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
Manuel Vazquez Sulleiro, Aysegul Develioglu, Ramiro Quiros-Ovies, Lucia Martin-Perez, Natalia Martin Sabanes, Maria Lourdes Gonzalez-Juarez, I. Jennifer Gomez, Mariano Vera-Hidalgo, Victor Sebastian, Jesus Santamaria, Enrique Burzuri, Emilio M. Perez
Summary: The research successfully achieved the coupling of 2H-MoS2 and graphene in field-effect transistors through covalent grafting, providing the possibility of functionalizing multiple devices.
Article
Chemistry, Multidisciplinary
Iosif Tantis, Aristides Bakandritsos, Dagmar Zaoralova, Miroslav Medved, Petr Jakubec, Jana Havlakova, Radek Zboril, Michal Otyepka
Summary: The cathode material, where sulfur is covalently bonded on graphene, exhibits high sulfur content and excellent electro-chemical performance. The use of electrolyte additives further enhances the performance and cycling stability of lithium-sulfur batteries.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Electrochemistry
Thi Mien Trung Huynh, Tan Lam Nguyen, Thanh Hai Phan
Summary: Robust engineering of surface properties is crucial for improving the overall physicochemical behaviors of layered materials like graphene for high-end applications. In this study, covalent functionalization of graphitic surfaces was achieved through electrografting with 4-(1H-1,2,4-triazol-1-ylmethyl) diazonium. The degree of functionalization depended on the concentration of 4-TYD, with full monolayer coverage achieved at 1 mM concentration. The electrografted layer could be removed by thermal annealing, providing a controlled approach for anchoring bioactive compounds onto graphene and other 2D materials.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Ruben Canton-Vitoria, Ajyal Z. Alsaleh, Georgios Rotas, Yusuke Nakanishi, Hisanori Shinohara, Francis D'Souza, Nikos Tagmatarchis
Summary: In this article, the versatility of free-base and zinc-metallated porphyrin to combine with boron azadipyrromethene NIR absorbing species and anchor onto graphene was introduced. The results showed that the zinc-metallated porphyrin confirmed additional charge separation between the chromophores, while graphene acted as an electron donor in the hybrids, forming charge-separated states at an ultrafast timescale. These donor-acceptor systems featuring graphene as an electron donor have potential applications in optoelectronics.
Article
Crystallography
Thi Mien Trung Huynh, Duy Dien Nguyen, Nhat Hieu Hoang, Thanh Hai Phan
Summary: This study demonstrates systematic exploration of the reversible covalent functionalization of a highly oriented pyrolytic graphite (HOPG) surface using 3,5-trifluoromethyl benzenediazonum (3,5-TFD) and various experimental techniques. The degree of functionalization can be controlled by varying the concentration of 3,5-TFD. The covalently functionalized layer can be locally or globally removed, leaving behind defect-free graphitic surfaces. These findings open up new possibilities for reversible and robust functionalization of graphene and other 2D materials for diverse high-end applications.
Article
Chemistry, Applied
Asaithampi Ganesan, Ali Husain, Mathew Sebastian, Saad Makhseed
Summary: Improving the non-linear absorption properties of graphene materials is crucial for optical limiting applications. The hybrid materials formed by non-covalent functionalisation of graphene nanoplatelets with pyrene-conjugated Zn(II) phthalocyanines and azaphthalocyanines show promising non-linear optical characteristics, such as three-photon absorption behavior and unique optical limiting performance. These hybrid structures offer a way to achieve large effective three-photon absorption coefficients and nearly constant optical limitation across a wide intensity range, which would be highly beneficial for non-linear photonic applications.
Article
Chemistry, Multidisciplinary
Dayong Li, Yuling Shao, Haibo Ke, Shengquan Chang, Yong Kou, Lei Xiao, Gazi Hao
Summary: In this study, a new covalently modified energetic graphene oxide (CMGO) was successfully synthesized by introducing 4-amino-1,2,4-triazole onto GO sheets. CMGO/CuO composite exhibited superior catalytic effect on the thermal decomposition of ammonium perchlorate (AP) compared to GO/CuO. The results demonstrated that CMGO/CuO can enhance the heat release and decrease the decomposition temperature of AP.
