Article
Engineering, Environmental
Xinyi Li, Yangtian Huang, Yubiao Lu, Tianbo Jia, Jianxin Wang, Peng Li
Summary: Nitrogen-doped graphene oxide (N-doped GO) catalyst improves the oxygen reduction reaction (ORR) performance of air-cathode microbial fuel cell (AMFC), enhancing the output voltage and power density. The NGO10 catalyst shows the highest output voltage (391.8 mV) and power density (1800 mWm-3) in AMFC, outperforming H-NGO and Pt/C electrodes. High-throughput sequencing reveals diverse bacterial communities in anode and cathode biofilms, with enriched denitrifying bacteria including Marinobacter, Methylophaga, and Arcobacter on NGO10 cathode. Real-time PCR confirms higher expression of denitrification-related genes in the NGO10 cathode biofilm.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Meng Xu, Ling Wu, Meiwen Zhu, Zhipeng Wang, Zheng-Hong Huang, Ming-Xi Wang
Summary: In this study, an integrated air cathode for microbial fuel cell (MFC) was developed without additional layers and adhesives. The cathode was made of nitrogen-doped reduced graphene oxide and carbon nanofiber hybrid membranes, and showed superior MFC performance and oxygen reduction reaction (ORR) activity.
Article
Chemistry, Multidisciplinary
Shuting Huang, Yanxian Geng, Jie Xia, Dongyun Chen, Jianmei Lu
Summary: In this study, a series of catalysts were successfully prepared and NiCo@DNC-800 demonstrated superior ORR activity with a higher maximum power density compared with Pt/C. The dual-doped N/C matrix provided more active sites, significantly improving the ORR performance of MFC.
Article
Environmental Sciences
Shreeniwas Madhav Sathe, Manikanta Manmadha Doki, Subrata Mandal, Rajakumar Ananthakrishnan, Brajesh Kumar Dubey, Makarand Madhao Ghangrekar
Summary: The widespread application and subsequent discharge of surfactants in developing countries is a common issue. In this study, a composite of graphitic carbon nitride (GCN) and TiO2 was used as a photo-electro-catalyst in a microbial fuel cell (MFC)-based hybrid system for bio-electricity production and simultaneous pollutant removal. The GCN-TiO2 composite showed better electrochemical response and achieved higher removal efficiency of COD and SDS compared to standalone TiO2. The results demonstrate the potential of this MFC-based hybrid system for municipal wastewater treatment and indicate an innovative research direction in the field of photoelectro-catalysts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Bi-Lin Lai, Hai-Xia Liao, Shu-Qi Zhou, Hui-Xu Wei, Ai-Yi Li, Nan Li, Zhao-Qing Liu
Summary: This study successfully prepared a series of chalcogen-modified copper and nitrogen co-doped catalysts, which showed improved oxygen reduction reaction (ORR) performance through proper chalcogen doping while maintaining antibacterial properties. Among these catalysts, the optimized Cu2S@Cu-SNC-2 catalyst exhibited excellent durability and ORR activity, outperforming the commercial Pt/C catalyst. The MFC based on Cu2S@Cu-SNC-2 also achieved significantly higher power density and had fewer cathode biofilms.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Amitap Khandelwal, Kiran Dhindhoria, Ambesh Dixit, Meenu Chhabra
Summary: The study focuses on the development of a low-cost cathode catalyst for algae-based microbial fuel cells, comparing its performance with Pt coated electrodes. The new composite cathode showed higher power density, current density, algal growth, and electrocatalytic activity compared to traditional Pt-coated electrodes, which hindered algal growth.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Junfeng Chen, Kunqi Zhao, Yiqun Wu, Jinyu Liu, Renjun Wang, Yuewei Yang, Yanyan Liu
Summary: The property of cathode in microbial fuel cell (MFC) is a key factor limiting its output performance. MnO2 nanorods were prepared by hydrothermal method and used as cathode catalysts for MFCs. The unique crystal planes and abundant hydroxyl groups on the surface of MnO2 nanorods provided active adsorption sites, leading to a significantly higher power density and stability compared to other cathode materials.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Jingzhen Wang, Kaijie Mu, Xuedong Zhao, Dianliang Luo, Xiaodi Yu, Wenpeng Li, Jie Chu, Jing Yang, Qinzheng Yang
Summary: In this study, Pd was uniformly dispersed on the graphene framework supported by carbon black to form nanocomposite catalysts, leading to improved catalytic performance. The optimized metal loading reduced resistance and improved accessibility of Pd particles for the ORR, resulting in a 4.2-fold increase in the maximum current output of the MFC compared to the carbon paper cathode. Overall, this research provides a novel protocol for preparing high-efficiency ORR catalysts for MFCs.
