Polymer Chemistry
·
2016
·Vol. 7
·期 7
·1468-1474
·
IF 5.687
Ze Zhang,Zi-Bin Tan,Chun-Yan Hong,De-Cheng Wu,Ye-Zi You
Reactions combining two or more multicomponent reactions performed sequentially in a single pot have attracted great interest due to the fact that they enable more step- and time economic conversions of simple starting materials into complex targets. However, so far, no such reaction has been applied in the synthesis of topologically different polymers. Here, we first report a novel strategy combining the sequential multicomponent reaction (MCR) of a primary amine, a thiolactone and an alkene and the multicomponent polymerization (MCP) of an azide, an alkyne and a secondary amine in one-pot for the syntheses of topologically different polymers (linear, hyperbranched, core–shell polymers). This strategy provides an effective method that can control the sequence and topology of the obtained polymers simultaneously.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yihao Zhao,Bingzhu Wang,Qimin Fang,Songyang Wu,Yuan Ma,Changxiang Xie,Haiwang Wang
To achieve efficient photocatalytic degradation of multi-component wastewater, the solvothermal method was employed to synthesize g-C 3 N 4 /BiOBr, leading to a homogeneous encapsulation of lamellar g-C 3 N 4 around the flower-like spherical BiOBr structure. In this work, the control of the temperature and the composition ratio during the solvothermal process was used to achieve the modulation of the g-C 3 N 4 /BiOBr microscopic morphology and enhance the photocatalytic activity, and the mechanism of the evolution of its microstructure and photocatalytic activity was elucidated. Moreover, the electron transport bridge between heterojunctions was constructed by introducing metal Pd, which further reduced the probability of photogenerated electron-hole complexation, leading to a higher photocatalytic performance. The elimination rates of RhB, Cr(VI), and TCH of g-C 3 N 4 /Pd/BiOBr under the irradiation of visible light were 99.74 %, 89.20 %, and 44.62 %, respectively, which achieved efficient elimination of a wide range of pollutants. Besides, the carrier transport mechanism in g-C 3 N 4 /Pd/BiOBr heterojunction was proven to Z scheme, which mainly induced the complexation of e - in the conduction band of BiOBr and h + in the valence band of g-C 3 N 4 , which provided higher energy for oxidation and reductive degradation. This work provides an important reference for the research focusing on photocatalyst design and sewage treatment.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Junwen Qi,Guoping Wei,Yubo Yan,Xiuyun Sun,Lianjun Wang,Jiansheng Li
Protecting the staff on site from exposure risk to toxic industrial chemicals (TICs) in an efficient way is of great significance. However, simultaneous removal of multicomponent TICs with different physical and chemical properties is a challenge for porous carbon materials. In this work, Cu-carbon beads with tailored porous structure and chemical property were synthesized via phase inversion-carbonization (PIC) route. The in-situ introduction of copper species was accomplished via coupling solidification-reduction of copper species and PIC process. The obtained Cu-carbon beads possessed uniform spherical shape (Φ1.3 mm) with good mechanical strength, developed porous structure and abundant chemical groups. Three kinds of TICs with different chemical properties, i.e. benzene (nonpolar), ethanol (polar) and H 2 S (inorganic), were selected as probes to evaluate the simultaneous elimination performance of Cu-carbon beads. The optimized Cu-beads-3 exhibited excellent performance for multicomponent TICs with capacities of 491.9 mg benzene/g, 192.1 mg ethanol/g and 76.2 mg H 2 S/g, representing 74.0, 60.3 and 99.2% capacities compared with monocomponent TICs. The enhanced adsorption of H 2 S were ascribed to chemisorption of copper species and basic groups on Cu-carbon beads. These results indicated that Cu-carbon beads would be a promising candidate for the simultaneous elimination of TICs with different chemical properties.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Hongwei Chen,Xiangqiong Jiang,Binyu Wang,Yongheng Ren,Bin Zhang,Jiabao Gui,Xili Cui,Linbing Sun,Jiuxing Jiang,Wenfu Yan,Jinping Li,Libo Li
