IONICS
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2022
·Vol. 28
·期 5
·2377-2388
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IF 2.961
Wang Shuangyu,Li Jinde,Ke Yihu,Wei Yelin,Wang Dewei
Heteroatoms co-doped porous carbon attracts tremendous research interest for electrochemical energy storage applications. We demonstrate herein N/S co-doped 3D carbon frameworks with the large specific surface area through KOH activation in the presence of KSCN by utilizing red bean as the precursor. We found that KSCN can not only act as the N/S sources but also serve as the co-activator to generate nanopores. Benefitting from its large specific surface, hierarchical porosity, and N/S co-doping, the largest specific capacitance can be reached 293.4 F g −1 (at 0.5 A g −1 ) and satisfactory rate capability of 68% (at 50 A g −1 ) in 6 M KOH aqueous electrolyte. Encouragingly, a high-energy density achieves to 23.025 Wh kg −1 can be obtained and in Na 2 SO 4 /PVA gel electrolyte within the voltage window of 0–1.8 V. The quasi-solid-state supercapacitor could also be connected in series or parallel to further enhance the working voltage or current.
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CHEMOSPHERE
·
2022
·
IF 8.943
Di Liu,Yunning Chen,Renquan Guan,Jie Zhao,Huimin Jin,Siyi Zhang,Qingkun Shang
In this paper, a type of heterojunction photocatalyst S-Tyr-NDI-Tyr/TiO 2 was prepared by self-assembly of tyrosine-substituted naphthamide (NDA) and bonding with titanium dioxide. The self-assembly process and driving force of monomer M-Tyr-NDI-Tyr were simulated by theoretical calculation. Taking atenolol as the target pollutant, the photocatalytic performance of the heterojunction photocatalyst under visible light was studied, and the degradation products were analyzed by mass spectrometry. The environmental toxicity of photocatalytic process was evaluated by luminescent bacteria. The principle of high photocatalytic activity of S-Tyr-NDI-Tyr/TiO 2 heterojunction photocatalyst was proposed by analyzing the fluorescence spectrum, photocurrent density and resistance, electron paramagnetic resonance spectrum, free radical capture experiment and energy band position of S-Tyr-NDI-Tyr/TiO 2 heterojunction photocatalyst. In addition, the photocatalytic degradation of different pollutants by S-Tyr-NDI-Tyr/TiO 2 heterojunction photocatalyst was also studied. This work will provide a useful example for the further development of new and efficient organic supramolecular/inorganic semiconductor composite photocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Meng Zhu,Dong-Xing Tan,Xiang-Yu Wang,Qing-Nan Bian,Ben-Shuai Guo,Yan-Min Liu,Gao Deng,Yuan-Yuan Feng
Water electrolysis to produce high-purity hydrogen has been regarded as the most promising and attractive method for renewable energy production. The intrinsic high kinetic barrier of the involved electrode reactions, especially that of the anodic oxygen evolution reaction (OER), however severely hinders the application of the water electrolysis technology for large scale hydrogen production. In this paper, a nano-composite Fe- and Co-based material containing crystalline metal sulfide ((NiFeCo)S) and amorphous metal phosphide ((FeCo)P) was in-situ grown on the surface of foam nickel (NF). The (FC)P-(NFC)S/NF catalyst exhibits ultra-high activities for OER at high current densities in 1.0 M KOH, delivering 500 and 1000 mA cm −2 at ultralow overpotentials of 274 and 280 mV, respectively with a small Tafel slope of 37.8 mV dec −1 . The excellent catalytic activities of (FC)P-(NFC)S/NF far exceed those of the reference single-component (FC)P/NF and (NFC)S/NF catalysts, and also exceed those of most non-noble metal catalysts reported in literature. Besides, the (FC)P-(NFC)S/NF catalyst exhibits high stability with almost no significant activity attenuation after the chronopotentiometric test at both 100 and 500 mA cm −2 for 40 h. The synergistic effects between the metal sulfide and metal phosphide have positive impacts on the OER activity through increasing the surface area, enhancing the reactivity of each active site, improving the electrical conductivity as well as the interface between the crystalline and amorphous phases. The present work provides a new strategy to develop cost-effective and efficient electrocatalysts toward OER and water electrolysis.
