CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhenpeng Liu,Zhe Chen,Jun Bu,Wenxiu Ma,Lei Zhang,Hong Zhong,Lin Cheng,Shuangming Li,Tao Wang,Jian Zhang
Compared to their booming thermocatalytic counterparts, electrocatalytic acetylene semihydrogenation still remain stagnant owing to its low activity and poor selectivity. Here, we first explore metal phthalocyanines (M(Pc)s) featuring a defined metal coordination environment as electrocatalysts for acetylene semihydrogenation. Consequently, CoPc exhibits an ethylene current density of 150.8 mA cm −2 and a ∼ 96% ethylene faradaic efficiency under a pure acetylene stream. In-situ electrochemical Raman and theoretical calculations demonstrate that CoPc favors acetylene absorption/hydrogenation processes. Even for crude ethylene containing 1 × 10 4 ppm acetylene, CoPc manifests a ∼ 99.5% acetylene conversion, a high turnover frequency of 4.86 × 10 –3 s −1 and a large space velocity of 2.4 × 10 5 ml·g cat –1 ·h −1 , outperforming those for reported thermocatalysts. This work facilitates the development of electrocatalytic acetylene semihydrogenation and promises alternatives to traditional thermocatalytic processes.
研究领域:
化学
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材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Zhijiao Liu,Qinqin Jiang,Ronglan Zhang,Ruimin Gao,Jianshe Zhao
ABSTRACT Two new series of binuclear metal phthalocyanines and graphene/phthalocyanine composites (M 2 (PcTN) 2 C(CF 3 ) 2 , M 2 (PcTA) 2 C(CF 3 ) 2 , M 2 (PcTN) 2 C(CF 3 ) 2 -Gr and M 2 (PcTA) 2 C(CF 3 ) 2 -Gr, M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)) were synthesized and developed for high efficient catalysts to Li/SOCl 2 battery . All the catalysts were characterized by IR, LRS, SEM , XRD, TEM and TGA . The capacity of the battery containing these catalysts increases by approximately 4.651-83.72% than that of the battery without them. Especially capacity of Fe 2 (PcTA) 2 C(CF 3 ) 2 -Gr could increase by 83.72%. In addition, the catalytic activities between M 2 (PcTN) 2 C(CF 3 ) 2 and M 2 (PcTA) 2 C(CF 3 ) 2 , M 2 (PcTN) 2 C(CF 3 ) 2 and M 2 (PcTN) 2 C(CF 3 ) 2 -Gr, M 2 (PcTA) 2 C(CF 3 ) 2 and M 2 (PcTA) 2 C(CF 3 ) 2 -Gr, M 2 (PcTN) 2 C(CF 3 ) 2 -Gr and M 2 (PcTA) 2 C(CF 3 ) 2 -Gr were made a comparison. The results indicated that activities of the catalysts were related to both the phthalocyanines rings and the conjugative effect. According to the relevant CV results, reasonable catalytic mechanisms were confirmed to explain the catalytic process.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2015
·Vol. 30
·期 5
·645-653
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IF 1.647
Ruiqiong Wang,Ronglan Zhang,Bei Xu,Fei Yang,Jianshe Zhao,Shichao Zhang,Junlong Wang
Two novel series of cathode materials LiFe1−x Mx PO4/C (x ≈ 0.0040; M = Mn, Fe, Co, Ni, Cu, and Zn) composites based on metal phthalocyanines (MPc) and metal tetrasulfophthalocyanines (MPcTs) to modify lithium iron phosphate (LiFePO4) for lithium-ion batteries (LIBs) are in situ prepared by solvothermal and calcination techniques. Structures and morphologies of all the composites are characterized by normal methods. To evaluate the electrochemical performance of the composites, the charge/discharge capabilities, rate performance, cycling stabilities, cyclic voltammetry profiles, and electrochemical impedance spectroscopy plots of the LIBs using them as cathode materials are measured carefully. The results indicate that most of the composites deliver highly improved initial discharge capacity and show remarkable reversibility and cycling stabilities. Especially, composites using MPcTs as additives are more efficient for the improvement of specific capacity, rate capability, reversibility, and cycling stability.