Article
Thermodynamics
Wenwen Chen, Zhongliang Liu, Yanxia Li, Qiang Liao, Xun Zhu
Summary: This study proposes an energy-efficient method for preparing a three-dimensional binder-free air cathode for MFCs by synthesizing non-noble composite catalysts on stainless steel fiber felt (SSFF). This method aims to reduce the cost of air cathode preparation while maintaining high electricity output of MFCs.
Article
Engineering, Environmental
Yue Qin, Huiyu Li, Yaxin Sun, Shiquan Guo, Yuanfeng Liu, Zhenyu Zhai, Congju Li
Summary: The author successfully synthesized a new type of hybrid porous electrocatalyst derived from metal-organic frameworks, which can improve the electricity generation efficiency of microbial fuel cells and solve the problem of sluggish kinetics in the cathodic oxygen reduction reaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Analytical
Amna Anjum, Shaukat Ali Mazari, Zubair Hashmi, Abdul Sattar Jatoi, Rashid Abro
Summary: Cathodes are crucial in assessing the performance of microbial fuel cells, with oxidation reduction reactions improving power density and electrochemical performance. Proper catalyst loading can enhance cathode performance significantly.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Electrochemistry
Bolong Liang, Ming Su, Zhe Zhao, Hongbin He, Shumin Lin, Shu-xuan Liang
Summary: To investigate the effect of iron ligands on catalyst properties, catalysts with different structures using four kinds of ligands were prepared and compared for their oxygen reduction reaction (ORR) activity and maximum power density in microbial fuel cells (MFCs). The results showed that the Fe single atoms, metal-organic framework compound, Prussia blue crystal, and ethylenediamine coordination compound exhibited different maximum power densities and electrochemical performances. It was found that the structures and surface properties of the catalysts played a significant role in ORR activity, with the single-atom and ethylenediamine coordination structures showing promise for ORR in MFCs.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Xueli Zhang, Zhiyuan Lin, Bolong Liang, Ming Zhong, Mingtao Zhang, Kexun Li, Hao Wang, Cuicui Lv
Summary: A method of preparing porous iron-nitrogen-doped carbon nanospheres using an inexpensive zinc-iron Prussian blue analogue as the precursor was proposed in this study, which significantly improves the performance of activated carbon air-cathode microbial fuel cells.
JOURNAL OF POWER SOURCES
(2021)
Article
Biochemistry & Molecular Biology
Alessandro Iannaci, Swapnil Ingle, Carlota Dominguez, Mariangela Longhi, Odile Merdrignac-Conanec, Soraya Ababou-Girard, Frederic Barriere, Paula E. Colavita
Summary: Nanostructured electrocatalysts using Fe/N-carbon were found to have better performance and cost-effectiveness compared to Pt/C cathodes in microbial fuel cells. The optimized nanocarbon scaffold resulted in a 25% increase in maximum power densities at a fraction of the material costs.
BIOELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Bolong Jiang, Decheng Lu, Nan Jiang, Hailin Jiang, Lihua Qi, Shunjie Shi, Yanyan Cui, Weiqiang Tan
Summary: The efficient oxygen reduction reaction (ORR) in microbial fuel cells (MFCs) can be achieved by using N-doped transition metal oxides as catalysts. In this study, non-precious N-doped Fe3O4/CoO@NC-T catalysts were prepared using a two-step strategy and showed exceptional ORR activity. Among the catalysts, Fe3O4/CoO@NC-750 exhibited the best performance with superior power density and electrochemical stability compared to commercial Pt/C catalyst in MFCs.
Article
Agricultural Engineering
Ji Eun Kim, Shashi Kant Bhatia, Hak Jin Song, Eunjin Yoo, Hyeon Jin Jeon, Jae-Yoon Yoon, Yunjeong Yang, Ranjit Gurav, Yung-Hun Yang, Hyung Joo Kim, Yong-Keun Choi
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Yong-Keun Choi, Tae-Rim Choi, Ranjit Gurav, Shashi Kant Bhatia, Ye-Lim Park, Hyung Joo Kim, Eunsung Kan, Yung-Hun Yang
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Chemistry, Multidisciplinary
Yong-Keun Choi, Ranjit Gurav, Hyung Joo Kim, Yung-Hun Yang, Shashi Kant Bhatia
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Chemical
Balashanmugam Pannerselvam, Prabhu Durai, Devasena Thiyagarajan, Hak Jin Song, Kwang Jin Kim, Yun Seok Jung, Hyung Joo Kim, Senthil Kumaran Rangarajulu
Article
Biotechnology & Applied Microbiology
Kalishwaralal Kalimuthu, Ji Min Kim, Chandramohan Subburaman, Woo Young Kwon, Sung Hyun Hwang, Sehan Jeong, Min Geun Jo, Hyung Joo Kim, Ki Soo Park
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
(2020)
Article
Biotechnology & Applied Microbiology
Jae-Yoon Yoon, Ji Eun Kim, Hak Jin Song, Kyung Bin Oh, Jeong Wook Jo, Yung-Hun Yang, Sang Hyun Lee, Gwangnam Kang, Hyung Joo Kim, Yong-Keun Choi
Summary: This study evaluated the adsorptive behaviors of grape pomace-derived biochar for the removal of the pesticide cymoxanil. Biochar produced at low pyrolytic temperature showed the highest cymoxanil adsorption capacity at pH 7, attributed to a combination of metal and hydrophilic interactions. The pseudo-second order kinetics and Freundlich isotherm model were found to be the best fit for the adsorption process.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Chemical
Balashanmugam Pannerselvam, Devasena Thiyagarajan, Annamalai Pazhani, Kalaichelvan Pudupalayam Thangavelu, Hyung Joo Kim, Senthil Kumaran Rangarajulu
Summary: In this study, plant-mediated silver nanoparticles were synthesized using Copperpod plant leaf extracts, which showed significant anti-cancer properties against various cancerous cells. The nanoparticles exhibited cytotoxic effects with IC50 values ranging from 53 to 69 μg/mL, and apoptosis was induced in cancer cells through DNA fragmentation technique.
Article
Environmental Sciences
Jin Sun Cha, Seong-Ho Jang, Su Shiung Lam, Hyungjoo Kim, Young-Min Kim, Byong-Hun Jeon, Young-Kwon Park
Summary: Biochar produced from pyrolysis of Kraft lignin, modified with CO2 and impregnated with FeOx, showed improved physicochemical properties and arsenic (V) adsorption performance. Among the tested biochars, FeOx-LC-800 displayed the highest adsorption efficiency for arsenic (V) due to its highest Fe-O intensity and large surface area. The Langmuir adsorption model was suitable for fitting the adsorption curve, with a calculated theoretical equilibrium adsorption amount (q(e)) of 6.8 mg/g using a pseudo-second-order kinetic model.
