JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Qi Wang,Shaopeng Fu,Xingyao Yang,Qinghao Sun,Junwei Zhang,Yichun Peng,Rongling Zhang,Zezhou Liang,Jianfeng Li
An organic nitrogen/oxygen-rich polymer (PFN-NDIN) was prepared via Suzuki reaction between 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-bis(3-N,N- dimethylaminopropyl)-9H-fluorene (FNB) and 4,9-dibromo-2,7-bis(3-(dimethyl-amino)propyl)naphthalenediimide (NDINBr 2 ) and utilized as a new inhibitor for HRB400 steels corrosion in alkaline medium of simulated concrete pore solution. The inhibition efficiency of this inhibitor was evaluated by electrochemical techniques. The electrochemical impedance spectroscopy (EIS) results showed that the protective capacity of PFN-NDIN on HRB400 steel increased with increasing concentration to attain 92.85% efficacy with 400 ppm at 288 K. Potentiodynamic polarization (PDP) plots indicated that PFN-NDIN is effective and acts as a hybrid inhibitor. The adsorption behavior of PFN-NDIN was fitted and found to follow the Langmuir isothermal adsorption line, with discussion of the relevant thermodynamic parameters. The effect of temperature on this inhibitor's the rust-inhibiting effect was investigated. The surface was then studied, showing that the interfacial corrosion of HRB400 steel was inhibited by PFN-NDIN molecules. The relationship between PFN-NDIN molecules’ structure and the inhibition efficiency was investigated by quantum chemical calculations. Several parameters were calculated, the findings revealed that the prepared materials correlated well with their electronic contribution capability.
研究领域:
材料腐蚀与防护
·
高分子化学
·
电化学
·
建筑材料科学
·
表面科学
·
量子化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 31
·16168-16176
·
IF 7.443
Hao Wang,Fengxiang Yin,Biaohua Chen,Guoru Li
An ε-MnO2/metal–organic-framework (Fe) (i.e., ε-MnO2/MOF(Fe)) composite was synthesised by integrating ε-MnO2 and a MOF(Fe) support. The composite was characterised using X-ray diffraction, N2 adsorption–desorption, field emission scanning electron microscopy, transmission electron microscopy, elemental mapping, Fourier transform infrared spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The ORR activity of the composite was evaluated by cyclic and linear sweep voltammetries in an alkaline electrolyte. The results revealed that in the ε-MnO2/MOF(Fe) composite, ε-MnO2 is in the form of nanorods, each with one end protruding and the other firmly anchored on the MOF(Fe) matrix with a high porosity and a high specific surface area. This unique structure of the composite is advantageous for oxygen diffusion and contact with ε-MnO2 during reactions, resulting in much better ORR activity and stability than those of ε-MnO2 in an alkaline electrolyte. The ε-MnO2/MOF(Fe)-catalysed ORR favours an apparent 4-electron transfer pathway in which oxygen was first reduced to hydroperoxide, which was further chemically decomposed into primarily OH− and O2.
研究领域:
材料化学
·
电化学
·
纳米催化
·
能源材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Weitao Yang,Xiudong Shi,Yuxin Shi,Defan Yao,Shizhen Chen,Xin Zhou,Bingbo Zhang
Protein-assisted biomimetic synthesis has been an emerging offshoot of nanofabrication in recent years owing to its features of green chemistry, facile process, and ease of multi-integration. As a result, many proteins have been used for biomimetic synthesis of varying kinds of nanostructures. Although the efforts on exploring new proteins and investigating their roles in biomimetic chemistry are increasing, the most essential intrinsic properties of proteins are largely neglected. Herein we report a frequently used enzyme (horseradish peroxidase, HRP) to demonstrate the possibility of enzymatic activity retaining after accomplishing the roles in biomimetic synthesis of ultrasmall gadolinium (Gd) nanodots and stowing its substrate 2,2′-Azinobis (3-ethylbenzothiazoline-6-sulfonic acid ammonium salt) (ABTS), denoted as Gd@HRPABTS. It was found that ca. 70% of the enzymatic activity of HRP was preserved. The associated changes of protein structure with chemical treatments were studied by spectroscopic analysis. Leveraging on the highly retained catalytic activity, Gd@HRPABTS exerts strong catalytic oxidation of peroxidase substrate ABTS into photoactive counterparts in the presence of intrinsic H2O2 inside the tumor, therefore enabling tumor-selective catalytic photoacoustic (PA) imaging and photothermal therapy (PTT). In addition, the MR moiety of Gd@HRPABTS provides guidance for PTT and further diagrams that Gd@HRPABTS is clearable from the body via kidneys. Preliminary toxicity studies show no observed adverse effects by administration of them. This study demonstrates beyond the well-known roles in biomimetic chemistry that HRP can also preserve its enzymatic activity for tumor catalytic theranostics.
