JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2024
·
IF 2.4
Zhou Yicheng,Dong Li,Liu Lin,Liu Chao,Zhang Xiaobo,Tong Zhiwei
Based on the layered semiconductor material potassium tantalum titanate, a novel layered nanocomposite, C 3 F 7 –Azo + /TiTaO 5 , was successfully synthesized using the stripping/recombination method. The surfactant trans-[2 -(2,2,3,3,4,4,4-heptafluorobutylamino) ethyl]-{2-[4-(4-hexylbenzene-azo)-phenoxy] ethyl}—dimethylammonium, abbreviated as C 3 F 7 –Azo + Br − , served as the active center. The resulting composite was utilized to modify a glassy carbon electrode (GCE), forming the composite modified electrode C 3 F 7 –Azo + /TiTaO 5 /GCE, which was employed for the electrochemical detection of nitrite. During the experiment, X-ray diffractometry, transmission electron microscopy, and energy dispersive spectroscopy were used to characterize the morphology, structure, and elemental composition of the prepared materials. The electrochemical properties of the modified electrode were evaluated through cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. The results indicated that the composite electrode C 3 F 7 –Azo + /TiTaO 5 /GCE exhibited smaller electrochemical impedance (341.4 Ω) and a larger electrochemical active area (0.107 cm 2 ). It also displayed excellent sensitivity to nitrite, with a detection limit of 0.87 μM in the concentration range of 1.25–40.46 μM. Furthermore, the composite modified electrode C 3 F 7 –Azo + /TiTaO 5 /GCE demonstrated exceptional stability and anti-interference capability and effectively detected nitrite in real samples, such as river water, with recovery rates ranging from 97.83 to 99.12%. Graphical abstract
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR MEDICINE-JMM
·
2024
·
IF 4.8
Wang Pengtao,Tao Wei,Li Qiujie,Ma Wanting,Jia Wei,Kang Yuting
Indole-3-aldehyde (I3A) is an intestinal microbial metabolite that regulates inflammation in various inflammatory diseases; however, its role in chronic obstructive pulmonary disease (COPD) remains unclear. This study aimed to investigate the anti-inflammatory effects and molecular mechanisms of I3A in COPD. We constructed in vivo models using cigarette smoke (CS)-stimulated mice and in vitro models using cigarette smoke extract (CSE)-stimulated MH-S cells. The results demonstrated that I3A significantly alleviated bronchial obstruction in mice with COPD and reduced the expression of inflammatory factors such as TNF-α, IL-1β, and IL-6. Additionally, I3A decreased the levels of matrix metalloproteinases MMP2, MMP12, and inhibited the NF-κB p65/NLRP3 pathways. Further investigation revealed that I3A inhibited NF-κB activity by suppressing p65 phosphorylation and nuclear translocation in CSE-stimulated MH-S cells. The activation of the NF-κB and NLRP3 signaling pathways is mediated by histone deacetylase 5 (HDAC5) and HDAC6, both of which are inhibited by I3A. Subsequent experiments indicated that aryl hydrocarbon receptor (AHR) knockdown attenuated the inhibitory effect of I3A on pro-inflammatory cytokines and the HDACs/NF-κB/NLRP3 signaling pathways, highlighting the dependence of I3A's anti-inflammatory effects on the AHR receptor. Key messages
I3A effectively reduced lung inflammation in COPD mice by inhibiting the NF-κB pathway.
In CSE-stimulated MH-S cells, I3A suppressed p65 phosphorylation and nuclear translocation, thereby inhibiting NF-κB activity.
The activation of the NF-κB/NLRP3 pathways by HDAC5 and HDAC6 was diminished by I3A.
Through the activation of the AHR receptor, I3A suppressed the activities of HDAC5/6, leading to a decrease in inflammatory factor levels.
