ANALYTICA CHIMICA ACTA
·
2010
·
IF 3.757
Mingming Liu,Xin Zhou,Yingyi Chen,Hanlan Liu,Xionghan Feng,Guohong Qiu,Fan Liu,Zhaorui Zeng
In this work, two allyl-functionalised ionic liquids (ILs), 1-allyl-3-methylimidazolium hexafluorophosphate and 1-allyl-3-methylimidazolium bis(trifluoromethanesulphonyl)imide, were used as selective coating materials to prepare chemically bonded ILs-based organic–inorganic hybrid solid phase microextraction fibres. These fibres were prepared with the aid of γ-methacryloxypropyltrimethoxysilane as bridge using sol–gel method and free radical cross-linking technology . The underlying mechanisms of the sol–gel reaction were proposed, and the successful binding of these functional ILs to the sol–gel substrate was confirmed by Fourier transform infrared spectroscopy . These IL-based sol–gel coatings had porous surface structure, high thermal stability , a wide range of pH stability, strong solvent resistance and good coating preparation reproducibility. They also had high selectivity and sensitivity towards strong polar phenolic environmental estrogens (PEEs) and aromatic amines due to the strong electrostatic interactions , hydrogen bonding and π–π interactions provided by the special molecular structure of these imidazolium ILs. Moreover, their characteristics were somewhat different depending on the type of anions in the IL structure. The practical applicability of these IL-based sol–gel coatings was evaluated through the analysis of PEEs in two real water samples. The detection limits were quite low, varying from 0.0030 to 0.1248 μg L −1 . The linearity was very good in the range of 0.1 to 1000 μg L −1 for most analytes, and the relative standard deviation values were below 6%. The relative recoveries were between 83.1 and 104.1% for lake water and between 89.1 and 97.1% for sewage drainage outlet water.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Daping Hu,Yuhang Jia,Shaopei Yang,Fuyao Huang,Yuman Dong,Pengcheng Du
Porous organic polymers (POPs) have been received considerable attention due to their advantages of large surface areas, good stability and functionalities, which are considered an ideal electrode material for the energy storage device that has been developed and applied in lithium batteries, zinc ion batteries and supercapacitors. Here we describe the synthesis of four kinds of redox-active 2D POPs via solvothermal Schiff base condensation using aniline oligomers with different chain lengths as building units that exhibit reversible electrochemical processes. Among them, the Tp-AT-POP based on 1,3,5-triformylphloroglucinol (Tp) and aniline trimer (AT) deliver high electrochemical performance mainly contributed by redox units exhibiting high specific capacitance up to 348.3 F/g at a current density of 0.5 A/g and possessing excellent cycling stability of 71% after 5000 cycles. In addition, the Tp-AT-POP is developed to assemble a symmetric supercapacitor with specific capacitances of 167 F/g at 0.3 A/g and good cycling stability. This work provides an efficient strategy for developing the redox-active 2D POPs with aniline oligomer structure for the next-generation advanced high-performance energy storage device.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yibo Zhang,Zhihua Li,Mengmei Liu,Jun Liu
Rechargeable aqueous zinc-ion batteries (ZIBs) have received considerable attention for large-scale energy storage applications due to the unique merits of high energy density, eco-friendliness and reliable safety. However, the development of high performance cathodes is still hampered by their inferior reversibility and sluggish Zn 2+ diffusion kinetics, resulting in insufficient rate capability and poor cycling performances. Herein, we employed a feasible “two-in-one” strategy to intercalate conductive polymer (polyaniline, PANI) as pillar molecules into the V-MOF-derived hierarchical porous V 2 O 5 (designated as PVO) and used as cathode for high-performance ZIBs. The high specific surface area and nanobelt-like porous structure endowed PVO with abundant accessible electrochemical active sites and shortened the electrons/ions transfer pathways, further delivering a high discharge capacity (489 mAh g −1 at 0.1 A g −1 and 97.2% capacity retention after 100 cycles). Meanwhile, the intercalation of PANI not only effectively expanded the Zn 2+ diffusion channels, but also improved the structural stability during cycling as “interlayer pillars”. More importantly, the introduction of PANI could enhance the conductivity of the overall structure and weaken the electrostatic interaction between Zn 2+ and PVO host, thereby suppressing the collapse of the layered structure. Accordingly, the obtained PVO cathode exhibited excellent rate capability (375 mAh g −1 at 5.0 A g −1 ) and satisfactory cycling stability (91.8% capacity retention after 2000 cycles at 8.0 A g −1 ). Moreover, the reversible Zn 2+ storage mechanism was further investigated by kinetics analysis and DFT calculations. These ideal results provide key insights into the design of MOF-based cathode materials for high-performance aqueous zinc ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hongmei Qin,Jinhui Song,Man Liu,Yibo Zhang,Shiyu Qin,Hang Chen,Kangdi Shen,Shan Wang,Qi Li,Quanling Yang,Chuanxi Xiong
