APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Yingchen Xu,Chenghan Yang,Qinghua Deng,Yuming Zhou,Chunfeng Mao,Youchao Song,Min Zhu,Yiwei Zhang
It is highly desirable and challenging to design efficient and stable hydrogen evolution reaction (HER) electrocatalysts in a variety of acidic and alkaline media. Here, a novel ternary catalyst has been proposed consisting of ruthenium dioxide doped carbon nanotubes (denoted as RuO 2 @CNT) wrapped in a multi-step strategy with a first synthesis of a bismuth metal porphyrin-based organic framework as co-catalyst (denoted as RuO 2 @CNT@MOF). The addition of CNT improves not only the conductivity of the electrocatalyst but also the distribution of the active RuO 2 particles. Furthermore, the highly symmetrical conjugated structure of Bi-TCPP MOF facilitates both the adsorption of hydrogen ions and the generation of hydroxyl radicals (•OH). The Bi-TCPP MOF encapsulated in the outer layer of RuO 2 @CNT enhances the mechanical strength and creates the confinement effect, leading to the synthesis of RuO 2 @CNT@MOF as a HER electrocatalyst that exhibits excellent catalytic performance and acid and base resistance. In particular, low overpotentials of 13 mV and 50 mV can be achieved to provide current densities of 10 mA cm −2 in alkaline and acidic media, respectively. Significantly, this work provides new ideas for the careful design and development of MOFs as co-catalysts to improve the overall performance of materials in energy-related fields.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhuo Liu,Fei Guo,Lei Cheng,Xiangjie Bo,Tingting Liu,Mian Li
With high prices of precious metals (such as platinum, iridium, and ruthenium) and transition metals (such as cobalt and nickel), the design of high-efficiency and low-cost non-precious-metal-based catalysts using iron (Fe) and manganese (Mn) metals for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical for commercial applications of water splitting devices. In the study, without using any template or surfactant, we successfully designed novel cross-linked manganese borate (Mn 3 (BO 3 ) 2 ) and iron carbide (Fe 3 C) embedded into boron (B) and nitrogen (N) co-doped three-dimensional (3D) hierarchically meso /macroporous carbon nanowires (denoted as Fe x Mn y @BN-PCFs). Electrochemical test results showed that the HER and OER catalytic activities of Fe 1 Mn 1 @BN-PCFs were close to those of 20 wt% Pt/C and RuO 2 . For full water splitting, (-) Fe 1 Mn 1 @BN-PCFs||Fe 1 Mn 1 @BN-PCF (+) cell achieved a current density of 10 mA cm −2 at a cell voltage of 1.622 V, which was 14.2 mV larger than that of (-) 20 wt% Pt/C||RuO 2 (+) benchmark. The synergistic effect of 3D hierarchically meso /macroporous architectures, excellent charge transport capacity, and abundant active centers (cross-linked Mn 3 (BO 3 ) 2 /Fe 3 C@BNC, BC 3 , pyridinic-N, M N C, and graphitic-N) enhanced the water splitting catalytic activity of Fe 1 Mn 1 @BN-PCFs. The (-) Fe 1 Mn 1 @BN-PCFs||Fe 1 Mn 1 @BN-PCF (+) cell exhibited excellent stability owing to the superior structural and chemical stabilities of 3D hierarchically porous Fe 1 Mn 1 @BN-PCFs.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2022
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IF 5.477
Yanan Wei,Chunxiang Li,Chentao Zhu,Yunlei Zhang,Zhi Zhu,Yao Chen,Xin Li,Yongsheng Yan
Background The conversion of 5-Hydroxymethylfurfural into high value-added 2,5-furandicarboxylic acid is of great significance for industrial production and people's life. Rationally regulation of oxygen vacancy and reactant adsorption are keys to developing an efficient metal oxide catalyst for aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid. Method In this research, nitrogen-doped porous carbon-supported Bi-doped CeO 2 (x%Bi-CeO 2 /N-PC T ) catalysts were successfully prepared by co-calcination method. Significant findings Oxygen vacancy concentration of CeO 2 can be effectively enlarged by Bi-doping, which was strongly related to the catalytic performance. In-situ FTIR and adsorption experiment results showed that the introduction of N-PC T can enhance the HMF adsorption performance of catalyst. Density functional theory calculation and XPS results proved that the HMF adsorption performance depend on content of graphitic N in N-PC T , thus effecting the catalytic performance of HMF oxidation. Synergistic effect of oxygen vacancy and HMF adsorption ability can enhance the catalytic performance, the FDCA yield of 10%Bi-CeO 2 /N-PC 800 was about 70 times higher than that of pure CeO 2 . 10%Bi-CeO 2 /N-PC 800 as support for Au nanoparticles demonstrated an excellent yield of FDCA (92.8%). This study provides a novel idea for design of CeO 2 -based catalyst for oxidation of HMF to high value-added downstream chemicals.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 40
