JOURNAL OF POWER SOURCES
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2012
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IF 4.951
Jing Yang,Ligang Feng,Fengzhan Si,Yuwei Zhang,Changpeng Liu,Wei Xing,Kunqi Wang
H 2 -mesoporphyrin IX and Zn-mesoporphyrin IX have been investigated as sensitizers for the titanium dioxide (TiO 2 ) film electrode to construct a new two-compartment photoelectrochemical biofuel cell (PEBFC). The PEBFC can convert the light and chemical energy to electricity by consuming photons and oxidizing glucose. The two sensitizers are similar with two carboxyl anchoring groups, except that the central hydrogen atoms in the H 2 -mesoporphyrin IX are replaced by zinc. To determine how cell performance is affected by the sensitizer, we analyze the photochemical and photoelectrochemical properties of the two sensitizers by physical characterization and photoelectrochemical experiments. The UV–Vis absorption spectra and X-ray photoelectron spectra (XPS) indicate that the interactions between the sensitizer and TiO 2 decrease in the order of H 2 -mesoporphyrin IX > Zn-mesoporphyrin IX. The interactions are also determined by Fourier transform infrared (FTIR) spectra which indicate that the two sensitizers are adsorbed on the TiO 2 film through the carboxyl groups. The photovoltaic characteristics show the Zn-mesoporphyrin IX is less effective in comparison with the H 2 -mesoporphyrin IX, since the Zn-mesoporphyrin IX enhances the back electron-transfer process, producing lower IPCE and current. These results reveal that the H 2 -mesoporphyrin IX is a more efficient sensitizer compared with the Zn-mesoporphyrin IX for the PEBFC.
研究领域:
生物化学
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材料科学
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能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2015
·
IF 2.729
Shuang Ren,Huan Wang,Hongyi Zhang,Liqing Yu,Mingjie Li,Meng Li
Novel mesoporous carbon fibers (MCFs) were fabricated through a self-templating strategy and solution growth process. MCF modified glassy carbon electrode (MCF/GCE) was proposed for the direct electrocatalytic and simultaneous determination of four DNA bases (guanine (G), adenine (A), thymine (T) and cytosine (C)) using differential pulse voltammetry (DPV) measurement. The MCF/GCE exhibits satisfactory electrocatalytic activity by significantly enhancing the oxidation peak currents and lowering the oxidation potentials toward the four bases when compared with those on GCE. Especially, MCF greatly accelerates the electron transfer of pyrimidine base, which have high oxidation potentials and slow electron transfer kinetics. Moreover, MCF/GCE realizes the simultaneous determination of four DNA bases with low detection limits, high sensitivity and wide linear range. More important, the proposed electrode was successfully applied in the direct detection of bases in herring sperm DNA sample with satisfactory results. Besides, the MCF/GCE shows good long-term stability and reproducibility. These superior performances of MCF/GCE toward purine and pyrimidine DNA bases provide a good possibility for applying the MCF/GCE in our further DNA biosensor research.
