Article
Chemistry, Analytical
Shichao Wang, Xiaohu Wang, Gaoqun Qiao, Xiaoyan Chen, Xinzhen Wang, Hongzhi Cui
Summary: Core-double shell-structured ZnO@In2O3@ZnO microspheres were successfully synthesized by decorating In2O3 and ZnO on the surface of ZnO hollow microspheres, exhibiting excellent gas sensing properties with high response to gases like ethanol, especially at low concentrations. This superior gas sensing performance was attributed to its high specific surface area, abundant surface defects, and radial electronic modulation mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Qian Zhu, Yan Wang, Fu Chen, Xiaohong Yang, Hui Ou, Shixian Xiong, Haitao Fu
Summary: In this study, novel Au@Cu2O-Ta3N5 discrete core-shell ternary nanospheres were prepared for highly efficient photocatalytic H-2 production. The core-shell structure irradiated for 2 h showed a higher photocatalytic H-2 production rate compared to other samples. The enhanced performance is attributed to the unique discrete core-shell structure, designed appropriate band structure, low charge transfer resistance, and high electron-hole separation ability. This study provides a novel Ta3N5-based ternary core-shell structure for high-performance H-2 production.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Astrini Pradyasti, Dae Seok Kim, Mun Ho Kim
Summary: This study successfully synthesized Au@AgAuS core-shell hybrid nanorods using a water-based synthesis strategy, and investigated their morphological evolution and compositional conversion. The unique composition and plasmonic characteristics of the Au@AgAuS hybrid nanorods contribute to their excellent photocatalytic activity under sunlight irradiation.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Taro Ueda, Inci Boehme, Takeo Hyodo, Yasuhiro Shimizu, Udo Weimar, Nicolae Barsan
Summary: The study found that the resistance of the sensor loaded with gold in dry air was lower than that of the sensor without gold. Additionally, the characteristic spectral band of oxygen adsorbates increased significantly, leading to an improvement in the adsorption of NO2.
Article
Chemistry, Analytical
Haitao Fu, Xiaohong Yang, Zhenxiang Wu, Peng He, Shixian Xiong, Dezhi Han, Xizhong An
Summary: The study synthesized In2O3@MoO3 core-shell hollow spheres through a facile method, revealing that the core-shell structure with an In to Mo molar ratio of 1:1 showed the highest sensing response at the same working temperature. This response was significantly higher compared to pristine In2O3 hollow spheres and binary mixtures.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Jinyu Huang, Zichao Ma, Junda Li, Zhonglei Zhang, Jihua Tang, Xiangdong Cao, Wei Xu, Xiaojin Zhao, Yatao Yang, Xiaofang Pan, Yu Du
Summary: Detecting the trace levels of formaldehyde in indoor ambient and human breath is important and a hybrid nanostructure consisting of In2O3 nanoparticles on a Au nanocage (NC) surface was synthesized as HCHO sensors. The Au NC/In2O3 sensor showed an ultrahigh response towards HCHO with outstanding selectivity and a low detection limit. This excellent sensing property was attributed to factors such as chemisorbed oxygens on its surface, phase transition of In2O3, good gas diffusion, a large surface area, and the widened electron depletion layer derived from the Schottky barriers and homojunctions.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Q. A. Drmosh, Yousif Ahmed Al Wajih, Ibrahim Olanrewaju Alade, A. K. Mohamedkhair, Mohammad Qamar, Abbas Saeed Hakeem, Z. H. Yamani
Summary: A new approach to improve the performance of acetone gas sensors by engineering the depletion layer using Au decorated ZnO/Ag core-shell films has been developed. The findings demonstrate that controlled engineering of the depletion layer is an effective method for designing high-performance metal oxide-based gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Yuehao Fu, Hong Wang, Xiaohua Liu, Di Liu, Jiawei Wan, Shuaijun Hao, Qiang Zhang, Xingkuan Chen, Zhipeng Zen, Hong Xin
Summary: In this study, urchin-like core-shell In2O3/ZnO nanocomposites with mesoporous structure and high specific surface area were prepared via a facile solvothermal method. The sensor based on these nanocomposites showed excellent gas-sensing performance to triethylamine (TEA), attributed to the special urchin-like structure with mesoporous and high specific surface area, plentiful oxygen vacancies, and the formation of n-n heterojunction.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Gauravjyoti D. Kalita, Podma P. Sarmah, Golap Kalita, Pankaj Das
Summary: A facile ligand-assisted approach was used to synthesize bimetallic Au-Pd nanoparticles with a tunable core@shell structure. The Au-Pd materials exhibited superior performance in two important reactions, with the Pd-core-Au-shell structure showing higher activity compared to the Au-core-Pd-shell structure.