Graphical abstract
研究领域:
呼吸病学
·
免疫学
·
药理学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 410
·期 25
·6489-6495
·
IF 3.307
Wen Aoli,Peng Xiaoxiao,Zhang Pingping,Long Yunfei,Gong Huiming,Xie Qingru,Yue Ming,Chen Shu
Berberine hydrochloride (BHC), a natural isoquinoline alkaloid, is widely applied as a an agent in traditional Chinese medicine. Almost all the traditional methods for BHC detection require complicated preprocessing steps or expensive instruments. In this article, we report a simple, rapid, sensitive, and selective method for BHC detection using fluorescent gold nanoclusters (F-AuNCs) as the fluorescent probe with a large Stokes shift of 237 nm. The F-AuNCs prepared with citrate-stabilized stannous chloride and hydrogen tetrachloroaurate(III) as raw materials in an aqueous medium display strong and stable fluorescence at 566 nm. When F-AuNCs are mixed with BHC, the fluorescence of F-AuNCs is effectively quenched. Under optimized conditions, this method allows sensitive and selective measurements of BHC in a concentration ranging from 1.0 × 10 -6 to 1.0 × 10 -4 mol L -1 with a detection limit of 7.5 × 10 -8 mol L -1 , which is relatively low among reported spectral methods. This method provides excellent selectivity for the detection of BHC against inorganic anions and natural amino acids. In addition, the BHC content in two different types of berberine tablets was successfully determined by this method and the results showed high accuracy.
ᅟ
研究领域:
分析化学
·
药学
·
纳米科技
✓ 已验证
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-15
·
IF 16.419
Wu Xinyu,Tu Tingxiang,Dai Yang,Tang Pingping,Zhang Yu,Deng Zhiming,Li Lulu,Zhang Hao-Bin,Yu Zhong-Zhen
Highlights
3D printing of MXene frames with tunable electromagnetic interference shielding efficiency is demonstrated.
Highly conductive MXene frames are reinforced by cross-linking with aluminum ions.
Electromagnetic wave is visualized by electromagnetic-thermochromic MXene patterns.
Abstract The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference (EMI) shielding materials to assure the normal operation of their closely assembled components. However, the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding efficiency. Herein, we demonstrate the direct ink writing of robust and highly conductive Ti 3 C 2 T x MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism applications. The as-printed frames are reinforced by immersing in AlCl 3 /HCl solution to remove the electrically insulating AlOOH nanoparticles, as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum ions. After freeze-drying, the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25–80 dB with the highest electrical conductivity of 5323 S m −1 . Furthermore, an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern, and its color can be changed from blue to red under the high-intensity electromagnetic irradiation. This work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-15
·
IF 14.919
Xiong Pan,Zhang Fan,Zhang Xiuyun,Liu Yifan,Wu Yunyan,Wang Shijian,Safaei Javad,Sun Bing,Ma Renzhi,Liu Zongwen,Bando Yoshio,Sasaki Takayoshi,Wang Xin,Zhu Junwu,Wang Guoxiu
The regulation of anions and cations at the atomic scale is of great significance in membrane-based separation technologies. Ionic transport regulation techniques could also play a crucial role in developing high-performance alkali metal batteries such as alkali metal-sulfur and alkali metal-selenium batteries, which suffer from the non-uniform transport of alkali metal ions (e.g., Li + or Na + ) and detrimental shuttling effect of polysulfide/polyselenide anions. These drawbacks could cause unfavourable growth of alkali metal depositions at the metal electrode and irreversible consumption of cathode active materials, leading to capacity decay and short cycling life. Herein, we propose the use of a polypropylene separator coated with negatively charged Ti 0.87 O 2 nanosheets with Ti atomic vacancies to tackle these issues. In particular, we demonstrate that the electrostatic interactions between the negatively charged Ti 0.87 O 2 nanosheets and polysulfide/polyselenide anions reduce the shuttling effect. Moreover, the Ti 0.87 O 2 -coated separator regulates the migration of alkali ions ensuring a homogeneous ion flux and the Ti vacancies, acting as sub-nanometric pores, promote fast alkali-ion diffusion.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2016