·14435-14442
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IF 4
Qihao Wu,Tao Xie,Li Zhang,Hui Ding,Heju Gao,Jiahui Jiang,Guancheng Xu
To achieve broad commercialization of rechargeable metal–air batteries, the development of non-precious metal-based bi-functional oxygen electrocatalysts is critical. In this study, we prepared N,S co-doped porous carbon materials containing Co9S8 nanoparticles (Co9S8/NSC) through a one-step pyrolysis process. The process involved the pyrolysis of a polydopamine (PDA) coated Co-formic acid framework (Co-FF) derived Co3O4 and thiourea. The improved catalyst Co9S8/NSC-1 exhibited satisfactory long-term durability and superior oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity, the half-wave potential (E1/2) of the ORR reached 0.83 V, and the OER overpotential at 10 mA cm−2 (η10) was 300 mV. The zinc–air battery (ZAB) based on Co9S8/NSC-1 assembly had a maximum power density of 102.0 mW cm−2 and the cycle life reached 500 cycles. The material preparation method was simple, environmentally friendly and inexpensive, providing a feasible strategy for the development of non-precious metal-based electrocatalysts.
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MICROCHIMICA ACTA
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2020
·Vol. 187
·期 10
·1-10
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IF 6.232
Zhen Deshuai,Shi Sisi,Gao Chan,Kang Qing,Xiao Xilin,Grimes Craig A.,Cai Qingyun
Bi, Fe, and Ti ternary co-doped ZrO 2 (BFT-ZrO 2 ) nanocomposites have been prepared by a sol-gel process and used as both adsorbent and matrix for the enrichment and determination of small molecules by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS). The BFT-ZrO 2 nanocomposites not only can selectively enrich a wide variety of low-mass toxic pollutants but can also be used as an excellent matrix to enhance the laser desorption/ionization efficiency with low background noise and uniform co-crystalline film. Low limits of detection (LODs) (0.1 pg mL −1 for bisphenol A (BPA), 2 pg mL −1 for tetrabromobisphenol A (TBBPA), 0.1 pg mL −1 for alizarin (AZ), 0.001 pg mL −1 for bisphenol S (BPS), 0.01 pg mL −1 for indigo blue (ID), 0.01 pg mL −1 for pentachlorophenol (PCP), 100 pg mL −1 for estradiol (E2), 0.001 pg mL −1 for cetyltrimethylammonium bromide (CTAB), 0.1 pg mL −1 for crystal violet (CV), 1 pg mL −1 for malachite green (MG), 0.01 pg mL −1 for rhodamine B (RhB), and 0.01 pg mL −1 for perfluorooctane sulfonate (PFOS) were achieved. The relative standard deviations (RSDs) of shot-to-shot are 9.4–24% and of sample-to-sample 5.2–17%. The BFT-ZrO 2 matrix was successfully applied to the determination of TBBPA and BPA in tea samples. This method shows a new strategy for determination of toxic compounds in tea.
Graphical abstract
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 39
·22364-22372
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IF 12.732
Ying Li,Xia Zhong,Xianwen Wu,Mingqi Li,Wei Zhang,Dan Wang
To develop high-performance and low-cost anode materials for sodium ion batteries, novel Bi/C nanosheet microspheres with an open pore structure (labeled as ops-Bi/C nanosheet microspheres), in which nanosheets are assembled from Bi nanospheres and disordered C, are synthesized through facile methods using Bi(NO3)3, glucose and ethylene glycol as raw materials. Benefiting from the synergy of the material's unique microstructure, carbon coating and NaPF6–diglyme electrolyte, the ops-Bi/C nanosheet microspheres exhibit a higher stable reversible capacity (∼400 mA h g−1 at 0.1 A g−1) than the theoretical capacity of Bi metal, excellent rate performance (396, 393, 395, 392 and 381 mA h g−1 at 0.2, 1, 5, 10 and 20 A g−1, respectively) and long cycle life (361 mA h g−1 after 10 000 cycles at 5 A g−1). Moreover, even if the mass loading of the ops-Bi/C nanosheet microspheres exceeds 10 mg cm−2, the electrode still shows a high reversible capacity of 321 mA h g−1 at 0.8 A g−1 with good cycle performance. The sodium ion full cells composed of the ops-Bi/C nanosheet microsphere anode and commercial Na3V2(PO4)3 (NVP) cathode exhibit high energy density (174 W h kg−1(total) at 0.1 A g−1(NVP)) and long cycle performance (600 cycles at 1 A g−1(NVP)).
