Article
Environmental Sciences
Jaidev Kaushik, Gunture, Kumud Malika Tripathi, Ravindra Singh, Sumit Kumar Sonkar
Summary: A simplified approach for functionalization was used to fabricate thiourea-functionalized-Graphene Aerogel (t-GA). The t-GA showed bright yellow fluorescence and was capable of specific and selective detection of toxic lead (Pb(II)) metal ions with high aqueous solubility and photostability. Additionally, t-GA demonstrated potential for sensing hydrogen peroxide and acting as a yellow fluorescent ink.
Article
Engineering, Chemical
Yujing Wang, Jian Chen, Junxia Gao, Hongshan Meng, Shouning Chai, Yanfei Jian, Limin Shi, Yanbin Wang, Chi He
Summary: The novel cathode made of macroporous graphene aerogel displayed excellent electrocatalytic activity in the electro-Fenton system, efficiently generating H2O2 for antibiotic degradation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ding Zhang, Constantine Tsounis, Zhipeng Ma, Dominique Djaidiguna, Nicholas M. Bedford, Lars Thomsen, Xunyu Lu, Dewei Chu, Rose Amal, Zhaojun Han
Summary: A metal-free edge-rich vertical graphene catalyst has been synthesized and exhibits superior performance for hydrogen peroxide production in alkaline media. By tailoring oxygen-containing functional groups and developing a vacuum-based method to enhance surface wettability, gas diffusion rate has been greatly improved without compromising Faradaic efficiency.
Article
Chemistry, Multidisciplinary
Shazia Nabi, Feroz Ahmad Sofi, Nusrat Rashid, Pravin P. Ingole, Mohsin Ahmad Bhat
Summary: The study presents a simple in situ self-assembly approach to craft a Cu-MOF@S-Gr composite with high conductivity and electrochemical sensing capabilities for biologically important molecules. Structural characterization and electrochemical investigations revealed that S-Gr sheets induce directional growth of MOF crystals, providing numerous electroactive sites and facilitating faster electron transfer and mass transfer. The hybrid nanocomposite demonstrated excellent conductivity, electrocatalytic activity, and electroanalytical utility towards selective and sensitive sensing of AC, DA, and H2O2.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Lidia Magerusan, Florina Pogacean, Maria-Loredana Soran, Stela-Maria Pruneanu
Summary: This study reports a new electroanalytical approach for the quantification of ferulic acid in commercial pharmaceutical samples using a sulphur-doped graphene-based electrochemical sensing platform. The developed modified electrode showed a low limit of detection and excellent stability and reproducibility.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Analytical
Yanyan Zhu, Xiaowei Ma, Xueyi Lv, Lina Zhang, Chao Li, Ningning Shi, Jing Wang
Summary: A highly efficient and durable 2D-layered nickel cobalt phosphide nanosheet, confined by 3D graphene frameworks, exhibits remarkable electroactivity towards hydrogen peroxide and has broad prospects in the field of electrochemistry, especially in biosensing applications.
Article
Engineering, Electrical & Electronic
Xiangle Meng, Xiuxiu Dong, Dong Liu, Qijian Niu, Shun Lu, Tianyan You
Summary: In this study, a sensitive electrochemical sensor based on manganese dioxide@nitrogen-doped graphene was developed for detecting the concentration of Zn2+. The sensor exhibited excellent performance and reproducibility, and was successfully applied in practical sample analysis.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Physical
Nebras Sobahi, Mohd Imran, Mohammad Ehtisham Khan, Akbar Mohammad, Md. Mottahir Alam, Taeho Yoon, Ibrahim M. Mehedi, Mohammad A. Hussain, Mohammed J. Abdulaal, Ahmad A. Jiman
Summary: We synthesized Fe3O4/graphene nanocomposite for peroxide sensor with high selectivity and sensitivity. The nanocomposites were produced through a modified co-precipitation method and characterized using various techniques. The as-fabricated flexible electrode showed excellent electrocatalytic activity and exhibited a good linear range, high sensitivity, and low detection limit for H2O2 detection. The biosensor is cost-effective, stable, and highly reproducible.
