SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Dechan Lu,Rongyuan Cai,Yuqin Liao,Ruiyun You,Yudong Lu
Abnormal uric acid (UA) content in body fluids can fully reflect the status of metabolism and immunity in the body. We have developed a simple, efficient and label-free surface enhanced Raman scattering (SERS) method for UA detection. Briefly, p-aminothiophenol (p-ATP) was used as the internal standard molecule and linking molecule to prepare a glass/p-ATP/Ag NPs SERS substrate. The Raman characteristic peak of p-ATP at 1076 cm −1 can be used as an internal standard molecule to correct the signal fluctuation of UA detection. The results show that the SERS method owns a linear response with a ranging from 5 × 10 -6 to 10 -3 M of UA characteristic peak of both 693 cm −1 and 493 cm −1 with a determination coefficient (R 2 ) of 0.9878 and 0.9649, respectively. Additionally, the SERS sensor has been further used for the analysis of UA in sweat and good recoveries were obtained for the sensing of sweat. We believe that the developed SERS substrate has potential for applications in healthcare monitoring.
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PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 37
·2301085
·
IF 13.3
Guo Liu,Qi Zeng,Xinyi Sui,Shuhao Tian,Xiao Sun,Qingfeng Wu,Xijuan Li,Yuhao Zhang,Kun Tao,Erqing Xie,Zhenxing Zhang
Polysulfide shuttle effect and sluggish sulfur reaction kinetics severely impede the cycling stability and sulfur utilization of lithium-sulfur (Li-S) batteries. Modulating d-band electronic structures of molybdenum disulfide electrocatalysts via p/n doping is promising to boost polysulfide conversion and suppress polysulfide migration in lithium-sulfur batteries. Herein, p-type V-doped MoS 2 (V-MoS 2 ) and n-type Mn-doped MoS 2 (Mn-MoS 2 ) catalysts are well-designed. Experimental results and theoretical analyses reveal that both of them significantly increase the binding energy of polysulfides on the catalysts’ surface and accelerate the sluggish conversion kinetics of sulfur species. Particularly, the p-type V-MoS 2 catalyst exhibits a more obvious bidirectional catalytic effect. Electronic structure analysis further demonstrates that the superior anchoring and electrocatalytic activities are originated from the upward shift of the d-band center and the optimized electronic structure induced by duplex metal coupling. As a result, the Li-S batteries with V-MoS 2 modified separator exhibit a high initial capacity of 1607.2 mAh g −1 at 0.2 C and excellent rate and cycling performance. Moreover, even at a high sulfur loading of 6.84 mg cm −2 , a favorable initial areal capacity of 8.98 mAh cm −2 is achieved at 0.1 C. This work may bring widespread attention to atomic engineering in catalyst design for high-performance Li-S batteries.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 5
·1-15
·
IF 2.8
Bai Xiaodong,Li Ke,Hu Hua,Yan Yancheng,Luo Yumei
A new anionic polymer poly(acrylamide-co-N-vinylpyrrolidone-co-sodium p-styrene sulfonate) (abbreviated as PANS) is synthesized by using acrylamide(AM), N-vinylpyrrolidone(NVP) and sodium p-styrene sulfonate(SSS) as monomers and used as filter loss agents. The optimal synthesis process conditions are explored by orthogonal experiments: molar ratio is AM:NVP:SSS = 3.5; 2; 1, the monomer concentration is 35 wt%, the initiator concentration is 0.40 wt%, the reaction temperature is 45 °C, and the reaction time is 4 h. Fourier infrared spectroscopy(FTIR)and nuclear magnetic resonance hydrogen spectroscopy( 1 HNMR) hydrogen spectroscopy are used to characterize it. Through thermogravimetric analysis(TG) testing, its temperature resistance is tested, and it is found that it has good thermal stability before 350 °C. The performance test is carried out using American Petroleum Institute(API) evaluation criteria, and it is found that the filter loss before aging is 7.5 mL under 2 wt% addition, and only 8 mL after aging. At the same time, after the addition of PANS, the salt resistance of drilling fluid after high temperature aging is improved, and the filtration loss after aging is only 8.25 mL under the addition of 12 wt% NaCl, while the filtration loss after aging is 8.2 mL under the addition of CaCl 2 at 3 wt%. Through Zeta potential and particle size analysis, after adding PANS, the particle size of clay particles can be greatly reduced after aging, and the zeta potential value of drilling fluid is optimized under calcium salt contamination.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Zhenxing Cai,Pingxin Li,Hui Zhao,Lingyan Wang,Xiaobo Chen,Chaohe Yang
