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.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wei Dong,Chunyan Du,Yin Zhang,Jiao Cao,Jingyi Jiang,Lu Zhou,Guanlong Yu,Yulv Zou,Huaiyuan Peng,Rong Yan,Yu Yang
Visible light-driven photocatalysis often struggles with fast recombination of photogenerated electron-hole pair and unsatisfactory degradation efficiency of hazardous micropollutants, such as antibiotics. Constructing an effective heterojunction can address these challenges. In this study, a novel S-scheme MIL-53(Fe)/FeOCl heterojunction composite was synthesized using a hydrothermal method. Factors influencing oxytetracycline (OTC) removal and the underlying reaction mechanism were investigated. The MF-10 composite demonstrated a remarkable removal efficiency of 90 %, significantly higher than that of MIL-53(Fe), which was 54 %. Even after six cycles, the degradation efficiency only decreased by 8 %, and the composition of MF-10 remained unchanged, indicating excellent durability. The photocatalytic process involves crucial reactive species such as · OH, SO 4 • – , O 2 • – , and h + . The heterojunction construction extends the absorption range of visible light, and the internal electric field enhances the separation of photogenerated electron-hole pairs while maintaining robust electron and hole activity. Additionally, photogenerated electrons facilitate the Fe(II)/Fe(III) cycling, resulting in the production of more reactive species for OTC degradation. This work introduces a novel approach to enhance the activity of photocatalysts and provides valuable insights into the design of peroxydisulfate activators.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Kuan Wang,Tong Sun,Hui Ma,Yi Wang,Zhen-Hong He,Huan Wang,Weitao Wang,Yang Yang,Lei Wang,Zhao-Tie Liu
The photo-driven CO 2 reduction holds significant potential in facilitating carbon fuel conversion. However, the inefficiency of charge conversion severely limits its spractical applications. Herein, the charge transfer routeway was tailored in NiO/BiOCl-7 heterostructures via a transform from type-II to S-scheme for enhancing CO 2 photoreduction to CO. Such S-scheme NiO/BiOCl-7 heterojunctions were prepared by pH-modulation to optimize the energy band structure of BiOCl and introduce abundant oxygen vacancies. Surprisingly, the S-scheme NiO/BiOCl-7 heterojunctions exhibited a significantly enhanced production of CO (78.11 μmol·g −1 ·h −1 ) with an impressive selectivity of 97.1 %, representing a remarkable 1.7- and 4.3-fold improvement in CO yield compared to the type-II NiO/BiOCl heterojunctions and pure BiOCl samples, respectively. The in-situ spectral experiments and DFT calculations reveal that the superior CO production can be attributed to a lower energy barrier for COOH* and a smoother potential energy surface of the S-scheme heterojunction with abundant oxygen vacancies. This meticulous strategy of energy band modulation sheds light on the deliberate customization of Bi-based heterostructures with favorable charge transfer for highly effecient photocatalysis.
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JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Ziliang Li,Li Gao,Xuemei Wu,Xiaobin Jiang,Xiangcun Li,Wu Xiao,Wanting Chen,Wenji Zheng,Xuehua Ruan,Xiaoming Yan,Gaohong He
The advancement of the ionic conductivity and dimensional stability of anion exchange membranes (AEMs) while ensuring excellent alkali stability is the critical challenge in the development of AEM fuel cells. Construction of efficient ion transport channels through well-designed microphase morphology is considered to be an effective strategy to achieve this goal. Herein, we propose an ingenious design that a novel aryl ether-free poly(phenyl-alkane)s-based AEMs to optimize the conductivity and longevity of AEMs using rigid aryl units, i.e., 1,4-dimethoxybenzene and spirobisindane, as the main chains with connecting flexible alkyl chains. The rigid and non-rotatable aromatic structure can facilitate the formation of a well-defined microphase separation structure with long chain quaternary ammonium by reducing chain segment interactions, and can also ameliorate the dimensional stability of the membrane. Consequently, the as-prepared membrane exhibits an excellent hydroxide conductivity of 130 mS cm −1 at 80 °C and approaches a terrific conductivity retention rate of 90 % after immersion in 1 M NaOH solution at 80 °C for 1000 h. Furthermore, the as-prepared membrane achieves an excellent peak power density of 1.36 W cm −2 in the H 2 -O 2 fuel cell and its initial voltage shows no signs of decreasing after running for 20 h under 0.2 A cm −2 .