Article
Chemistry, Multidisciplinary
Zi-Hao Fu, Hao-Dong Tian, Shao-Fei Ni, James S. Wright, Ming Li, Li-Rong Wen, Lin-Bao Zhang
Summary: In this electrochemical protocol, NaCl serves as both an electrolyte and a redox mediator for the selective oxidation of sulfides to sulfoxides. Using traceless electrons as an ideal oxidant, this method offers good to excellent yields of sulfoxides at ambient temperature, while being environmentally friendly and compatible with sensitive functional groups. The cost-effective graphite felt electrodes can be reused multiple times without loss of activity, allowing for scalability of the methodology.
Review
Chemistry, Multidisciplinary
Yuli Wei, Wu Yang, Hao Guo
Summary: Currently, covalent organic frameworks (COFs), a type of novel crystalline porous materials composed of organic structural blocks with light elements, have shown great potential in electrochemical sensing applications. They possess unique advantages such as regular porosity, large specific surface area, periodic ordered structure, extended π-conjugated system, abundant functional groups, and excellent thermal and chemical stability. However, there are still challenges to be addressed, including improving electric conductivity and enhancing selectivity. This article provides a detailed summary and review of recent advances in the construction of two-dimensional functional COFs materials for electrochemical sensing applications, including design strategies, preparation methods, modification considerations, sensing principles, and analytical applications, while also proposing future prospects and outlooks.
Article
Chemistry, Multidisciplinary
Si-Woo Park, Byungkwon Jang, Han Kim, Jimin Lee, Ji Young Park, Sung-Oong Kang, Yong-Ho Choa
Summary: This study presents a method for producing water-dispersible graphene through in situ sulfate functionalization of graphite under alkaline electrochemical conditions, resulting in graphene with low oxygen content, high crystalline basal planes, and excellent dispersion stability.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Zhong-Wei Hou, Ding-Jin Liu, Peng Xiong, Xiao-Li Lai, Jinshuai Song, Hai-Chao Xu
Summary: This study reports a site-selective electrochemical amination reaction that can convert benzylic C-H bonds into C-N linkages without the need for external oxidants or metal catalysts. The success lies in using HFIP as a co-solvent to modulate the oxidation potentials of the substrate and product, avoiding overoxidation of the latter.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Xue-Bo Hu, Ning Shang, Xiao-Hui Chen, Zi-He Jin, Meng-Yuan He, Tian Gan, Yan-Ming Liu
Summary: We have successfully constructed a 3D integrated platform that combines cell culture and electrochemical monitoring, showing excellent performance in both aspects. This platform has great potential for further cancer-related disease diagnosis or drug screening.
Article
Chemistry, Organic
Laiqiang Li, Zhong-Wei Hou, Pinhua Li, Lei Wang
Summary: An electrochemical method has been developed for the site-selective C-H cyanation of indoles using readily available TMSCN as the cyano source. The use of tris(4-bromophenyl)amine as a redox catalyst results in better yield and regioselectivity, leading to satisfactory yields of both C2- and C3-cyanated indoles. The reactions are conducted in a simple undivided cell at room temperature, eliminating the need for transition-metal reagents and chemical oxidants.
Article
Nanoscience & Nanotechnology
Rafael T. P. da Silva, Maria Paula de Souza Rodrigues, Gabriela F. B. Davilla, Adriano M. R. P. da Silva, Andre H. B. Dourado, Susana Cordoba de Torresi
Summary: In this study, AgAu bimetallic hollow nanoshells were synthesized in situ over layered graphene oxide and silica submicrospheres, and utilized as peroxidase-like nanozymes in plasmon-enhanced electrochemical sensing of H2O2. The nanozymes exhibited increased sensitivity to hydrogen peroxide under laser irradiation matching the LSPR band maximum for each synthesized structure, showing enhanced electron transfer rates and improved substrate affinity.
ACS APPLIED NANO MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Maomao Xie, Meng Gao, Yang Yun, Martin Malmsten, Vincent M. M. Rotello, Radek Zboril, Omid Akhavan, Aliaksandr Kraskouski, John Amalraj, Xiaoming Cai, Jianmei Lu, Huizhen Zheng, Ruibin Li
Summary: Antimicrobial resistance (AMR) is a major threat to the environment and health, and antimicrobial nanomaterials are being explored as alternatives to conventional antibiotics. Some antimicrobial nanomaterials show AMR-independent antimicrobial effects, while others trigger the evolution of AMR. This review compares the mechanisms and relationships of antibiotics and antimicrobial nanomaterials, examines nano-microbe interactions, and provides an outlook on future antimicrobial nanomaterials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Puning Ren, Zhuyan Gao, Tiziano Montini, Zhitong Zha, Na Ta, Yike Huan, Nengchao Luo, Emiliano Fonda, Paolo Fornasiero, Feng Wang
Summary: Biomass reforming using solar energy allows for the production of green hydrogen. Current biomass photoreforming inefficiently produces hydrogen due to intermittent solar light and incomplete degradation of biomass C-C bonds. This study overcomes these issues by converting carbohydrates into liquid hydrogen carriers (LHCs) suitable for transportation. The LHCs are then fully decomposed, releasing only H2 and CO2. By prioritizing complete scission of carbohydrate C-C bonds, this process yields 44 g of H2 per kg of glucose. This work demonstrates the production and storage of hydrogen through the complete breakdown of biomass C-C bonds.
