Article
Materials Science, Multidisciplinary
Cheol-Hwi Kim, Seok In Kim, Fu Nan Ju, Yeon-Woo Cho, Huijung Kim, Joon-Ha Park, Kwang-Ho Lee, Hyungbin Son, Zhengtang Luo, Tae-Hyung Kim
Summary: A mildly reduced uniform graphene oxide thin film (mrUG) enriched with functional hydroxyl groups is effective for electrochemical H2O2 decomposition and detection.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Multidisciplinary
Zizhao Ding, Zuojuan Du, Yu Liu, Qiancheng Zhang, Zixiang Zhao, Mingming Hou, Xiangyu Wang, Yusuf Abdullahi Hassan, Xiaozhong Huang, Jianjing Yue, Ailiang Chen, Yutian Ma, Sujun Lu
Summary: In this study, a magnetic CoxOy/RGO composite material with wideband microwave absorbing capability was prepared using a simple hydrothermal and pyrolysis method. The optimum pyrolysis temperature was determined by analyzing the electromagnetic parameters, attenuation constants, and impedance matching of the composites at different temperatures. After heat treatment at 500 degrees C, the sample exhibited a minimum reflection loss of -67.2 dB and an effective absorbing bandwidth of 9.1 GHz, covering the whole X, Ku, and K bands. The excellent microwave absorption performance is attributed to the structure of cobalt nanospheres adjusting the effective dielectric constant of the material and the presence of CoO promoting dipole polarization and interfacial polarization process to improve impedance matching, thereby achieving a wider absorption effect.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Physical
Arijit Kapuria, Tapas Kumar Mondal, Bikash Kumar Shaw, Yan-Kuin Su, Shyamal K. Saha
Summary: Functionalized carbon based 2D materials show promise as low cost and environmentally friendly electrocatalysts for hydrogen evolution reaction (HER) and supercapacitor applications. Metal free polysulfide functionalized reduced graphene oxide (GPS) is successfully synthesized as an efficient HER electrocatalyst and energy storage device. The material exhibits high current density and specific capacitance due to the synergistic effect of the graphene network and polysulfide functionalizations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yingliang Feng, Sifan Zhang, Lihua Zhu, Guoda Li, Ning Zhao, Huan Zhang, Bing Hui Chen
Summary: Hydrogen energy has gained significant attention due to its high energy density and lack of carbon dioxide emissions, making it a valuable green energy source. Water electrolysis for hydrogen production offers great potential due to its cleanliness and lack of pollution. However, developing an efficient, stable, and cost-effective electrocatalyst remains a challenge. In this study, researchers have developed a reduced graphene oxide-supported ruthenium (Ru) nanoparticle electrocatalyst using a simple method. The Ru/rGO catalyst demonstrates excellent electrocatalytic activity and long-term stability for the hydrogen evolution reaction. It outperforms commercial Pt/C and other Ru/rGO catalysts in terms of performance. This work presents a new strategy for synthesizing efficient electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Na Li, Wenjun Yan, Yu Niu, Shijie Qu, Pingping Zuo, Hongcun Bai, Ning Zhao
Summary: The study presents a Cu-Cu2O@RGO nanocomposite formed in solution under simulated sunlight irradiation, offering advantages such as retained semiconductor characteristics, efficient electron transfer pathways, and chemical protection. These characteristics provide potential applications for enhancing photoelectrochemical and photocatalytic H-2 evolution.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yujia Huang, Min Wang, Yi Li, Shujia Yin, Hongwei Zhu, Chunlei Wan
Summary: In order to enhance the efficiency of hydrogen production, researchers have developed a novel and economical approach to prepare highly active, robust, and self-supported reduced graphene oxide/SiO2 ceramic composites as electrocatalysts for the hydrogen evolution reaction. By intercalating and pressure sintering the rGO sheets, the prepared composites demonstrate outstanding electrocatalytic performance with low overpotential, small Tafel slope, and excellent catalytic durability in acidic conditions. This study provides a cost-effective strategy for preparing metal-free, robust, and edge-rich rGO/ceramic composites as highly electrocatalytic active catalysts in hydrogen production applications.