Polymer dielectrics for high-temperature capacitive energy storage are extremely desirable in modern electronics and electrical systems. However, pure polymer dielectrics operating above 200 °C have yet not been reported. Here, we demonstrate a polymer dielectric polynorbornene-imide (PNI) exhibits excellent energy storage performances at 250 °C owing to simultaneous large optical bandgap (4.3 eV) and high glass transition temperature (265 °C) endowed by the full-carbon backbone and rigid side chain containing benzene ring and the imide group. Significantly, PNI delivers a maximum discharged energy density ( U d ) of 6.04 J/cm 3 at 200 °C and a U d of 2.57 J/cm 3 at 250 °C. More importantly, PNI exhibits a U d above 90% efficiency of 2.8 J/cm 3 at 200 °C, and 0.74 J/cm 3 at 250 °C, outperforming reported all pure polymer dielectrics and polymer composites dielectrics so far. The excellent recycling stability, fast discharge capability and unique self-healing capacity enables it a promising candidate for capacitor films in industry. This work provides a new design strategy for polymer dielectrics under harsh environments.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Hongjie Chen,Junlin Chen,Yang Liu,Bingrui Li,Haofei Li,Xing Zhang,Chuhan Lv,Hua Dong
NH3 gas in human exhaled breath contains abundant physiological information related to human health, especially chronic kidney disease (CKD). Unfortunately, up to now, most wearable NH3 sensors show inevitable defects (low sensitivity, easy to be interfered by the environment, etc.), which may lead to misdiagnosis of CKD. To solve the above dilemma, a nanoporous, heterogeneous, and dual-signal (optical and electrical) wearable NH3 sensor mask is developed successfully. More specifically, a polyacrylonitrile/bromocresol green (PAN/BCG) nanofiber film as a visual NH3 sensor and a polyacrylonitrile/polyaniline/reduced graphene oxide (PAN/PANI/rGO) nanofiber film as a resistive NH3 sensor are constructed. Due to the high specific surface area and abundant NH3 binding sites of these two nanofiber films, they exhibit good NH3 sensing performance. However, although the visual NH3 sensor (PAN/BCG nanofiber film) is simple without the need of any detecting facilities and quite stable when temperature and humidity change, it shows poor sensitivity and resolution. In comparison, the resistive NH3 sensor (PAN/PANI/rGO nanofiber film) is of high sensitivity, fast response, and good resolution, but its electrical signal is easily interfered by the external environment (such as humidity, temperature, etc.). Considering that the sensing principles between a visual NH3 sensor and resistive NH3 sensor are significantly different, a wearable dual-signal NH3 sensor containing both a visual NH3 sensor and resistive NH3 sensor is further explored. Our data prove that the two sensing signals in this dual-signal NH3 sensor mask can not only work well without interference with each other but also complement each other to improve the sensing accuracy, indicating its potential application in non-invasive diagnosis of CKD.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2023
·
IF 5.3
Wensheng Wei,Yuxin Wang,Zizhen Yan,Jiaxiang Hou,Guangwen Xu,Lei Shi
Three quaternary ammonium ionic liquids with strong nucleophilicity and distinctive structures were synthesized with high yield and purity based on the 1,2-propylene glycol anion (CH 3 CH 2 OHCH 2 O - ) derived from transesterification products. Dimethyl carbonate (DMC) was in turn produced via a one-step reaction among propylene oxide (PO), CO 2 , and methanol (MeOH) by using the synthesized ionic liquids. The involved two-stage catalytic reaction of PO-CO 2 cycloaddition and PC-MeOH transesterification was implemented without catalyst separation. Under mild conditions, the PO conversion reached 99.0%, with a PC yield of 99.0%, and a TON value of 119.5. Following the cycloaddition, MeOH was immediately introduced to achieve a PC conversion of 71.2%, a selectivity to DMC above 99%, and a TON value of 57.4 for the transesterification reaction. The influences of temperature as well as time for cycloaddition and transesterification were investigated. Cycloaddition of CO 2 with various epoxides was also examined and all showed good performance. By taking advantage of the decomposability of as-prepared ionic liquids and the recyclability of decomposition products, a new catalyst circulation process was designed to complete the full cycle without introduction of any impurities into the product system.