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CHEMISTRY OF MATERIALS
·
2021
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IF 9.811
Da Chen,Shiqiang Hao,Liubing Fan,Yangwu Guo,Jiyong Yao,Christopher Wolverton,Mercouri G. Kanatzidis,Jing Zhao,Quanlin Liu
Recent discoveries in organic−inorganic metal halides reveal superior semiconducting and polarization properties. Herein, we report three organic–inorganic metal halides, (PBA)4BiBr7·H2O, (PBA)4BiI7·H2O, and (PBA)4InBr7·H2O [(PBA)+ = C6H5(CH2)4NH3+], with band gaps of ∼3.52, ∼2.29, and ∼4.05 eV, respectively. They possess zero-dimensional structures containing the inorganic octahedra [MX6]3– (M = Bi, In, X = Br, I) and unbound X– ions and crystallize in the C2 space group. (PBA)4BiI7·H2O shows a second-harmonic-generation (SHG) response in the infrared region, approximately 1.3 times that of AgGaS2; (PBA)4BiBr7·H2O and (PBA)4InBr7·H2O show SHG responses in the ultraviolet region, approximately 0.4 and 0.6 times that of KH2PO4, respectively. The large SHG responses are attributed to the synergistic contribution of the octahedral distortion of [MX6]3– (M = Bi, In, X = Br, I) and the ordered arrangement of the benzene ring-containing organic cation PBA+. Upon ultraviolet and visible-light excitations at room temperature, (PBA)4BiBr7·H2O, (PBA)4BiI7·H2O, and (PBA)4InBr7·H2O exhibit broad red-light luminescence with large Stokes shifts of 290, 237, and 360 nm, respectively, due to self-trapped exciton emission. All of these properties demonstrate that this series of metal halides are potential multifunctional optoelectronic materials.
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ELECTROCHIMICA ACTA
·
2015
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IF 4.504
Yang Fan,Pei-Fang Liu,Zi-Juan Yang,Tong-Wu Jiang,Kai-Li Yao,Ran Han,Xin-Xin Huo,Yun-Yi Xiong
Porous carbon spheres (PCSs) are prepared via a facile hydrothermal carbonization and chemical activation route with pectin as the biomass precursor. The as-obtained PCSs present a large specific surface area (2440 m 2 g −1 ), well-balanced micro/mesoporosity with narrow pore size distribution and high content of oxygen-containing functional groups. The structure features make the PCSs an ideal electrode material for electrochemical energy storage . As electrode material for supercapacitors , the PCSs exhibit a high specific capacitance, good rate capacity and cycling stability. Furthermore, the PCSs show attractive property as support material for Pt electrocatalysts . Pt nanowires (PtNWs) grown on the PCSs interconnect with each other to form a porous nanowires network structure. The three-dimensional (3D) hybrid catalyst material consisting of PtNWs network supported on PCSs exhibit superior catalytic activity and stability towards both methanol and ethanol electro-oxidation in acidic media. In addition, owing to the rich presence of surface oxygen groups on PCSs, the CO-poisoning tolerance of the supported Pt nanowires is greatly promoted.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Mingming Li,Yue Gong,Jiaqiang Wen,Zhengda Li,Yanjie Wang,Tao He
The development of advanced photoactive materials has aroused widespread interest, but is severely plagued by the inherent narrow photo-responsive range and rapid recombination of electrons and holes. In this study, the unconventional BiOBr nanosheets decorated with Bi 0 and oxygen vacancies (OVs) are successfully synthesized through a facial one-pot hydrothermal method, followed by heat treatment. Cetyltrimethylammonium bromide and mannitol contribute to the selective exposure of (001) and (010) facets, respectively. The absence of the outermost Br atoms facilitates the simultaneous generation of OVs and Bi 0 on the surface during heating, forming the Schottky junction. The synergy of SPR in the Bi 0 metal, OVs and Schottky junction can effectively enhance the light absorption and charge separation. This work proposes and verifies a feasible approach to construct defects in-situ by regulating the crystal facets and manipulating the surface atomic arrangement and coordination.