研究领域:
纳米技术
·
生物医学工程
·
癌症研究
·
材料科学
·
化学生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Xian Zhou,Wenjing Cheng,Fudan Zhu,Cunli Wang,Fengchun Yang,Weidong Kang,Xin Zhang
As an herbicide, oryzalin (ORZ) is extensively used to control the growth of weeds, whereas excessive ORZ is harmful to human beings. Therefore, it is imperative for its quantitative detection. However, numerous efforts have been focused on noble-metal materials in electrochemical sensing, increasing the application cost. In this study, CoMoS/O-MWNTs hybrid with wrinkled nanosheets , as a non-noble metal electrocatalyst , is successfully synthesized by hydrothermal method . The CoMoS/O-MWNTs is cost-effective and has the elevated stability and catalytical activity, which can be attributed to the combination between CoMoS and O-MWNTs through O element strengthens strong coupling interaction of Co Mo. The platform possesses the wide linear detecting range of 0.48–22 μM and 22–85 μM, which is wider than previous reports. Thus, the excellent electrochemical property demonstrates CoMoS/O-MWNTs is an effective electrocatalyst for the reduction of ORZ.
研究领域:
电化学
·
纳米材料
·
环境监测
·
传感器技术
·
农业化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 9
·6803-6809
·
IF 3.201
Qimeng Yang,Shiyu Lu,Bolei Shen,Shujuan Bao,Yingshuai Liu
A colorimetric assay for H2O2 that is based on the use of iron hydroxyl phosphate (Fe3(PO4)2(OH)2) microoctahedrons, which are shown to be efficient peroxidase mimics, has been described. The microoctahedrons were prepared via a one-pot hydrothermal method. They catalyze H2O2 reduction and 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation to produce a blue product whose color can be observed visually and measured using spectrophotometry, best at 652 nm. The method was applied for the quantification of H2O2 with a limit of detection (LOD) of 0.17 μM. The scope of the method was further extended to the determination of glucose by using the enzyme glucose oxidase which catalyzes glucose oxidation to produce gluconic acid and H2O2 which was quantified as described above. The response is linear in the 5–100 μM glucose range, and the LOD is 1.2 μM. This work not only reports a new kind of peroxidase mimic, but also develops a simple, robust and sensitive colorimetric sensing platform for H2O2 and glucose detection in biomedicine and food industry.
研究领域:
生物化学
·
医学检测
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Nana He,Lili Li,Jiaqi Chen,Junhao Zhang,Ce Liang
Extraordinary superhydrophobic polycaprolactone (PCL) composite membranes with an alternated hierarchical micro–nano structure were designed by addition of SiO2 aerogel. The highest water contact angle (WCA) of 166.8 ± 1.5° was obtained when SiO2 aerogel content was 0.5% (PCL/SiO2-a0.5) in the PCL composite membrane, which was higher than other reported polymer-based membranes. SiO2 aerogel lowered PCL composite membrane’s surface energy. The triple curvature structure composed of microspheres, nanospheres, and nanofibers produced on PCL/SiO2-a0.5 membranes endowed the excellent roughness of the surface. Also, the inner structure of the PCL/SiO2-a0.5 composite membrane composed of micro–nano spheres, nanofibers, and microfibers increased the porosity of the separation membrane, which would provide more adsorption space. The PCL/SiO2-a0.5 composite membrane as a separator for surfactant-stabilized emulsions of water-in-oil showed ultrahigh separation flux and efficiency. Meanwhile, the PCL/SiO2-a0.5 composite membrane had an outstanding chemical resistance, self-cleaning ability, and good reusability. The composite membranes reported in this work as eco-friendly separation materials possessed all these characters in oil/water separation. This research proposed a very simple method to design eco-friendly high-efficiency separators through the construction of the alternated micro–nano hierarchical structure.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 36
·5387-5394
·
IF 3.304
Haiyue Peng,Xiaojian Yang,Yuanyuan Ma,Jianing Liu,Yonghui Wang,Huaqiao Tan,Yangguang Li
The development of highly active and stable electrocatalysts for HER has been received extensive attention. Among these, minimizing the Pt usage and promoting its utilization efficiency are essential prerequisites for a future hydrogen economy. Herein, we use a new ε-Keggin-type polyoxometalate-based metal–organic framework H3[Zn4(bimb)2][PMoV8MoVI4O40]·12H2O (POMOF-1) as a support to load a low amount of ultrasmall Pt nanoparticles (NPs), and then mix this material with Ketjenblack carbon (KB) to form a new composite catalyst (Pt@POMOF-1/KB). This composite catalyst shows a low Pt loading amount of 0.43 wt% and the average size of the Pt NPs is 1.5 nm. Pt@POMOF-1/KB exhibits a remarkable HER performance in 0.5 M H2SO4. It only requires an overpotential to of 23 mV to observe a current density of 10 mA cm−2, which is superior to that of 20% Pt/C. The mass activity of Pt@POMOF-1/KB is almost 100 and 37 times that of 20% Pt/C at overpotentials of 50 and 100 mV, respectively, as a consequence of the very low noble-metal loading. This result may provide an approach to meet the cost requirements for large-scale applications.