The solubility of cyclohexanone, tert-butanol, and 1,4-dioxane in p-, o-, and m-xylenes and ethylbenzene was measured by a gas chromatography method under an atmospheric environment. The measured data indicated that the solubility of cyclohexanone, tert-butanol, and 1,4-dioxane in the xylenes and ethylbenzene increases with increasing temperature. The experimentally determined solubility results were fitted with the modified Apelblat equation, Van’t Hoff equation, and Wilson model. Among them, the Wilson model was most consistent with the measured solubility results. The dissolution-related thermodynamic properties of cyclohexanone, tert-butanol, and 1,4-dioxane in xylenes and ethylbenzene, including the changes of molar Gibbs free energy, molar enthalpy, and molar entropy, were predicted and analyzed via the correlated Wilson model, which indicates that the dissolution behaviors are spontaneous and endothermic process. The obtained solubility results provide the thermodynamic foundation for the development and upgrading of industrial separation processes related to xylene, ethylbenzene, cyclohexanone, tert-butanol, and 1,4-dioxane.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Huiwen Wang,Sihao Wu,Zoujun Peng,Xiulin Wang,Juanhua Lai,Ping Qiu
The quantitative analysis of glyphosate has significant implications for the evaluation of food quality and environmental safety risks. First, copper nanoparticles (Cu NPs) were synthesized using cetyltrimethylammonium bromide (CTAB) as a stabilizing agent, which resolved the limitation associated with atmospheric oxidation of Cu NPs and provided excellent fluorescence stability. Interestingly, the fluorescence of blue-emitting CTAB-Cu NPs was quenched by pH-responsive p-nitrophenol (p-NP) via Förster resonance energy transfer. Herein, a dual read-out sensor based on CTAB-Cu NPs and p-NP was constructed for glyphosate detection. Specifically, acetic acid (HAc) from acetylcholine (ACh) via hydrolysis catalyzed by acetyl cholinesterase (AChE) reduced the pH of the mixed solution and prevented the loss of protons from p-NP, which allowed the fluorescence emission by CTAB-Cu NPs. The presence of glyphosate inhibited the activity of AChE, and the increased pH resulted in proton loss. The fluorescence intensity of CTAB-Cu NPs was quenched, and the solution color changed from colorless to yellow with a UV absorption peak at 400 nm. The sensor can detect ultra-trace levels of glyphosate residues with a limit of detection of 5.43 ng/L. The obtained biosensor was successfully utilized to monitor the degradation of glyphosate in the roots of cabbage and cultivated soil.
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高影响因子
POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 7
·664-670
·
IF 3.2
Bin Li,Mengjing Zhou,Xiaojia Xu,Jizhen Liu,Wenrui Hao,Aolin Wu
Choline chloride, acrylamide (AM) and acrylic acid (AA) were used as raw materials to prepare deep eutectic solvent, and β-cyclodextrin (β-CD) was used as filler to prepare β-CD/P(AM- co -AA) composite hydrogel by frontal polymerization. The composite hydrogel was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The pH response, mechanical properties and self-healing of the hydrogel were studied. The results show that AA contains easily ionized –COOH, which makes the composite hydrogel have excellent pH response and super-high swelling ratio under alkaline conditions. With the addition of β-CD, due to the increase of hydrogen bonds and the combination of β-CD and polymer chains the mechanical properties of the hydrogel are obviously improved and the tensile strength and compressive strength are increased by 4.12 and 2.26 times respectively. The introduction of β-CD can improve the self-healing performance of the composite hydrogel. With the increase of β-CD content, the healing rate and healing speed of the composite hydrogel show an upward trend. In this study, a simpler and faster method is proposed to prepare self-healing composite hydrogel with excellent mechanical properties and pH responsiveness. The self-healing property and the existence of a hydrophobic cavity of β-CD make β-CD/P(AM- co -AA) composite hydrogel have potential application in wound healing. © 2023 Society of Industrial Chemistry.
