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769 results on '"Lin, Chia-Her"'

16. Multifunctional Phra Phrom‐like Graphene‐Based Membrane for Environmental Remediation and Resources Regeneration.

Author

Huang, Tsung‐Han, Tian, Xin‐Yuan, Chen, Yi‐Yun, Widakdo, Januar, Austria, Hannah Faye M., Setiawan, Owen, Subrahmanya, T. M., Hung, Wei‐Song, Wang, Da‐Ming, Chang, Ching‐Yuan, Wang, Chih‐Feng, Hu, Chien‐Chieh, Lin, Chia‐Her, Lai, Yu‐Lun, Lee, Kueir‐Rarn, and Lai, Juin‐Yih

Subjects
ENVIRONMENTAL remediation, ENERGY shortages, WATER shortages, BARIUM titanate, ENERGY harvesting, PIEZOELECTRICITY
Abstract

Water and energy shortages are interdependent major worldwide issues that cannot be disregarded. In this work, graphene and BaTiO3 are used to synergistically facilitate the self‐assembly of the β‐phase that is known to induce the piezoelectric properties of the polyvinylidene fluoride (PVDF). This leads to a PVDF/graphene‐BaTiO3 nanocomposite with a unique capability of integrating Phra Phrom‐like four functions into one single asymmetric membrane: i) solar evaporation, ii) power generation, iii) piezo‐photodegradation, and iv) self‐cleaning/monitoring for environmental remediation and resources regeneration. The high heat accumulation capability and piezoelectric performance of the membrane enable it to simultaneously achieve a water production rate of 0.99 kgm−2h−1, in compliance with WHO standards, and a maximum power output of 5.73 Wm−2 in simulated natural environments. Upon subjecting the membranes to environmental cleaning, they not only show a 93% dye degradation rate due to the synergistic effect of piezoelectricity and photocatalysis but also resolve the membrane fouling issue, exhibiting ≈200% resistance change compared to the static state. The successful integration of these four functions into one membrane shows the great potential of this work toward a more sustainable and viable water and energy production approach. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Bi-metallic [Cu/Co(6mna)2]n metal organic chalcogenolate frameworks as high-performance electro-catalysts for dye-sensitized solar cells: a ligand-assisted bottom-up synthesis.

Author

Lai, Chun-Wei, Lee, Yu-Chien, Jiang, Yi-Zhen, Lin, Chia-Her, Kumar, Gautam, Huang, Michael H., and Li, Chun-Ting

Abstract

Mercaptonicotinate-based metal organic chalcogenolate frameworks (MOFs), including [Cu2(6mna)(6mn)NH4]n-NO3, [Co2(6mna)2]n-NO3, [Co2(6mna)2]n-Cl, [Cu/Co(6mna)2]n-NO3, and [Cu/Co(6mna)2]n-Cl (6mna = 6-mercaptonicotinic acid; 6mn = 6-mercaptonicotinate), were newly introduced as the electro-catalytic counter electrodes in dye-sensitized solar cells (DSSCs). By using a ligand-assisted bottom-up synthesis, these five types of MOF films were covalently bonded to a conducting substrate to deliver their intrinsic electro-catalytic ability without any additives. The DSSCs coupled with all the carbon cloth/MOF electrodes showed a superior solar-to-electricity conversion efficiency (9.4%–10.0%) to the cell with a traditional carbon cloth/Pt electrode (9.3%), demonstrating their outstanding electrochemical activities. Heterogeneous bi-metallic MOFs, [Cu/Co(6mna)2]n-NO3 and [Cu/Co(6mna)2]n-Cl, outperformed their mono-metallic counterparts by increasing film roughness/porosity and decreasing the activation energy for I−/I3−. Their remarkable electrochemical performance was attributed to the successful synergistic effect, where [Cu2(6mna)(6mn)NH4]n-NO3 provided facile charge transfer via its 2D (–Cu–S–)n planes, while [Co2(6mna)2]n supplied large surface area and multiple electro-catalytic active sites through its helical (–Co–S–)n chains. With the use of different redox mediators (iodide, Co-phenanthroline, and Cu-neocuproine), the optimal carbon cloth/[Cu/Co(6mna)2]n-Cl electrode also showed better electro-catalytic ability and long-term stability than carbon cloth/Pt. Under room light illumination, higher cell efficiencies were obtained at 1.0 klux (19.5% for an office), 3.0 klux (23.3% for a shopping window), and 6.0 klux (26.4% for a lampshade), revealing the potential of mercaptonicotinate-based bi-metallic MOFs to be applied in various electrochemical devices. [ABSTRACT FROM AUTHOR]

Published
2024
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29. Exploring the potential of iron-based metal–organic frameworks as peroxidase nanozymes for glucose detection with various secondary building units.

Author

Kulandaivel, Sivasankar, Chen, Hsin-Tsung, Lin, Chia-Her, and Yeh, Yi-Chun

Abstract

Finding materials in biosensing that balance enzyme-like reactivity, stability, and affordability is essential for the future. Because of their unique peroxidase properties, including variable pore size, surface area, and Lewis acid active sites, iron-based metal–organic frameworks (MOFs) have evolved as viable possibilities. In this study, we constructed a Fe-MOF and tested its peroxidase-like activity and responsiveness toward H2O2 colorimetric techniques. Using encapsulation, we incorporated glucose oxidase into the ZIF-90 PVP MOF and conducted a sequential reaction with the Fe-MOF to detect glucose. The results showed better peroxidase catalytic activity of the MIL-88B(Fe) (1,4-NDC) MOF and similar secondary building unit (SBU) Fe-MOFs were studied in other peroxidase nanozyme studies. When combined with an enzyme-encapsulating ZIF-90 PVP MOF, they could be sequentially employed for glucose detection purposes. This study highlights the potential of nanozymes as an alternative to natural enzymes, with promising applications in biosensing and beyond. [ABSTRACT FROM AUTHOR]

Published
2023
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