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MATERIALS CHEMISTRY AND PHYSICS
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2023
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IF 4.6
Jiang Cheng,Zhen Zhang,Minghao Zhao,Youwei Guan,Xihao Chen,Xiang Meng,Hua Tang,Lu Li,Shenghao Wang
CdS films prepared via chemical bath deposition exhibit extremely good performance as a buffer layer of chalcogenide solar cells. However, their commercial application is very limited because of the production of a large amount of wastewater containing cadmium. In this study, we develop an efficient way to prepare CdS films using the spin-coating technique. The spin solution is anhydrous, and the oxygen content can be well controlled by changing the Cd/S content ratio in the solution. The crystal structure, morphology, and optical and electrical properties of CdS films with different Cd/S content ratios are characterized. The effect of the oxygen content on the device performance is investigated. We find that the introduction of an appropriate amount of oxygen can improve the carrier transport efficiency by decreasing the interface recombination. The spin-coated CdS films have good coverage of the substrate for film thicknesses below 50 nm. By the optimizing of Cd/S content ratio, we achieve an improved efficiency of 5.76% for the Sb 2 Se 3 solar cells. This preparation technique is sufficiently simple for large-scale processing and produces much less wastewater containing cadmium; thus, it is promising for application to future large-scale solar cell production.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xianwei Geng,Chenguang Liu,Yi Sun,Yingchao Zhao,Ruowei Yi,Pengfei Song,Chun Zhao,Ivona Mitrovic,Li Yang,Cezhou Zhao
Lithium-sulfur (Li-S) batteries hold their promise in renewable next-generation energy storage technologies due to low cost and high theoretical energy. Herein, a Ti 3 C 2 T x MXene-carbon nanocage-sulfur (MXene/CNC/S) cathode is synthesized by a simple process with high conductivity and outstanding performance in Li-S batteries. The cathode with an unusually high sulfur content of 80% demonstrates an eminent initial specific capacity of 1275.5 mAh·g −1 at 0.1 C and retains 823.8 mAh·g −1 after 100 cycles, showing a high retention rate of 64.6%. Besides, it exhibits a great conductive feature for rate performance, delivering 630.5 mAh·g −1 capacity when the current rises to 4 C. In this composition electrode, the excellent electrochemical performance indicates that MXene can effectively adsorb polysulfides to help batteries achieve long-term cyclic performance. On the other hand, the introduction of CNC strongly improves the specific surface area of the cathode and constructs a high conductive network to reduce the stacking of MXene, thus exhibiting better rate performance and increasing utilization of sulfur. Our work holds future technological significance as it could accelerate progress towards lithium-sulfur batteries with high sulfur content and less pricy conductive materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Zhendong Yu,Jiachen Ma,Xiaoyi Huang,Yuancai Lv,Yifan Liu,Chunxiang Lin,Rongni Dou,Xiaoxia Ye,Yongqian Shi,Minghua Liu
In this study, the S modified iron-based catalyst (S-Fe@C) for activating peroxydisulfate (PDS) was fabricated by heating the S-MIL-101 (Fe) precursor at 800 °C. The resulted S-Fe@C composite mainly consisted of carbon, Fe 0 , FeS, FeS 2 , and Fe 3 O 4 , and showed strong magnetism. Compared with Fe@C obtained from MIL-101 (Fe), the S-Fe@C exhibited much higher performance (1.5 times larger) on PDS activation and the S-Fe@C/PDS could rapidly degrade various organic pollutants in 5 min under the attack of the species of SO 4 - · , 1 O 2 , electro-transfer and Fe(IV). The S element in enhancing the PDS activation mainly involved two mechanisms. Firstly, the doped S could speed up the electron transfer efficiency, resulting in a promotion on PDS decomposition; secondly, the S 2- S 2 2- or S 0 could achieve the circulation of Fe 2+ and Fe 3+ , leading to the formation of non-radicals Fe(IV) and 1 O 2 .
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 2
·877-882
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IF 3.591
Pengfei Fan,Can Liu,Congcong Hu,Feifei Li,Xi Lin,Fubing Xiao,Hao Liang,Le Li,Shengyuan Yang
Nitrogen and sulfur co-doped carbon dots (N,S-CDs) with strong orange fluorescence were fabricated through a facile hydrothermal method using o-phenylenediamine and thiourea as precursors. The N,S-CDs exhibited excitation-independent photoluminescent behavior with excellent stability. The largest emission peak at 565 nm occurred at an excitation wavelength of 420 nm, and the quantum yield (QY) was 14.3%. It was found that the absorption spectra of vitamin B12 (VB12) overlaps with the emission peak of the N,S-CDs to a large extent, and based on the inner filter effect (IFE) between VB12 and N,S-CDs, a label-free and sensitive detection method of VB12 in drugs was established. Under optimal conditions, the concentration of VB12 exhibited a satisfactory linear correlation with the fluorescence quenching degree ΔF/F0 of the reaction system at 565 nm in the range of 0.25–20 μM, and the detection limit was 77.5 nM. The N,S-CDs with orange fluorescence emission show huge potential for use in the field of biological analysis.