研究领域:
材料科学
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电化学
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能源存储
·
纳米材料
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功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 7
·5789-5793
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IF 2.22
Zhai Zhichun,Xu Meifeng
Copper phthalocyanine (CuPc) and zinc phthalocyanine (ZnPc) were both widely used in small-molecule solar cells which were considered as promising materials for photovoltaic technology. However, all-solution-processed CuPc (ZnPc)-based devices are not be fully studied. The low solubility of CuPc and ZnPc causes a bad morphology of CuPc (ZnPc)/C60 films, which leads to an unsatisfactory power conversion efficiency (PCE). In this work, in order to prepare continuous CuPc (ZnPc)/C60 composite films by solution processing, C60 film was transferred onto the CuPc (ZnPc) surface to form CuPc (ZnPc)/C60 films by stripping-transfer method. Scanning electron microscopic (SEM) images of the prepared CuPc/C60 and ZnPc/C60 composite films show both continuous films were formed because of stripping-transfer method. The performance of the small-molecule solar cells prepared by stripping-transfer method was better than devices prepared by the traditional evaporation method with a device structure of ITO/CuPc (ZnPc)/C60/Carbon paste. Due to the strong optical absorption of ZnPc, the efficiency of small-molecule solar cells using ZnPc is higher than devices using CuPc, and the efficiency could reach 1.37%. What is more, other composite films can also be formed by this low cost and convenient method, which is suitable for commercialized solar cells.
研究领域:
材料科学
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光伏技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 28
·9858-9870
·
IF 4.39
Jianjun Zhao,Yong Xu,Jun Chen,Lihong Tao,Caixia Ou,Weixia Lv,Shengwen Zhong
A porous MA–VA–PcNi polymer was prepared by grafting nickel phthalocyanine (PcNi) onto the main chain of a maleic anhydride–vinyl acetate (MA–VA) polymer, and an MA–VA–PcNi electrode is prepared by electrospinning technology to inhibit the agglomeration of the active powder effectively, which produces spherical particles with a diameter of 100–300 nm. The synthesized MA–VA–PcNi polymer is used as the anode for lithium-ion and sodium-ion batteries, exhibiting excellent energy storage behaviors. The MA–VA–PcNi/Li battery displays a high capacity of 610 mA h g−1 and can still remain at 507 mA h g−1 with a retention rate of 83.1% after 400 cycles at a current density of 200 mA g−1. Even at a high current density of 2 A g−1, the specific capacity can remain at 195 mA h g−1. In addition, the MA–VA–PcNi/Na battery displays a high capacity of 336 mA h g−1 and can still remain at 278 mA h g−1 with a retention rate of 82.7% after 400 cycles at a current density of 100 mA g−1. A high specific capacity of 164 mA h g−1 can also be achieved at a high current density of 1 A g−1. After nickel phthalocyanine (PcNi) was grafted onto the MA–VA polymer, aggregation between phthalocyanine rings was effectively prevented, and this exposes more active sites. At the same time, the spherical particles obtained by electrospinning technology further improve the dispersion and increase the number of active sites of the active materials. Finally, the electrode materials show excellent energy storage behavior for lithium-ion and sodium-ion batteries, which provides a new idea for designing high-performance energy storage materials for organic electrodes.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 3
·904
·
IF 4.927
Gai Zhang,Yufan Zhang,Amin Tan,Yan Yang,Min Tian
