSCs) have attracted tremendous attention, synthesis of supercapacitor electrodes that have outstanding electrochemical performance and excellent flexibility remains a continuous dilemma. Herein, conductive polymer composite hydrogels were synthesized via in situ polymerization of aniline (ANI) in a mixture of polyvinyl alcohol (PVA) and carbon nanotubes (CNTs), for which amino trimethylene phosphonic acid (ATMP) was employed as an organic doping acid. The as-prepared polyaniline (PANI)/PVA/ATMP/CNTs (PPAC) composite hydrogel electrodes exhibit a specific capacitance of up to 389.5 F g–1 at 0.5 A g–1, satisfactory long-term cycling stability (83.87% capacitance retained after 10,000 charge/discharge times), and outstanding flexibility (97% capacitance retained over 200 repeated bends), and the incorporation of ATMP enhanced electrochemical performances of PPAC composite hydrogel electrodes. Besides, the synergistic effects offered by high electrical conductivity of CNTs, pseudocapacitance of PANI, and the doping effect of ATMP may further contribute to the excellent electrochemical behavior of hydrogel electrodes. The result of the energy storage mechanism implied that the electrochemical process of the PPAC composite hydrogel electrode involved both diffusion-controlled and surface capacitive processes. The all-hydrogel-state FSC based on the PPAC hydrogel electrode shows a favorable energy density of 12.8 W h kg–1 at 125.0 W kg–1 as well as long-life stability of 77.31% capacitance retention after 10,000 charge/discharge cycles. This work is promising for the preparation of high-performance composite hydrogel electrodes for wearable and flexible energy storage devices.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 9
·1-14
·
IF 5.7
Mo Guichun,Qin Dongmiao,Wu Yusheng,Luo Zhi,Mo Keting,Deng Biyang
Abstract A new electrochemiluminescence (ECL) cytosensor is proposed for the simultaneous determination of phosphatidylserine (PS) and epidermal growth factor receptor (EGFR) based on the ECL signals of metal-organic framework-5 (MOF-5) loaded CdS quantum dots and N-(aminobutyl)-N-(ethylisoluminol)-polyethylenimine capped Au and Ag nanoparticles. Apoptosis promotes the exposure of PS and reduces the expression of EGFR in cell membranes. Two spatially resolved areas on dual-disk glassy carbon electrodes were designed to eliminate the interference from different ECL probes. Using HepG2 cells treated with resveratrol to induce apoptosis, the cytosensor exhibited high sensitivity, simplicity, and high reproducibility, demonstrating its potential in drug screening and rapid apoptotic cell detection. The strategy reported provides a promising platform for the highly sensitive cytosensing and convenient screening of clinically relevant anticancer drugs. Graphical Abstract
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CHEMOSPHERE
·
2023
·
IF 8.8
Tianyuan Xu,Ting Chen,Zhenhua Chen,Yijun Cao,Yaowen Xing,Xiahui Gui
A photochemical system combining iron (hydr)oxides and oxalate (Ox) shows application prospects in wastewater treatment due to the abundance of reactive oxygen species (ROS) generation. Nevertheless, it is a challenge to the investigate photochemical activity of iron (hydr)oxides/Ox systems with varying structural properties. Herein, the photochemical behaviors of Ox on goethite (Gt) surface from the view of structural dependent activity, containment degradation, and ROS generation were explored in detail. Results confirmed that bidentate mononuclear was formed on Gt surface after complexing Ox. Combined with density functional theory calculation and pH time evolution during aniline degradation, the photochemical activity of the Gt/Ox system fell in between that of ferrihydrite/Ox and hematite/Ox systems. After irradiating 120 min visible light, 96.5% aniline was degraded by 1.0 mM Ox and 0.2 g/L Gt. The amount of •OH in vis/Gt/Ox system could be up to 309.3 μM and its generation was closely associated with Fe(II) while slightly affected by the generated H 2 O 2 . Moreover, as revealed by high-performance liquid chromatography with mass spectrometric and Ecological Structure Activity Relationships software, the toxicity of the intermediates of aniline degradation in the vis/Gt/Ox system towards fish and green algae increased first but then declined accompanied by the generation of non-toxic ring-opening products at the end of reaction. According to the findings in the presented study, it could be concluded that vis/Gt/Ox is a promising approach to wiping out aniline wastewater.
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