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PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Xiaojing Sun,Hang Li,Liujie Qi,Fei Wang,Yachen Hou,Jingan Li,Shaokang Guan
In recent years, functional molecules such as metal-organic frameworks (MOFs), hyaluronic acid (HA) and heparin have been widely studied in the field of surface modification of cardiovascular and cerebrovascular implant materials . However, magnesium (Mg) alloy scaffolds, which are used as implanted materials, have difficulties such as poor cell compatibility, insufficient endothelialization, and remodeling of the blood–brain barrier. In this study, MOF-Cu formed after chelating organic ligand catechol (HPT) and Cu(II) was coated by Sulfonated hyaluronic acid (S-HA) on the surface of ZE21B Mg alloy to form a composite coating , which not only inherited the excellent anticoagulant and anti-inflammatory properties of S-HA, but also significantly improved the bio-compatibility of the coating by reasonably regulating the concentration of Nitric oxide (NO) catalytic release, promoted the proliferation, migration and expression of specific factors in endothelial cells (ECs), regulated the transformation of smooth muscle cells (SMCs) to contractile phenotypes. And it has important and remarkable performance in promoting the transformation of macrophage (MA) into anti-inflammatory M2 phenotype. These results provide important research strategies for Mg alloy vascular stents materials in remodeling blood–brain barrier, relaxing cerebrovascular vessels, inhibiting inflammatory responses, and maintaining cardiovascular and cerebrovascular elasticity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Xiangyu Chen,Jiahua Ma,Xiaoshuai Sun,Chuanshan Zhao,Jiehua Li,Hui Li
The rational design of porous carbon materials and hydrogel electrolytes with excellent mechanical properties and low-temperature tolerance are significance for the development of flexible solid-state supercapacitors. In this study, we introduce a novel methodology for synthesizing SiC/N, S-doped porous carbon nanosheets from bamboo pulp red liquor (RL). We leverage the SiO 2 and the sodium salt in RL as templates and sodium lignosulfonate as sulfur dopants for the pyrolysis process and use NH 4 Cl as a nitrogen dopant. This innovative approach results in a material with a remarkable specific surface area of 1659.19 m 2 g −1 , a specific capacitance of 308 F g −1 at a current density of 1 A g −1 and excellent stability. Additionally, we harness alkali lignin extracted from RL to enhance a poly (vinyl alcohol) (PVA) matrix, creating a gel electrolyte with low-temperature tolerance and outstanding mechanical properties. A flexible solid-state supercapacitor, which incorporates our electrodes and gel electrolyte, demonstrates high energy density (5.2 W h kg −1 at 251 W kg −1 power density). Impressively, it maintains 82 % of its capacitance over 10,000 cycles of charge and discharge. This provides a new solution for the development of flexible solid-state supercapacitors.
