Article
Materials Science, Multidisciplinary
Phuong Dao, Kang Du, Guohua Liu, Gang Li, Muhammad Tayyib, Kaiying Wang
Summary: This study presents the synthesis and photocatalytic properties of Silicon-doped TiO2 nanotubes (TNTs) using the hydrothermal method. The doping level of Silicon was varied within the range of 1-30%, leading to enhanced crystallinity and purity of the anatase phase. The doping also resulted in a redshifted absorption spectra and improved photocatalytic activity.
Article
Nanoscience & Nanotechnology
Hirokuni Jintoku, Yoko Matsuzawa
Summary: This study successfully developed a method to fabricate highly aligned SWCNT films and achieved micrometer-scale patterning using photoresponsive treatment of the dispersion. This paves the way for the development of SWCNT-aligned devices for electronic and optical applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Ceramics
Haidee Mana-ay, Cheng-Sao Chen, Xin-Hao Wang, Chi-Shun Tu, Pin-Yi Chen
Summary: This study reports the ferroelectric polarization-enhanced photoresponse of near UV and UVA light in ferroelectric photovoltaic materials. The (Bi0.93Gd0.07)FeO3 heterostructure showed superior photoresponse compared to (Bi0.93Sm0.07)FeO3 due to its more complex domain structure, smaller bandgap, and stronger orbital hybridization. These results demonstrate the potential use of ferroelectric polarization and domain structure for highly sensitive and self-biased visible-UVA photodetectors.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Shuren Zhou, Haodong Fan, Shaofeng Wen, Rui Zhang, Yi Yin, Changyong Lan, Chun Li, Yong Liu
Summary: Photodetectors based on pyramidal black-Si/graphene heterojunctions exhibit high responsivity and broadband characteristics, with a potential for significant gain compared to other structures.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Hanna Sopha, Zdenek Spotz, Marcela Sepulveda, Mahnaz Alijani, Martin Motola, Ludek Hromadko, Jan M. Macak
Summary: In this study, the crystallization process of TiO2 nanotube (TNT) layers was investigated through in-situ annealing in an XRD chamber. TNT layers of different thicknesses (1, 5, and 20 μm) and morphologies (double wall vs single wall) were annealed with two different annealing rates in the temperature range of room temperature to 500 degrees C. Three different annealing atmospheres (air, N2, and 5%H2/95%N2) were also explored. XRD patterns were measured at every 15 degrees C of the heating ramp, and the crystallite sizes of the anatase phase were calculated using the Scherer equation. The differences in crystallization behavior for different TNT layers and the influence of the annealing atmosphere on 5 μm thick TNT layers are described and discussed.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Xin Hao Wang, Shu-Yu Chen, Cheng-Sao Chen, Pin-Yi Chen, Chi-Shun Tu
Summary: This study presents highly-sensitive, millisecond-response, and self-powered photosensors based on the ITO/Bi0.93R0.07FeO3/Au heterostructures. The photodetection performance is significantly enhanced by electric field poling, showing improved photocurrent density, photoconductive gain, photoresponsivity, and specific detectivity. The fast response times are achieved in the range of milliseconds.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Nanoscience & Nanotechnology
Zilong Chen, Zhaowei Zhu, Liting Huang, Chuantong Cheng
Summary: Photodetectors are crucial components in optical sensing systems and the detection of ultraviolet (UV) signals is increasingly important in various industries. A low-cost and high-sensitivity UV photodetector based on a hybrid material of graphene and P25 quantum dots was developed for the first time, showing great potential for commercialization.
Article
Chemistry, Physical
Martin Motola, Raul Zazpe, Ludek Hromadko, Jan Prikryl, Veronika Cicmancova, Jhonatan Rodriguez-Pereira, Hanna Sopha, Jan M. Macak
Summary: A reconstruction process of TiO2 nanotube (TNT) layers was conducted to enhance their photoelectrochemical performance and photocatalytic activity. By preparing double-wall (DW) TNT layers, etching the inner wall to obtain single-wall (SW) TNT layers, and coating with TiO2 coatings of different thicknesses, significant improvements were achieved in incident photon-to-electron conversion efficiency and photocatalytic performance compared to untreated TNT layers.