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Journal of Water Process Engineering
·
2024
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IF 6.3
Yi Duan,Miaobin Ye,Ye Zou,Haiyan Jiang,Shuai Zhou,Pingli Cai
In this work, cobalt-doped graphitic carbon nitride (Co-CN) was synthesized through a high-temperature calcination method and employed to activate peroxymonosulfate (PMS) for ciprofloxacin (CIP) removal. The experimental outcomes demonstrated that under optimized conditions of 0.5 g/L 0.25Co-CN, 2 mM PMS, an initial solution pH of 7, an initial CIP concentration of 5 mg/L, and at a temperature of 30 °C, the removal efficiency of CIP can reach 99.5 % within 45 min. The kinetics of CIP removal by Co-CN activated PMS are accurately modeled by a bi-exponential decay function, indicating a CIP removal process involving both rapid and slower reaction phases. Furthermore, after five cycles of reuse, the catalyst maintained a respectable removal efficiency of 83.3 % for CIP, with pre- and post-reaction characterizations affirming the excellent reusability and stability of 0.25Co-CN. Quenching experiments and Electron Paramagnetic Resonance (EPR) tests confirmed the predominance role of 1 O 2 in the catalytic degradation mechanism. The Co N 4 active sites within 0.25Co-CN were identified as crucial for adsorption and subsequent degradation of CIP. In this study, a novel kinetics model is proposed for fitting the CIP removal process under the synergistic effect of adsorption and catalysis, which provides new insights into the understanding of the dynamic process of organic pollutant removal.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhecun Wang,Jinghan Zhang,Yubing Shao,Zhanyuan Cui,Yali Zhao,Yan Zhang
The Janus membranes with asymmetric wettability can gate oil or water transport spontaneously and directionally to facilitate the liquids transport for oil/water emulsions separation without extra energy consumption, which have attracted wide attention. However, this single-functioned either oil or water removal Janus membranes can only separate one type of emulsions and cannot meet the requirements in complex environments. Herein, a bi-functional Janus mesh membrane with selective directional oil- and water-transport integration induced by direction-directed dual asymmetric wettability is demonstrated for energetic-efficient on-demand separation of oil-in-water and water-in-oil emulsion. An ingenious double single-side asymmetric modification strategy is proposed to make a homogenous mesh membrane with special Janus interface, where one surface features oleophobicity and hydrophilicity while the other shows superhydrophobicity and oleophilicity. This direction-directed wettability imbalance gives rise to the selective directional both water and oil transport property, namely , one surface directionally transports oil and block water. In contrast, the other surface suspends the oil and directionally transports water across the membrane. According to this property, this multifunctional Janus mesh membrane achieves high-performance on-demand oil-in-water and water-in-oil emulsions separation without extra energy consumption.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xia Zhang,Changcheng Yang,Jian Su,Zhi-Hui Xie,Shixiong Hao
The lower specific surface area and limited surface contact between BiOCl and TiO 2 in composite fabricated by hybridization of TiO 2 with BiOCl extremely hinder its catalytic performance. In this work, the area of interface contact between BiOCl and TiO 2 was increased through the mediation of SiO 2 , and a Bi-modified ternary 0D/2D/2D TiO 2 /BiOCl Z-scheme heterojunction photocatalyst with large specific surface area (= 237.83 m 2 g −1 ) and surface plasmon resonance (SPR) effect was constructed in situ by ingeniously utilizing the reduction of carbon species generated during the calcination process. The results show that the COD removal rate of Bi/TBOC-10% for real liquor brewing wastewater (LBW) reaches 90.5% after 10 hours of visible light irradiation, which is 2.6 times and 2.1 times that of TiO 2 and Degussa P25, respectively. The COD removal rate of the composite was reduced only by 8.9% after five cycles of performance test (50 h). Photoluminescence spectroscopy (PL), Transient Photocurrent Response (TPR), Electrochemical Impedance Spectroscopy (EIS) and BET characterization suggest that its excellent photocatalytic activity should be attributed to the Z-scheme heterojunction that broadens the light absorption range while retains strong oxidation-reduction active sites, the SPR effect that facilitates the separation and migration of photogenerated carriers, and high specific surface area of the composite that provides more active sites for the photodegradation reaction.
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