研究领域:
生物化学
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分析化学
✓ 已验证
DOI
高影响因子
BIOMASS & BIOENERGY
·
2024
·
IF 5.8
Linghui Kong,Yunyu Guo,Baihong Li,Yuewen Shao,Chao Li,Lijun Zhang,Zhihui Pan,Yuxuan Liu,Shu Zhang,Qiaoling Li,Xun Hu
Cracking reactions play essential roles in pore development of activated carbon (AC) during activation of a biomass feedstock with K 2 C 2 O 4 . Strengthening activity of activating agents for cracking might increase capability for creating pores. This was verified herein by conducting activation of poplar wood and its derived biochar by K 2 C 2 O 4 with Ni presence for enhancing activity for cracking. The results indicated that nickel species promoted cracking, decreasing substantially yield of AC by 41.4 % and abundance of organics in resulting bio-oils. Nonetheless, nickel presence remarkably enlarged pore volume (1.0 versus 0.7 cm 3 /g in control experiment without Ni) and average pore diameter (1.7 versus 1.0 nm), creating more mesopores (84.7 % versus 96.8 %) and macropores. Activation of poplar-derived biochar enhanced specific surface area (1167.4 versus 1033.4 m 2 /g) and also formation of mesopores (81.0 % versus 98.1 %) with nickel presence. Additionally, nickel also promoted dehydrogenation and deoxygenation, rendering AC of higher aromatic degree. However, some nickel species inserting skeleton of AC were difficult to be removed via acid washing, which blocked some pores. Nickel presence also led to more fragmented structure of AC in either activation of PW or the biochar, generating more larger pores with minimized steric hindrance for adsorption of large molecules like tetracycline.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Yajuan Li,Dongyan Xie,Xuelei Pang,Xudong Yu,Tao Yu,Xiaoting Ge
A novel silylated ligand (L–Si) derived from a derivative of phenanthroline (2-(2-hydroxyphenyl)-imidazo[4,5-f]-1,10-phenanthroline, denoted as L) was designed, and it played key roles in the assembly of new organic-inorganic mesoporous hybrid functional material. Firstly, the two N atoms of pyridine rings can coordinate to europium ions and sensitize its luminescence. Secondly, the NH of imidzole ring could form hydrogen bonds with fluoride anions. Thirdly, the silylated group can covalently bonded to the frame of SBA-15 mesoporous silica via in-situ synthesis approach. In addition, 2-thenoyltrifluoroacetonate (TTA) was selected as the second ligand for the purpose of better luminescence. Finally, the europium luminescent mesoporous hybrid material Eu(L–S15) 2 TTA was obtained through the coordination reaction between europium ion and L–S15 as well as the second ligand TTA. Eu(L–S15) 2 TTA not only exhibits excellent luminescent properties and high thermal stability, but also retains the ordered mesoporous structures. More importantly, it displays a high-sensitivity sensing function with respect to fluoride ion. The limit of detection for the fluoride ion is as low as 1.6 × 10 −9 M for the fluoride ion.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2018
·
IF 4.521
Shaozhong Li,Yu Wang,Bin Yang,Limin Guo
Mesostructured catalysts with optimized microstructure and surface properties endowed them attractive catalytic performance. Herein, the mesostructured AlCeO supports with different weight ratio of Al 2 O 3 and CeO 2 have been prepared on the basis of a self-assembly sol-gel process, then 15 wt.% Cu was loaded onto the mesostructured AlCeO supports by incipient wetness impregnation method. The mesostructured AlCeO supports with varied ratio of Al 2 O 3 to CeO 2 resulted in the very different Cu particle size, and for the optimized catalyst Cu/AlCeO-7 (the amount of Al 2 O 3 in AlCeO support was 70 wt.%), the Cu crystal size was around 7 nm based on the characterization of XRD and TEM. The Cu/AlCeO-7 catalyst had strong metal-support interactions (SMSI) and more Cu-ceria interface, which was confirmed by the XPS. Furthermore, the Cu/AlCeO-7 catalyst showed the highest exposed Cu surface area ( S Cu ) (25.5 m 2 /g cat ) from the analysis results of H 2 -TPR and dissociative chemisorption of nitrous oxide. The CO 2 -TPD results demonstrated the Cu/AlCeO-7 had strong surface basicity. Hence, Cu/AlCeO-7 catalyst showed the highest space time yield of methanol (STY MeOH ). The CO 2 conversion (Cu/AlCeO-7, V(H 2 )/V(CO 2 ) = 3/1, GHSV = 6000 mL h −1 g −1 and P = 4 MPa) was up to 22.5% at 553 K, the methanol selectivity can reach 94% at 473 K, and the STY MeOH was up to 7.2 mmol g cat. -1 h -1 at 493 K. The as-prepared mesostructured Cu/AlCeO-7 exhibited a promising catalyst candidate for CO 2 hydrogenation to methanol.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
