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Modifying BiVO4 as a photocatalyst for water oxidation using constant-duration alkaline-etched post treatments

New Journal of Chemistry 2023年第2期48卷 569-577页

作者： Hsu, Chuan-Chih Chuang, Kai-Jie Huang, Hsiao-Wen Pan, Bo-Jin Chen, Hung-Ming Husain, Sadang Yougbaré, Sibidou Hsiao, Yu-Cheng Wu, Yung-Fu Lin, Lu-Yin Division of Cardiovascular Surgery Department of Surgery School of Medicine College of Medicine Taipei Medical University Taiwan Division of Cardiovascular Surgery Department of Surgery Taipei Medical University Hospital Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Gingen Technology Co. Ltd. Rm. 7 10F. No. 189 Sec. 2 Keelung Rd. Xinyi Dist. Taipei11054 Taiwan Department of Physics Faculty of Mathematics and Natural Science Lambung Mangkurat University Banjarmasin70124 Indonesia /Nanoro Ouagadougou03 Burkina Faso International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Stanford Byers Center for Biodesign Stanford University CA94305-5428 United States Graduate Institute of Biomedical Optomechatronics College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei11696 Taiwan

BiVO4 with suitable band edges and a small band gap is considered an efficient photocatalyst for the oxygen evolution reaction (OER), but short charge-transfer lengths limit its photocatalytic ability. Increasing active sites can essentially enhance oxidation reactions and photocatalytic ability. The alkaline etching technique can refine the surface properties of BiVO4 by introducing oxygen vacancies and possibly establishing a heterojunction, but suitable alkaline etching methods are rarely discussed. In this study, three alkaline etching methods, including hydrothermal, soaking, and electrodeposition processes, are first applied for a constant duration to tailor the surface properties of BiVO4 as a photocatalyst for the OER. Alkaline-etched BiVO4 prepared using hydrothermal and soaking processes shows better photocatalytic abilities due to the generation of additional oxygen vacancies, while poor photocatalytic ability is found for that fabricated using electrodeposition due to the formation of less photocatalytic VO2. The highest photocurrent density of 2.38 mA cm−2 is obtained at 1.23 V versus a reversible hydrogen electrode in an electrolyte without a hole scavenger for the BiVO4 etched in the hydrothermal process, while the untreated BiVO4 presents a photocurrent density of 0.58 mA cm−2. A photocurrent retention of 92.3% is achieved after 5000 seconds of continuous illumination. The study supplies blueprints for establishing effective alkaline etching methods for enhancing the photocatalytic ability of BiVO4, with the exception of time costs. © 2024 The Royal Society of Chemistry.

关键词： Charge transfer

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Analysis of the Musculoskeletal Load Generated when a Small Dog Walks on a Slippery Floor*

Analysis of the Musculoskeletal Load Generated when a Small ...

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IEEE/SICE International Symposium on System Integration

作者： Shijian Li Daisuke Chugo Satoshi Muramatsu Sho Yokota Jin-Hua She Hiroshi Hashimoto Uemura Takashi Hiroaki Kamishina Yoshiharu Hata Takayuki Yamada Takahiro Uchida Graduate School of Science and Technology Kwansei Gakuin University Sanda Japan School of Information Science and Technology Tokai University Hiratsuka Japan Faculty of Science and Engineering Toyo University Kawagoe Japan School of Engineering Tokyo University of Technology Tokyo Japan Master Program of Innovation for Design and Engineering Advanced Institute of Industrial Technology Tokyo Japan KyotoAR Animal Advanced Medical Center Kyoto Japan Rinrei Co. Ltd. Tokyo Japan

ISBN: (数字)9798331531614

ISBN: (纸本)9798331531621

The objective of this paper is to identify the stresses placed on the musculoskeletal system when small dogs walk on floors with low friction coefficients. In many households, and small dogs in particular are often kept indoors. According to veterinary experience, it is known that small dogs kept indoors that walk with their lower limbs slipping cause a great deal of stress on the musculoskeletal system, and that the incidence of joint disease in the lower limbs of such small dogs is high. In this study, we measured the body movements of small dogs walking on slippery floors using a three-dimensional motion capture system and force plate system. Furthermore, by inputting these measurements into the musculoskeletal simulation model we have developed to simulate the musculoskeletal system of dogs, we derived the load on the musculoskeletal system of small dogs on slippery and non-slippery floors. As a result, it was identified that walking on a slippery floor causes a strong load on the lower limb muscles of small dogs.

关键词： Legged locomotion Limbs Friction Dogs System integration Muscles Object recognition Floors Stress Paints

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A Critical Review on Cryopreservation of Cells Technics: Thermal Aspects 6th

A Critical Review on Cryopreservation of Cells Technics: The...