研究领域:
材料科学
·
电化学
·
催化
·
能源材料
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yehan Yang,Mengxia Xu,Zhu Luo,Ruhui He,Jikai Xie,Shenglong Yang,Hu Chen,Huaibin Li
To address the compatibility challenges between polypropylene (PP) and poly(ethylene terephthalate) (PET), a long-chain-branched polypropylene compatibilizer featuring ester groups (LCB-PP-E) was synthesized from PP and pentaerythritol triacrylate (PETA), facilitated by the initiator dicumyl peroxide. The structure of LCB-PP-E was characterized by using infrared spectroscopy, rheology, and melt flow index analysis, while potential reaction mechanisms were discussed. The morphology of the blend was examined by scanning electron microscopy and Raman spectroscopy. The effects of LCB-PP-E on the thermodynamic and crystallization behavior of PP/PET blends were studied by dynamic mechanical analysis, differential scanning calorimetry, and polarizing microscopy. LCB-PP-E sampled at the reaction peak point exhibited a longer branched PP chain compared to that of LCB-PP-E obtained at the balance torque, facilitating better entanglement with PP macromolecules. Furthermore, the ester groups on LCB-PP-E engaged in transesterification reactions with the ester groups on the PET chains. The combined effects of these interactions effectively reduced the interfacial tension between the two phases, resulting in a decreased size of the dispersed PET phase and a more uniform distribution. Additionally, the introduction of LCB-PP-E significantly narrowed the crystallization and glass transition temperature difference between the phases. The enhanced compatibility led to an increase in elongation at break, demonstrating a transition of the blend from a brittle material to a ductile material. This compatibilization system shows substantial potential for high-quality applications in PP/PET recycled plastics.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 7
·2640-2645
·
IF 7.367
Lin Yang,Ming Xuan Gao,Lei Zhan,Min Gong,Shu Jun Zhen,Cheng Zhi Huang
Early detection of cancer is helpful for the control and prevention of diseases. Due to the low content of cancer biomarkers in the early disease phases, however, an ultrasensitive and selective method is critical. In this contribution, an ultrasensitive surface-enhanced Raman scattering (SERS) immunoassay is newly developed with the principle of introducing a common enzyme-induced deposition (EID) reaction to coat a silver layer on the surface of gold nanoparticles and to form a core–shell nanostructure of Au@Ag. By using alkaline phosphatase (ALP) to dephosphorylate its substrate, 2-phospho-L-ascorbic acid trisodium salt (AAP), to form vitamin C, silver ions could be reduced into silver atoms and coated on the surface of the AuNPs; a greatly enhanced SERS signal was then obtained. As a proof of concept, α-fetoprotein (AFP) was detected as a target, which is a biomarker of liver cancer. Excellent analytical performance of the SERS immunoassay could be achieved in the range from 0.5 to 100 pg mL−1 with a limit of detection of 0.081 pg mL−1 (3σ). Identical results could be obtained by using the newly proposed SERS immunoassay for the clinical detection of AFP in serum samples of patients to those clinically obtained by chemiluminescence immunoassays, demonstrating the potential applications of the developed method in clinical diagnosis.
