Article
Chemistry, Physical
Ayesha Sabir, Tauqir A. Sherazi, Qijie Xu
Summary: The Ag-doped TiO2 nanophotocatalyst embedded in a porous polymer showed efficient degradation of pollutants with a retention rate of 97% in up to 10 cycles, making it a sustainable solution for pollution abatement.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Ceramics
M. Mousavi, T. Ghorbani-Moghadam, A. Kompany
Summary: The La0.7Sr1.3CoO4 Ruddlesden-Popper oxide exhibited good photocatalytic properties under UV irradiation, showing high degradation efficiency for methyl orange dye. The presence of H2O2 further enhanced the catalytic performance, suggesting promising applications for dye degradation.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Condensed Matter
Anoop Singh, Aamir Ahmed, Asha Sharma, Chandan Sharma, Satya Paul, Ajit Khosla, Vinay Gupta, Sandeep Arya
Summary: The study prepared core-shell structured Ag-CdS@Pr-TiO2 nanoparticles and investigated their photocatalytic activity for degrading methyl orange under visible light. Various techniques confirmed the composition, morphology, and optical properties of the synthesized core/shell nanoparticles. The synthesized material showed potential for efficiently degrading methyl orange based on the discoloration of dye within 30 minutes.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Sagar Kite, Abhijit Nanaso Kadam, Dattatraya J. Sathe, Satish Patil, Sawanta S. Mali, Chang Kook Hong, Sang-Wha Lee, Kalyanrao M. Garadkar
Summary: In this study, TiO2 sensitized by MoS2 heterostructures were prepared and showed improved photocatalytic activity for the degradation of MO. The optimal loading of MoS2 was found to be 5.0 wt %, leading to a 21% increase in MO photodegradation efficiency under UV-vis light compared to pristine TiO2. The enhanced performance was attributed to efficient charge transfer, high surface area, and elevated surface oxygen vacancies.
Article
Materials Science, Multidisciplinary
Chanagun Wongburapachart, Phuwadej Pornaroontham, Kyusung Kim, Pramoch Rangsunvigit
Summary: Photocatalysis is an eco-friendly technology that can contribute to achieving the Sustainable Development Goals. However, conventional photocatalysts have limitations such as slow kinetics, limited excitation wavelengths, and environmental restrictions. This study focuses on the development of a photo-chargeable photocatalyst that can operate even in the absence of light, and investigates the effects of synthesis conditions on its photocatalytic properties.
Article
Chemistry, Physical
Luminita Predoana, Elena Madalina Ciobanu, Gabriela Petcu, Silviu Preda, Jeanina Pandele-Cusu, Elena Maria Anghel, Simona Viorica Petrescu, Daniela Cristina Culita, Adriana Baran, Vasile-Adrian Surdu, Bogdan Stefan Vasile, Adelina C. C. Ianculescu
Summary: The tin-doped TiO2 powders were synthesized using sol-gel and microwave-assisted sol-gel methods, with different amounts of SnO2 precursor. The structure and morphology of the annealed nanopowders were characterized using various techniques. The Sn-doped materials showed high photocatalytic efficiency for the removal of methyl orange dye from aqueous solutions, with a degradation efficiency of around 90% after 3 hours of UV light irradiation.
Article
Chemistry, Inorganic & Nuclear
Ning Wang, Zhentao Zhao, Lin Liu, Jinjuan Xing
Summary: Metal oxide semiconductor, particularly titanium dioxide (TiO2), is widely used in photocatalytic treatment of dye wastewater, but faces challenges such as low sunlight utilization and fast recombination of electron-hole pairs. Through synthesizing muscovite supported TiO2 with tungsten dopant, this study achieved improved separation efficiency of photoinduced carriers and enhanced photocatalytic activity, providing a novel strategy for preparing efficient and stable TiO2-based photocatalytic materials.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Environmental Sciences
Vu Quang Hieu, Thanh Khoa Phung, Thanh-Quang Nguyen, Afrasyab Khan, Van Dat Doan, Vy Anh Tran, Van Thuan Le
Summary: Photocatalytic activity is an effective solution to address environmental pollution caused by industrial pollutants. The Ti3C2-TiO2 composite, with its unique structure, enhances the efficiency of organic dye degradation and exhibits good stability.