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Meng Yu,Ying Huang,Xudong Liu,Xiaoxiao Zhao,Wanqing Fan,Kaihang She
MXene exhibits excellent electromagnetic (EM) wave attenuation ability, but its high dielectric constant is prone to impedance mismatch. Usually, the introduction of other components can adjust EM parameters and improve the impedance matching of MXene. In this paper, MXene/polyaniline (PANI) composites with lots of heterogeneous interfaces were designed and prepared by electrostatic self-assembly process, and PANI was used as impedance matching modifier of MXene to adjust the impedance matching of the composites and achieve greater reflection loss. The effect of the content of PANI nanorods loaded on MXene nanosheets on the EM properties of the material was discussed in this work. The maximum reflection loss (RL max ) of −60.6 dB corresponds to an effective absorption bandwidth (EAB) of 6.0 GHz for the composite with only 10% PANI loading, while the EAB reaches 8.64 GHz when the sample thickness is 2.3 mm. Moreover, the introduction of PANI balances the impedance matching of MXene while bridging individual MXene nanosheets to form a three-dimensional structure that increases the EM wave propagation path . The rich loss mechanisms such as interfacial polarization and dipole polarization provide effective attenuation of EM waves. This work provides a simple way to develop lightweight and broadband EM wave absorption materials .
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 7
·2957
·
IF 4.6
Zhenzhen Liu,Xiaofei Lu,Menglin Liu,Wenjing Wang
In this work, multicolor fluorescent carbon dots with red (R-CDs), yellow (Y-CDs), and blue (B-CDs) emissions were prepared by choosing proper aromatic precursors with different amounts of benzene rings through a simple solvothermal method. The characterization showed that the prepared carbon dots were spherical with a size under 10 nm, rich surface functional groups, and good stability. The emission wavelengths were located at 440, 530, and 580 nm under the excitation of 370 nm. The relative fluorescence quantum yield (QY) of R-CDs, Y-CDs, and B-CDs was 11%, 59%, and 33%, respectively. The related characterization demonstrated that the redshift in the photoluminescence was caused by the synergistic effect of the increasing graphitic nitrogen content, quantum size effect and surface oxidation state. By mixing the three prepared CDs into a PVA matrix, the transparent and flexible films produced relucent blue, yellow, and red emissions under 365 nm UV light, and solid-state quenching was effectively avoided. LEDs were fabricated by using B-CDs, Y-CDs, and R-CDs/PVA with a semiconductor chip. These CDs-based LEDs produced bright blue, yellow, and red light with CIE color coordinates of (0.16, 0.02), (0.38, 0.58), and (0.50, 0.49) were successfully manufactured utilizing the prepared blue, yellow and red multicolor carbon dots as the solid luminescent materials. The results showed that the synthesized CDs can be potentially applied in multi-color monitors as a promising candidate for light-emitting diodes (LEDs). This work blazes a novel trail for the controllable preparation of multicolor fluorescent carbon dots.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Yanni Bi,Mimi Sun,Jingjuan Wang,Ziyu Zhu,Jing Bai,Mohammed Y. Emran,Ahmed Kotb,Xiangjie Bo,Ming Zhou
Fully integrated wearable sensors are capable of dynamically, directly, and independently tracking biomarkers in raw noninvasive biofluids without any other equipment or accessories by integrating the unique on-body monitoring feature with the special complete functional implementation attribute. Sweat, saliva, and urine are three important noninvasive biofluids, and changes in their biomarkers hold great potential for revealing physiological conditions. However, it is still a challenge to design single fully integrated wearable sensor arrays (FIWSAs) that are universally able to concurrently measure electrolytes and metabolites in three of the most common noninvasive biofluids including sweat, saliva, and urine. Here, we propose the first single universal FIWSAs for wirelessly, noninvasively, and simultaneously measuring various metabolites (i.e., uric acid) and electrolytes (i.e., Na+ and H+) in raw sweat, saliva, or urine under subjects’ exercise by integrating the specifically designed microfluidic, sensing, and electronic modules in a seamless manner. We evaluate its utility for noninvasive gout management in healthy subjects and in gout patients through a purine-rich meal challenge and with a medicine-treatment control, respectively. Noninvasive monitoring of multiple electrolytes and metabolites in a variety of raw noninvasive biofluids via such single universal FIWSAs may enrich the understanding of the biomarkers’ levels in the body and would also facilitate self-health management.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2023