Article
Chemistry, Multidisciplinary
Demetrios D. Chronopoulos, Christina Stangel, Magdalena Scheibe, Klara Cepe, Nikos Tagmatarchis, Michal Otyepka
Summary: A new material was synthesized by combining fullerene and graphene, which are non-metal covalent hybrids. The material showed excellent electrocatalytic performance and durability for the hydrogen evolution reaction, attributed to intrahybrid charge-transfer phenomena.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Sonia Freddi, Miriam C. Rodriguez Gonzalez, Andrea Casotto, Luigi Sangaletti, Steven De Feyter
Summary: This study presents an efficient functionalization method to modify graphene layers and assemble them into an electronic nose for the discrimination of nitrogen dioxide. Through multivariate statistical analysis, the electronic nose demonstrates the ability to discriminate NO2 from interfering gases.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
S. Alipour, M. Hassani, S. M. H. Hosseini, S. M. Mousavi-Khoshdel
Summary: This article presents a fast and easy method for in situ reducing and functionalizing graphene oxide, and investigates the synthesized materials using various characterization techniques. The results indicate significant differences in photocurrent response and electrochemical behavior compared to graphene after reduction and functionalization.
Article
Thermodynamics
Hojjat Alizadeh, Hadi Pourpasha, Saeed Zeinali Heris, Patrice Estelle
Summary: This study investigated the effect of adding covalently functionalized and non-covalently functionalized multi-walled carbon nanotubes on the breakdown voltage and thermal properties of transformer oil. The results showed that the covalently functionalized MWCNTs-OH/transformer oil nanofluid exhibited better thermal performance and breakdown voltage characteristics, making it suitable for preventing transformer overheating and serving as electrical insulation.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Iwona Janica, Veronica Montes-Garcia, Francesca Urban, Payam Hashemi, Ali Shaygan Nia, Xinliang Feng, Paolo Samori, Artur Ciesielski
Summary: Transition metal carbides and nitrides (MXenes) are a class of 2D materials with remarkable physicochemical properties. The covalent functionalization of MXenes has been explored through diazonium salt grafting and silylation reactions. An unprecedented two-step functionalization of Ti3C2Tx MXenes is reported, where (3-aminopropyl)triethoxysilane is covalently tethered to Ti3C2Tx and serves as an anchoring unit for subsequent attachment of various organic bromides via the formation of C-N bonds.
Article
Chemistry, Analytical
Shixing Chao, Yifeng Zhao, Yuanjie Zhu, Weiqiang Zhou, Danhua Zhu, Yanmei Liang, Danqin Li, Yanli Wu, Yao He, Jingkun Xu, Peipei Liu
Summary: The immobilization of capsaicin molecules on the graphene surface improves the capacitance performance of nitrogen-doped graphene through non-covalent modification. The resulting Cap-functionalized NG shows high capacitance and excellent cycling life, making it a promising material for energy storage. In addition, density functional theory calculations provide insights into the mechanism of pseudocapacitance and the adsorption configuration of Cap on NG.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
E. H. Lock, J. C. Prestigiacomo, P. Dev, A. Nath, R. L. Myers-Ward, T. L. Reinecke, D. K. Gaskill, M. S. Osofsky
Summary: Graphene, as the first isolated two-dimensional material, possesses unique properties that have captivated researchers for the last decade, including large electronic mobilities and tunable electrical properties via electrostatic gating. Functionalization of graphene, both covalent and non-covalent, leads to enhanced mobilities and the observation of quantum transport phenomena previously unseen in unfunctionalized graphene.
Article
Chemistry, Multidisciplinary
Yujie Ma, Xiaoyan Liu, Xindong Wei, Jiamei Le, Yi Fu, Qiuqin Han, Houlin Ji, Zhi Yang, Hailong Wu
Summary: In this study, a series of yolk-shelled Au@Cu2O composites were synthesized using Au NPs, Au NRs, and Au NBPs for the first time. The yolk-shelled composites showed significantly higher photocatalytic activity compared to solid-shelled ones and pure Cu2O. Notably, yolk-shelled Au NR@Cu2O and Au NBP@Cu2O composites exhibited excellent near-infrared light-driven photocatalytic activity, which was not achievable with Au NP@Cu2O and pure Cu2O.