·Vol. 227
·期 8
·1-9
·
IF 1.551
Yu Yanghai,Zhou Shiqing,Bu Lingjun,Shi Zhou,Zhu Shumin
An electrochemically activated persulfate (EC/PS) system was proposed for the degradation of herbicide diuron in this study. In the EC/PS system, the ferrous ions (Fe 2+ ) produced from iron electrode can activate persulfate to generate sulfate radical (SO 4
·- ) as well as hydroxyl radical (OH • ). The results showed that the degradation of diuron was significantly enhanced in the EC/PS system, compared to electrocoagulation, persulfate, and Fe 2+ /PS process. Both of SO 4
·- and OH · contributed to the degradation of diuron in the EC/PS system according to the radical scavenging studies. The pseudo first-order rate constants of diuron increased with increasing the applied currents and dosages of persulfate. pH affected the degradation of diuron indirectly through the speciation of iron and resulted in higher removal efficiency in acidic condition than in alkaline condition. Chloride, carbonate, and bicarbonate in real water inhibited the degradation of diuron dramatically through consuming SO 4
·- and OH · and abided by the order of CO 3
2− >HCO 3
− >Cl − . This study demonstrates that the EC/PS system is a novel, efficient, promising, and environmental-friendly method to treat diuron contamination.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Nature Electronics
·
2024
·
IF 33.7
Liu Dingyao,Tian Xinyu,Bai Jing,Wang Shaocong,Dai Shilei,Wang Yan,Wang Zhongrui,Zhang Shiming
Organic electrochemical transistors could be used in in-sensor computing and wearable healthcare applications. However, they lack the conformity and stretchability needed to minimize mechanical mismatch between the devices and human body, are challenging to fabricate at a scale with small feature sizes and high density, and require miniaturized readout systems for practical on-body applications. Here we report a wearable in-sensor computing platform based on stretchable organic electrochemical transistor arrays. The platform offers more than 50% stretchability by using an adhesive supramolecular buffer layer during fabrication that improves robustness at interfaces under strain. We fabricate stretchable transistor arrays with feature sizes down to 100 μm using a high-resolution six-channel inkjet printing system. We also develop a coin-sized data readout system for biosignal acquisition. We show that our coin-sized, smartwatch-compatible electronic module can provide wearable in-sensor edge computing.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2024
·Vol. 18
·期 3
·1-12
·
IF 2.5
Wang Wenshuang,Pan Xingya,Zhang Xinxin,Wang Minglin,Wang Zijia,Feng Lingzhi,Wang Xiaolei,Zhao Kongyin
Combining molecular imprinting technique with titanium dioxide (TiO 2 ) photocatalysis technique can improve the degradation ability and selectivity of TiO 2 nanoparticles towards pollutants. In this work, methyl orange-imprinted polysiloxane particles (MIPs) were synthesized using TiO 2 as matrix and silane as functional monomers. The adsorption capacity ( Q e ) of MIPs was 20.48 mg·g −1 , while the imprinting efficiency (IE) was 3.4. Such MIPs exhibited stable imprinting efficiencies and adsorption efficiencies towards methyl orange (MO) in the multi-cycle stability test. Photocatalytic degradation performances of both MIPs and non-imprinted polysiloxane particles (NIPs) were investigated. Compared with NIPs, MIPs exhibited better photocatalytic degradation performance towards MO, with the degradation efficiency of 98.8% in 12 min and the apparent rate constant ( K obs ) of 0.077 min −1 . The interaction between silane and MO was also studied through molecular dynamics simulation. This work provides new insights into the use of silane for the synthesis of MIPs as well as the molecular imprinting technique for applications in the field of TiO 2 photocatalysis.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 5
·894-900
·
IF 3.1
Zhou Hongtao,Xu Beihang,Zheng Xinjia,Gong Jinchao,Zhang Kaitong,He Yonglin