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xiaoyu Zhong,Linyang Li,Wenhao Xiang,Chuanbao Xiao,Nianbing Zhong,Quanhua Xie,Dengjie Zhong,Yunlan Xu,Haixing Chang,Shih-Hsin Ho
Herein, a highly stable and efficient photoelectrocatalytic system was developed for the rapid degradation of tetracycline . The photoelectrocatalytic system comprised two Ag/N-doped TiO 2 nanotube photoanodes, a bipolar membrane, and a P–Pd cathode. The Ag/N-doped TiO 2 nanotube photoanodes were coupled with a P–Pd cathode to enhance the hydroxyl free radical (·OH) generation at the cathode surface. The bipolar membrane can separate tetracycline pollutants and degradation products from the photoanodes, which can minimize the contamination of the photocatalyst by tetracycline or products, thereby enhancing the repeatability and stability of the photoelectrocatalytic system. photoelectrocatalytic uses ultraviolet–visible light as the input energy for the effective removal of tetracycline and total organic carbon . The initial pH in the cathode and photoanode chambers was 7.0. The Na 2 SO 4 concentration in the photoanode chamber and the addition amount of H 2 O 2 were 0.2 M and 4% (v/v), respectively. Under these conditions, 100 mL of 100 mg/L tetracycline was completely degraded within 60 min, and 82.3% total organic carbon was removed within 5 h. The pseudo-first-order reaction rate constant of the Ag/N-doped TiO 2 nanotube with 0.15 M Ag was 0.0637 min-1, which was 12 times higher than that of N-doped TiO 2 nanotube. The mechanisms underlying·OH generation and the tetracycline degradation pathway were also elucidated. The photoelectrocatalytic system, which is an eco-friendly and low-energy system, exhibits excellent stability and reliability toward tetracycline and total organic carbon degradation and significantly aids the development of wastewater remediation.
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高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Ying Wang,Chuanjiang Jian,Yiqing Long,Xiaowen Xu,Yang Song,Zongning Yin
Pathological coagulation within an injured artery and the subsequent cardiovascular complications, such as stroke and heart attack, greatly threaten human life. Inspired by the biochemical features of acute arterial thrombosis, such as abundant activated platelets and hydrogen peroxide (H 2 O 2 ), we constructed platelet-targeted theranostic nanoparticles (CyBA/PFM NPs) with H 2 O 2 -triggered photoacoustic contrast enhancement and antithrombotic capabilities. CyBA/PFM NPs were designed to target platelet-rich clots via fucoidan segment within the carrier, which could be activated by H 2 O 2 to produce fluorescent “CyOH” molecules, thus turning on the photoacoustic signal. CyBA/PFM NPs showed obvious amplification of fluorescence following incubation with fresh clots, exhibiting efficient scavenging ability of intracellular reactive oxygen species (ROS). In a FeCl 3 -induced mouse model of carotid thrombosis, CyBA/PFM NPs significantly amplified the photoacoustic contrast in thrombogenic tissues, effectively eliminated ROS within the occlusion site, and suppressed the thrombus formation , accompanied by a normalization of the soluble CD40L level. Given their accurate imaging potential, potent antithrombotic activities and acceptable biosafety, CyBA/PFM NPs hold strong potential as nanoscale theranostics for H 2 O 2 -correlated cardiovascular diseases. Statement of significance In this study, we developed a platelet-targeted and H 2 O 2 -triggered nanosystem self-assembled from phenylboronated fucoidan/maltodextrin polymers and responsive near-infrared probes. The fucoidan segment within the carrier could facilitate the specific delivery of the therapeutic polymers and probes to the platelet-rich arterial thrombus. In a mouse model of FeCl 3 -induced arterial thrombosis, the system could be activated by H 2 O 2 to produce fluorescent “CyOH” molecules, thus turning on the photoacoustic signal and specifically imaging thrombosed tissues. Besides, CyBA/PFM NPs significantly effectively eliminated ROS within the occlusion site and suppressed the thrombus formation. Given their theranostic potential and acceptable biosafety, this system has great potential for H 2 O 2 -correlated cardiovascular diseases.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Fangmin Wu,Jun Nan,Tianzuo Wang,Zhencheng Ge,Bohan Liu,Meng Chen,Xuesong Ye