Article
Materials Science, Multidisciplinary
Karthikeyan Sekar, Ahmed Kassam, Yang Bai, Ben Coulson, Wei Li, Richard E. Douthwaite, Keiko Sasaki, Adam F. Lee
Summary: Bismuth vanadate (BiVO4) is a widely studied photocatalyst for various applications, such as water depollution and hydrogen production. Among them, hierarchical BiVO4 plates decorated with nanoparticles (h-BiVO4) in contact with reduced graphene oxide (RGO) exhibit superior photocatalytic performance for bisphenol A degradation and hydrogen evolution under visible light irradiation.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Physical
Wei Li, Xiao Wang, Qiong Ma, Fei Wang, Xiao-shan Chu, Xue-chuan Wang, Chuan-yi Wang
Summary: This study successfully enhanced the hydrogen evolution activity under solar light by constructing a CdS@h-BN/rGO catalyst, which exhibited excellent photoresponse and interfacial conductivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
M. Pinzon, O. Aviles-Garcia, P. Sanchez, A. Romero, A. R. de la Osa, A. de Lucas-Consuegra
Summary: Novel ruthenium catalysts supported on reduced graphene oxide were synthesized and characterized for COx-free hydrogen generation via catalytic ammonia decomposition. The catalyst's properties were influenced by the metal loading and pre-reducing agent, with the optimal conditions resulting in a high ammonia conversion rate and hydrogen production rate.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Chemistry, Physical
Liangqing Hu, Kening Liu, Yanming Guo, Jing Feng, Xuejiao Ding, Weixia Li, Xiaojiang Su, Mingming Gao, Zhiyong Li, Hexin Zhang, Yueming Ren, Tong Wei
Summary: In this study, RGO/WOCu composite catalysts with abundant oxygen vacancies were prepared by the hydrothermal method, which showed enhanced performance in electrochemical nitrogen reduction reaction (NRR) under ambient conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Antony R. R. Thiruppathi, Joshua van der Zalm, Chi-Kai Hung, Aicheng Chen
Summary: A facile one-pot wet chemical synthesis was developed to prepare highly interconnected 3D reduced graphene oxide (3D-rGO) for supercapacitor applications. The optimized 3D-rGO exhibited a high C/O ratio, superior conductivity, and excellent energy storage performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Min Zhu, Qing Yan, Xiaojing Bai, Hao Cai, Jing Zhao, Yongde Yan, Kai Zhu, Ke Ye, Jun Yan, Dianxue Cao, Guiling Wang
Summary: Hydrogen evolution reaction (HER) is a promising technology for addressing energy issues, and the catalyst CoSe2-MoSe2(1-1)/rGO exhibits impressive performance in both acidic and alkaline conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jiangwen Bai, Changheng Chen, Jiming Zheng, Chongfeng Guo
Summary: This study presents the construction of efficient photocatalysts by implanting ferroelectric materials, which achieves excellent performance. The results show that doping La3+ ions can lead to an enlarged ferroelectric polarization, thereby improving the photocatalytic performance.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Analytical
Runmin Song, Zhanhong Li, Rupesh K. Mishra, Pengju Wei, Xueling Zhao, Zhigang Zhu
Summary: This work presents a simple method to fabricate an octahedral cuprous oxide (Cu2O) decorated two-dimensional (2D) flexible rGOP electrode and characterizes its high electrocatalytic activity. The electrode was successfully used for H2O2 detection in milk samples to prevent spoilage.
Article
Nanoscience & Nanotechnology
Salim Caliskan, Anqi Wang, Fen Qin, Stephen D. House, Jung-Kun Lee
Summary: In this study, molybdenum carbide nanoparticles and molybdenum carbide-reduced graphene oxide nanocomposites were synthesized using a facile, microwave-assisted solvothermal method at elevated temperatures. The optimized nanocomposite catalysts showed excellent performance for the hydrogen evolution reaction in acidic media.