NANOSCALE ADVANCES
(2021)
Article
Nanoscience & Nanotechnology
Cynthia Cibaka-Ndaya, Nicolas Javahiraly, Lucian Roiban, Thierry Epicier, Nacer Boubiche, Sabastien Valette, Antoine Saury, Arnaud Brioude
Summary: A multistep synthesis method was used to prepare nanoscale core@shell spherical heterostructures for H2 optical detection. These nanoheterostructures consist of gold cores, silica shells, and a thin layer of spherical palladium nanoparticles. The samples were characterized by transmission electron microscopy, and the three-dimensional core@shell configuration was confirmed by electron tomography. The optical properties of the nanostructures were analyzed, and their potential for H2 detection was evaluated.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Dong Jae Yu, Wansik Oum, Ali Mirzaei, Ka Yoon Shin, Eun Bi Kim, Hyeong Min Kim, Sang Sub Kim, Hyoun Woo Kim
Summary: We synthesized pristine SnO2 nanoparticles and Au@SnO2 core-shell nanocomposites for xylene gas sensing. The Au@SnO2 core-shell nanocomposites showed better response and selectivity compared to the pristine SnO2 nanoparticles, demonstrating the promising effects of the Au@SnO2 core-shell structure for xylene sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Qing-Ling Hong, Bin Sun, Xuan Ai, Xin-Long Tian, Fu-Min Li, Yu Chen
Summary: Au nanocrystals modified holey PtTeAu metallene heteronanostructures achieve efficient ammonia production through nitrogen reduction, and further enhance the ammonia yield under visible light irradiation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yao Yao, Gangli Liao, Huina Cui, Wenbin Dong, Zhen Zhao
Summary: A novel monodispersed In2O3@ZIF-8 core-shell nanocomposites have been successfully synthesized via a simple sonochemical method. The encapsulation of In2O3 nanoparticles into ZIF-8 shell significantly extends the light response into the visible light region. The In2O3@ZIF-8-175 CSNC exhibits selectivity and ultra-high photocatalytic activity for organic dye acid fuchsin removal, benefiting from the large surface area, porous nanostructure, and synergistic effect between In2O3 and ZIF-8. This work not only provides a general synthesis route for unique core-shell heterostructures but also opens up a new pathway for high-performance photocatalysts in selective removal of other hazardous ions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Analytical
Peng He, Haitao Fu, Xiaohong Yang, Shixian Xiong, Xizhong An
Summary: In this study, room-temperature sensing materials made of Pt nanoparticles modified In2O3@ZnS core-shell hollow nanospheres were synthesized. The effects of morphology and composition on gas sensing performance were systematically investigated. These materials exhibited excellent sensing performance towards n-butanol at room temperature and showed a fast response to different concentrations.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Huiqin An, Zhaotao Lv, Kun Zhang, Congying Deng, Hong Wang, Zongwei Xu, Meiri Wang, Zhen Yin
Summary: The study successfully enhanced the hydrogen production efficiency during the water splitting process by constructing the Au@Pt/ZIS photocatalyst, with experimental results showing its remarkable hydrogen production capability compared to ZIS.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Rama Krishna Chava, Ha-Young Cho, Jeong-Mo Yoon, Yeon-Tae Yu
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Multidisciplinary
Junyeong Kim, Jun Neoung Heo, Jeong Yeon Do, Rama Krishna Chava, Misook Kang
Article
Chemistry, Multidisciplinary
Rama Krishna Chava, Namgyu Son, Yang Soo Kim, Misook Kang
Article
Chemistry, Multidisciplinary
Byung Hyun Park, Junhee Lee, Hyerim Park, Jeong Yeon Do, Youngsoo Kim, Rama Krishna Chava, Misook Kang
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Jeong Yeon Do, Namgyu Son, Rama Krishna Chava, Kotesh Kumar Mandari, Sadanand Pandey, Vignesh Kumaravel, T. S. Senthil, Sang Woo Joo, Misook Kang
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Jeong Yeon Do, Namgyu Son, Jongmin Shin, Rama Krishna Chava, Sang Woo Joo, Misook Kang
Summary: By utilizing an encapsulation method, a new PCM with high thermal conductivity and storage capacity was developed, demonstrating excellent heat transfer ability and efficient energy storage-release performance compared to conventional materials, making it suitable for various industrial applications.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Rama Krishna Chava, Namgyu Son, Misook Kang
