Article
Chemistry, Analytical
Kai Niu, Juan Gao, Lingxia Wu, Xianbo Lu, Jiping Chen
Summary: Enzymatic biosensors based on nitrogen-doped graphdiyne exhibit high sensitivity, excellent reproducibility, and stability, showing great potential for rapid detection of environmental pollutants. The nitrogen doping enhances electrical conductivity and substance adsorption, contributing to significantly improved biosensing performance.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Sevki Furkan Kucukayar, Veli Simsek, Mustafa Oguzhan Caglayan, Zafer Ustundag, Samet Sahin
Summary: In this study, carbonaceous materials were synthesized from typha tassel (TT) and pussy willow (PW) as biomass sources for enzymatic electrode modification. Different immobilization strategies using the carbonized TT (CTT) and PW (CPW) together with glucose oxidase (GOx), ferrocene (Fc), and Chitosan (Chit) were investigated. The results showed that Chit could preserve the activity of GOx, and when Fc was co-immobilized with GOx, better performance was achieved. The prepared electrodes demonstrated promising results for glucose biosensing. This study provides a comprehensive investigation of different immobilization strategies of GOx on carbonaceous electrodes and explores the potential use of biomass materials in bioelectronics approaches.
MICROCHEMICAL JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Shun-ichi Matsuura, Tomoya Baba, Takuji Ikeda, Katsutoshi Yamamoto, Tatsuo Tsunoda, Aritomo Yamaguchi
Summary: The mesoporous silica-enhanced PCR technology allows highly precise and sensitive DNA amplification/detection from minimal amounts of nucleic acid, making it applicable for genetic testing involving small samples.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Aleksanda Przewloka, Adil Rehman, Serguei Smirnov, Ewelina Karpierz-Marczewska, Aleksandra Krajewska, Malwina Liszewska, Piotr Drozdz, Krystian Pavlov, Maksym Dub, Serhi Novytskyi, Bartlomiej Jankiewicz, Zygmunt Mierczyk, Sergey Rumyantsev, Dmitri Lioubtchenko
Summary: This paper describes the non-covalent modification of single-walled carbon nanotubes (SWCNT) with methyl viologen (MV), which successfully changed the conductivity type from p-type to n-type. The properties of pristine and MV-modified SWCNT were compared using various techniques, and the change in conductivity type was confirmed through different measurements.
Review
Chemistry, Physical
Essam M. Dief, Nadim Darwish
Summary: Conventional methods for connecting molecules to electrodes have limitations, while electrochemical methods offer advantages such as accelerated reactions, controlled molecular coverage, and guided chemical bonding. Electrochemical grafting enables connection to various types of electrodes, including those that cannot be functionalized by other methods. Recent advances have also extended the scope to connect 2D materials.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Physical
Christiane Huettner, Fei Xu, Silvia Paasch, Christian Kensy, Yi Xuan Zhai, Jiaying Yang, Eike Brunner, Stefan Kaskel
Summary: Utilizing densely N- and O-doped ultra-hydrophilic carbon (DUT-108), supercapacitors exhibit anomalous electrochemical charge storage behavior even in diluted electrolytes and pure water. Compared to a commercial carbon model, DUT-108 shows higher capacitance and ion diffusion ability at very low electrolyte concentrations. This discovery opens up new possibilities for applications in bioelectronics, utilizing the environmentally friendly and biocompatible pure water electrolyte.
Article
Chemistry, Physical
Wenbo Qi, Simi Sui, Yating Shi, Liying Ma, Dongdong Zhao, Jianli Kang, Chunsheng Shi, Chunnian He, Naiqin Zhao, Junwei Sha
Summary: Fe2O3@C nanoparticles modified vertically aligned carbon nanotubes (VACNTs) composites are designed and employed as anodes for sodium ion capacitors (SICs) through a two-step chemical vapor deposition (CVD) process. The resulting composites exhibit remarkable sodium storage properties with high specific capacity and rate performance. Additionally, the composites show excellent cycling performance with significant capacity retention after 1000 cycles.