Article
Nanoscience & Nanotechnology
Feng Shao, Hong Li, Lu Yao, Shiwei Xu, Gang Li, Bin Li, Cheng Zou, Zhi Yang, Yanjie Su, Nantao Hu, Yafei Zhang
Summary: In this study, a flexible graphene-fiber-fabric-based three-dimensional conductive network was designed to create a binder-free and self-standing silicon anode, demonstrating excellent battery performance. The GFF/Si-37.5% and GFF/Si-29.1% electrodes exhibited outstanding performance in terms of cyclability and reversible capacity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Huan Yin, Luoxi Zhang, Mingkui Zhu, Yue Chen, Tian Tian, Yafei Zhang, Nantao Hu, Zhi Yang, Yanjie Su
Summary: A novel method for improving the performance of SWCNT-based photodetectors through interfacial charge transfer induced by Au nanoparticle surface doping is reported. Experimental results show that AuNP doping can effectively enhance the generation and transport of photogenerated carriers, thereby significantly improving the performance of the photodetector. This study provides a simple route for enhancing the performance of SWCNT-based photodetectors and offers a new method for characterizing the interfacial charge transfer between dopants and SWCNTs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Peiyao Wang, Feng Shao, Bin Li, Yanjie Su, Zhi Yang, Nantao Hu, Yafei Zhang
Summary: In order to increase the specific capacitance of supercapacitors, polyaniline (PANI) has been used as an additive electrode material. In this study, a molecular-level uniform reduced graphene oxide/PANI (rGO/PANI) composite film was synthesized through self-assembly and specific thermal reduction, which showed great potential in flexible supercapacitors with high areal capacitance. The performance of the rGO/PANI film, such as specific areal capacitance and cycling stability, was significantly enhanced compared to the pure rGO electrode.
Article
Engineering, Environmental
Hewei Yuan, Yaozhong Zhang, Yanjie Su, Nantao Hu, Jianhua Yang, Min Zeng, Zhi Yang, Yafei Zhang
Summary: This study introduces a novel Type II heterojunction consisting of BiVO4 thin film and diamond-like carbon (DLC) to the PEC system, which significantly enhances the PEC water-splitting activity. Compared to the pure BiVO4, the BiVO4/DLC heterojunction exhibits increased photocurrent density and improved stability. The enhancement in PEC performance is attributed to the Type II heterojunction photoanodes that promote carrier mobility and reduce the recombination rate of electron-hole pairs. Furthermore, the sp2 carbon phase in DLC acts as a conductive channel, while the sp3 carbon phase provides stable support and passivation effect, leading to an enhancement in both PEC water splitting performance and long-time stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Suning Liang, Zhi Yang, Xianjun Shao, Yiming Zheng, Qiang Wang, Zhengyong Huang
Summary: This study used molecular dynamics and quantum mechanics theory to investigate the adsorption kinetics and mechanism of graphene-based materials on polar small molecules in vegetable oil. The results showed that these materials effectively adsorb the polar small molecules, and the modification with oxygen-containing groups improves their adsorption ability by converting physical adsorption to chemical adsorption. This study provides a theoretical basis for designing and preparing graphene materials with high adsorption properties.
Article
Chemistry, Multidisciplinary
Xiyu Chen, Min Zeng, Jianhua Yang, Nantao Hu, Xiaoyong Duan, Wei Cai, Yanjie Su, Zhi Yang
Summary: A 2D bimetallic phthalocyanine-based COF (COF-CuNiPc) was reported as a chemiresistive gas sensor with high gas-sensing performance for nitrogen dioxide (NO2). COF-CuNiPc with an asymmetric synergistic effect achieved a fast adsorption/desorption process to NO2. The bimetallic structure of COF-CuNiPc provided a proper band gap and the CuNiPc heterometallic active site accelerated the adsorption/desorption processes. The concept of a synergistic effect enabled by bimetallic phthalocyanines in this work can provide an innovative direction for designing high-performance chemiresistive gas sensors.
