Article
Chemistry, Physical
Junlei Wang, Xueqin Wang, Qihui Chen, Helong Xu, Man Dai, Mei Zhang, Wenyi Wang, Hua Song
Summary: The microstructure of photocatalysts, such as hollow TiO2 spheres synthesized using RF polymer resin, plays a vital role in enhancing photocatalytic performance. Adjusting the concentration of ammonia during synthesis affects the micromorphology and photocatalytic properties of the TiO2 spheres. The high conductivity and surface area of the hollow TiO2 spheres contribute to their efficient photocatalytic performance in phenol decomposition.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Mengyuan Teng, Haixia Liu, Bensheng Lin, Xiangzhu Zhou, Wei Zhou
Summary: Titanium dioxide is widely used for solving energy and environmental pollution problems due to its excellent properties. In this study, anatase TiO2 with a unique hexagonal framework structure was successfully prepared and demonstrated excellent photocatalytic performance.
Article
Chemistry, Inorganic & Nuclear
Liu Feng-Qiang, Wang Li-Ming, Fan Ding, Xu Li-Hui, Pan Hong
Summary: TiO2/Cu2O/Pt composite hollow microspheres were prepared using precipitation and liquid deposition methods. The introduction of Pt and Cu2O in the composites effectively enhanced the light absorption in the visible region and improved the photocatalytic stability. The TiO2/Cu2O/Pt photocatalyst showed significantly enhanced ability to degrade organic pollutants, achieving 93% degradation of methyl orange (MO) solution in 120 minutes of light exposure.
CHINESE JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Jiayuan Chang, Qiwen Bao, Cong Zhang, Xinhao Zhao, Zongsheng Cao, Yuan Wang, Ruirui Li, Ruyue Guo, Huayi Li, Jie He, Peng Pan, Zhengchun Yang, Jun Wei
Summary: Octahedral Cu2O@Cu powders were prepared using a two-step liquid phase reduction method with glucose and thiourea dioxide as pre-reductant and secondary-reductant, enhancing their photocatalytic properties. Varying the content of thiourea dioxide led to the formation of different structures, with photocatalytic performance significantly improved in the presence of CuNPs under visible light irradiation.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Jui-Cheng Kao, Jyh-Pin Chou, Peng-Jen Chen, Yu-Chieh Lo
Summary: The stability of Cu2O surfaces can be effectively improved by H, OH, and halogen atoms. The coverage conditions have a significant impact on the electronic properties of the (110) surface, with the half-coverage OH-terminated surface showing a suitable band structure for enhancing the separation of electron/hole pairs and improving the photocatalytic efficiency.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Fengqiang Liu, Liming Wang, Lihui Xu, Hong Pan, Ding Fan
Summary: Hollow spherical nanoTiO2/Cu2O composites were prepared using hydrothermal and precipitation methods, and their properties were characterized and evaluated. The results showed that TiO2 loading improved the adsorption and photocatalytic performance of Cu2O, indicating its potential for photocatalytic treatment of waste liquids.