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6th Multiphase Flow Journey, JEM 2021

作者： Steffenon, Guilherme D. Copetti, Jacqueline B. de Oliveira, Jeferson D. Macagnan, Mario H. Cardoso, Elaine M. the University of Vale do Rio dos Sinos Mechanical Engineering Graduate Program LETEF Laboratory of Thermal and Fluid Dynamic Studies Unisinos Avenue 950 RS São Leopoldo93022-750 Brazil FSG—University Center Center of Innovation and Technology Department of Mechanical Engineering Os Dezoito do Forte 2366 RS Caxias do Sul95020-472 Brazil UNESP—São Paulo State University Post-Graduation Program in Mechanical Engineering Brasil Avenue 56 SP Ilha Solteira15385-000 Brazil

ISBN: (纸本)9783030934552

The studies carried out in the area of cell preservation have been of significant importance in recent years. This process, known as cryopreservation, has been used for decades and aims to preserve various cellular materials at cryogenic temperatures. Different methods allow cryopreservation, where the best known are the slow freezing and vitrification processes. Regardless of the process, it is necessary to use cryoprotective agents (CPAs) in conjunction with the cells to avoid possible cell damage during cryopreservation. Regarding the methods, they differ in their cooling rates and the concentration of CPAs used. According to some studies, the method that has been most studied is that of vitrification, which seeks to increase the cooling rate, reaching values above 20,000 ∘ C/min. Evaporation by a thin film of liquid nitrogen is one of the methods of vitrification, which uses a microstructure with a finned or porous surface for evaporation, and in these conditions cooling rates of up to 150,000 ∘ C/min were found, which shows a significant advance and alternative for cell cryopreservation. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Cryopreservation Slow freezing Thin film evaporation Vitrification

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IoT for Water Quality Categorization 5

IoT for Water Quality Categorization

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5th International Conference on Cybernetics and Intelligent Systems, ICORIS 2023

作者： Sastrohartono, Hermantoro Krisdiarto, Andreas Wahyu Uktoro, Arief Ika Rahutomo, Reza Suparyanto, Teddy Pardamean, Bens Institute of Agriculture Stiper Faculty of Agricultural Technology Agricultural Engineering Department Yogyakarta Indonesia Bina Nusantara University School of Information Systems Information System Department Jakarta11480 Indonesia Bina Nusantara University Bioinformatics & Data Science Research Center Jakarta11480 Indonesia Bina Nusantara University Binus Graduate Program Master of Computer Science Computer Science Department Jakarta11480 Indonesia

ISBN: (纸本)9798350369489

In agricultural water research, the adoption of Internet of Things (IoT) technology has emerged as a pivotal approach for large-scale data collection. Water availability in the context of water quality is very important, both for domestic and industrial purposes. For domestic purposes, drinking water and bathing water are separated. Meanwhile, for the palm oil industry, boiler filler is differentiated from additional process water (dilution water). Water quality parameters can be assessed from turbidity and Total Dissolve Solid (TDS). Measurements using measuring instruments separately and repeatedly require significant energy, time, and costs. This research was conducted with the primary objective of presenting a novel method for categorizing water quality with the approach of IoT sensor technology. The research methodology entailed the utilization of an integrated IoT water sensors system in conjunction with manual water categorization. The methods consist of (1) system design, (2) design and installation of sensor and IoT-based microcontrollers, and (3) accuracy and precision testing compared with laboratory measurements. The precision of the integrated IoT water sensors was assessed through a dedicated sensor precision test, resulting in an accuracy rate of 94.4% for the turbidity sensor and 97.5% for the TDS sensor. Notably, this approach successfully discriminated drinking water with valid categorization, while other water types, including groundwater, water with tea, and water with coffee, yielded null categorization results. © 2023 IEEE.

关键词： Internet of things

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Resveratrol production of a recombinant Scheffersomyces stipitis strain from molasses

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Biotechnology Notes 2022年 3卷 1-7页

作者： Kobayashi, Yuma Inokuma, Kentaro Matsuda, Mami Kondo, Akihiko Hasunuma, Tomohisa Graduate School of Science Technology and Innovation Kobe University 1-1 Rokkodai-cho Nada-ku Kobe 657-8501 Japan Engineering Biology Research Center Kobe University 1-1 Rokkodai-cho Nada-ku Kobe 657-8501 Japan Biomass Engineering Program RIKEN 1-7-22 Suehiro-cho Tsurumi-ku Kanagawa Yokohama 230-0045 Japan