Article
Chemistry, Multidisciplinary
Shenglan Liao, Liqin Lin, Jiale Huang, Xiaolian Jing, Shiping Chen, Qingbiao Li
Summary: In this study, hollow SiO2 microspheres were synthesized using biological templates and TiO2-SiO2 microspheres were prepared through the hydrothermal process. The structures and physicochemical properties of TiO2-SiO2 photocatalysts were characterized, and their photocatalytic activity towards methyl orange degradation was evaluated.
Article
Chemistry, Multidisciplinary
Awras H. Ajil, Naser M. Ahmed, F. K. Yam, Zakariyya Uba Zango, Ismael A. Wadi, Ayed M. Binzowaimil, Osamah Aldaghri, Khalid H. Ibnaouf, Humberto Cabrera
Summary: In this study, 1% Ce-doped ZnO nanoparticles were synthesized using laser-assisted chemical bath synthesis technique and showed high efficiency in degrading Methyl Orange dye, especially under solar radiation.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Essam F. . Abo Zeid, Fatma M. Obiedallah, Abdel-Hamid Abu-Sehly, Walied A. A. Mohamed, Mohamed Abd El-Aal
Summary: In this study, pure and doped Co3O4 nanoparticles were synthesized. The doped samples showed smaller crystallite sizes, wider optical band gaps, and improved magnetic properties compared to pure Co3O4. The CdNi-doped sample exhibited the highest photocatalytic efficiency, attributed to the extrinsic defect generated by CdNi doping, small particle size, and high surface area.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Multidisciplinary
Jia You, Liyuan Zhang, Lihua He, Bingqing Zhang
Summary: ZnO-TiO2/SO42- (ZTOS) heterojunction composites were prepared using an inorganic precipitation-peptization method, exhibiting enhanced photocatalytic activity and stability. The molar ratios of Zn : Ti were found to significantly influence the performance. The heterojunction structure of ZnO-TiO2 provided stronger light absorption and efficient charge separation.
Article
Environmental Sciences
Maryam Hasanpour, Siamak Motahari, Dengwei Jing, Mohammad Hatami
Summary: The study synthesized Cellulose/Zinc Oxide-x hybrid aerogel with various concentrations of Zn2+ ion using the hydrothermal method for organic pollutant removal. The results showed excellent photocatalytic degradation efficiency of methyl orange under UV irradiation with a degradation rate of 99.02% and mineralization rate of 51.68% under optimized conditions. The synthesized photocatalyst exhibited good recyclability and easy separation from the aqueous solution.
Article
Materials Science, Multidisciplinary
Shikun Chen, Daochuan Jiang, Guang Zeng, Haibo Chi, Li Li, Yunxia He, Fei Ke, Juan-Ding Xiao, Sheng Ye
Summary: This study successfully synthesized dysprosium-doped CoFe2O4 composites with enhanced photocatalytic activity and magnetic recovery capability. The introduction of dysprosium significantly improved the magnetic property of the material, while also enhancing its photocatalytic activity for methyl orange degradation.
Article
Chemistry, Physical
Xiaomeng You, Hailong Huang, Ran Zhang, Zhongli Yang, Min Xu, Xuelu Wang, Yefeng Yao
Summary: This study successfully developed hydrogels with embedded TiO2 nanoparticles as photocatalysts for the photodegradation of organic dyes. The results showed that the hydrogels maintained their original structures and exhibited photodegradation efficiencies close to freely distributed TiO2 nanoparticles in solution. Additionally, immobilizing the TiO2 nanoparticles into the hydrogels reduced loss during utilization and allowed for easy reuse, retaining high photocatalytic degradation performance after multiple degradation-regeneration cycles.
Article
Geochemistry & Geophysics
Lihao Song, Bowen Bai, Xiaoping Li, Gezhao Niu, Yanming Liu, Yiding Mao
Summary: Hypersonic vehicle-borne synthetic aperture radar (SAR) imaging has promising application prospects for remote sensing due to its fast response and flexible trajectory. However, the phenomenon of plasma sheath during hypersonic flight has a serious impact on hypersonic vehicle-borne SAR imaging. Therefore, this study systematically investigates the effect of plasma sheath on hypersonic vehicle-borne SAR imaging. Analytical formulas are derived for the phase shift, amplitude attenuation, linear phase errors, and quadratic phase errors, providing insights into the image shift, pulse broadening, submerged point target response, and asymmetric distortion caused by plasma sheath. Quantitative evaluation and analysis of SAR imaging degradation under different conditions are conducted, contributing to the improvement of hypersonic vehicle-borne SAR imaging under plasma sheath in the future.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Physics, Fluids & Plasmas
Lihao Song, Bowen Bai, Xiaoping Li, Gezhao Niu, Yanming Liu, Yiding Mao
Summary: This paper studies the characteristics of radar reflection signals in a multi-domain using a closed plasma generator. A computation method is proposed for radar signals reflected by a metal covered with plasma, and the reflected signal characteristics are analyzed in the time, frequency, and correlation domain. An experimental device is designed to verify the computation method, and the results show the amplitude attenuation and frequency dispersion in the time and frequency domain, as well as a significant decrease in peak value in the correlation domain, demonstrating the stealth effect of plasma.