Article
Biochemical Research Methods
Yunjeong Yang, Ji Eun Kim, Hak Jin Song, Eun Bin Lee, Yong-Keun Choi, Jeong Wook Jo, Hyeon Jin Jeon, Ho Hyun Kim, Kwang Jin Kim, Hyung Joo Kim
Summary: The study developed a non-invasive monitoring system using a coil probe to detect water content variation in live plants. The results showed noticeable SWR changes at various frequencies when water was added to experimental plants under drought conditions. Using a fixed frequency, a more comprehensive monitoring of water content variation within a plant and the effect of illumination on water content was achieved.
Article
Engineering, Chemical
Gayathri Vijayakumar, Hindhuja Kesavan, Anisha Kannan, Dhanalakshmi Arulanandam, Jeong Hee Kim, Kwang Jin Kim, Hak Jin Song, Hyung Joo Kim, Senthil Kumaran Rangarajulu
Summary: The study focused on the biogenic synthesis of copper nanoparticles using different spice extracts, demonstrating the antibacterial properties of CuNPs formulated with spices. Among the three spice extracts, star anise showed the highest antibacterial activity, suggesting the potential therapeutic applications of CuNPs phyto-formulated with spice extracts.
Article
Engineering, Environmental
Hak Jin Song, Ranjit Gurav, Shashi Kant Bhatia, Eun Bin Lee, Hyung Joo Kim, Yung-Hun Yang, Eunsung Kan, Ho Hyun Kim, Sang Hyun Lee, Yong-Keun Choi
Summary: This study investigated the adsorption behaviors of microcystin-LR on pristine biochars derived from various waste biomass, with KB biochar prepared at 750 degrees C showing the highest adsorption capacity. The results suggest that KB biochar could be an effective and cheap adsorbent for removing microcystin-LR from wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Plant Sciences
Yong-Keun Choi, Hak-Jin Song, Jeong-Wook Jo, Seong-Won Bang, Byung-Hoon Park, Ho-Hyun Kim, Kwang-Jin Kim, Na-Ra Jeong, Jeong-Hee Kim, Hyung-Joo Kim
Summary: This study investigated the impact of watering, drought, and illumination conditions on PM2.5 removal in a plant-based biofilter system. The findings suggest that under drought with constant light condition, the highest PM2.5 removal efficiency and leaf characteristics changes were observed.
Article
Polymer Science
Saerom Park, Jeong Woo Lee, Ji Eun Kim, Gwangnam Kang, Hyung Joo Kim, Yong-Keun Choi, Sang Hyun Lee
Summary: Alginate/biochar hydrogel beads were prepared and used for the removal of Cu2+ and benzene from wastewater. The results showed that the adsorption capacities for Cu2+ and benzene were improved with increasing alginate and biochar content. The adsorption behavior of the hydrogel beads was similar in the concurrent system compared to the single pollutant system. The kinetics and isotherm studies followed the pseudo-second-order model and Langmuir model. In addition, the hydrogel beads exhibited high reusability.
Article
Infectious Diseases
Gayathri Vijayakumar, Hyung Joo Kim, Senthil Kumaran Rangarajulu
Summary: In this study, probiotic bacteria were used to synthesize silver nanoparticles with significant antioxidant and antibacterial activities. The biosynthesized AgNPs showed significant wound-healing capabilities, as observed through an in vitro scratch-wound assay. Cytotoxic experiments demonstrated that the biosynthesized AgNPs were not extremely hazardous to fibroblast cells.
Article
Biochemistry & Molecular Biology
Hak Jin Song, Sung Woo Yang, Jeong Wook Jo, Yong-Keun Choi, Im-Soon Lee, Byung Uk Lee, Sang Hyun Lee, Ho Hyun Kim, Kwang Jin Kim, Hyung Joo Kim
Summary: The control of indoor particles using plants has become an area of interest due to global air pollution and the spread of pandemic-causing viruses. However, the interaction between human pathogenic viruses (HPVs) and live plants has not been extensively studied due to difficulties in detecting small amounts of infectious viruses and the lack of suitable examination methods. This study examined the effect of submerged leaves of live plants on HPVs in water, with promising results showing a decrease in virus concentrations within 72 hours.
PLANT SIGNALING & BEHAVIOR
(2023)