Nanoscale Horizons
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2022
·Vol. 7
·期 5
·554-561
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IF 11.684
Huiqin Liu,Junyi Zeng,Liping Song,Lingli Zhang,Zihai Chen,Jianhua Li,Zhidong Xiao,Fengmei Su,Youju Huang
Generally, a high quality surface-enhanced Raman spectroscopy (SERS) substrate often requires a highly-tailorable electromagnetic (EM) field generated at nanoparticle (NP) surfaces by the regulation of the morphologies, components and roughness of NPs. However, most recent universal approaches are restricted to single components, and integrating these key factors into one system to achieve the theoretically maximum signal amplification is still challenging. Herein, we design a triple SERS signal amplification platform by the coordination of spiky Au NPs with rich-tip nanostructures, controllable silver nanoshell, as well as tailorable surface roughness into one nano-system. As a result, the theoretical electromagnetic field of the interfacial self-assembled 2D substrate can be improved by nearly 5 orders of magnitude, and the ideal tracing capability for the model SERS molecule can be achieved at levels of 5 × 10−11 M. Finally, diverse analytes in pesticide residues, environmental pollutants as well as medically diagnose down to 10−11 M and can be fingerprinted by the proposed SERS nano-platform. Our integrated triple amplification platform not only provides an effective SERS sensing strategy, but also makes it possible to simultaneously achieve high sensitivity, stability as well as universality into one plasmonic-based SERS sensing system.
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PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Xiaohong Ji,Wei Wang,Jizhou Duan,Xia Zhao,Lifei Wang,Yanli Wang,Ziyang Zhou,Weihua Li,Baorong Hou
In this research, the oleic acid (OA) and 2-mercaptobenzimidazole (MBI) encapsulated in the chitosan/poly(vinyl alcohol) (CS/PVA) core-shell nanofibers are synthesized and used for developing core-shell/epoxy composite coatings on Q235 steel substrate to enhance the service-life of coating systems. The results indicate the successful preparation of the CS/PVA core-shell nanofibers loaded with corrosion inhibitors . The corrosion protection performance of the composite coatings are evaluated by electrochemical impedance spectroscopy , revealing that the maximum inhibition efficiency of OA and MBI is 96.66% and 99.36% after 10 and 20 days immersion in alkaline and acidic electrolyte, respectively. Furthermore, the formation of a self-healing film over the metallic substrate after immersion in corrosive electrolyte is confirmed. The synergistic effect of chitosan protonation and MBI corrosion inhibitor makes the composite coating have high corrosion inhibition efficiency in acidic electrolyte. This pH-responsive self-healing approach is potentially useful for designing next-generation of self-healing coatings with high healing efficiency.
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Petroleum Science
·
2021
·Vol. 18
·期 3
·883-894
·
IF 4.09
Song Xu-Guang,Zhao Ming-Wei,Dai Cai-Li,Wang Xin-Ke,Lv Wen-Jiao
The ultra-low permeability reservoir is regarded as an important energy source for oil and gas resource development and is attracting more and more attention. In this work, the active silica nanofluids were prepared by modified active silica nanoparticles and surfactant BSSB-12. The dispersion stability tests showed that the hydraulic radius of nanofluids was 58.59 nm and the zeta potential was − 48.39 mV. The active nanofluids can simultaneously regulate liquid–liquid interface and solid–liquid interface. The nanofluids can reduce the oil/water interfacial tension (IFT) from 23.5 to 6.7 mN/m, and the oil/water/solid contact angle was altered from 42° to 145°. The spontaneous imbibition tests showed that the oil recovery of 0.1 wt% active nanofluids was 20.5% and 8.5% higher than that of 3 wt% NaCl solution and 0.1 wt% BSSB-12 solution. Finally, the effects of nanofluids on dynamic contact angle, dynamic interfacial tension and moduli were studied from the adsorption behavior of nanofluids at solid–liquid and liquid–liquid interface. The oil detaching and transporting are completed by synergistic effect of wettability alteration and interfacial tension reduction. The findings of this study can help in better understanding of active nanofluids for EOR in ultra-low permeability reservoirs.