PHYSICS OF PLASMAS
(2023)
Article
Engineering, Electrical & Electronic
Lihao Song, Eng Leong Tan, Ding Yu Heh, Bowen Bai, Xiaoping Li, Yanming Liu
Summary: This article proposes a novel finite-difference time-domain (FDTD) method for studying electromagnetic wave propagation in time-varying plasma. The method, called the Newton-ADE FDTD method, is based on Newton's equation of motion and provides more accurate results compared to traditional methods in time-varying plasma conditions.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Physics, Fluids & Plasmas
Bo Yao, Lei Shi, Xiaoping Li, Yifan Wang, Zongyuan Liu
Summary: This article proposes an efficient simulation method by establishing the mapping relationship between electron density distribution and hypersonic plasma channel envelope and phase. It significantly reduces the simulation time of hypersonic plasma channels and provides an efficient and accurate channel environment for research on adaptive communication methods for hypersonic vehicles.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Physics, Fluids & Plasmas
Yi Ding, Bowen Bai, Gezhao Niu, Xiaoping Li, Yanming Liu
Summary: In this article, the reflection and transmission coefficients of each layer of nonuniform plasma are calculated using the equivalent wave impedance method. The reflection intensity distribution mechanism of nonuniform plasma is analyzed, and the electromagnetic shielding effect of plasma is revealed. The research results provide a theoretical foundation for analyzing the echo signal characteristics of targets covered with plasma sheaths, suppressing radar detection anomalies, and achieving electromagnetic stealth.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Engineering, Aerospace
Sibo Zhao, Jianwen Zhu, Weimin Bao, Xiaoping Li
Summary: This manuscript presents a three-dimensional high-dynamic intelligent maneuvering guidance strategy based on optimal control and deep reinforcement learning (DRL) to address the coordination between maneuvering penetration and high-precision guidance in complex flight missions of high-velocity vehicle. The strategy utilizes a longitudinal maneuvering model with instantaneous miss distance as a control variable and employs the maximum value principle to obtain the optimal maneuver duration and start timing. In the lateral direction, a Markov decision process model is proposed to synthesize guidance error and miss distance and a reward function is designed considering maneuver and guidance performance. The simulation results demonstrate that the intelligent maneuvering guidance strategy can improve penetration performance, reduce the influence of maneuver flight on guidance accuracy, and ensure adaptability under changeable flight missions.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2023)
Article
Chemistry, Analytical
Zhiming Zhao, Xiaoping Li, Guoxiang Dong
Summary: Traditional stealth technologies have problems of high cost and large thickness, which can be solved by using novelty checkerboard metasurface in stealth technology. The hybrid checkerboard metasurface with two types of polarization converter units arranged in turn can effectively reduce radar cross-section (RCS) and be insensitive to the polarization of incoming EM waves. The experiment and simulation results prove the effectiveness of mutual compensation in the field of checkerboard metasurfaces for stealth technology.
Article
Nanoscience & Nanotechnology
Xiaoping Li, Xinpeng Wang, Lei Dong, Qing Zou, Chunlin He, Yanqiu Zhu, Toyohisa Fujita, Changzhong Liao, Cheng-Wei Kao, Ying-Rui Lu
Summary: In this study, a nanocomposite of bismuth sulfide coated with SiO2 nanofibers was prepared for capturing gaseous iodine. The adsorption capacity of Bi2S3@SiO2 for iodine was higher than other bismuth-based adsorbents. The nanocomposites showed stability up to 300 degrees C and the reactions with I2 vapor resulted in the formation of BiI3. The research demonstrated the potential of these nanostructure-based membranes for capturing iodine in nuclear power plant off-gas streams.