Utilizing physical adsorption for ethylene purification from complex mixtures can significantly reduce the energy cost for production. The purification of multi-component systems through a single adsorption process presents a considerable challenge, largely stemming from the absence of customized strategies and thorough investigations into adsorption behaviours. We aim to understand adsorbents through a unique cage recognition approach and leverage these insights to develop an effective purification adsorbent, with the successful synthesis of SSZ-16 zeolite meeting requirements for multi-component purification. This zeolite, featuring a long aft supercage and a narrow gme cage construct two adsorption cages. The dense π -electron cloud of C 2 H 2 enables a stronger interaction in aft cage, while CO 2 is selectively captured within the environmentally compatible gme cage, demonstrating significantly higher C 2 H 2 and CO 2 adsorption capacity. The separation experiments reveal that SSZ-16 exhibits exceptional performance, with an unprecedented polymer-grade C 2 H 4 productivity of 2099.16 L/kg from the CO 2 /C 2 H 2 /C 2 H 4 mixture.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2018
·Vol. 9
·期 13
·1674-1683
·
IF 4.927
Liguo Xu,Fan Zhou,Min Liao,Rongrong Hu,Ben Zhong Tang
The development of a new polymerization methodology affords polymer materials with new structures and functionalities. Multicomponent polymerizations (MCPs) as a facile tool for preparing multifunctional polymers with complicated structures have attracted increasing attention from polymer scientists, owing to their high efficiency, high atom economy, simple procedure, structural diversity, and environmental benefit. In this work, a series of efficient one-pot multicomponent polymerizations of diynes, disulfonyl azides, and N-protected isatins are developed to afford oxindole-containing poly(N-acylsulfonamide)s with advanced properties. After optimization of the polymerization conditions, the MCP can proceed smoothly at room temperature or 30 °C in dichloromethane/t-BuOH with CuI as the catalyst and LiOH as the base, generating poly(N-acylsulfonamide)s with high molecular weights of up to 30 600 g mol−1 in excellent yields of up to 98%. This MCP enjoys general applicability of a series of electron-rich or electron-deficient alkynes and alkyl group or aromatic group-substituted isatins, generating six poly(N-acylsulfonamide)s from different combination of monomers, and nitrogen gas as the only byproduct, demonstrating high atom economy and environmental benefit. The obtained poly(N-acylsulfonamide)s can be dissolved in alcohol or alcohol/water mixtures, but cannot be dissolved in THF or dichloromethane, which show opposite solubility after the polymers are acidified with HCl, indicating reversibly tunable hydrophilicity of the polymers. Furthermore, water can participate in the MCP as the fourth component when the MCP is conducted in DMF with CuI as the catalyst and Na2CO3 as the base, generating random copolymers consisting of 3-alkenyloxindole moieties and two chiral center-containing 3-hydroxyindole moieties in the backbone. Some of the oxindole-containing poly(N-acylsulfonamide)s exhibit yellow to red emission in their solid state. These MCPs provide an efficient approach for the synthesis of functional polymers with unique structures, which directly build the oxindole and N-acylsulfonamide moieties in situ, demonstrating high synthetic efficiency.