Article
Chemistry, Physical
Minmin Han, Biao Guo, Zhengyang Zhang, Xun Hu, Zhonghao Wang
Summary: We prepared Bi4Ti3O12/TiO2 hollow nanocakes via a metal-organic framework (MOF)-derived calcination strategy. The photocatalytic hydrogen generation performance of the nanocakes was enhanced compared to TiO2 hollow nanocakes. The improvement in photocatalytic properties was attributed to the increased specific surface area, as well as the type II heterojunction between Bi4Ti3O12 and TiO2, which enhanced light-harvesting efficiency and suppressed charge carrier recombination.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jiawei Zhang, Dan Wang, Shaoqian Shi, Weiyi Hao, Chen Yuan, Zilin Lu, Fei Teng
Summary: A simple in situ water-bath method is used to load Cu2O hollow nanospheres on TiO2 nanosheets. The H-Cu2O/TiO2-2 sample shows stronger visible light absorption, higher charge separation efficiency, and improved photocatalytic activity compared to TiO2-NS. The findings suggest the potential of the in situ water-bath method for the development of other composite materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Lufang Fan, Jiahui Han, Kai Wei, Changchang Ma, Sheng Feng, Yun Zhou, Xiaojun Dai, Zhiwei Ye, Yang Wang
Summary: This study aimed to enhance the reduction ability of CdS by substituting it with Mn2+ and forming an S-scheme heterojunction with Cu2O. By equilibrating the Fermi level, the MnCdS/Cu2O heterojunction facilitated the recombination of electrons and holes, resulting in robust photocatalytic hydrogen evolution. The MnCdS/Cu2O exhibited a significantly higher photocatalytic hydrogen evolution rate than pure MnCdS and Cu2O.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
David Kovacs, Andras Deak, Gyorgy Z. Radnoczi, Zsolt E. Horvath, Attila Sulyok, Robert Schiller, Otto Czompoly, Daniel Zambo
Summary: This paper investigates the efficient utilization of UV light-excited charge carriers in cuprous oxide by preparing different heterostructures with gold. The effect of morphology and the semiconductor-metal contact on optical and photocatalytic properties is studied in detail using various techniques. Gold-decorated Cu2O nanooctahedra exhibit superior particle stability and photocatalytic activity. The study highlights the importance of nanoscale design in utilizing photoexcited carriers in the semiconductor without injecting hot electrons from the metal.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Riza Ariyani Nur Khasanah, Hui-Ching Lin, Hsiang-Yun Ho, Yen-Ping Peng, Tsong-Shin Lim, Hsi-Lien Hsiao, Chang-Ren Wang, Min-Chieh Chuang, Forest Shih-Sen Chien
Summary: Cu2O is a promising material for photocatalysis due to its absorption ability in the UV-visible light range, functioning as a photocathode when deposited on conductive Ti and FTO substrates, and as a photoanode when deposited on n-type semiconductors like TiO2 nanotube arrays. The photocatalytic properties of Cu2O heterojunctions on different substrates were systematically studied, showing that Cu2O/TNA/Ti exhibited higher photocurrent spectral responses compared to Cu2O/Ti and Cu2O/FTO photocathodes. The enhancement of photocatalytic activity in Cu2O/TNA/Ti was attributed to its UV-visible light absorption capabilities.
Article
Energy & Fuels
Zhiliang Jin, Yue Cao
Summary: The construction of a reasonable interface structure can directionally regulate carrier transference for photocatalyst and improve photocatalytic performance. The formation of p-n heterojunction was accelerated by the opposite surface electronegativity of CoAl-LDH and Cu2O, providing a viable thermodynamic path for the transference of electrons. The strong internal electric field in p-n heterojunction greatly improved the charges separation and diversion, enhancing the number of electrons participating in reduction reactions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Zhengliang Yin, Yingguan Xiao, Xiong Wan, Ying Jiang, Gang Chen, Qingye Shi, Shunsheng Cao
Summary: A SiO2-Cu2O@SiO2 photocatalyst was constructed for efficient hydrogenation of nitroarenes in an aqueous system, successfully overcoming the strict hydrogenation conditions requirement.
The confinement effect promotes the contact probability between hydrogen atoms and nitroarene molecules, ensuring high efficiency and selectivity of the reaction.
This study demonstrates the promising industrial applications of visible-light catalytic hydrogenation of nitroarenes.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Yanbing Li, Zhiliang Jin, Noritatsu Tsubaki
Summary: To promote photocatalytic reactions and sustain structural stabilities, nanostructured photocatalysts in hollow and/or framelike forms have attracted great attention. In this study, two fresh hollow-structured nanomaterials with tunable compositions and uniform metal active sites were designed and synthesized. These materials showed improved visible-light-driven H2 evolution reactions.
ACS APPLIED NANO MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Yanze Wei, Decai Zhao, Jiawei Wan, Dan Wang
Summary: This review investigates the influence of interactions among electron-orbital-lattice on the physicochemical properties of hollow multishelled structures (HoMSs) and uncovers performance enhancements from an atomic perspective.