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International Journal of Greenhouse Gas Control
·
2019
·
IF 3.231
Bihong Lv,Kunxiang Wu,Zuoming Zhou,Guohua Jing
Quantum chemical calculations was used for efficiently screening of the corrosion inhibitors from a series of organic and inorganic inhibitors for 20# carbon steel in CO 2 -saturated [TETAH][Lys] solution in the this work, which was different from the traditional usage by employed for confirming the experimental results. The inhibitors of MBI and Na 2 MoO 4 were emerged as the best alternatives, inhibiting the corrosion by provided a layer of protection between the carbon steel and the solution. It was found that the greatest contribution to the adsorption of MBI and Na 2 MoO 4 was S15 and Mo1, and these two inhibitors were of the mixed and anodic type inhibitor, respectively. The adsorption of them on carbon steel obeyed the Langmuir isotherm and involved competitive physisorption and chemisorption. The kinetic of the adsorptions were investigated, and the thermodynamic parameters had been calculated. The experimental results demonstrated a reasonably good agreement between theory and experiment, and a reference was provide for the optimum additive agent in the technical design.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Kaini Yang,Xiangyu Wang,Iseult Lynch,Zhiling Guo,Peng Zhang,Lisi Wu
Nano zero-valent iron (NZVI) is an ideal material for treating chromium (VI). However, the NZVI's low loading and corrosion susceptibility in acidic Cr-containing industrial wastewater is the most pressing issue. Therefore, it is necessary to explore a method to construct novel NZVI composites with high loading, corrosion resistance, and outstanding activity. In this study, green 2-mercaptobenzimidazole (MBI) was employed for the first time as a corrosion inhibitor for NZVI to form a protective coating through chemisorption, thus blocking the corrosion of NZVI by reaction medium. Meanwhile, a novel multiphase green crystallization-assisted pore formation freeze-drying method was constructed to synthesize UiO-66-NH 2 regulated 3D network porous polyacrylonitrile (PAN) cryogel film for stabilizing NZVI, which is intended to remove Cr(VI) effectively and without secondary contamination. The synthesized MBI-Fe 0 @MOF/PAN possessed prominent activity, corrosion resistance, and considerable NZVI loading (45.9 mg/g). The Cr(VI) removal could still reach 82.7 % after 6 cycles, and the level of total dissolved iron ions was lowered to 0.255 mg/L. MBI-Fe 0 @MOF/PAN for rapid removal of Cr(VI) may be ascribed to the synergistic reaction of rapid protonation of MBI and strong reduction of NZVI. This study constructed the MBI corrosion-resistant interface and 3D PAN cryogel film concepts not only to broaden the horizons of designing efficient NZVI catalytic materials but also to promote the development of treatment technologies for acidic Cr-containing industrial wastewater.
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Journal of Water Process Engineering
·
2023
·
IF 7
Haoran Dong,Shunyan Ning,Zengyuan Li,Sizhi Xu,Shichang Zhang,Xinpeng Wang,Youbin Wang,Lifeng Chen,Xiangbiao Yin,Toyohisa Fujita,Mohammed F. Hamza,Yuezhou Wei
Separation of palladium from high level liquid waste (HLLW) not only manages the dispose of HLLW, but could also aid in overcoming the shortage of palladium resources. Herein, three novel adsorbents, namely, 2-mercaptobenzimidazole (MBI)/XAD7HP, 2-mercaptobenzothiazole (MBT)/XAD7HP, 2-mercaptobenzoxazole (MBO)/XAD7HP were prepared by vacuum impregnation method using Amberlite XAD7HP resin (XAD7HP) as the carrier for the selective separation of Pd(II) from simulated HLLW. SEM-EDS (Scanning Electron Microscopy), BET (Brunauer-Emmett-Teller) and PXRD (Powder X-ray diffraction) analysis showed that the ligands were successfully impregnated into the carrier. The saturated adsorption capacities of MBI/XAD7HP, MBT/XAD7HP, MBO/XAD7HP in 0.5 M HNO 3 were 126.2 mg Pd/g, 137.6 mg Pd/g, 98.4 mg Pd/g, respectively, and excellent adsorption and separation performance towards Pd(II) ( SF Pd/other metals > 500 and K d > 10 4 mL/g from 0.1 to 4 M HNO 3 ) were also achieved. The adsorption kinetics and adsorption isotherms for Pd(II) matched well with pseudo-second-order kinetic model and Langmuir model, indicating that the adsorption for Pd(II) by three adsorbents were monolayer chemical adsorption . The adsorption mechanism was analyzed by FT-IR, XPS combined with DFT calculation. The extremely high selectivity of three adsorbents towards Pd(II) among 15 metal ions is due to the soft N and S donor atoms at ligands which have good affinity for Pd(II) in HNO 3 solution. As MBT/XAD7HP exhibited the best adsorption and separation properties, it is supposed to have more application potential for the separation of Pd(II) from HLLW.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 3
·C145
·
IF 3.662
Xuehui Liu,Chuanjun Gu,Zheng Ma,Xiumin Ma,Baorong Hou
In this study, TiO2 containers with an empty core and a mesoporous shell were successfully synthesized via hydrothermal reaction. The as-prepared TiO2 was used as carrier to load the corrosion inhibitor 2-mercaptobenzimidazole (MBI). The outer shell of inhibitor-loaded containers was modified by a SiO2 film, which was obtained from hydrolysis of tetraethyl orthosilicate (TEOS) and (3-aminopropyl) triethoxysilane (APTES). The structure of the TiO2 containers was studied using X-ray diffraction (XRD) analysis, field emission scanning electron microscopy (FESEM), and Fourier transform infrared (FTIR) spectrometry. The release behavior of the corrosion inhibitor was investigated using UV-visible spectroscopy. The corrosion protection performance of the water-based epoxy coating with modified TiO2 containers was studied by using electrochemical impedance spectroscopy (EIS) and a scanning Kelvin probe (SKP). The coating with modified TiO2 containers demonstrated enhanced film barrier properties compared with blank coating. Results obtained from SKP measurements confirmed active corrosion protection performance of the studied TiO2 containers.