Article
Chemistry, Multidisciplinary
Olivier Henrotte, Eva Yazmin Santiago, Artur Movsesyan, Luca Mascaretti, Morteza Afshar, Alessandro Minguzzi, Alberto Vertova, Zhiming M. Wang, Radek Zboril, Stepan Kment, Alexander O. Govorov, Alberto Naldoni
Summary: The investigation of photocatalytic systems at the nanoscale is crucial for understanding their fundamental principles, improving their design, and enhancing their applicability. A photochemical nanoscopy technique has been developed to detect the molecular products of plasmonic hot-carrier-driven photocatalytic reactions with nanometric precision. Applying this methodology to Au/TiO2 plasmonic photocatalysts, it was discovered that smaller and denser Au nanoparticle arrays have lower optical contribution but higher quantum efficiency in hot-hole-driven photocatalysis, which is closely related to population heterogeneity. This study also revealed the areas of oxidation and reduction product evolution in a single plasmonic nanodiode, demonstrating the bipolar behavior of such nanosystems. These findings enable quantitative investigations at the nanoscale to evaluate the photocatalytic reactivity of low-dimensional materials in various chemical reactions.
Review
Chemistry, Multidisciplinary
Iosif Tantis, Smita Talande, Vasileios Tzitzios, Georgia Basina, Vishal Shrivastav, Aristides Bakandritsos, Radek Zboril
Summary: This review focuses on recent advances in electrochemical energy storage (EES) technologies related to 2D crystals originating from non-layered 3D solids (non-van der Waals; nvdW) and their influence on the materials' features. The methods and challenges in top-down and bottom-up strategies towards nvdW 2D sheets and their applications in EES are discussed. Moreover, the opportunities and challenges of nvdW 2D systems in various applications are highlighted.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Tomas Malina, Cordula Hirsch, Alexandra Rippl, David Panacek, Katerina Polakova, Veronika Sedajova, Magdalena Scheibe, Radek Zboril, Peter Wick
Summary: Graphene oxide (GO) is a promising delivery nanoplatform, but its non-specific surface properties and heterogeneity in stability limit its commercial application. Evaluating the interaction of emerging graphene derivatives with endothelial and immune cells is important. The study demonstrated that graphene acid (GA) and cyanographene (GCN) have better biocompatibility and potential for drug/gene delivery compared to GO.