TRENDS IN CHEMISTRY
(2022)
Article
Chemistry, Analytical
Shuaijun Hao, Hong Wang, Ruisong Yang, Di Liu, Jiawei Wan, Xiaohua Liu, Qiang Zhang, Xinkuan Chen
Summary: Dandelion-like SiO2@SnO2/alpha-Fe2O3 hollow microspheres were successfully synthesized with mesoporous structure and catalytic effect, showing excellent sensitivity to acetone gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Ruling Huang, Jiao Lin, Jiahui Zhou, Ersha Fan, Xixue Zhang, Renjie Chen, Feng Wu, Li Li
Summary: Hierarchical MnCo2O4 hollow microspheres with three porous shells have been fabricated as anode materials for potassium-ion batteries, showing enhanced rate performance and demonstrated substance transformation during charging/discharging processes using in situ X-ray diffraction strategy.
Article
Energy & Fuels
Jie Qu, Ke Zhang, Hany Gamal, Jianan Wang, Amr M. Abdelkader
Summary: In this study, new p-DSSC electrodes were fabricated using NiO hollow spheres prepared through a one-step hydrothermal process. The research showed that p-DSSCs fabricated using triple-shell NiO HS exhibited excellent photoelectrochemical performance with a photoelectrical efficiency of 1.79%. The unique structure of the triple-shell NiO HS provided superior light reflection, scattering ability, and a large surface area with more inner cavities, leading to increased light harvesting.
Article
Chemistry, Multidisciplinary
Ming Qin, Limin Zhang, Xiaoru Zhao, Hongjing Wu
Summary: This study demonstrates the defect induced dielectric loss dominant mechanism in multi-shelled spinel hollow spheres, showing that defects in spinel structure play a more profound role in electromagnetic wave dissipation than oxygen vacancies. The research also suggests that electron spin resonance test can be used as a novel approach to probe materials' electromagnetic wave absorption capacities.
Article
Engineering, Environmental
Yan Zhou, Zixin Jia, Siyuan Zhao, Peng Chen, Youning Wang, Tong Guo, Liyuan Wei, Xiangmei Cui, Xiaoping Ouyang, Xin Wang, Junwu Zhu, Jingwen Sun, Shugang Pan, Yongsheng Fu
Summary: Designing novel electrode materials with controlled structure and composition is challenging, but a triple-shelled hollow nanostructure has been successfully designed here, showing improved electrochemical activity, fast electronic/ion transport, mechanical stability, and enhanced charge storage. This electrode material delivers high specific capacity and outstanding cyclic stability, leading to a long cycle life and high energy density in all-solid-state hybrid supercapacitors.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Muhammad Waqas
Summary: A delicate synthesis strategy of Fe2TiO5/Fe2O3 heterostructures was proposed to achieve efficient photocatalytic water oxidation, with the hierarchical structure increasing light absorption depth and promoting the separation of photoinduced excitons, while the high surface area and adequate porosity facilitated the diffusion of electrolyte and adsorption at active sites. Furthermore, the coating of Fe2TiO5/Fe2O3 with graphitic carbon nitride subunits improved photocatalytic water reduction by accelerating the separation of electrons and holes at the contact interface.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Guangzhi Yang, Zhenkun Zhang, Zhenwang Zhang, Li Zhang, Yuhua Xue, Junhe Yang, Chengxin Peng
Summary: The selection of proper electrode materials and the design of rational structure are two efficient approaches to improve the electrochemical performance of supercapacitors. This work successfully achieved a hollow double-shell H-SnO2/MesCHS heterostructure with excellent electrochemical performance, demonstrating high specific capacitance, exceptional cycling stability, and outstanding coulombic efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Xiaoyan Li, Yu Xiang, Ransha Deng, Xijun Wei, Xiaoqin Liu, Qiaoji Zheng, Dunmin Lin, Yingze Song
Summary: This study presents a unique strategy for the rational design of transition metal sulfides (TMSs) with high-performance for sodium-ion batteries (SIBs) by utilizing Cu/Zn co-doped ZIF-67 as a precursor to prepare multi-shell hollow carbon-coated Cu39S28-CoS2-ZnS@nitrogen doped carbon cubes. The resulting electrode shows remarkable electrochemical stability and rate capability, attributed to the effective buffering of volumetric stress, increased volume utilization rate, improved conductivity, and prevention of active particle agglomeration provided by the unique multi-shell structure.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Optics
Wen-Ling Li, Jing-Wei Liu, Guo-An Cheng, Qing-Zhong Huang, Rui-Ting Zheng, Xiao-Ling Wu
Summary: In this study, a diffraction grating based on a multilayer silicon nitride waveguide is proposed, which demonstrates high upward diffraction efficiency and large effective length. The analysis shows that the diffraction grating has a high tolerance to process variations and can adjust the near-field effective length. The research results suggest that this diffraction grating has potential applications in optical sensing and imaging.