JOURNAL OF POWER SOURCES
(2023)
Review
Materials Science, Multidisciplinary
Laxmi Kant Pandey, Mahendra S. Gaikwad, Parmesh K. Chaudhari
Summary: Capacitive deionization (CDI) is a process used for water desalination and purification by removing pollutant ions. This review presents the current status of using biowaste material derived activated carbon (BMDAC) electrodes for pollutant ion removal in CDI. The review systematically discusses the fundamentals of CDI, its applications, various BMDAC materials, and compares the current status of pollutant ion removal using BMDAC electrodes in CDI, along with future research directions.
Article
Chemistry, Applied
Yunjie Fei, Ning Tang, Yin Chen, Mingyao Xu, Qin Tao, Yuanjian Liu, Xiaohui Xiong
Summary: A functional bipolar electrode-electrochemiluminescence (BPE-ECL) platform was developed for detecting electrochemically active bacteria (EAB) by constructing a biocathode that reduces oxygen. Thiolated trimethylated chitosan quaternary ammonium salt (TMC-SH) layer was assembled on the gold-plated cathode of BPE to inhibit the growth of microorganisms and absorb bacteria. The EAB was electrostatically adsorbed on the electrode surface and catalyzed the electrochemical reduction of O2, resulting in an ECL reporting intensity change at the anode.
Article
Environmental Sciences
Ana Carina Cruz de Mello, Felipe Pereira da Silva, Everton Gripa, Andrea Medeiros Salgado, Fabiana Valeria da Fonseca
Summary: In this study, the tyrosinase enzyme was immobilized on granular activated carbon (GAC) and activated chitosan beads (ACBs), achieving efficient phenol removal from water samples. The immobilized enzyme on GAC was able to meet the regulatory requirements for phenol concentration, while the enzyme immobilized on ACBs showed higher efficiency even with higher initial phenol concentrations. Moreover, both immobilized enzymes could be reused multiple times.
Article
Chemistry, Multidisciplinary
Min-Jung Ma, Jae-Gyoung Seong, Sivaprakasam Radhakrishnan, Tae-Hoon Ko, Byoung-Suhk Kim
Summary: In this work, network-structured carbon nanofibers were prepared using polyacrylonitrile blends as precursors through electrospinning/hot-pressing methods and stabilization/carbonization processes. The resulting carbonized nanofibers showed good mechanical and electrochemical properties, with cPNF-73 displaying the highest specific capacitance and energy density in supercapacitor applications. Additionally, the cPNF-73-based device demonstrated excellent cyclic stability after 2000 continuous charge-discharge cycles.
Article
Engineering, Electrical & Electronic
S. B. Jadhav, D. B. Malavekar, P. N. Pawaskar, S. B. Kale, S. R. Sabale, R. K. Sharma, C. D. Lokhande
Summary: A porous nanoflakes-like structure of Mn-doped lanthanum oxide (Mn-La2O3) was fabricated on a stainless steel substrate using the multipotential electrodeposition method. The Mn-La2O3 electrode catalyst showed excellent sensitivity and a wide linear response range for nonenzymatic electrochemical glucose detection. The results demonstrate the promising potential of the Mn-La2O3 electrode catalyst for glucose monitoring in human blood samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
S. B. Jadhav, D. B. Malavekar, P. N. Pawaskar, S. B. Kale, S. R. Sabale, R. K. Sharma, C. D. Lokhande
Summary: A porous nanoflakes-like structure of Mn-doped lanthanum oxide (Mn-La2O3) was fabricated on a stainless steel substrate using multipotential electrodeposition method. The Mn-La2O3 electrode catalyst showed excellent sensitivity and a wide linear response range for non-enzymatic electrochemical glucose detection. It also demonstrated good performance in the presence of other carbohydrates and oxidizable interferents commonly found in physiological blood samples. The 1% Mn-La2O3 electrode catalyst has promising potential for glucose monitoring in human blood samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Review
Biochemistry & Molecular Biology