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International Journal of Electrochemical Science
·
2024
·
IF 1.3
Yanjie Xue,Jinsheng Zhao,Aifeng Li
Li-oxygen (Li-O 2 ) battery is a novel energy storage equipment. However, its poor reaction reversibility relating to the insoluble lithium peroxide (Li 2 O 2 ) generated during the discharge process, limits its application and development for large scale use. Therefore, the design and synthesis of effective catalysts which can efficiently catalyze the production and decomposition of Li 2 O 2 and exclude the generation of side-products has become the primary task to develop Li-O 2 batteries. Herein, a new type of electrocatalyst based on single-atom Ru and N, S-co-doped carbon materials (Ru/CNS/CNT) is introduced to reduce the overpotential of the battery reaction and accelerate the formation and decomposition of Li 2 O 2 . Galvanostatic charge-discharge tests were performed on the Li-oxygen (Li-O 2 ) battery with Ru/CNS/CNT as the cathode catalyst material. With a limited specific capacity of 1000 mA h g −1 , the battery can stably cycle for 79 cycles at a current density of 200 mA g −1 . Furthermore, the existence of the single atom of Ru was demonstrated according to the characterization of HAADF-STEM. The experimental results showed that composite material Ru/CNS/CNT can accelerate the formation and decomposition of lithium peroxide (Li 2 O 2 ), thereby greatly improving the cycling stability of the battery.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuqiao Jiang,Xinyu Yuan,Peiru Wang,Linyan Cheng,Ranran Li,Qinghua Qu,Cheng Fang,Hongping Li,Jing Ding,Hui Wan,Guofeng Guan
The elimination of carbon dioxide (CO 2 ) from the industrial post-combustion dilute CO 2 has been a hot issue and the selective conversion of CO 2 from the exhaust gas stream still remains a challenge. Herein, dihydroxy functionalized binuclear carbonate based poly(ionic liquid)s (HB-PILs) were prepared for conversion of low-concentration CO 2 from the dilute CO 2 (15 vol% CO 2 + 85 vol% N 2 ) into cyclic carbonate. Using epichlorohydrin as a probe substrate, the obtained HB-PILs exhibited excellent catalytic performance for the CO 2 cycloaddition reaction. Under optimized process parameters (100 ℃, 2 MPa and 4 h), the highest yield (95 %) of chloropropene carbonate (CPC) was obtained, which was comparable to the previous reported results. Moreover, the synergetic effect between the activation of epoxides by dihydroxyl groups and the adsorption of CO 2 by basic CO 3 2- ions was studied through the theoretical calculations. DFT results indicated that CO 3 2- served as the nucleophilic site, working synergistically with hydrogen bond donors to facilitate the ring-opening of epichlorohydrin (ECH). Additionally, CO 3 2- functioned as the basic site to activate CO 2 . This study will provide a promising solution for mitigating global climate change and advancing the green chemistry of CO 2 utilization from dilute CO 2 .