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NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 14
·11396-11403
·
IF 3.201
Lilong Gao,Wenlin Wang,Bing Yu,Hailin Cong
Responsive polymers have significant importance and promising applications in the field of biomedicine. In this study, benzimidazole (BI)-based polyesters were synthesized for the first time via amine-ene click polycondensation. Benzimidazolethione (BITO) and aliphatic diacrylates (DA) were selected as clickable monomers using the organic catalyst 4-dimethylaminopyridine (DMAP) to obtain benzimidazole-based polyesters. 1,4-Butylene diacrylate (BDA) and poly(ethylene glycol) diacrylate (PEGDA) were used as model DA to synthesize lipophilic and hydrophilic polymers, respectively. Furthermore, click polymerization of BITO with BDA and PEGDA was conducted for tricomponent polycondensation. 1H NMR, FTIR and GPC spectra demonstrated that the BITO-based polyesters were successfully synthesized via the click condensation of amine-ene. The obtained polymers exhibited pH, reactive oxygen species (ROS) and β-cyclodextrin (β-CD) triple responsiveness and the amphiphilic BITO polyester can self-assemble into nanoparticles. We believe that these novel BITO polyesters have great potential as drug delivery systems for controlled drug release in nanomedicine.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Hao Yang,Ping He,Henglun Cheng,Baoqing Shentu
To promote the anti-aging performance of thermoplastic vulcanizates (TPVs) versus ultraviolet (UV)/O3 exposure, a nano-TiO2-loaded antioxidant (TiO2-KH570-MB) was prepared by a thiol–ene reaction between 2-mercaptobenzimidazole (MB) and modified nano-TiO2 (TiO2-KH570). Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis demonstrated the chemical linkage between MB and modified nano-TiO2, and the loading amount of MB was approximately 5.19 wt %. The contact angle test showed that the surface hydrophobicity of TiO2-KH570-MB was significantly increased due to the immobilization of MB. Scanning electron microscopy revealed that TiO2-KH570-MB was uniformly distributed in the TPV matrix. The anti-aging property of TPV compounds was tested in the device with high-intensity ultraviolet radiation and high-concentration ozone. The effects of UV/O3 comprehensive aging on the TPV compounds were evaluated by means of the variations of surface morphology, tensile test, hardness, gel content, and carbonyl index with aging time. On the basis of the aging behavior, we concluded that TPV/TiO2-KH570-MB exhibited excellent stability against UV/O3 aging, due to the homogeneous dispersion, low level of migration, and low volatility of TiO2-KH570-MB.