Resveratrol is a plant-derived aromatic compound with beneficial properties and it is required to develop a resveratrol production process from inexpensive biomass feedstocks. Here, we investigated the potential of Scheffersomyces stipitis, a non-conventional yeast with the capacity to utilize a wide range of sugars, to produce resveratrol from molasses, which is a by-product of sugar refineries. The S. stipitis strain metabolically engineered for resveratrol production produced resveratrol from 60 g/L mixed sugar (sucrose, glucose, and fructose), while its resveratrol titer decreased as the proportions of glucose and fructose increased. Sucrose consumption of the S. stipitis strain was clearly suppressed by the coexistence of glucose, fructose, and even ethanol. Quantitative analysis of intracellular metabolites involved in resveratrol biosynthesis using capillary electrophoresis time-of-flight mass spectrometry revealed that the composition of these sugars has a significant effect on the intracellular accumulation of glycolytic metabolites and AMP, which is an important factor involved in some cellular metabolic responses. Furthermore, the S. stipitis strain produced 1076 ± 167 mg/L of resveratrol in the fermentation with commercial sugarcane molasses (120 g/L of total sugars) as the substrate. To our knowledge, this is the first report on carbon catabolite repression in S. stipitis caused by the coexistence of sucrose, glucose, and fructose and resveratrol production from molasses. These results indicate great potential of the cost-effective resveratrol production process from molasses substrates using recombinant S. stipitis. © 2021 The Authors

关键词： Carbon catabolite repression Intracellular metabolite analysis Molasses Non-conventional yeast Resveratrol Scheffersomyces stipitis

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Gas Permeation Properties of Bridged-Type Organosilica Membranes at Extremely Low Temperatures and the Application to Oxygen Separation

SSRN

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SSRN 2023年

作者： Izumi, Ryouhei Moriyama, Norihiro Ishizaki, Kazutoshi Nagasawa, Hiroki Tsuru, Toshinori Kanezashi, Masakoto Chemical Engineering Program Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima739-8527 Japan Cryogenic Separation Technology Group Tsukuba Development Center Taiyo Nippon Sanso Corporation Tsukuba300-2611 Japan

A bridged-type organosilica, bis(triethoxysilyl)methane (BTESM) membrane was evaluated in detail for single-gas permeation at temperatures ranging from -130 to -200 oC, and for binary (O2/He, O2/N2) separation at 30 and -115oC, respectively. The permeance of He, Ar, and N2 demonstrated a trend of activated diffusion as permeance increased with an increase in the temperature;O2 permeance, however, reached its maximum value at about -80 oC. O2 permeance increased with a decrease in the temperature (30 to -80 oC), and permeance then gradually decreased (-80 to -130 oC), which demonstrates surface diffusion. In the case of O2/He binary separation, both O2 and He permeated according to molecular sieving at 30 oC, but at -115 oC, O2/He selectivity was enhanced approximately 10-fold due to permeation blockage by adsorbed O2. On the other hand, in the case of O2/N2 binary separation at -115 oC, the effect of permeation blocking by adsorbed O2 permeance was lessened due to the effect of competitive adsorption, which translated to a level of O2/N2 selectivity that was only 1.5-fold higher than that at 30 oC. © 2023, The Authors. All rights reserved.

关键词： Temperature

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Gas Permeation Properties of Bridged-Type Organosilica Membranes at Extremely Low Temperatures and the Application to Oxygen Separation

SSRN

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SSRN 2023年

A bridged-type organosilica, bis(triethoxysilyl)methane (BTESM) membrane was evaluated in detail for single-gas permeation at temperatures ranging from -130 to -200 oC, and for binary (O2/He, O2/N2) separation at 30 and -115oC, respectively. The permeance of He, H2, Ar, and N2 demonstrated a trend of activated diffusion as permeance increased with an increase in the temperature;O2 permeance, however, was increased with a decrease in the temperature, and permeance then gradually decreased, which demonstrated surface diffusion. In the case of O2/He binary separation, both O2 and He permeated according to molecular sieving at 30 oC, but at -115 oC, O2/He selectivity was enhanced approximately 10-fold due to permeation blockage by adsorbed O2. On the other hand, in the case of O2/N2 binary separation at -115 oC, the effect of permeation blocking by adsorbed O2 permeance was lessened due to the effect of competitive adsorption, which translated to a level of O2/N2 selectivity that was only 1.5-fold higher than that at 30 oC. © 2023, The Authors. All rights reserved.