Article
Materials Science, Multidisciplinary
Yongwei Zhang, Jianhua Yang, Chunpeng Jiang, Chao Fan, Wen Lv, Xiyu Chen, Min Zeng, Nantao Hu, Tao Wang, Zhi Yang
Summary: A highly sensitive, flexible capacitive pressure sensor based on a fabric-mould strategy is introduced. Custom square-conical arrays with Au electrodes can feasibly be fabricated at scale by peeling them off the fabric mould. The pressure sensor exhibits high sensitivity, fast response/recovery time, and ultralow detection limit, showing great potential for various applications and accurately identifying human physiological information and the spatial distribution and shape of objects.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Huan Yin, Tian Tian, Ruxuan Zhang, Luoxi Zhang, Mingkui Zhu, Tianhao Zhang, Zhi Yang, Nantao Hu, Yafei Zhang, Yanjie Su
Summary: All-carbon nano-heterostructure photodetectors based on different carbon allotropes exhibit excellent photoelectric performance. However, the performance is limited by the interfacial charge transfer and large dark current of graphene. In this study, asymmetric all-carbon nano-heterostructures with C-60/graphene/single-walled carbon nanotube (SWCNT) heterojunctions were designed and demonstrated to have excellent photoelectric response in the visible to NIR range, high responsivity, ultrahigh detectivity, and fast response time. The interfacial charge transfer mechanism was also investigated. This work provides insights into interfacial charge transfer in carbon-based heterostructures and offers a strategy for designing and fabricating high-performance all-carbon nano-heterostructure photodetectors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Huan Yin, Ruxuan Zhang, Tian Tian, Zhi Yang, Nantao Hu, Yafei Zhang, Yanjie Su
Summary: The interfacial charge transfer between single-walled carbon nanotubes (SWCNTs) and graphene is systematically investigated under different external conditions, including bias voltage, temperature, and atmosphere. It is found that electrons are transferred from SWCNTs to graphene when the applied voltage deviates from the neutral point voltage of -4 V. The built-in electric field induces the transfer of electrons from SWCNTs to graphene under various atmospheric and temperature conditions. This study provides important insights into the interfacial charge transfer between SWCNTs and graphene and offers guidance for designing high-performance all-carbon vdW heterostructure nanodevices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Jaafar Abdul-Aziz Mehrez, Xiyu Chen, Min Zeng, Jianhua Yang, Nantao Hu, Tao Wang, Ruili Liu, Lin Xu, Yorexis Gonzalez-Alfaro, Zhi Yang
Summary: This study analyzes the structural and electronic parameters of a MoTe2/InN vdW heterostructure using density functional theory (DFT), finding that it has a higher adsorption energy and is well suited for NO2 detection. However, there are limitations in detecting NH3 and SO2.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Jaafar Abdul-Aziz Mehrez, Xiyu Chen, Min Zeng, Jianhua Yang, Nantao Hu, Tao Wang, Ruili Liu, Lin Xu, Yorexis Gonzalez-Alfaro, Zhi Yang
Summary: This study employs density functional theory to analyze the structural and electronic parameters of a MoTe2/InN vdW heterostructure. The findings indicate that the heterostructure has a strong adsorption capability for NH3, NO2, and SO2, making it well suited for NO2 detection. However, there are limitations in detecting NH3 and SO2 reliably.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Haoyuan Bai, Jingtian Hu, Shiu Hei Lam, Yanzhen Guo, Xiao-Ming Zhu, Zhi Yang, Jianfang Wang
Summary: The commonly white MoO3 is converted to a black, strongly light-absoring material through heavy V-doping, enabling efficient solar seawater desalination. The V-doped MoO3 nanospheres in the solar absorber film exhibit high evaporation rate and solar energy conversion efficiency.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Physical
Min Hong, Bingcheng Luo, Chao Zhou, Shusheng Xu, Liying Zhang, Zili Zhang, Zhi Yang, Nantao Hu, Yafei Zhang, Zheng Liang
Summary: In this study, a hierarchical design of a film electrode based on NiCoP nanoparticles-decorated carbon nanosheet arrays assembled on nickel nanowires was successfully demonstrated to optimize the conductivity and stability of the electrode. The as-fabricated electrode exhibited high volumetric capacity, energy density, and excellent cycling performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Tao Wang, Hongli Ma, Wenkai Jiang, Hexin Zhang, Min Zeng, Jianhua Yang, Xue Wang, Ke Liu, Renhua Huang, Zhi Yang
Summary: A microwave-assisted method was used to synthesize zinc oxide with controllable hierarchical structures, which showed unique response towards six kinds of gases. Pattern recognition analysis based on machine learning, such as SVM and ELM, improved the detection performance of the gas sensor array with different response characteristics regulated by the morphology. SVM achieved an accuracy of over 0.99 in distinguishing the six gases, while ELM-based regressor showed a prominent performance in predicting ethanol concentration.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
