COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Lei Guo,Lei Zhu,Savaş Kaya,Rui Sun,Alessandra Gilda Ritacca,Kai Wang,Jun Chang
Mild steel is a versatile, inexpensive, highly flexible, and easily weldable material widely used in construction, pipelines, transportation, shipping, and other industries. However, it is also extremely susceptible to corrosion processes under the influence of weather phenomena, posing a significant threat to society and human health. In this work, we investigated the corrosion inhibition capacity of a new type of N, S codoped carbon dots (N, S-CDs) on Q235 carbon steel in the acidic medium. The goal product was synthesized by hydrothermal method using o-phenylenediamine and amidinothiourea as precursors. Combined with electrochemistry, Fourier transform infrared (FTIR) spectroscopy, scanning electrochemical microscopy (SECM), and theoretical calculations, the inhibition properties of N, S-CDs on Q235 carbon steel in HCl solution were evaluated. The potentiodynamic polarization (PDP) curves and electrochemical impedance spectroscopy (EIS) results indicated that the corrosion inhibition efficiency reached 90.3 % and 92.4 % at 100 mg/L concentration, respectively. Indeed, the presence of N, S-CDs reduced the electric double-layer capacitance, increased the thickness of the adsorption film on the carbon steel surface, and reduced the corrosion current density, resulting in a delay of corrosion. X-ray photoelectron spectroscopy (XPS) analysis and surface characterization confirmed the successful doping of N, S and the formation of adsorption films, the Langmuir adsorption isotherm also confirmed the superior inhibition of N, S-CDs on the surface of Q235 carbon steel through physical and chemical adsorption mechanisms. At the same time, quantum chemical calculations and molecular dynamics (MD) simulations revealed its inhibition mechanism at the molecular/atomic level.
研究领域:
材料科学
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电化学
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表面科学
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DOI
高影响因子
ChemElectroChem
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2019
·Vol. 7
·期 4
·914-921
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IF 3.975
Weiyuan Guo,Kang Ding,Shixiong Mei,Xingxing Li,Xiaoyu Feng,Siguang Guo,Jijiang Fu,Xuming Zhang,Biao Gao,Kaifu Huo,Paul K. Chu
Graphical Two for the price of one : Hollow spheres consisting of in situ generated SnS nanosheets (SnS@C HSs) conformally coated with S-doped carbon are fabricated using polystyrene spheres as the self-sacrifice template and carbon source. Thanks to the unique structure, the SnS@C HSs exhibit excellent performance for both lithium- and sodium-ion batteries. Although tin sulfide is a promising anode material for lithium- and sodium-ion batteries due to the layered structure and high theoretical capacity, the large volume expansion and poor kinetics have seriously hindered further development and application. In this work, hollow spheres consisting of in situ generated SnS nanosheets (SnS@C HSs) conformally coated with S-doped carbon are fabricated using polystyrene spheres as the self-sacrifice template and carbon source. The SnS@C HSs with a large SnS interlayer distance, S-doped carbon matrix, and hollow structure not only relieve the pressure caused by volume expansion during cycling, but also promote fast transfer of lithium/sodium ions leading to a high pseudocapacitance. The SnS@C HSs have excellent electrochemical properties in both LIBs and SIBs such as high capacity, high rate, and outstanding cycling stability. The use of a self-sacrifice template is demonstrated to be a convenient and efficient strategy to design and prepare carbon-coated metal hollow spheres for efficient energy storage and conversion.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Ziwei Zhao,Haoyun Dou,Xuanpan Xu,Rongjie Zhe,Qingye Zhao,Lingxia Zheng,Xinjun Bao,Ting Zhu,Hong-En Wang
Rational design of effective cathode host materials is an effective way to solve the problems of serious shuttle and slow conversion of polysulfides in lithium-sulfur batteries (LSBs). However, the redox reaction of sulfur differs from conventional “Rocking chair” type batteries and involves a cumbersome phase transition process, so a single-component catalyst cannot consistently and steadily enhance the reaction rate throughout the redox process. In this work, a hybrid composed of magnetopyrite Fe 1−x S catalyst-modified with N/S-doped porous carbon spheres (Fe 1−x S@NSC) is proposed as a novel sulfur host to synergistically promote the adsorption and redox catalysis conversion of polysulfides. In this hybrid, the NSC skeleton provides excellent electrical conductivity and abundant adsorption sites for the physical immobilization of polysulfides; the magnetopyrite Fe 1−x S nanoparticles promote the fast conversion reaction from Li 2 S 2 to Li 2 S, affording strong adsorption and catalytic conversion. The optimal LSB with Fe 1−x S@NSC manifests a high initial capacity of 971 mAh g −1 at 0.2 C (1 C = 1675 mAh g −1 ) and a retention rate of up to 75 % after 100 cycles. This work can provide a new approach for rationalizing the novel transition metal sulfide/porous carbon-based composite hosts with efficient lithium polysulfides (LiPSs) adsorption and catalytic conversion in high-performance lithium-sulfur batteries.