Minerals
·
2019
·Vol. 9
·期 4
·254
·
IF 2.25
Lvshan Zhou,Tongjiang Peng,Hongjuan Sun,Xiaogang Guo,Dong Fu
A precipitation reaction method was employed to prepare mesopore calcium carbonate (CaCO3) using rape flower pollen as the template. CaCO3adsorbent was characterized using X-ray diffraction (XRD), scanning electronic microscopy (SEM), and Brunner−Emmet−Teller measurements (BET). The equilibrium adsorption data on amoxicillin were explained using Langmuir, Freundlich, and Temkin adsorption isotherm models. The pseudo-first order, second order, pseudo-second order, and intra-particle diffusion kinetic models were used to explore adsorption kinetics. Equilibrium adsorption of as-prepared CaCO3was better depicted using the Langmuir adsorption model with an R2of 0.9948. The separation factor (RL) was found to be in the range of 0
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Zhongyao Duan,Kai Deng,Chunjie Li,Mei Zhang,Ziqiang Wang,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Hydrogen evolution reaction (HER) from water electrolysis in alkaline and neutral media provides a possibility to produce pure hydrogen fuel on a large scale. Therefore, the exploration of highly efficient non-Pt HER electrocatalysts is of great significance. Herein, polyaniline (PANI)-coated mesoporous Rh film on Ni foam is controllably fabricated by a micelle-assisted replacement reaction and the subsequent surface modification. Profiting from the synergetic effect of interconnected mesoporous structure, high electrical conductivity of PANI and the modified electronic structure of Rh, the synthesized mRh@PANI film exhibits superior HER electrocatalytic activity and durability in alkaline and neutral electrolytes. To reach a current density of 50 mA cm −2 , low overpotentials of 37 and 69 mV are required in 1 M KOH and 1 M PBS solutions, respectively.
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
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.9
Sarmad Soomro,Zhenkun Sun,Dennis Y. Lu,Zhihao Zhou,Lin Li,Lunbo Duan
Catalyst deactivation due to carbon deposition and sintering poses a significant challenge to the efficient dry reforming of CH 4 and CO 2 into syngas, particularly at high Ni loadings. To tackle this difficulty, ordered mesoporous silicas with varied pore symmetries were employed as supports in this study to synthesize the Ni-based catalysts using hydrothermal treatment. The 10% Ni/MCM-41 catalyst exhibited the highest conversion rates for CO 2 (81%) and CH 4 (77%), with favourable H 2 /CO (0.92) ratios indicating efficient syngas production Higher Ni concentrations increase active sites and catalytic performance, they also increase carbon deposition, reducing catalyst durability. At lower Ni loadings (4% Ni), catalysts with a 3D pore structure showed improved activity and stability, effectively reducing carbon deposition. This study demonstrates that optimized mesopore symmetries and Ni loadings can enhance catalyst efficiency and durability for syngas production.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 48
·27565-27573
·
IF 2.936
Qian Meng,Peng Du,Bo Wang,Aijun Duan,Chunming Xu,Zhen Zhao,Cong Liu,Di Hu,Yuyang Li,Chengkun Xiao
Zirconium modified mesoporous materials were successfully synthesized by different methods including direct synthesis and post synthesis (grafting and impregnating). Meanwhile, the corresponding catalysts were prepared. A series of techniques, including small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and pyridine adsorption Fourier-transform infrared (Py-IR), were used to characterize the properties of supports and catalysts. The results of SASX and TEM characterization proved that all the modified materials retained the well-ordered mesoporous structure from the FDU-12 material. N2 adsorption–desorption results showed that the Zr-FDU-12 material obtained by direct synthesis (Zr-in-F) possessed higher specific surface area (709 m2 g−1), pore volume (0.65 cm3 g−1) and larger pore size (18.7 nm) than the Zr-FDU-12 materials obtained by the post synthesis. According to the characterization result of UV-Vis, Zr-in-F exhibited better dispersion of Zr species than materials obtained by the post synthesis. It was found that the incorporation of Zr species not only increased acidities but also enhanced the sulfidities of the Mo species. All the catalysts were evaluated for their activities in the hydrodesulfurization of dibenzothiophene, and the NiMo/Zr-in-F catalyst exhibited the best catalytic performance (97.3%), attributed to its higher specific surface area, larger pore size, higher sulfidity, and more acidic sites.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