·
IF 2
Zhengyu Wang,Yufeng Hu,Zhiduo Ding,Hao Zhou,Jianye Zhang,Jingjing Zhan,Minghuo Wu
For the identification of trace-level organic nitrogen compounds (NCs) in gasoline, a method consisting of water-assisted dispersive solid-phase extraction (DSPE) and high-performance liquid chromatography-high resolution mass spectrometry was developed in which mixed-mode cation exchange was used as the adsorbent. To increase the DSPE efficiency, water was dispersed into the gasoline to increase the pronation of NCs and enhance the ionic interaction with the adsorbent. After systematic optimization of DSPE conditions, including the adsorbent mass, sample volume, water to gasoline ratio, sample loading time, washing and elution solvents, sensitive determination of NCs (detection limits from 0.1 to 5 ng/L for the 14 analytes) was achieved by this method with a 100-fold enrichment. A number of unknown NC isomers were observed from the extracted ion chromatograms based on the accurate determination of mass-to-charge ratio (m/z), from which two sets of isomers at theoretical m/z of 122.09643 and 136.11208 were selected for identification. By careful elucidation of the product ion spectra of the selected ions, 16 NCs were putatively identified, in which six non-aniline homologs were reported for the first time.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·037511
·
IF 3.9
Qiang Zou,Xiaole Wang,Qi Su,Tao Xue,Kuibo Lan
PH sensors are widely used in food processing, health monitoring, water quality monitoring, and many other fields. The pH sensor applied in the health monitoring field can realize the real-time measurement of human health information and timely prevent the occurrence of diseases by improving people's health levels. However, these sensors have some challenges in body fluid collection and temperature compensation. Here, we developed a pH sensor based on an extended-gate field-effect transistor (EGFET) with microfluidic channels and a temperature sensor to overcome these challenges. The sensor is prepared using a low-cost, solution-based process in which a temperature sensor is used for body temperature measurement and temperature compensation, and a microfluidic channel is used for body fluid collection. This pH sensor can measure both body temperature and pH of body fluid, where the temperature coefficient of resistance (TCR) of the temperature sensor is up to 5.17%, and the measurement result of body temperature is only 0.17 ℃ different from that of the gold standard. The pH sensitivity is 58.41 mV pH−1, and the pH value is only 0.066 deviating from the standard pH value. The sensor is expected to be used on a large scale in the applications of wearable health monitoring.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jingxuan Yang,Dongxu Qu,Jue Wang,Yangtao Wu,Lingjun Bu,Yuanxi Huang,Shiqing Zhou
The N-Br bond in monobromoamine (NH 2 Br) can be cleaved by UV irradiation to generate Br • and subsequently HO • , resulting in an advanced oxidation condition (i.e., UV/NH 2 Br). This study investigated the degradation of six contaminants of emerging concern (CECs) in the UV/NH 2 Br process, including the phenolic hydrocarbons phenol and bisphenol A (BPA), the amines aniline and sulfadiazine (SDZ), and the persistent organic pollutants ibuprofen (IBP) and carbamazepine (CBZ). The results showed that UV/NH 2 Br process significantly improved the degradation of CECs following pseudo-first order kinetics, and the degradation of CECs was enhanced with the increase of NH 2 Br dosage. UV/NH 2 Br was more efficient in degrading CECs containing phenolic hydroxyl groups (100 %), followed by those containing amine groups (> 95 %). The degradation efficiency was influenced by the pH value and was highest at pH 7. It was found that low concentrations of Cl − (< 0.5 mM ) and HCO 3 − (< 0.5 mM) promoted the degradation of SDZ and IBP, but further increases in Cl − and HCO 3 − (0.5 ∼ 5.0 mM) resulted in inhibition. SDZ and IBP degradation was inhibited by photo absorption competition and free radical depletion in natural organic matter and actual water. Probe experiments showed that reactive bromine species (RBS), reactive nitrogen species (RNS), and hydroxyl radical (HO • ) played a dominant role in CEC degradation. During the degradation of IBP by UV/NH 2 Br, hydroxylation, bromination , and quinylation were proposed as the primary reaction mechanisms. As compared to HOCl disinfection, NH 2 Cl disinfection after the UV/NH 2 Br process produced lower concentrations of disinfection by-products (DBPs).
✓ 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）