研究领域:
材料科学
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能源存储与转换
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2019
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IF 6.97
Chunshan Lu,Qianwen Zhu,Xuejie Zhang,Haoke Ji,Yebin Zhou,Hao Wang,Qiangqiang Liu,Juanjuan Nie,Wenfeng Han,Xiaonian Li
Achieving high selectivity is one of the major challenges for the noble metal catalysts. A strategy of decoration of Pd nanoparticles by N–S doped carbon quantum dots (N,S-CQDs) to regulate selectivity is proposed. Through adjusting the loading amounts of N,S-CQDs, high selectivity toward catalytic hydrogenation reactions can be obtained. N,S-CQDs facilely adhere to the Pd nanoparticle via surface reactions among C–S/C–N species of N,S-CQDs and C–O species of the carbon support under the catalysis of Pd particles. N loss was detected due to the transformation of some C–N species into nitrogen-containing soluble substances or gas. However, S-containing species, specially −SO2/SO3 species, are turned into C–S–C (thiophene-S), leading to a strong coordination between Pd and S. As a result, a N,S-CQDs-Pd interface is fabricated, in which electrons transfer from Pd to S species and the interface of Pd–S plays a major role in hydrogen spillover and generation of dissociated hydrogen with negative charge. Consequently, Pd@N,S-CQDs suppress the hydrodehalogenation and exhibit superior conversion and selectivity (both 100%) for the selective hydrogenation of various halonitrobenzenes. N,S-CQDs as a nonmetallic promoter of metal catalysts provides a promising strategy for the improvement of selectivity.
研究领域:
化学
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材料科学
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催化
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Junxia Shao,Heng Fei,Hua Li,Liujun Yang,Miaomiao Li,Jin Gao,Huarong Liao,Jianmei Lu
Promoting carrier separation has received much attention owing to attractive enhancement effects in improving the utilization efficiency of photo-generated carrier. However, the photocatalytic performance has remained limiting mainly due to lack of magnifying carrier generation fundamentally. Herein, carrier generation enhanced CNS 0.6 /Au-1 is established by loading ultrafine Au nanoparticles on S-doped carbon nitride (CNS x ) for efficient hexavalent chromium degradation. CNS x can activate the n → π* electronic transition of carbon nitride besides keeping the original π → π* electronic transition. Plasmon-induced hot electron of Au nanoparticles merge with e − excited from π → π* and n → π* transition in CNS x increasing the amount of catalytically effective electrons, and the efficient carrier separation is also achieved. Near-infrared absorption CNS 0.6 /Au-1 exhibits a remarkable photo-reactivity for the degradation of Cr(Ⅵ), which can degrade 10 ppm Cr(Ⅵ) completely within 40 min. This work proposes a general strategy of increasing different types of electron transitions to promote carrier generation.
研究领域:
材料科学
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环境科学
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光催化
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2024
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IF 4.1
Wen Li,Yan-feng Li,Qian Lu,Cong-de Qiao,Zhi-zhou Yang,Yun-qiang Zhang,Xian Zhang,Hui Zhao
N/S-doped carbon dots/gold nanoparticles/Ag + (N/S-CDs/AuNPs/Ag + ) as a dual-mode nanoprobe was constructed to detect ascorbic acid (AA). Compared with simple carbon dots, N/S-CDs exhibited superior fluorescence properties, which could play a more important role in building a sensitive homogenous FRET fluorescence detection platform. Moreover, AuNPs/Ag + was reduced to core-shell Au@AgNPs by AA in an alkaline environment, which could induce the localized surface plasmon resonance (LSPR) and led to the change of UV absorption peak position from 520 nm to 426 nm with the color changing from pink to bright yellow. Due to the fluorescence “turn on-off” and LSPR, the N/S-CDs/AuNPs/Ag + nanoprobe is inspected for the sensitive dual-mode detection of AA. The linear detection ranges are from 0.5 to 100 μM for colorimetric mode and 0.5–90 μM for fluorescence method. Their LODs are 0.17 and 0.10 μM, respectively. Furthermore, this proposed nanoprobe showed high sensitivity and accuracy for AA detection in real orange juice, displaying great possibility in food testing.