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CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Kui Chen,Chunhui Xie,Bangyu Zhao,Yongzhen Xu,Fangzhou Dai,Yuanlong Guo,Qinqin Xu,Haibo Xie
A zwitterionic cellulose poly(ionic liquid) additive enables electrostatic shielding and preferential adsorption to stabilize Zn anodes. • Zn||Cu half-cells deliver 99.75% average CE over 2,792 cycles at 10 mA cm -2 . • Zn||Zn symmetric cells achieve an ultralong lifespan of 3,160 h at 0.5 mA cm -2 . • Zn||NVO full cells retain 82.4% capacity after 500 cycles at 1 A g -1 and suppress vanadium dissolution. Aqueous zinc-ion batteries (AZIBs) face formidable barriers including uncontrolled dendrite growth, severe corrosion, hydrogen evolution, and inhomogeneous Zn 2+ deposition. To overcome these challenges, this work develops an innovative zwitterionic cellulose poly(ionic liquid)s (ZC-PILs) electrolyte additive leveraging the DBU/CO 2 /DMSO solvent system. The ZC-PILs synergistically combines electrostatic shielding from [Mim] + moieties and self-adsorption of −COOH groups to stabilize Zn anodes. Unprecedented electrochemical performance is demonstrated by an average CE of 99.75% over 2792 cycles for Zn||Cu cells at 10 mA cm −2 and stable operation for 3160 h for Zn||Zn symmetric cells at 0.5 mA cm −2 with a capacity of 0.5 mAh cm −2 . Interfacial and electrochemical analyses reveal preferential Zn(002) deposition, the formation of ZnS-ZnF 2 -rich SEI layers, and improved electrochemical stability of NH 4 V 4 O 10 cathodes in ZC-PILs-containing electrolytes. Consequently, Zn||NVO full cells retain 82.4% capacity after 500 cycles at 1 A g −1 with 92.94% CE and minimal self-discharge. This work demonstrates a multifunctional additive strategy for suppressing dendrite growth and improving the stability of zinc batteries. Cellulose-based zwitterionic poly(ionic liquid)s (ZC-PILs) simultaneously regulate Zn 2+ transport and the Zn/electrolyte interface through imidazolium-mediated electrostatic modulation and carboxyl-group-assisted preferential adsorption. This dual-function interfacial regulation homogenizes Zn 2+ flux, suppresses parasitic reactions and dendrite growth, and enables highly reversible, ultralong-cycling Zn anodes. Download: Download high-res image (215KB) Download: Download full-size image
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.3
Ma Yong-hu,Ma Fu,Zhao Tiao-bin,Gao Zi-yi,La Ying-hong,Zhao Hong-jian
Limited interfacial charge separation efficiency and insufficient redox capacity severely hinder the practical application of conventional Bi 2 WO 6 -based photocatalysts. To address these issues, a novel Bi(C 2 O 4 )OH/Bi 2 WO 6 heterojunction was constructed via a facile room-temperature one-pot liquid-phase deposition method. Multiple characterizations confirm the intimate interfacial contact between Bi(C 2 O 4 )OH nanorods and uniformly anchored Bi 2 WO 6 nanoparticles, accompanied by the introduction of abundant oxygen vacancies. On the basis of radical trapping experiments, EPR measurements, and electrochemical tests, an S-scheme charge-transfer model is proposed. This model retains the strong redox potentials of both semiconductors, while oxygen vacancies are speculated to act as efficient interfacial charge-trapping and transfer sites to synergistically promote the migration and separation of photogenerated carriers. The optimized 7%Bi(C 2 O 4 )OH/Bi 2 WO 6 composite achieves an RhB removal efficiency of 97.6% within 60 min for 50 mL of RhB solution (30 mg·L -1 ) under 5-W LED lamp irradiation. Radical trapping and EPR tests confirm that ·O 2 - , h⁺, and ·OH are the dominant active species. This work presents a facile and efficient room-temperature fabrication strategy for Bi-based heterojunctions and systematically elucidates the synergistic promotion mechanism between oxygen vacancies and the proposed S-scheme charge-transfer pathway, offering new insights for designing high-performance photocatalysts for organic wastewater remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhiliang Jin,Tian Wang,Entian Cui,Xiuli Yang
The construction of heterojunctions is often considered an effective strategy for achieving solar driven photocatalytic decomposition of water. Graphdiyne has unique properties such as highly π conjugated structure, ideal direct bandgap, and high charge carrier mobility, making it a candidate for ideal photocatalysts. In this work, a graphdiyne based composite catalyst GDY-Cu with ohmic contact interface was prepared through organic synthesis. Subsequently, a S-scheme heterojunction was constructed between the contact interface of WO 3 nanorods with surface defects and GDY-Cu samples to promote electron transfer. The hydrogen evolution ability of GDY-Cu/WO 3 samples with different ratios was studied by adjusting the addition amount of GDY-Cu. In addition, GDY-Cu/WO 3 samples exhibits the highest photocatalytic hydrogen evolution activity, reaching 12.2 times that of pure GDY. In fact, the joint construction of Ohmic junctions and S-scheme heterojunctions provides a unique transport pathway for electron transfer. The built-in electric field between interfaces provides power for electron migration. Importantly, in-depth research on in-situ XPS and density functional theory calculations has confirmed the charge transfer pathway. Thorough charge dynamics analysis of the migration ability of photo generated charge carriers. This work not only enriches the photocatalytic system by integrating Ohmic junctions and S-scheme heterojunctions, but also provides a new design strategy for constructing graphdiyne based materials.
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