研究领域:
材料科学
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高分子化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
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2024
·
IF 5.7
Yunyun Ao,Xinyi Ling,Jinyu Zheng,Min Han,Dongdong Xu
In the realm of traditional electrocatalytic processes, the benefits of composition and two-dimensional ultrathin morphology have not often been explored in the context of multicomponent palladium-based nanosheets . In this work, we utilize a one-step solvothermal method to create nanosheets of a multicomponent alloy (PdPtMoCrCoNi NSs). The synthesis involves no surfactants, allowing for the exposure of more active sites or surface atoms. The resulting PdPtMoCrCoNi NSs exhibits outstanding performance in the electrooxidation of ethylene glycol under alkaline conditions, demonstrating high mass activity (10.12 A mg Pd+Pt −1 ), good stability, and enhanced anti-poisoning ability. The incorporation of more low-cost alloyed elements not only reduces the overall cost of electrocatalysts but also effectively tailors the electronic state to enhance the corresponding electrocatalytic performance.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 74
·69909-69918
·
IF 3.289
Wentong Song,Shengyang Tao,Yongxian Yu,Xuanlu Du,Shuo Wang
This article reports a facile synthetic approach for preparing magnetic porous catalysts, on which various inorganic compounds are alternately loaded using a pyrogallic acid (PG)-assisted layer-by-layer (LbL) coating. The PG forms an adhesion and reductive layer on the surface of hierarchically porous silica, and Pd, Al2O3, ZrO2, or FeOx can then be introduced on the surface of the material. Compared with the conventional impregnation method, the PG layer obviously improves the dispersion of catalysts and greatly reduces the blocking of the pores, which is caused by the formation of metal oxide catalysts. At the same time, the reduction properties of the layer help to reduce the diameter of the Pd nanoparticles to 5 ± 1.3 nm. The Fe3+ ions are partially reduced into Fe2+ by the PG layer to form Fe3O4, which endows the porous catalysts with a magnetic separation property. The synthesized multicomponent catalysts show excellent catalytic activity for various reactions, including the Suzuki Miyaura coupling, reduction, Knoevenagel condensation and Friedel–Crafts alkylation reactions. The TOF values show an improvement of 2 to 4 times over those of the catalysts prepared by the traditional impregnation method. The multicomponent magnetic catalysts also exhibit superior catalytic performance for many one-pot multistep cascade reactions.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
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2025
·
IF 3
Zhou Meng-ran,Sun Wan-chang,Liu Er-yong,Xiao Yan,Xu Yi-fan,Zhang Bo,Jia Tian-ze,Cai Hui,Zhang Jing-li
With the emergence of 5th Generation Mobile Communication Technology, the global demand for high volume low pressure (HVLP) copper foil is experiencing continuous growth. In order to obtain HVLP copper foil with excellent performance, it is crucial to reconcile the contradiction between low profile and high peel resistance. Additives play a pivotal role in determining the quality of copper foil. Sodium phenyldithiopropane (BSP), 3,3′-Dithiobis-1-Propanesulfonic Acid Disodium Salt (SPS), Hydroxyethyl cellulose (HEC), and Gelatin are common additives that can function independently or synergistically with each other. Therefore, it is imperative to explore an improved combination of additives that can enhance the electrolysis process of copper foil. This paper investigates a novel multi-component additive formulation using orthogonal experimental design. The effects of composite additive combinations including SPS + HEC + Gelatin (SHG), BSP + HEC + Gelatin (BHG), and BSP + SPS + HEC + Gelatin (BSHG) on the morphology and performance of the coarsening layer in copper foil were examined. Among these combinations, BSHG-5 (20 mg L −1 BSP, 40 mg L −1 SPS, 7 mg L −1 HEC, 20 mg L −1 gelatin) exhibited optimal results. Under this composite additive system, copper particles were uniformly and finely deposited in the coarsened layer, resulting in significantly enhanced peel strength (0.72 N mm −1 ) and favorable surface roughness. Graphical abstract
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
·
IF 4.1
Zeyu Jin,Yuelin Wang,Linshan Zhu,Jingzi Zhang,Xi Lin