研究领域:
生物技术
·
纳米技术
·
分析化学
·
癌症研究
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2017
·Vol. 10
·期 11
·1320
·
IF 2.654
Hanjun Wu,Huali Zhang,Qingxue Yang,Dongsheng Wang,Weijun Zhang,Xiaofang Yang
In this work, calcined chitosan-supported layered double hydroxides (CSLDO) were synthesized through a co-precipitation method that restrained the particles’ aggregation of LDHs and exhibited huge specific surface areas, which can enhance the fluoride adsorption capacity. CSLDOs were characterized by physical and chemical methods and used for fluoride adsorption in an aqueous solution. The results indicated that the nanoparticles were constructed first and then assembled to form a porous and layered structure, and chitosan-supported layered double hydroxides (CSLDHs) calcined at 400 °C (CSLDO400) showed the highest specific surface area of 116.98 m2·g−1and the largest pore volume of 0.411 cm3·g−1. CSLDO400 exhibited excellent adsorption performance at a wide pH range from 5 to 9 for fluoride. The adsorption kinetics indicated that the adsorption reached equilibrium after 120 min, and followed a pseudo-first-order model. It agreed well with the Langmuir isotherm with maximum adsorption amounts of 27.56 mg·g−1. The adsorption of fluoride ions was spontaneous and endothermic. Furthermore, CSLDO400 showed a high stability for fluoride removal; it could still achieve 68% removal for fluoride after repeating five times of adsorption–desorption cycles. This study demonstrated that CSLDO400 is a promising functional material to remove fluoride from surface/ground water.Keywords:chitosan;layered double hydroxides;adsorption;fluoride removal;regeneration
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 THERMAL ANALYSIS AND CALORIMETRY
·
2022
·Vol. 147
·期 23
·13351-13361
·
IF 4.755
Shi Yanqin,Chen Lukai,Ma Biao,Lu Songyan,Chen Si,He Huiwen,Ma Meng,Wang Xu
An excellent migration resistant thermal stabilizer, an oligomer of bis-uracil derivative (P-UESU), was synthesized by the polymerization of UESU. The UESU was obtained by the reaction of 10-undecenyl aldehyde and 6-amino-1,3-dimethyluracil (DAU). The results of FTIR, DSC, and MS indicated that UESU and P-UESU were synthesized successfully, and P-UESU was an oligomer with more than four polymerization degrees. P-UESU could be used as the thermal stabilizer for PVC due to its high thermal stability. The super low migration ratio of P-UESU in PVC was proved by the migration resistant test, which is lower than 0.2%, better than OSU, USU, and commercial Ca/Zn thermal stabilizers. The reasons were ascribed to its big molecular volume and the physical entanglement with PVC molecular chains, which was confirmed by Flory–Huggins theory. Moreover, the static and dynamic thermal stability time of PVC with P-UESU/ESBO/TPP reached more than 160 min and 41 min, respectively. It was interesting that the excellent migration resistance of P-UESU was not affected by the addition of the auxiliary thermal stabilizers. The tensile strength and elastic modulus of PVC were also high, which were 26.93 MPa and 28.85 MPa. In conclusion, P-UESU had a good application prospect in practical application due to its excellent migration resistance and good thermal stability effect on PVC.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 11
·期 1
·178-186
·
IF 14.511
Zhenyu Wu,Qiang Hong,Xiting Wang,Hong Shi,Tianyang Zhang,Yu Zhao,Hui Huang,Yang Liu,Zhenhui Kang
Generation of clean hydrogen (H2) energy by photocatalytic water-splitting is a prospective method for solving the global energy crisis and environmental pollution and the design of new generation catalysts is expected to combine the functions of catalysis and reactor. Here, we illustrate the synthesis of organic polymer photocatalyst p(DB) synthesized from 5,11-dihydroindolo[3,2-b]carbazole and 1,2-bis(4-bromophenyl)ethane. The carbon dots (CDs) are utilized to modify p(DB) and the optimal sample 5% CDs/p(DB) exhibits highly efficient H2 production under visible light in an o-xylene-in-water emulsion, whose average rate of H2 evolution reaches 140.88 μmol g−1 h−1. Furthermore, the transient photovoltage (TPV) and photoelectrochemical measurements suggest that the CDs improve the charge transfer process and the charge extraction ability of p(DB). Moreover, the CDs play the role of an emulsifying agent as well as providing chemical reaction sites for photocatalytic water-splitting. This work provides a deep understanding of the functions of CDs to integrate a cocatalyst and reactor.
研究领域:
能源化学
·
催化科学
✓ 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）