APPLIED SURFACE SCIENCE
(2021)
Article
Acoustics
P. Belardinelli, S. Lenci, F. Alijani
Summary: Through molecular dynamics simulations, this study explores the possibility of internal resonances in single-walled carbon nanotubes. The resonant condition is controlled by manipulating the symmetry in the boundary condition and increasing the energy exchange with a coupled thermal bath. The critical temperature threshold for initiating modal interaction is found to be dependent on the nanotube's chirality. By applying the proper orthogonal decomposition algorithm, the study demonstrates how thermal fluctuations influence the vibrational behavior of the nanotube, leading to both flexural-flexural and flexural-longitudinal resonances.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Materials Science, Multidisciplinary
Nanda Kumar Reddy Nallabala, Lokendra P. Singh, C. Yuvaraj, Sangaraju Sambasivam, Suresh Kumar, Muthukonda Venkatakrishnan Shankar, Salh Alhammadi, Sunil Singh Kushvaha, Venkata Krishnaiah Kummara, K. Rahim Bakash, Vasudeva Reddy Minnam Reddy
Summary: Recently, the heterojunctions formed between different semiconducting materials have attracted considerable attention in the field of photodetectors. In this study, titania nanorods with anatase crystalline structures were synthesized and used to create wideband heterojunction photodetectors. The structures and optical parameters of the heterojunction were examined using various methods. The performance of the photodetectors was evaluated and compared, with the vertical structure exhibiting better results. This work presents a simple approach for developing tunable inorganic heterojunction-based wideband photodetectors.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Crystallography
Cristina Dumitriu, Alexandra Constantinescu, Cristian Pirvu
Summary: This paper introduces a gliadin detection method based on a titanium nanostructured electrode modified with graphene oxide. The impedance measured at a specific frequency and coating resistance were used for gliadin analysis. The system shows potential for gluten contamination detection in foods.
Article
Engineering, Electrical & Electronic
Ruchi Singh, Ritesh Bhardwaj, Gaurav Siddharth, Pawan Kumar, Shaibal Mukherjee
Summary: The study demonstrates that in ZnO-based homojunction p-i-n UV photodetectors, increasing the thickness of the top p-type layer leads to a decrease in peak responsivity, while increasing the thickness of the i-ZnO layer results in an increase in responsivity. Additionally, replacing the p-type layer material can significantly improve responsivity and dark current performance.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Yifan Zhang, Kecheng Cao, Takeshi Saito, Hiromichi Kataura, Hans Kuzmany, Thomas Pichler, Ute Kaiser, Guowei Yang, Lei Shi
Summary: This study investigated the diameter-dependent synthesis of GNRs using SWCNTs of different average diameters, and found that the width of GNRs can be tailored by the diameter of SWCNTs. Particularly, SWCNTs with an average diameter of 1.3 nm produced the highest yield of 6 and 7 armchair GNRs, indicating potential for high-yield production of certain GNRs in large scale applications.
Article
Chemistry, Physical
Kaihang Zhang, Yuanzheng Zhang, Su Liu, Xin Tong, Junfeng Niu, Dong Wang, Junchen Yan, Zhaoyang Xiong, John Crittenden
Summary: In this study, a MnOx-TiO2 NTAs anode was prepared by compositing narrow bandgap manganese oxide (MnOx) with TiO2 nanotube arrays (TiO2 NTAs). Electrochemical characterizations revealed that increasing the composited concentration of MnOx improved the conductivity and reduced the oxygen evolution potential, thus enhancing the electrochemical activity of the MnOx-TiO2 NTAs anode. Moreover, the optimal degradation rate of benzoic acid (BA) was achieved by adjusting the MnOx concentration and degradation voltage. These quantitative results are of great significance for the design and application of high-performance materials for electrochemical advanced oxidation processes (EAOPs).
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Environmental Sciences
Yen -Ping Peng, En-Xian Zhang, Chia -Hung Chen, Wu -Xing Chen
Summary: In this study, iron was deposited onto titanium dioxide nanotube arrays (TNAs) using the impregnation method to enhance its photocatalytic ability. The results showed that the iron modification successfully attached iron nanoparticles evenly to the TNAs, resulting in improved degradation of trichloroethylene (TCE) in a photoelectrochemical (PEC) system. The Fe-TNAs exhibited red-shifted absorption wavelength and reduced recombination of photo-generated electron-hole pairs, leading to enhanced TCE degradation.
Article
Chemistry, Multidisciplinary
Yijun Feng, Guohua Liu, Jinliang Xu, Kaiying Wang, Wenbin Mao, Guansheng Yao
Summary: Particle separation can be achieved by the fast dynamics of droplet impact on soap films. This viscous separation can be controlled in a deterministic manner by selectable impact parameters. This study is important for soft matter research and the study of droplets with colloid and surface chemistry.
Article
Engineering, Chemical
Shikun Li, Bin Liu, Xiao Jia, Min Xu, Zhangli Liu, Guohua Liu, Xiulan Huai
Summary: This study develops a facile and environmental strategy to fabricate flexible composite films that combine biodegradable bacterial cellulose (BC), polydopamine (PDA), and highly thermally conductive hexagonal boron nitride (h-BN). By optimizing the size of h-BN fillers, the composite films exhibit enhanced thermal conductivity and mechanical performance. The composite films are suitable for cooling high-power LED modules and flexible wearable devices.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Kim Robert Gustavsen, Erik Andrew Johannessen, Kaiying Wang
Summary: In this study, a simple method was developed to prepare uniform Cu(OH)2 nanoneedle films through pre-treatment and anodization. The films exhibited excellent catalytic properties, favoring CO2 reduction with suppressed methane production.