Muhammad Bilal, Ehsan Ullah Rashid, Junaid Munawar, Hafiz M. N. Iqbal, Jiandong Cui, Jakub Zdarta, Syed Salman Ashraf, Teofil Jesionowski
Summary: Nanobiocatalysts are an emerging field of nanobiocatalysis that integrates enzyme molecules into multifunctional materials like metal-organic frameworks (MOFs). Among these materials, functionalized magnetic MOFs have gained significant interest as versatile nano-biocatalytic systems for various organic transformations. These systems offer controllable enzyme microenvironments and show promise in enzyme engineering and biocatalytic transformations.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Min Hu, Mingyue Shi, Xia Wang, Yujing Tang, Dingze Zhou, Kai Pan, Qigang Wang
Summary: Redox homeostasis is crucial for maintaining proper functioning of biomolecules and a stable microenvironment. Antioxidant enzymes can prevent or treat oxidative stress-related disease by modulating reactive oxygen species levels. This study developed a novel catalase-immobilized hydrogel platform with high catalytic activity and stability using a photo-enzymatic coupled radical polymerization strategy. This platform efficiently scavenges reactive oxygen species and provides effective cellular protection against external oxidative stress.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
In Gyeom Kim, In Wook Nah, In-Hwan Oh, Sehkyu Park
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Physical
Jihoon Lee, Ingyeom Kim, Sehkyu Park
Article
Chemistry, Physical
Jaewoo Cho, Seunghyeon Lee, Bong Sup Shim, Jung S. Yi, Daeho Kim, Sehkyu Park
Summary: This paper presents a novel water management technique using open furrows with serpentine patterns in the microporous layer of proton exchange membrane fuel cells (PEMFCs). Experimental results show that open furrows reduce water saturation in the catalyst layer and promote oxygen transport to the catalyst sites, improving fuel cell performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Jaewoo Cho, Daeho Kim, Jung S. Yi, Sehkyu Park
Summary: This study introduces novel self-standing microporous layers (SSMPLs) for proton exchange membrane fuel cells (PEMFCs) and investigates their performance compared to commercially available gas diffusion layers. Experimental and theoretical methods were used to analyze the mechanisms that lead to higher PEMFC performance with PVDF-bound SSMPLs. Atomic force microscopy was utilized to visualize the microstructures of the different layers and propose water transport mechanisms.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
In Gyeom Kim, Ahyoun Lim, Jong Hyun Jang, Kwan-Young Lee, In Wook Nah, Sehkyu Park
Summary: This study demonstrates the unprecedentedly high oxygen evolution reaction (OER) performance of binary iridium (Ir) and ruthenium (Ru) nanoparticles on TiO2-oxide-decorated reduced graphene oxide (rGO) in acidic media. The IrRu alloy electrocatalysts supported on TiO2-rGO show optimal OER performances and high stability, with the IrRu/T90G10 sample exhibiting remarkable OER activity and enhanced stability compared to unsupported catalysts.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Jaewoo Cho, Kyu-Su Kim, Soo Kim, Yuyan Shao, Yong-Tae Kim, Sehkyu Park
Summary: This study investigates the relationship between the specific activity and stability of the membrane-electrode assembly (MEA) in proton exchange membrane water electrolyzers (PEMWEs) by studying the electrochemical behavior of an Ir oxide electrodeposited on a Ti substrate. The results show that thermal treatment of the catalyst-coated substrate can modify the electronic properties of Ir oxide and enhance its oxygen evolution reaction (OER) activity and stability during PEMWE operation. The findings provide insights into strategies for improving the performance of PEMWEs and designing rational MEAs.
Article
Electrochemistry
Jaewoo Cho, Jaejun Ko, Sehkyu Park
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