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kefen Yang,Jinman Yang,Yusupu Yesire,Kang Zhong,Pengcheng Yan,Huanzhi Liu,Huaming Li,Yanhua Song,Minqiang He,Hui Xu
Photocatalytic CO 2 conversion efficiency is still much lower than what is expected owing to the sluggish charge separation and transfer for many semiconductors. Herein, we fabricated a highly efficient S-scheme heterojunction by integrating the CuInS 2 (CIS) with the oxygen-doping brown polymer carbon nitride (PCN). The construction of CIS/PCN S-scheme heterojunction promotes spatial separation of photogenerated charge while maintaining their strong reduction capability. The formed intimate contact interface between the CIS and PCN provides the strong driving force for the transfer of photogenerated charge, which accelerates the electrons rapidly migrating from PCN to CIS through the tight interface, resulting in more reductive electrons participating in photocatalytic reaction. As a result, the CIS/PCN S-scheme heterostructure shows a remarkably enhanced photocatalytic activity with a CO yield rate of up to 105.89 μmol g -1 h −1 , which is 7 times higher than that of the CIS. Combined density functional theory (DFT) calculations with experimental results demonstrate the formation of an intimate contact interface is not only more conducive to CO 2 adsorption and activation but also lowers the reaction energy barrier of the conversion of CO 2 to CO. Meanwhile, ESR characterization reveals the electron transfer pathway of CIS/PCN for photocatalytic CO 2 conversion. This work may provide an illuminating insight into designing the S-scheme photocatalyst for enhanced CO 2 photoreduction.
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ENERGY & FUELS
·
2024
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IF 5.2
Penghua Zhao,Jiachuan Chen,Lei Zhang,Chenglong Qiu,Baobin Wang,Jinze Li,Kai Zhang,Guihua Yang
Heteroatom-doped porous carbon has become a key material in the field of supercapacitors (SCs) and the oxygen reduction reaction (ORR). Here, eucalyptus pulping red liquor was used as the starting material for a straightforward one-step NH4Cl-assisted carbonization technique that produced a nitrogen and sulfur codoped bifunctional porous carbon material. The sulfur in sodium lignosulfonate was used as a S atom dopant. NH4Cl added to the red liquor can not only produce NaCl as a template but also as a nitrogen source. The resulting carbons possess rich hierarchical porous structures and high specific surface area (1092 m2 g–1) and ID/IG ratio (1.04), leading to remarkable electrocatalytic activity with a specific capacitance of 326 F g–1 at 0.5 A g–1 for capacitance and an identical onset and half-wave potentials of 0.988 V vs reversible hydrogen electrode (RHE) and 0.847 V vs RHE for the ORR, as compared with the benchmark Pt/C catalyst. Furthermore, when BLC-N/S-1000 was used as an electrocatalyst in an air electrode of a zinc–air battery, it showed superior long-term stability for 356 h at 5 mA cm–2 and 20 min/cycle. Results in the present work pave a new green method to convert abundant low-cost biomass into high-end heteroatom-doped carbons with rich hierarchical porous structures for electrochemical energy devices.
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JOURNAL OF ELECTRONIC MATERIALS
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2025
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IF 2.5
Tan Shangrong,Yao Zhuo,Huang Hong,Liu Zechen,Guo Shiqi,Zhao Xinyun
Electrochemical supercapacitors, given their high power density and excellent cycling stability, have broad applications from electronic devices to electric vehicles. In this study, we have developed novel nanocomposites to serve as electrodes of high-performance supercapacitors. The nanocomposites, referred to as Cu/MnX x (X = O, S, C)-rGO (rGO: reduced graphene oxide), were fabricated through direct oxidation, sulfidation, and carbonization at elevated temperatures from their metal–organic framework origin, i.e., Cu/Mn-BTC-rGO (BTC: benzene–1,3,5-tricarboxylic acid). This process is cost-effective and scalable, and can be fine-tuned to achieve a variety of nanocomposites with the desired chemistry and structural characteristics. The carbonized product, Cu/MnC x -rGO, is made up of nanoparticles of MnO and copper in close contact supported on rGO nanosheets via strong coupling. This material demonstrates excellent charge storage, rate capability, and cycling stability, i.e., high specific capacitance of 718.6 F g −1 at a current density of 1 A g −1 , with 92.6% capacitance retention after 1000 cycles. The hierarchical 3D structured Cu/MnC x -rGO nanocomposite has unique chemistry, high surface area, and high electrical conductivity, and hence ensures rapid ion and electron transport beneficial to both pseudocapacitive and double-layer capacitive performance.