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NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 7
·5750-5758
·
IF 3.086
Yinghui Bian,Jinshe Chen,Shaotang Xu,Yulu Zhou,Lijun Zhu,Yuzhi Xiang,Daohong Xia
Two novel metal-free phthalocyanines have been designed and synthesized, namely tetra{[1H-benzo(d)imidazol-2-yl]thiol}phthalocyanine (TBIT-Pc) and tetra{[benzo(d)thiazol-2-yl]thiol}phthalocyanine (TBTT-Pc). These two compounds showed similar structures, while imidazolyl-NH in the substitutes of TBIT-Pc could form more hydrogen bonds. TBIT-Pc and TBTT-Pc were fully characterized by elemental analysis, 1H NMR, MALDI-TOF MS, FT-IR and the UV-Vis absorption spectrum. The self-assembly properties of TBIT-Pc and TBTT-Pc were comparatively studied. TBIT-Pc and TBTT-Pc were present as monomers in DMF in the concentration range of 9.04–20.3 μM. Depending mainly on the intermolecular hydrogen bonding (N–H⋯N) between benzimidazole substitutes, “head-to-tail” J-aggregates of TBIT-Pc were formed in DMSO, while there was no aggregation of TBTT-Pc in the same solvent. “Face-to-face” H-aggregates of TBIT-Pc and TBTT-Pc were formed with the addition of water to the solutions of DMSO, and the degree of aggregation increased with the introduction of H-bonds (N–H⋯N) in the benzimidazole substitutes of TBIT-Pc. The atomic force microscope (AFM) image and dynamic light scattering (DLS) displayed the formation of well-defined nanoparticles with a diameter of ca. 30 ± 15 nm with J-type aggregation of TBIT-Pc. And the dendritic nanostructures with H-aggregates of TBIT-Pc and TBTT-Pc with different size were observed from transmission electron microscopy (TEM) images. The possible mechanism of the effect of H-bonds on the formation of J-aggregates of TBIT-Pc and the H-aggregation of TBIT-Pc and TBTT-Pc was also discussed. In the formation process of aggregates, H-bonds and π–π interaction may be the dominant factors. In addition, the nanostructures fabricated from TBIT-Pc and TBTT-Pc showed good semiconducting properties revealed by current–voltage measurements.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Zhang Lili,Zhang Ning,Shang Huishan,Sun Zhiyi,Wei Zihao,Wang Jingtao,Lei Yuanting,Wang Xiaochen,Wang Dan,Zhao Yafei,Sun Zhongti,Zhang Fang,Xiang Xu,Zhang Bing,Chen Wenxing
Double-atom catalysts (DACs) have opened distinctive paradigms in the field of rapidly developing atomic catalysis owing to their great potential for promoting catalytic performance in various reaction systems. However, increasing the loading and extending the service life of metal active centres represents a considerable challenge for the efficient utilization of DACs. Here, we rationally design asymmetric nitrogen, sulfur-coordinated diatomic iron centres on highly defective nitrogen-doped carbon nanosheets (denoted A -Fe 2 S 1 N 5 /SNC, A : asymmetric), which possess the atomic configuration of the N 2 S 1 Fe-FeN 3 moiety. The abundant defects and low-electronegativity heteroatoms in the carbon-based framework endow A -Fe 2 S 1 N 5 /SNC with a high loading of 6.72 wt%. Furthermore, A -Fe 2 S 1 N 5 /SNC has a low overpotential of 193 mV for the oxygen evolution reaction (OER) at 10 mA cm −2 , outperforming commercial RuO 2 catalysts. In addition, A -Fe 2 S 1 N 5 /SNC exhibits extraordinary stability, maintaining > 97% activity for over 2000 hours during the OER process. This work provides a practical scheme for simultaneously balancing the activity and stability of DACs towards electrocatalysis applications.
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FLUID PHASE EQUILIBRIA
·
2024
·
IF 2.8
Pengshuai Zhang,Keyi Lu,Han Sun,Chunxia Jin,Ranran Feng,Jixiu Deng,Jiaqi Sun,Shuwei Yu,Beibei Zhang,Lu Zhang,Jianzheng Li
The solubility of drugs is an important physicochemical data for its development and design. In this work, the solubility of 2-mercaptobenzimidazole (2-MBI) in eleven mono-solvent solvents (2-propoxyethanol, isopropyl acetate, butyl acetate , 2-methoxyethanol, 2-butanol, ethyl formate , 2-ethoxyethanol, isobutanol , 4-methyl-2-pentanone, 2-butoxyethanol and ethylene glycol) and three binary solvents (2-methoxyethanol + ethyl formate, 2-methoxyethanol + isopropyl acetate, 2-ethoxyethanol+ ethyl formate) was measured by a gravimetric analysis method at the temperatures from 283.15 to 323.15 K. The solubility of 2-MBI in the studied solvents increased with the increasing temperature. The measured solubility data of 2-MBI was described mathematically and back-calculated by CNIBS/R-K model, Margules model, UNIQUAC model, Jouyban-Acree-van't Hoff model and NRTL model. Hansen solubility parameters was calculated to assess the qualitative trend of 2-MBI in all selected mono and binary mixed solvents, analysis results indicating that the solubilization behavior of 2-MBI was intricate and can not only be assessed by one factor. In this study, the apparent thermodynamic parameters including ∆ sol H o , ∆ sol S o , ∆ sol G o , ξ H and ξ TS were investigated, positive values of ∆ sol H o indicating that the corresponding dissolution process of 2-MBI in all selected solvents was endothermic. In conclusion, these experimental and thermodynamic analysis can enrich the database and give support for design and optimize the crystallization process of 2-MBI.
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