Sensing materials possessing intrinsic color perception are indispensable prerequisites for the development of filterless photosensors, which could eliminate the need for complex device designs and avoid color distortion in post-processing. Traditional materials are constrained by complex processing methods and limited stability. Herein, a color-photosensitive array based on ionic liquid with selective photothermal conversion (ILSPC) has been developed for intrinsic color perception. Relying on the selective absorption, photothermal conversion, and thermosensitivity of ILSPC, a photo-thermo-electric sensing system has been constructed. Besides, the versatility of the two algorithms has been validated in color reconstruction and electrical signal prediction. As an exploration, the photosensitive array showcases promising color recognition capabilities, potentially propelling the evolution of flexible photosensors.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
BIOTECHNOLOGY LETTERS
·
2024
·
IF 2
Zhao Shuo,Zeng Yu,Li Ying,Wang Zhen,Chen Li,Chen Kequan
This investigation probes the role of the electron mediator, neutral red (NR), in the electrosynthesis process, specifically examining its effect on the production of succinic acid by Actinobacillus succinogenes . Our findings reveal that NR, when integrated into the cell membrane, is pivotal for sustaining MEC efficiency. Nevertheless, it is susceptible to both intrinsic and MECs-induced degradation. Notably, during the exponential growth phase of the bacteria, NR is readily incorporated into the cell membrane. However, the supplemental addition of NR fails to significantly enhance the MEC’s capacity for succinic acid synthesis, no matter what stage of bacterial growth. And significant depletion of membrane-associated NR is not adequately compensated by the NR present in the fermentation liquid. The ORP feedback-regulated MECs adeptly conserve the NR on the cell membrane, which is essential for maintaining the efficiency of long-term electrosynthesis. The presence of NR on the cell membrane is essential for the functionality of MECs, yet its external replenishment hard. Implementing precise electro-potential regulation strategies can effectively diminish the degradation of NR, thus maintaining the system’s efficiency.
研究领域:
微生物学
·
电化学工程
·
生物技术
✓ 已验证
DOI
PubMed
高影响因子
Bioresources and Bioprocessing
·
2024
·Vol. 11
·期 1
·1-14
·
IF 4.3
Chen Ming,She Weina,Zhao Xin,Chen Cheng,Zhu Benwei,Sun Yun,Yao Zhong
The Thermomyces lanuginosus lipase (TLLs) was successfully immobilized within a novel hydrogel matrix through a two-step crosslinking method. TLLs were initially crosslinked through the Schiff base reaction by oxidized carboxymethyl cellulose (OCMC). The water-soluble OCMC@TLLs complex was subsequently crosslinked by carboxymethyl chitosan (CMCSH) in a microfluidic apparatus to form the CMCHS/OCMC@TLLs microspheres. The CD (Circular Dichroism, CD) and FT-IR (Fourier Transform infrared spectroscopy, FT-IR) spectra demonstrated that the crosslinking of TLLs with OCMC resulted in a less significant impact on their structure compared to that with glutaraldehyde. CMCHS/OCMC@TLLs showed decreased catalytic performance due to the mass transfer resistance, while its thermal stability was greatly improved. The CMCHS/OCMC@TLLs were used to catalyze the lauroylation of arbutin in tetrahydrofuran. After 12 h of reaction under optimal conditions, the yield of 6′-O-lauryl arbutin reached an impressive 92.12%. The prepared 6′-O-lauryl arbutin has high lipophilicity and exhibits similar tyrosinase inhibitory activity and higher antioxidant activity compared to its parent compound.
研究领域:
生物化学
·
酶工程
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 88
·期 1
·227-235
·
IF 1.745
Gao Qiuyue,Jin Yani,Jin Yiming,Wang Xiaoqing,Ye Ziran,Hong Zhanglian,Zhi Mingjia
Abstract This work reported the preparation of amorphous MoS x aerogel and MoS x /carbon nanotubes composite aerogels by a modified epoxide addition sol–gel method. In this process, propylene epoxide scavenged the protons from a S–H-contained organic acid ( dl -Mercaptosuccinic acid) and promoted the interactions between (NH 4 ) 6 Mo 7 O 24 •4H 2 O and the functional groups in the organic acid to form a gel. The sulfur and molybdenum contained a wet gel turned into an amorphous MoS x aerogel after supercritical drying in ethanol. Carbon nanotubes can be further incorporated into the aerogel backbone, which can extend the specific surface area and alter the pore structures in the composite aerogels. Such composite aerogels showed good catalytic performance in electrochemical hydrogen evolution reactions.
MoS x aerogels can be prepared by the modified epoxide-adding method and showed good catalytic activity toward HER.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）