Oxidative desulfurization (ODS) is the promising new method for super deep desulfurization of fuel oil. The oxidative desulfurization performance of the metal-N4-chelates metallophthalocyanines (MPcs) is related to the chemical properties of conjugate structures and the central metal ions. Herein, a biomimetic catalytic system composed of metallophthalocyanines (MPcR4, M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II); R = -H, -COOH, -NO2, -NH2) and molecular O2was performed to study the influence of MN4-type coordination structure in metallophthalocyanines for the degradation of dibenzothiophene (DBT) in model oil containing n-octane. The results reveal that the conjugate structures and the center metal ions of metallophthalocyanines played key roles in oxidative desulfurization performance. The inductive effect of different R substituents strongly affected the electron cloud distribution of the conjugate structures and the catalytic performance. Moreover, the catalytic activity of MPcs, which is related to the d electronic configuration and ligand-field effects, does not sequentially increase with the increase in the d electron number of central metal ions.Keywords:metallophthalocyanine;MN4-type coordination structure;desulfurization;O2
研究领域:
化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 9
·2218
·
IF 5.076
Binbin Wu,Yikai Sun,Qiujin Fan,Jiahui Chen,Weizheng Fang,Shiliang Chen
In this report, phthalocyanine (Pc)/reduced graphene (rG)/bacterial cellulose (BC) ternary nanocomposite, Pc-rGBC, was developed through the immobilization of Pc onto a reduced graphene–bacterial cellulose (rGBC) nanohybrid after the reduction of biosynthesized graphene oxide-bacterial cellulose (GOBC) with N2H4. Field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FT-IR) were employed to monitor all of the functionalization processes. The Pc-rGBC nanocomposite was applied for the treatment of phenol wastewater. Thanks to the synergistic effect of BC and rG, Pc-rGBC had good adsorption capacity to phenol molecules, and the equilibrium adsorption data fitted well with the Freundlich model. When H2O2was presented as an oxidant, phenol could rapidly be catalytically decomposed by the Pc-rGBC nanocomposite; the phenol degradation ratio was more than 90% within 90 min of catalytic oxidation, and the recycling experiment showed that the Pc-rGBC nanocomposite had excellent recycling performance in the consecutive treatment of phenol wastewater. The HPLC result showed that several organic acids, such as oxalic acid, maleic acid, fumaric acid, glutaric acid, and adipic acid, were formed during the reaction. The chemical oxygen demand (COD) result indicated that the formed organic acids could be further mineralized to CO2and H2O, and the mineralization ratio was more than 80% when the catalytic reaction time was prolonged to 4 h. This work is of vital importance, in terms of both academic research and industrial practice, to the design of Pc-based functional materials and their application in environmental purification.Keywords:bacterial cellulose;graphene;phthalocyanine;phenol;degradation
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Guoquan Liu,Yong Zhu,Hua Gao,Suxian Xu,Zhibing Wen,Licheng Sun,Fei Li
Developing efficient photocatalysts for water oxidation is among the central challenges of solar energy conversion. Here, we report semiconductor–molecular photocatalysts by integration of heteronuclear bimetallic polyphthalocyanine (PPc) catalysts with particulate bismuth vanadate (BiVO4) as the photosensitizer. Their photocatalytic activity for water oxidation was modulated by tuning the Fe/Co ratio of polyphthalocyanines. At an optimal Fe/Co ratio of 3:1, the resulting Fe3CoPPc-BiVO4 hybrid exhibits an excellent oxygen evolution rate of 4557 μmol g–1 h–1 in the presence of iodate under visible light irradiation, which is nearly two orders of magnitude greater than that of pristine BiVO4 and superior to those of the corresponding homometallic counterparts. Both experimental and theoretical methods suggest that the presence of a large population of high-valent Fe/Co molecular species due to the favorable interfacial charge transfer and upshift of the d-band centers of metal sites toward Fermi level lead to a lower energy barrier for the O–O bond formation and eventually promote the oxidation of water.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
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.