ACS APPLIED NANO MATERIALS
(2023)
Article
Construction & Building Technology
Xiaoping Li, Yitong Li, Haizhu Zhou, Zheng Fu, Xionglei Cheng, Wei Zhang
Summary: Global excessive CO2 emissions caused environmental and health problems, China has set a dual carbon goal, the building sector accounts for a significant portion of carbon emissions in China, particularly public buildings, establishing a reasonable baseline of carbon emissions is important, this study investigates the carbon emissions of public buildings in Tianjin and determines the dynamic baseline from 2022 to 2030.
Review
Biotechnology & Applied Microbiology
Hongmin Wang, Christa C. C. Huber, Xiao-Ping Li
Summary: Alzheimer's disease (AD) is a common form of dementia, affecting over 10% of the population aged 65 and older. AD is characterized by progressive loss of neurons and synapses, formation of amyloid plaques and neurofibrillary tangles, neuroinflammation, blood-brain barrier breakdown, mitochondrial dysfunction, and oxidative stress. Stem cell-derived exosomes show promise in treating AD as they possess anti-apoptotic, anti-inflammatory, and antioxidant properties. These exosomes also promote neurogenesis, angiogenesis, and BBB repair. This review discusses the neuropathological features of AD and explores the use of stem cell-derived exosomes in AD therapy.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Aerospace
Haifeng Sun, Dingkai Yao, Lirong Shen, Zhongwen Deng, Weiming Bao, Xiaoping Li, Wencong Wang, Qingyong Zhou
Summary: Using observations of millisecond pulsars, this study compares the 5-year rotation stability between X-ray data from NICER and radio data from NANOGrav. The analysis includes data screening, parameter fitting, and consideration of factors affecting pulsar rotation stability. The results show that the rotation stability of PSR B1937 + 21 based on NICER observations is comparable to NANOGrav data, with an accuracy of 1.7 x 10-14.
Article
Engineering, Chemical
Xiao Su, Xiaoping Li, Yi Zhang, Qing Guo, Xingguo Zhang, Haixia Yu, Dachao Li
Summary: This paper presents a simple and cost-effective method for fabricating a microreactor array chip that enables high-throughput DNA synthesis with a three orders of magnitude enhancement in synthesis capacity. The chip is made by inkjet printing a massive droplet array of silica nanoparticle slurry on a chemically-modified surface. The dense microreactor array is obtained through the three-phase contact line (TCL)-confined nanoparticle aggregating process, controlled by the receding contact angle (RCA) of the modified substrates. The proposed microarray chip shows great potential for high-throughput and high-capacity DNA synthesis.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
He Huang, Xiaoping Li, Shizhong Liu, Yanming Liu
Summary: This article introduces a new strategy to reduce antenna height. The basic idea is to replace the half-wave dipole with a full-wave dipole to maintain a large input impedance. By adjusting the position and rotation of the arms, a half-sized dipole with an input impedance of 50Ω is obtained. The improved structure allows for wideband applications and expansion into a dual-polarized subarray with a height of only 0.08λ.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Physics, Fluids & Plasmas
Qiongjie Zhang, Xiaoping Li, Min Yang, Yanming Liu, Haojie Zhang
Summary: During reentry, a hypersonic vehicle is covered by a plasma sheath, causing attenuation of electromagnetic waves and resulting in radio blackout when the equivalent frequency of plasma is higher than the carrier frequency. However, the parameters of the plasma sheath change randomly, allowing some random time slots where the plasma's equivalent frequency is lower than the carrier frequency, enabling electromagnetic waves to penetrate the sheath. In order to make use of the plasma sheath channel's spatial-temporal resources and receive complete frames in random time slots, an adaptive space-time short-frame fountain code (ASTSFFC) is proposed.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Environmental Sciences
Zhen Cui, Wei Zheng, Fan Wu, Xiaoping Li, Keke Xu, Xiaofei Ma, Jinwen Shi, Xiao Tao, Cheng Zhu, Xingang Zhang
Summary: This article proposes a method based on the novel signal bandwidth joint principle to improve the resolution of GNSS-R pulse-limited footprints. By jointly processing the signals of E5a and E5b frequency bands, the method reduces the main lobe width of the auto-correlation function (ACF) of the GNSS-R signal, thus improving the pulse-limited footprint resolution of GNSS-R.