Article
Materials Science, Multidisciplinary
Yongqiang Ren, Xiuyan Li, Yinan Wang, Qinghua Gong, Shaonan Gu, Tingting Gao, Xuefeng Sun, Guowei Zhou
Summary: Hollow ternary metal oxides, such as Mo-doped NiCo2O4 porous spheres with yolk-shell structure, show promising potential in LIBs due to their intricate composition and ample active defect sites. The porous core with unique pores of about 85 nm in diameter contributes to enhanced electrolyte infiltration and efficient transmission of Li+ and e(-), resulting in outstanding electrochemical performance with high reversible capacity, satisfactory cycle life, and exceptional rate capability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Renying Li, Zhong Lin, Kelin Zhu, Lin Liu, Jinxiao Li, Xiaoling Wu, Ruiting Zheng, Guoan Cheng
Summary: In this study, a large-area single-phase VO2 film was prepared and the coexistence of two phases during the phase transition process was observed. The gradual monoclinic-to-rutile phase transition was confirmed by in situ Raman-scattering mapping scans. This research provides important insights into the mechanism of metal-insulator phase transitions.
Article
Engineering, Electrical & Electronic
Wen-ling Li, Jing-wei Liu, Guo-an Cheng, Rui-ting Zheng, Xiao-ling Wu
Summary: This work proposes and analyzes silicon nitride waveguide superlattices with air gaps, which help to improve the beam steering performance of optical phased arrays (OPAs) in the near-infrared waveband. By introducing air gaps beside the waveguide, the skin depth of the evanescent field is shortened and the effective index range of the waveguide is increased under single mode conditions, resulting in lower crosstalk compared to waveguides without air gaps. A waveguide superlattice with air gaps is designed using the eigenmode expansion method and particle swarm optimization, achieving optimized crosstalk of -24.3 dB at a waveguide pitch of 0.9 μm, propagation length of 1 mm, and wavelength of 905 nm.
IEEE PHOTONICS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jianguang Wang, Kelin Zhu, Xiaoling Wu, Guoan Cheng, Ruiting Zheng
Summary: This study systematically investigated the fabrication of 1 to 5 nm porous silicon using helium ion implantation and revealed the growth and regulation mechanism of helium bubbles in monocrystalline silicon at low temperatures. The growth of helium bubbles can be divided into three distinct stages, each with different formation mechanisms. The minimum average diameter of a helium bubble is approximately 2.3 nm, with a maximum number density of 4.2 x 10^23 m^-3. The porous structure cannot be obtained at injection temperatures below 115℃ or injection doses below 2.5 x 10^16 ions/cm^2. Both the ion implantation temperature and dose have an impact on the growth of helium bubbles in monocrystalline silicon. This research provides an effective approach for fabricating 1 to 5 nm nanoporous silicon, challenging traditional views and proposing new theories.
Article
Chemistry, Physical
Jinhua Yang, Xianfeng Yang, Jian Liang Cheong, Karim Zaghib, Michel L. Trudeau, Jackie Y. Ying
Summary: Nanoboxes with a porous MnO core and amorphous TiO2 shell were synthesized for the first time via a wet-chemistry method. These core-shell nanostructures showed excellent performance as high-capacity cathode materials for lithium-sulfur batteries, providing a good model for investigating the morphological and structural effects of nanocomposites on the capacity and stability of Li-S batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Electrochemistry
Anweshi Dewan, Sattwick Haldar, Remya Narayanan
Summary: A multi-shelled NiO hollow sphere was successfully synthesized, demonstrating enhanced active surface area and additional reactive sites for electrochromic devices and sensing applications. The geometry of the electrolyte ensures intimate contact between active sites and enhances ionic diffusion. Additionally, the material displayed excellent non-enzymatic glucose sensing performance.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2021)