研究领域:
超分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xia Li,Weiqiang Fan,Yajie Bai,Ying Liu,Fengfeng Wang,Hongye Bai,Weidong Shi
Photoelectrochemical nitrate (NO 3 – ) reduction reaction (PEC NRR) is a promising technology to solve both environmental pollution and traditional energy crisis. However, the fabrication of efficient catalyst with controllable active sites for high selectivity is still challenging. In this work, copper phthalocyanine (C 32 H 16 CuN 8 )/cerium dioxide (CuPc/CeO 2 ) heterostructure has been designed as a model to understand the role of Ce 3+ /Ce 4+ pairs on the formation of oxygen vacancies (OVs), which helps for identifying the key factors to adjust the chemical adsorption and activation of NO 3 – in PEC NRR system. Furthermore, the unique organic–inorganic hybrid matrix significantly strengthens the relationship of solar harvest–carriers’ separation–NO 3 – reduction. CuPc/CeO 2 heterostructure exhibits a high NH 3 yield of 1.16 μmol h −1 cm −2 and Faradic efficiency of 33% (-0.6 V vs.), and the desirable PEC NRR could be well retained for 5 cycles. Therefore, the construction of CuPc/CeO 2 successfully optimizes the thermodynamic and kinetic factors in PEC NRR system, providing a new insight for organic–inorganic hybridization and NH 3 green production.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2022
·Vol. 13
·期 8
·1235
·
IF 3.523
Zhi Zhang,Yao Wang,Qun Chen,Qingguo Gao,Liming Liu,Jianjun Yang,Xinjian Pan,Yu Miao,Feng Chi
The electrophoretic display (EPD) has attracted widespread attention due to its great visual perception, energy-saving, portability, and bistability. However, the EPD still has many problems in response time, colorization, etc., which limits its practical application. In this paper, novel blue electrophoretic particles were prepared with copper (II) phthalocyanine and high ionization 1-butyl-1-methyl piperidinium bromide mono ionic liquid. It was shown that electrophoretic particles dispersed in a non-polar tetrachloroethylene medium had high Zeta potential and electrophoretic mobility. At the same time, electrophoretic particles showed better dispersion stability. Finally, the prepared blue electrophoretic particles and white titanium dioxide particles were compounded to prepare blue and white dual-color electrophoretic dispersion. An EPD cell was made to test its performance. The results showed that the prepared blue and white dual-color electrophoretic dispersion could realize a reversible response. Piperidine mono ionic liquid increased the surface potential of copper (II) phthalocyanine from +30.50 mV to +60.27 mV, enhancing it by 97.61%. Therefore, we believed that modifying particles with high ionization mono ionic liquid had great applicability to the modification of electrophoretic particles, and blue particles prepared with piperidine mono ionic liquid as a charge control agent (CCA) were excellent candidates for EPDs.Keywords:zeta potential;ionic liquid;copper (II) phthalocyanine;electrophoretic particle
研究领域:
材料科学
·
电泳显示器
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Xiaoyu Chu,Xinrui Wang,Shuo Tian,Yongkuo Zhao,Shikai Liu,Hong Yan,Yan Shang
Modulating the photogenerated electrons of CeO2 to activate O2 and efficiently photocatalytic degradation of chlorophenols is a highly desired goal. Herein, we have successfully fabricated FePc/CeO2 heterojunction through H-bond induced assembly. The photocatalytic degradation of 2, 4-DCP by the amount-optimized FePc/CeO2 nanocomposite was improved by 3 times compared with pure CeO2. By means of electron paramagnetic resonance (EPR) and single wavelength photocurrent spectroscopy, it is confirmed that the excellent photocatalytic performance is mainly attributed to the formation of Z-scheme heterojunction, which promotes charge separation and transfer, and the introduction of FePc broadens the visible light absorption range of heterojunction. Moreover, O2 temperature-programmed-desorbed curves and electrochemical O2 reduction measurements results demonstrate that the single Fe-N4(II) site in FePc is more conducive to promoting O2 activation than that of other metal phthalocyanines. Based on in situ FT-IR and liquid chromatography-tandem mass spectrometry (LC-MS), a possible reaction pathway of 2, 4-DCP degradation was proposed. This study provides a novel strategy to prepare CeO2 based Z-scheme heterojunctions with abundant monoatomic sites for pollutant degradation.
研究领域:
环境科学
·
材料科学
✓ 已验证
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）