Article
Engineering, Chemical
Shikun Li, Bin Liu, Xiao Jia, Min Xu, Ruoyu Zong, Xunfeng Li, Guohua Liu, Xiulan Huai
Summary: Understanding the relationship between the physical properties of composite components and thermal conductivity is crucial for improving overall heat-dissipation performance. A numerical simulation was conducted to investigate the anisotropic thermal conductivity and heat flux distributions of h-BN/nanofiber composite films. Factors such as the intrinsic thermal conductivity of the matrix and filler, filler geometry and orientation, and interface thermal resistance were considered. The study found that increasing the intrinsic thermal conductivity of the matrix and tuning the interface thermal resistance could enhance the thermal conductivity, while the contributions from increasing filler conductivity and length were limited.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Zhou Zhao, Zengxing Zhang, Junmin Jing, Rui Gao, Zhiwei Liao, Wenjun Zhang, Guohua Liu, Yonghua Wang, Kaiying Wang, Chenyang Xue
Summary: Black silicon, as a representative of micro/nano-textured silicon, has excellent light absorption properties and is gradually replacing standard silicon in photoelectric devices. This article summarizes recent theoretical and experimental breakthroughs in near-infrared and ultraviolet detection using black silicon. The application of black silicon in infrared detection is discussed, including the use of element doping, localized surface plasmon resonance effect, and heterojunction formation. Additionally, the application of black silicon in ultraviolet detection through induced junction and self-built electric field is introduced. The growing potential of black silicon in near-infrared and ultraviolet detection applications, such as infrared night vision imaging and national defense early warning, is further discussed.
Review
Engineering, Environmental
Zubair Masaud, Guohua Liu, Lars Eric Roseng, Kaiying Wang
Summary: Pulsed electrocatalysis presents a promising alternative for achieving higher process control, enhanced efficiency, and improved selectivity in electrochemical processes. This article provides a comprehensive overview of pulsed electrocatalysis, including mechanistic details, process parameter optimization, and demonstrations of its potential in cutting-edge applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Tao Feng, Guohua Liu, Gang Li, Yan Li, Jianguo Liang, Kaiying Wang
Summary: Supercapacitors are a promising energy storage solution in the face of increasing demand for electrification. This review summarizes recent progress on iron-based materials in supercapacitors, focusing on their applications and techniques for enhancing performance, as well as future challenges.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Zheng Liu, Ting Chen, Guohua Liu
Summary: This study establishes a coupled ion transport model to investigate the effects of surface and space charges on energy conversion in nanochannels. It is found that the coupled charges enhance the energy conversion performance, and this enhancement can be further increased by adjusting the density and thickness of the polyelectrolyte layer. The presence of space charges introduces frictional resistance, but it is insignificant in concentration-gradient energy conversion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Yi Zhang, Guoli Zhang, Juncheng Wu, Jiangyong Yu, Gang Li, Taotao Guan, Kaiying Wang
Summary: Porous carbon nanosheets (PCNs) were obtained by regulating the abundance of the dangling-bonds grafted on the CTP molecules. The PCNs showed high specific capacitance and good electrochemical performance due to their large specific surface area, suitable pore structure, and good two-dimensional structure. Assembled symmetrical EDLCs using K+ DES electrolyte exhibited satisfactory energy density and could work in a wide temperature range from -40°C to 75°C, opening up a new way for large-scale preparation of electrode materials suitable for ultra-low temperature capacitors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xiaohui Yan, Gang Li, Kai Shen, Congwei Wang, Kaiying Wang
Summary: Nanostructured hematite shows promise as a semiconductor for PEC water oxidation but suffers from inadequate charge separation and sluggish kinetics. In this study, a nanotubular Fe2O3/Fe3O4 p-n heterojunction with dual IEFs is prepared, which promotes charge carrier separation/migration and enhances PEC performance. The addition of In2O3 clusters forms a second IEF and further improves the hole-collection efficiency. The composite photoanode achieves a state-of-the-art current density and a superior photon-to-current efficiency, making it a potential candidate for efficient PEC catalysts.
Article
Chemistry, Multidisciplinary
Hao Huang, Kaiying Wang
Summary: Conductive metal-organic frameworks exhibit excellent single-atom electrocatalytic activities, but their application is limited by the fragility of the coordinated frameworks. This study presents a metal-covalent organic framework strategy to construct a catalyst for nitrate reduction, which provides abundant metal sites and a reasonable platform for studying the catalytic mechanism of single-metal atoms.
Article
Chemistry, Multidisciplinary
Nan Zhang, Gang Li, Zhichao Yu, Zhenguo Tang, Xiaoyan Liu, Congwei Wang, Kaiying Wang
Summary: This work demonstrates the tuning of interfacial electronic properties by spontaneous photodeposition of metallic cluster co-catalyst on edge active sites, leading to enhanced charge carrier separation and surface redox reactions, thus resulting in superior photocatalytic performance.
Article
Chemistry, Physical
Yijun Feng, Lin Wang, Jinliang Xu, Guohua Liu
Summary: This study investigates the effects of particle size on particle separation from liquid marbles. It is found that the active regime of the stripping mode can be selectively controlled by tuning the particle size, with smaller stabilizing particles resulting in a wider stripping regime. The experimental results provide guidelines for applications involving phase separation.