Summary: The study successfully designed a CeO2 and CdS heterostructured photocatalyst system to achieve efficient photocatalytic H2 evolution reaction and demonstrated good stability. This superior performance is attributed to efficient separation of photoexcited charge carriers, suppressed recombination rate, and strong hybridization between CdS and CeO2 components.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Rama Krishna Chava, Namgyu Son, Misook Kang
Summary: The study synthesized one-dimensional CdS nanorods via a solvothermal method and developed a low-temperature heating strategy to incorporate O-doping and S-vacancies into CdS for efficient visible photocatalytic hydrogen evolution reaction. The heat-treated samples showed enhanced visible light absorption and improved separation of photogenerated charge carriers, leading to a significantly higher photocatalytic activity. This work demonstrates a simple thermal treatment method to produce S-vacancies and O-doping for the fabrication of efficient photocatalysts for solar hydrogen production.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Rama Krishna Chava, Namgyu Son, Misook Kang
Summary: A method of proficient and scalable single-step growth of Bi/Bi2MoO6-MoS2 ternary heterojunctions on CdS nanorods using ethylene glycol mediated solvothermal growth was reported for the first time, showing excellent H-2-evolution activity. The obtained CdS-Bi/Bi2MoO6-MoS2 quaternary heteronanostructures can efficiently separate charge carriers, enhance visible light harvesting, and suppress electron-hole recombination.
APPLIED SURFACE SCIENCE
(2021)
Article
Environmental Sciences
Rama Krishna Chava, Namgyu Son, Misook Kang
Summary: Earth abundant metal based plasmonic photocatalysis is an effective method for treating contaminated water with emerging organic pollutants. By combining Bi quantum dots with CdS nanorods, the photocatalytic performance of CdS is improved and shows promising degradation efficiency in the presence of antibiotics like tetracycline. CdS/Bi is a potential photocatalyst for treating wastewater containing emerging pollutants such as organic dyes and antibiotics.
Article
Chemistry, Physical
Rama Krishna Chava, Namgyu Son, Misook Kang
Summary: A study successfully designed indium hydroxide-loaded metal sulfide heterostructures as excellent photocatalytic systems for hydrogen evolution and organic pollutant degradation reactions. The rational design led to improved charge separation and outstanding photocatalytic activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Rama Krishna Chava, Taeseong Kim, Youngsoo Kim, Misook Kang
Summary: We reported a heterostructured photocatalytic system composed of highly dispersed oxygen-doped VS4 nanoparticles on a one-dimensional network of cadmium sulfide nanorods. The VS4 nanoparticles created Schottky heterojunctions for efficient charge transfer and provided abundant catalytic active sites. The optimized CdS/VS4 photocatalytic system showed superior performance compared to Pt and MoS2 cocatalysts in the CdS-Pt and CdS-MoS2 photocatalytic systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Rama Krishna Chava, Misook Kang
Summary: This study highlights the use of bromine-ion-doped layered Aurivillius oxide, Bi2WO6, to optimize the morphology and increase the formation of active sites on the photocatalyst's surface. The presence of bromine ions restricts multilayer stacking and increases the specific surface area of the synthesized Bi2WO6 nanoplates, resulting in enhanced photocatalytic tetracycline degradation activity. This research shows the potential of utilizing bromine ions as mediators in synthesis to design layered photocatalysts for improved water remediation.
Article
Chemistry, Multidisciplinary
Rama Krishna Chava, Misook Kang
Summary: Polymerizing melamine with malonic acid is demonstrated to be an efficient strategy for tuning the electronic bandstructure of low-cost organic graphitic carbon nitride (g-C3N4) photocatalysts, resulting in extended photoresponse range and improved photocatalytic performance.
Article
Chemistry, Inorganic & Nuclear
Rama Krishna Chava, Namgyu Son, Yang Soo Kim, Misook Kang
INORGANIC CHEMISTRY FRONTIERS
(2020)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.