Oxygen evolution reaction (OER) plays an important role in the energy conversion industry. Despite the prevalent reliance on noble metals for their superior catalytic attributes, their high cost and limited availability present significant challenges. Reducing the use of noble metals in catalysts while maintaining catalytic activity and stability in various chemical environments is a major challenge in heterogeneous catalysis. In this study, we have strategically enhanced the catalytic performance of the Cr 2 O 3 oxide by introducing multiple transition metal dopants to modulate its electronic structure. It is found that doping Ni/Co/Cu/Ru into the Cr 2 O 3 oxide results in the best OER performance, which outperforms RuO 2 and other reported materials. We further improved the cycling stability of the multi-component catalyst by coating amorphous carbon on its surface. Specifically, with an OER overpotential of merely 210 mV at 10 mA cm −2 and a low Tafel slope of 59.5 mV dec −1 , the catalyst exhibits remarkable catalytic efficiency. More importantly, it can withstand high current tests exceeding 100 mA cm −2 for over 80 h without significant degradation of its OER catalytic performance. In addition, the catalyst exhibits exceptional hydrogen evolution reaction (HER) performance which is close to Pt/C, making it suitable for use as a bifunctional water splitting device. These findings have opened up a new field for the design and application of multi-component catalysts.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2018
·
IF 0
You Zhou,Shenglong Liao,Xinglei Tao,Xiao-Qi Xu,Quan Hong,Di Wu,Yapei Wang
The shortage of tissue resources is currently a serious challenge that limits the clinical therapy to patients with tissue loss or end-stage organ failure. The booming development of 3D printing offers unprecedented hope for tissue engineering since it can construct cells and biomaterials into a 3D tissue-mimicking object with precise control over size and shape. However, it is still challenging to fabricate artificial living tissues or organs due to the extreme complexity of biological tissues. Herein, we propose a new concept of spider-inspired 3D printing technique (SI-3DP) for continuous multicomponent 3D printing based on in situ gelation at a multibarrel printing nozzle. The printing process allows for rapid construction of 3D architectures composed of different inks in the desired position. To present the potential in biomedical applications, the SI-DIP also prints vessel-like hollow hydrogel microfibers and cell-laden hollow fibers, indicating good biocompatibility of this technique. The newly developed SI-3DP technique is envisioned to promote the development of next-generation complex biofabrication.
研究领域:
生物医学工程
·
组织工程
·
再生医学
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 21
·8720-8733
·
IF 3.9
Zhang Wen-hua,Yi Bing,He Wen-xin,Ma Xiu-jia,Jia Yun-bo,Li Shi-qi,Guo Cai-wen,Wang Xue-wei
Industrial catalysts for the oxygen evolution reaction (OER) of water electrolysis are key to realizing green and clean hydrogen production. In this study, multivariate transition metal hydroxide catalysts with high-entropy structure were prepared, which exhibited optimized electrocatalytic performance and stability for water splitting in alkaline media. Using copper foam as the substrate, samples are obtained through the step-by-step combination and tuning of the multi-components. The electrochemical performance test results show that the optimized FeCoCuMoMnOOH catalyst exhibits an exceptional catalytic effect for the OER with an overpotential of 227 mV at a current density of 100 mA/cm 2 , much superior to the performance of FeCoCuOOH and FeCoCuMoOOH. In the 30-h timed current method test, the performance of the FeCoCuMoMnOOH catalyst is essentially non-decaying and shows good stability. The XPS results indicate that the metal components are stably combined to exist as a mixture of metal phases in the samples, which exerts a beneficial synergistic effect and offers more active sites. Meanwhile, Mn as an electron donor can increase the electron density and optimize the electron transport structure, which is conducive to the electrochemical reaction rate. This work sheds light on presenting an effective strategy for constructing multi-element high-entropy combinations with modulated component ratios, which provides a new idea for designing efficient and stable transition metal hydroxyl oxide catalysts. Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2021
·
IF 3.531
Shuhang Tian,Yipeng Lun,Yongsheng Sun,Dongdan Chen,Guowu Tang,Qi Qian,Zhongmin Yang
In this work, strong yellow emission was obtained in Dy 3+ doped multi-component phosphate glass due to its high asymmetry and covalency of the local field and high phonon energy. The internal quantum efficiency was measured to be 39.27% and the figure of merit was calculated to be 210.53 pm 2 × μs. What is more, silicate-clad Dy 3+ doped multi-component phosphate core glass fiber was successfully drawn by using a rod-in-tube method, which has a strong fluorescence emission in yellow spectra band. The Dy 3+ doping concentration is 2.6 wt.%, which is much larger than that of Dy 3+ doped (0.2 wt.%) ZBLAN fiber. These results suggest that the silicate-clad Dy 3+ doped multi-component phosphate glass fibers are potential host matrices for yellow laser.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）