Article
Multidisciplinary Sciences
Aby Cheruvathoor Poulose, Miroslav Medved, Vasudeva Rao Bakuru, Akashdeep Sharma, Deepika Singh, Suresh Babu Kalidindi, Hugo Bares, Michal Otyepka, Kolleboyina Jayaramulu, Aristides Bakandritsos, Radek Zboril
Summary: This study presents a reusable graphene catalyst that can convert glycerol, produced from biomass fermentation, to high-value chemicals at room temperature without solvents. The catalyst shows excellent activity and selectivity for glycerol conversion to solketal, and it can also convert oils to biodiesel.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Arianna Actis, Michele Melchionna, Giacomo Filippini, Paolo Fornasiero, Maurizio Prato, Mario Chiesa, Enrico Salvadori
Summary: Time-resolved EPR technique was used to study the formation of well-defined spin triplet excitons in carbon nitride. The mobility of the triplet excitons was revealed through the analysis of temperature-dependent TR-EPR signal. It was found that the energy of the spin triplet is approximately 0.2 eV higher than the conduction band edge, suggesting the inversion of singlet-triplet in carbon nitride materials. This study provides important insights into the response of carbon nitride to light and the nature of photoexcited states.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Petr Rozhin, Simone Adorinni, Daniel Iglesias, Tino Mackiol, Slavko Kralj, Matteo Bisetto, Michela Abrami, Mario Grassi, Manuela Bevilacqua, Paolo Fornasiero, Silvia Marchesan
Summary: Carbon nanostructures are modified to improve their dispersibility in aqueous conditions and favor the formation of hydrogels. The morphology and functionalization effects of the nanostructures are studied to understand their impact on the self-healing ability of the hydrogel and peptide fibrillation in aqueous buffer.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mario Daka, Tiziano Montini, Paolo Pengo, Giovanna Marussi, Matteo Crosera, Gianpiero Adami, Juan Jose Delgado, Giuliano Giambastiani, Pierre Fertey, Emiliano Fonda, Lucia Pasquato, Paolo Fornasiero
Summary: This study describes the development of a highly active and reusable palladium-based catalyst on alumina (Pd8/Al2O3), which utilizes an octanuclear tiara-like palladium complex as the precursor to produce isolated Pd clusters of approximately 1 nm in size on Al2O3. The catalyst exhibits high specific activity, allowing for completion of the cross-coupling reaction in 30 min with only 0.12 mol % Pd loading under very mild and green reaction conditions.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Olivier Henrotte, Stepan Kment, Alberto Naldoni
Summary: The impact of surface defects on the photoactivity of plasmonic hybrid nanostructures was investigated using scanning photoelectrochemical microscopy (SPECM). It was found that mild reduction treatment significantly enhances the photoactivity of TiO2 ultrathin films under visible light. Plasmonic photoactivity mapping using Au nanoparticle arrays deposited on different reduced TiO2 films revealed the effect of interfacial defects on hot charge carriers and the role of electron leakage.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Chemistry, Physical
Babak Jaleh, Atefeh Nasri, Mahtab Eslamipanah, Mahmoud Nasrollahzadeh, Jacky H. Advani, Paolo Fornasiero, Manoj B. Gawande
Summary: Industrialization has led to increased demand for clean energy storage and conversion systems to reduce the use of environmentally harmful substances. Nature-inspired materials, with their extended porous architectures, high surface areas, and low cost, show great potential as catalysts and nanofillers in energy storage and conversion. This review summarizes the structure and classification of natural materials suitable for energy devices, focusing on their applications and advancements in fuel cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Rehan Anwar, Jan Navratil, Rajani K. Vijayaraghavan, Patrick J. McNally, Michal Otyepka, Piotr Blonski, M. Veronica Sofianos
Summary: The development of long-term renewable energy storage systems is crucial for a sustainable energy future. In this study, the use of CaZrO3 nanoadditives with tailored oxygen vacancies was investigated to improve the cycling performance of Limestone for long-term renewable energy storage. The sample mixed with 20% CaZrO3 nanoadditives showed the best performance, with enhanced ionic conductivity and the highest energy density values.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Yang Qiuyue, Emily P. Nguyen, David Panacek, Veronika Sedajova, Vitezslav Hruby, Giulio Rosati, de Carvalho Castro Silva Cecilia, Aristides Bakandritsos, Michal Otyepka, Arben Merkoci
Summary: Heavy metal pollutants are highly toxic and pose great concern in environmental monitoring. Electrochemical detection, hindered by mutual interferences of heavy metal ions, is a main technique with limited sensitivity to Cd2+ ions. This study introduces a metal-free and sustainable nanomaterial, cysteamine covalently functionalized graphene (GSH), which significantly enhances the sensitivity of screen-printed carbon electrode (SPCE) to Cd2+ ions while maintaining sensitivity to other heavy metals. The enhancement is attributed to the grafted thiols on the GSH sheets with strong affinity to Cd2+ ions, based on Pearson's principle. The GSH-modified SPCE also exhibits high reusability and outperforms existing SPCEs modified by non-covalently functionalized graphene derivatives. The GSH-SPCE is successfully validated in tap water.
Review
Chemistry, Multidisciplinary
Virender K. Sharma, Xingmao Ma, Radek Zboril
Summary: Water is a crucial component of the United Nations' sustainable development goals, and water reuse is becoming increasingly accepted in response to global water scarcity. However, traditional treatment processes face challenges in treating low concentrations of pollutants in the presence of other chemicals. Advanced oxidation processes and the use of single atom catalysts offer promising solutions to these challenges.
CHEMICAL SOCIETY REVIEWS
(2023)