MRS Communications
·
2021
·Vol. 11
·期 4
·418-424
·
IF 2.566
Liu Heguang,Jing Ruixuan,Wang Zilu,You Caiyin
Abstract FeS 2 is thought to be a kind of promising anode materials used for lithium-ion batteries (LIBs), but the intrinsic low electrical conductivity and remarkable volume change hinder its practical application. In the present work, we proposed a strategy by introducing mesoporous carbon (MPC) to obtain a FeS 2 /MPC composite electrode for LIBs. The FeS 2 /MPC composite was prepared by hydrothermal method. The results indicated that the FeS 2 /MPC composite electrode exhibited better electrochemical performance than pristine FeS 2 . Especially, the discharge capacity of composite electrode reached 650 mAh g −1 at 0.5 C current density, and this was significantly higher than that of pristine FeS 2 . Graphic abstract
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rongli Fang,Le Zhang,Shunjiang Huang,Ying Jin,Kaiwen Guo,Bingying Li,Yue Wang
Electrochemical treatment of saline or brackish water by capacitive deionization (CDI) is a novel resource-saving solution to ensure the availability of freshwater resources in the environment. MOF (metal–organic framework) derived carbon as a novel carbonaceous material in CDI has received considerable research attention. Among them, ZIF-L-derived carbon (ZC) suffers from problems such as self-aggregation, poor mesoporous structure, and low electrical conductivity, which lead to poor CDI performance. In this paper, a strategy of ZIF-L coated with polydopamine (PDA) is proposed to solve the above problems. When the amount of PDA was 0.5 g, ZIF-L@PDA 0.5 -derived carbon composite (ZPC 0.5 ) is obtained for efficient capacitive deionization. The ZPC 0.5 composite not only maintains the 2D leaf shaped structure consistent with ZIF-L, exposing more active sites, but also has an elevated mesopore occupancy ratio to promote solution diffusion. Meanwhile, the interaction between PDA and ZIF-L makes the ZPC 0.5 have a cavity structure, which improves the mass transfer capacity. The resulting ZPC 0.5 composite has a specific capacitance (165.8 F g −1 ) that is 3.86 times higher than that of ZC (42.9 F g −1 ). Consequently, in 1.2 V, 500 mg/L NaCl solution, the symmetric CDI cell ZPC 0.5 //ZPC 0.5 exhibits an excellent desalination capacity (29.6 mg/g), which is 2.69 times that of the ZC//ZC.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2017
·Vol. 7
·期 7
·201
·
IF 3.082
Xinxin Jin,Yan Xie,Jiahui Huang
Metal macrocycle based non-noble metal electrocatalysts (NNMEs) with highly efficient oxygen reduction reaction (ORR) activity, good stability, and excellent resistance to the methanol cross-over effect have been regarded as one of the most important alternatives for Pt or Pt based alloys, which are widely used in fuel cells. However, the expensive price of most metal macrocycles hinder further investigation of such a family of NNMEs in large production for practical applications. Here, we introduce a simple strategy to synthesize metal macrocycle based porous carbon (MMPC) material with low cost and easy production of metal macrocycles (hemin (Hm) and vitamin B12(VB12)) as raw materials by using a hard template of MgO. The pyrolysis of MMPC under the optimal temperature at 900 °C shows comparative ORR performance relative to commercial Pt/C, which could be attributed to the large surface area, macro-/mesoporous structure, the carbon layer encapsulating transition metal based oxides, as well as N-doped carbon species. In addition, MMPC (900) displays a better electrochemical property than 20 wt % Pt/C in terms of durability and tolerance to methanol in O2-saturated 0.1 M KOH media.Keywords:metal macrocycle;macro-/mesoporous structure;oxygen reduction reaction;fuel cell
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）