ACS APPLIED NANO MATERIALS
(2022)
Article
Multidisciplinary Sciences
Ramin Abolfath, Christopher R. Peeler, Mark Newpower, Lawrence Bronk, David Grosshans, Radhe Mohan
SCIENTIFIC REPORTS
(2017)
Article
Chemistry, Physical
Ramin M. Abolfath, P. K. Biswas, R. Rajnarayanam, Thomas Brabec, Reinhard Kodym, Lech Papiez
JOURNAL OF PHYSICAL CHEMISTRY A
(2012)
Article
Physics, Multidisciplinary
Ramin M. Abolfath, Anna Trojnar, Bahman Roostaei, Thomas Brabec, Pawel Hawrylak
NEW JOURNAL OF PHYSICS
(2013)
Article
Physics, Multidisciplinary
Ramin M. Abolfath, Marek Korkusinski, Thomas Brabec, Pawel Hawrylak
PHYSICAL REVIEW LETTERS
(2012)
Article
Engineering, Biomedical
Ramin M. Abolfath, David J. Carlson, Zhe J. Chen, Ravinder Nath
PHYSICS IN MEDICINE AND BIOLOGY
(2013)
Article
Radiology, Nuclear Medicine & Medical Imaging
Ramin Abolfath, Chris Peeler, Dragan Mirkovic, Radhe Mohan, David Grosshans
Article
Radiology, Nuclear Medicine & Medical Imaging
Ramin Abolfath, Yusuf Helo, David J. Carlson, Robert Stewart, David Grosshans, Radhe Mohan
Article
Radiology, Nuclear Medicine & Medical Imaging
Ramin Abolfath, David Grosshans, Radhe Mohan
Article
Oncology
Alejandro Bertolet, Ramin Abolfath, David J. Carlson, Robert A. Lustig, Christine Hill-Kayser, Michelle Alonso-Basanta, Alejandro Carabe
Summary: This study aimed to investigate the correlation between imaging changes in brain normal tissue and the spatial distribution of linear energy transfer (LET), as well as the correlation between normal tissue complication probability and LET for a cohort of meningioma patients treated with scanned proton beams. The results showed that patients with higher LET values in imaging change regions had shallower targets for treatment and used fewer beams and angles. Most patients did not show spatial correlation between their image changes and LET values.
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
(2022)
Article
Pharmacology & Pharmacy
Huagang Yan, David J. Carlson, Ramin Abolfath, Wu Liu
Summary: The study investigates the microdosimetric consequences of Auger cascades in high atomic number nanoparticles (NPs) using the Bomb model, proposing a potential framework for explaining NP radiosensitization. Experimental data and calculations showed discrepancies in the relative biological effectiveness (RBE) and increases in alpha, indicating limitations in current models. The application of the Bomb model suggests a promising approach to describing NP-related radiosensitization at low concentrations.
Article
Engineering, Biomedical
Ramin Abolfath, Alexander Baikalov, Stefan Bartzsch, Niayesh Afshordi, Radhe Mohan
Summary: This study presents a microscopic mechanism that explains the outward burst of 'cold' ion species in high-energy particle tracks. The interaction between 'hot' non-ion species and 'cold' ion species is mediated by acoustic phonons, allowing the conversion of thermal energy to kinetic energy. The results of simulations and analysis demonstrate the transport and diffusion of thermal energy in the track structures.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Multidisciplinary Sciences
K. C. Santosh, Ramin Abolfath
Summary: This study presents a precise quantification of the fragmentation mechanisms of DNA and surrounding molecules under radiation conditions, providing comprehensive information on the impact of bond dissociations and DNA damage. The hydrogen contents of the molecules significantly control the stability in the presence of radiation.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Ramin Abolfath, Alexander Baikalov, Alberto Fraile, Stefan Bartzsch, Emil Schueler, Radhe Mohan
Summary: The study proposes a theory based on the topology and geometry of diffusion channels in tissue to enhance the understanding of normal tissue sparing at ultra-high dose rates (UHDRs) and investigates the interaction between intra- and inter-track radical recombination through a reaction-diffusion mechanism. The time evolution of particle track structures is calculated using a random network designed for molecular transport in porous and disordered media, representing intra- and inter-cellular diffusion channels in tissues.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Alexander Baikalov, Ramin Abolfath, Emil Schueler, Radhe Mohan, Jan J. Wilkens, Stefan Bartzsch
Summary: The mechanism responsible for the FLASH effect in radiotherapy remains unknown, but crucial to its clinical translation. The potential role of intertrack interactions in the FLASH effect has been widely discussed, but its influence is still uncertain.
FRONTIERS IN PHYSICS
(2023)