The activity and selectivity of the cathode towards electrosynthesis of H 2 O 2 are critical for electro-Fenton process. Herein, nickel-foam modified with N, O co-doped graphite nanosheets (NO-GNSs/Ni-F) was developed as a cathode for highly efficient and selective electrosynthesis of H 2 O 2 . Expectedly, the accumulation of H 2 O 2 at pH= 3 reached 494.2 mg L −1 h −1 , with the selectivity toward H 2 O 2 generation reaching 93.0%. The synergistic effect of different oxygen-containing functional groups and N species on the performance and selectivity of H 2 O 2 electrosynthesis was investigated by density functional theory calculations, and the combination of epoxy and graphitic N (EP + N) was identified as the most favorable configuration with the lowest theoretical overpotential for H 2 O 2 generation. Moreover, NO-GNSs/Ni-F was applied in the electro-Fenton process for p-nitrophenol degradation, resulting in 100% removal within 15 min with the kinetic rate constant of 0.446 min −1 and 97.6% mineralization within 6 h. The efficient removal was mainly attributed to the generation of bulk ·OH. Furthermore, NO-GNSs/Ni-F exhibited excellent stability. This work provides a workable option for the enhancement of H 2 O 2 accumulation and the efficient degradation of pollutants in electro-Fenton system.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xuecheng Liu,Linjie Yan,Xiting Hu,Hongli Feng,Bingke Guo,Xia Ha,Hui Xu
A facile construction of B and P doped carbon nitride as a potential photo-catalyst for splitting water to generate hydrogen or oxygen and BPA removal under visible light. B and P doping are confirmed by a series of characterizations. As the symmetrical π-conjugated rings of g-C 3 N 4 could be destroyed by B and P doping to enhance the visible-light absorbance and n → π∗ electronic transition to provide a new pathway for the directional separation of photoexcited electrons to boost the photocatalytic activity. Significantly, the CN-BP catalyst demonstrates excellent H 2 and O 2 evolution rates of 4.0 mmol H2 h −1 g −1 and 0.3 mmol O2 h −1 g −1 under visible light, which is about ∼3.8 and 21.6 times higher than that of g-C 3 N 4 , respectively. Notably, without sacrificial agent , the CN-BP could remove BPA completely by oxidation to generate 30 μmol h −1 g −1 H 2 . Both DFT calculations and characteristic results reveal that B and P doped carbon nitride reduce band gap energy , improve light harvesting and separation rate of electron-holes carriers for upgrading the photocatalytic activity.
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高影响因子
Advanced Materials Interfaces
·
2023
·Vol. 10
·期 9
·2202488
·
IF 5.4
Shihao Fu,Renjing Song,YueFei Wang,Yurui Han,Chong Gao,Jiangang Ma,Haiyang Xu,Bingsheng Li,Aidong Shen,Yichun Liu
Deep ultraviolet monitoring is realized via a high crystal quality SnO 2 microwire (MW)-based photodetector (PD). This is then combined with 2D nitrogen-doped graphene (NGr), conducting polymer polypyrrole (PPy), and an in situ polymerization-fabricated composite film PPy-NGr to construct an organic–inorganic p–n heterojunction PD. The long response time brought on by the oxygen adsorption of SnO 2 MW is greatly decreased via coating with the aforementioned materials. A defect response is created by the surface dangling bonds of SnO 2 MW, which can be effectively suppressed by the PPy. Absorption in the deep ultraviolet region (<240 nm) by PPy results in a blue shift of the response peak of the PPy/SnO 2 heterojunction PD compared to that of a single SnO 2 PD. The introduction of NGr improves the detection performance by providing a smoother energy band migration to reduce photogenerated carrier recombination and stacking at the potential barrier. The ultrahigh responsivity of PPy-NGr/SnO 2 PD is 4594.25 A W −1 and the detectivity is 6.47 × 10 11 Jones, 40 and nine times greater, respectively, than those of a PPy/SnO 2 PD under a 5 V reverse bias and 240-nm light irradiation (18.75 µW cm −2 ). The novel strategy provides a reference for the future design of high-performance heterojunction PDs.
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高影响因子
POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 5
·520-531
·
IF 3.2
Yaqing Wen,Chunshan Lu,Guofei Chen,Xingzhong Fang
Two series of poly(ester-amide-imide)s (PEsAIs) with simultaneously bulky side groups, ester and amide bonds were synthesized by copolymerization of tert -butylhydroquinone bis(trimellitate anhydride), p -phthaloyl chloride and other monomers. These PEsAIs had glass transition temperatures ( T g s) in the range of 231–301 °C, coefficients of thermal expansion (CTEs) of 17–59 ppm K −1 and displayed good mechanical properties with tensile modulus of 2.6–4.5 GPa, tensile strengths of 63–143 MPa and elongations at break of 3.0%–11.7%. All films had good transparency with transmittances at 400 nm ( T 400nm ) of 43%–80%. The introduction of p -phthaloyl chloride successfully improved the properties of the polymer with higher transmittance, higher T g and lower CTE. In particular, PEsAI-b-60 presented the best comprehensive performance with a moderate T g of 301 °C, low CTE of 17 ppm K −1 and high transmittance ( T 400nm ) of 75%. © 2023 Society of Industrial Chemistry.
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危险品化学品经营许可证（带存储）