研究领域:
分析化学
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纳米技术
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食品科学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Yao Fan,Lu Shen,Yaqi Liu,Ying Hu,Wanjun Long,Haiyan Fu,Yuanbin She
A ratiometric fluorescent probe based on N/S doped carbon dots (N/S-CQDs) and mercaptoacetic acid capped CdTe quantum dots (TGA-CdTe QDs) with sensitized and self-calibration functions was constructed to sensitively detect multiple tetracycline antibiotics (TCs). N/S-CQDs could attach stably to TGA-CdTe QDs and form a new composite ratiometric fluorescent probe that had a more than tenfold increase in sensitivity to TCs compared with each single QD. The probe could detect four common TCs as the color of the probe changed from bright red to dark red, and the limit of detection (LOD) was 1.47 × 10 −2 –1.78 × 10 −2 mg/L. Practical applications of the probe in food and urine were also verified with recovery rates of 95.21%-104.97%. Due to the abundant spectral fingerprints provided by both QDs, this novel probe could accurately recognize not only different single TCs but also mixed TC samples even in actual samples combined with chemometrics.
研究领域:
分析化学
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食品科学
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纳米技术
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环境科学
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产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
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2023
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IF 4.5
Guizhen Yu,Qingyu Niu,Xiao Liu,Liang He,Jinxie Yu,Hang Han,Wenjing Wang,Ying Zhang,Zhiqiang Li,Qingqing Xiong
In this work, hybrid anisotropic hydrogel is developed through dispersing carbon quantum dots , ultrahigh magnetic nanoparticle-coated alumina (Fe/Al 2 O 3 ) platelets in acrylamide aqueous solution in the assistance of magnetic field, then fix the oriented structure via gelation . The aligned Fe/Al 2 O 3 platelets result in formation of anisotropic structure, thus endows the hydrogels mechanical anisotropy and fluorescent anisotropy. White-light emission is obtained via varying the weight ratio of yellow-emitting ZnO QDs and blue-emitting N,S-CDs. This strategy not only enriches the mechanical/fluorescent dual anisotropic soft materials, but also have great potential application in the fields of organic light-emitting diodes, nonlinear optics and field effect transistors .
研究领域:
材料科学
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光电技术
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纳米技术
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软物质物理
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产品关联
DOI
高影响因子
Acta Biomaterialia
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2023
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IF 9.7
Qiying Lv,Kai Chi,Xiaolei Shi,Miaodeng Liu,Xiaoye Li,Cheng Zhou,Lin Shi,Huiling Fan,Huan Liu,Jia Liu,Yan Zhang,Shuai Wang,Lin Wang,Zheng Wang
Selectively generating active free radical (AFR) in tumor microenvironment (TME) can promote irreversible oxidation of biomolecules and damage tumor cells, resulting in effective tumor inhibition. However, therapeutic efficacy of AFR-based tumor suppression approaches is often limited by insufficient amount of H 2 O 2 or O 2 within TME. To overcome this obstacle, we design a pH/photothermal dual responsive nanosystem ( [email protected] ) for combined photothermal and nanocatalytic therapy in the near-infrared biowindow. Here the Fe single-atom dispersed N, S-doped carbon nanosheets (FeSA) nanozyme is dispersed by phospholipid-polyethylene glycol-amine (DSPE-PEG-NH 2 ), and further loads artesunate (AS) via an amide reaction. Upon 808-nm laser irradiation in TME, the AS is released and further be catalyzed by the FeSA nanozyme to produce cytotoxic C-centered AFRs, and further be accelerated due to the photothermal conversion performance of FeSA (23.35%). The nanocatalytic process of FeSA nanozyme is realized by density functional theory (DFT). The tumor inhibition rates of a CT26 xenograft model is 92% through a photothermal-enhanced nanocatalytic synergistic therapy, and negligible systematic toxicity is observed. This work offers a potential paradigm of multifunctional single atomic catalysts (SACs) for enhancing tumor nanocatalytic therapy. Statement of significance We designed a pH/photothermal dual responsive nanosystem ( [email protected] ) for nanocatalytic therapy: (1) the nanosystem responsively releases AS under 808-nm laser irradiation in TME; (2) FeSA in the nanosystem can act as heme mimetic to convert AS into high cytotoxic C-centered free radicals for nanocatalytic therapy; (3) the photothermal conversion performance of FeSA further enhances the catalytic process to yield abundant AFR. Both in vitro and in vivo results demonstrate that this nanosystem can efficiently inhibit tumor growth through a photothermal-enhanced nanocatalytic synergistic therapy.
研究领域:
癌症治疗
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纳米技术
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光热疗法
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药物递送系统
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）