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RSC Advances
·
2024
·Vol. 14
·期 28
·20199-20209
·
IF 3.9
Yaping She,Xinyu Chen,Mengya Wang,Anqiu Liu,Xiaochen Wang,Daming Gao,Kunhong Hu,Miao Hu
Heterogeneous solvent-metal-free aerobic oxidation of alcohols under ambient conditions is interesting but remains a significant challenge. Herein, a series of porous TEMPO-functionalized poly(ionic liquid)s (TEMPO-PILs) featuring a pure polycationic framework were successfully developed through the free radical polymerization of the ionic liquid 3-(2-chloroacetic acid-2,2,6,6-tetramethyl-1-oxo-4-piperidyl)-1-vinylimidazolium chloride and bis-vinylimidazolium bromide salt. Characterizations revealed that the obtained TEMPO-PILs possessed a high TEMPO density, abundant bromide ions, and a tunable porous structure, which enabled them to serve as solvent-free heterogeneous organocatalysts for the metal-free aerobic oxidation of benzyl alcohol under ambient conditions, exhibiting high catalytic activity and stable recyclability. A high yield of 99% coupled with a turnover frequency (TOF) of 13.3 h−1 was obtainable, which is higher than most of the reported TEMPO-based heterogeneous catalysts, even superior to homogeneous TEMPO-functionalized ionic liquids. Furthermore, a broad range of alcohols were effectively converted into their corresponding ketones and aldehydes. A possible reaction mechanism is proposed for understanding the catalytic oxidation behavior, indicative of the synergistic effect of TEMPO moieties and bromide ions.
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PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
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IF 4.4
Yaojie Yan,Xiaozhi Zhang,Yi Wang,Shenghua Xue,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Recently, a variety of functionalization methods have emerged to enhance the application efficiency of covalent organic frameworks (COFs) across diverse fields. Herein, poly(ionic liquid)-functionalized COF-LZU1 was successfully synthesized via a mechanochemical reaction followed by surface-initiated ring-opening metathesis polymerization (SI-ROMP). At first, a ROMP initiator (5-norbornene-2-methylamine) was grafted onto the aldehyde-terminated COF-LZU1 via Schiff base reaction induced by mechanical force input through ball milling; subsequently, the ionic liquid monomer (NM-MIm-PF6) can grow onto the surfaces of COFs from the active sites of the initiator through SI-ROMP, resulting in the formation of a poly(ionic liquid)-functionalized COF (PNM-MIm-PF6@LZU1). The as-prepared PNM-MIm-PF6@LZU1 exhibited outstanding tribological performance when served as an oil-based lubricant additive. Compared to base oil 500SN, the average friction coefficient of the lubricant with PNM-MIm-PF6@LZU1 decreased from 0.162 to 0.105, accompanied by a 74.3% reduction in wear volume. The excellent lubricating performance is mainly attributed to the formation of a continuous and tough friction protective film through tribochemical reaction on the friction interface.
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FOOD CHEMISTRY
·
2024
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IF 8.5
Shengman Zhang,Wenxiu Zhou,Xiaoyuan Lv,Bingjie Li,Xin Wang
S-nitrosoglutathione (GSNO) is the most important S-nitrosothiol in vivo, which could affect the quality of meat by participating in calcium release, glucose metabolism, proteolysis and apoptosis, therefore may potentially serve as a marker for meat freshness. In this work, a solid-phase extraction (SPE) monolithic spin column modified with gold nanoparticles was prepared for GSNO extraction. The optimized SPE-LC-MS/MS method for GSNO quantification displays low limit of detection (0.01 nM), good precision (RSD < 15 %) and acceptable recovery (> 77.7 %). Furthermore, this approach has been applied to monitor GSNO levels in beef and pork stored at −20 °C for different days, showing that endogenous GSNO level increases during prolonged storage and could be employed as a marker to evaluate the freshness of ice stored meat. Additionally, the monolithic spin column remains in good quality after a half-year storage, which is promising to develop into commercial enrichment kit for endogenous GSNO analysis.
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