关键词： Permeation

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Study on triphase of polymorphs TiO2 (anatase/rutile/brookite) for boosting photocatalytic activity of metformin degradation

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Chemosphere 2024年 351卷

作者： Eddy, Diana Rakhmawaty Nur Sheha, Geometry Amal Permana, Muhamad Diki Saito, Norio Takei, Takahiro Kumada, Nobuhiro Irkham Rahayu, Iman Abe, Ikki Sekine, Yuta Oyumi, Tomoki Izumi, Yasuo Department of Chemistry Faculty Mathematics and Natural Sciences Universitas Padjadjaran Sumedang45363 Indonesia Special Educational Program for Green Energy Conversion Science and Technology Integrated Graduate School of Medicine Engineering and Agricultural Sciences University of Yamanashi Kofu400-8511 Japan Center for Crystal Science and Technology University of Yamanashi Kofu400-8511 Japan Department of Chemistry Graduate School of Science Chiba University Chiba263-8522 Japan

The elution of pharmaceutical products such as metformin at higher concentrations than the safe level in aquatic systems is a serious threat to human health and the ecosystem. Photocatalytic technology using TiO2 semiconductors potentially fixes this problem. This study aims to synthesize triphasic anatase–rutile–brookite TiO2 using ultrasound assisted sol–gel technique in the presence of acid and its application to photodegradation of metformin under UV light irradiation. Based on X-ray diffraction analysis, a TiO2 sample consisted of anatase (76%), rutile (7%), and brookite (17%) polymorph (A76R7B17) that was fully crystallized. Scanning electron microscopy (EM)–energy dispersive X-ray spectra results showed agglomerated triphasic A76R7B17 with irregular spherical clusters. Transmission EM results revealed that the crystal size of A76R7B17 was 4–14 nm. The Brunauer–Emmett–Teller analysis showed the sample's specific surface area of 149 m2 g−1. The degradation test of metformin demonstrated that the A76R7B17 exhibited a 75.4% degradation efficiency after 120 min under UV light irradiation, significantly higher than using biphasic and single-phase TiO2 photocatalysts. This difference could be attributed to the heterojunction effect of triphasic materials that effectively reduced electron–hole recombination rate as well as the combination of effective electron transfer from conduction band of brookite and anatase and the utilization of wider range of UV–visible light using rutile. © 2024 Elsevier Ltd

关键词： Titanium dioxide

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Evaluation of 3D Virtualization Accuracy for VR-Based Personal Basketball Team-Practice System 10

Evaluation of 3D Virtualization Accuracy for VR-Based Person...

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10th IEEE Global Conference on Consumer Electronics, GCCE 2021

作者： Honma, Hiroki Iida, Yoshiaki Okumura, Yasuyuki Fujii, Katsuyuki Umehira, Masahiro Nanzan University Graduate Program of Mechatronics Graduate School of Science And Engineering Nagoya Japan Nanzan University Physical Education Center Nagoya Japan Nanzan University Faculty of Science And Engineering Department of Mechatronics Nagoya Japan Department of Electronics And Communication Technology Faculty of Science And Engineering Nanzan University Nagoya Japan

ISBN: (纸本)9781665436762

In basketball game, players need to learn how to take a next appropriate action by judging various situations with surrounding players through team practice. Such decision-making capabilities in individual practice with virtual reality (VR) technologies can significantly improve the efficiency of team practice. This paper proposes a VR-based basketball team practice learning system which provides VR environments similar to the actual team practice environments by arranging players in a virtual space Proto-type application for smartphones has been developed for 3D virtualization accuracy evaluation where the smartphone is used for team practice to sense the distance between the player and surrounding VR players This paper describes the evaluation results of 3D virtualization accuracy measured by the experiments. © 2021 IEEE.

关键词： Virtual reality

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Development of an HV-CMOS active pixel sensor "AstroPix" for all-sky medium-energy gamma-ray telescopes 38

Development of an HV-CMOS active pixel sensor "AstroPix" for...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Suda, Yusuke Caputo, Regina Steinhebel, Amanda L. Fleischhack, Henrike Striebig, Nicolas Jadhav, Manoj Luz, Ricardo Violette, Daniel Kierans, Carolyn Tajima, Hiroyasu Fukazawa, Yasushi Leys, Richard Peric, Ivan Metcalfe, Jessica Negro, Michela Perkins, Jeremy S. Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan NASA Goddard Space Flight Center GreenbeltMD United States Catholic University of America 620 Michigan Ave NE WashingtonDC20064 United States Center for Research and Exploration in Space Science and Technology NASA/GSFC GreenbeltMD20771 United States ASIC and Detector Laboratory Karlsruhe Institute of Technology Karlsruhe Germany Argonne National Laboratory LemontIL60440 United States Institute for Space Earth Environmental Research Kobayashi-Maskawa Institute for The Origin of Particles and the Universe Nagoya University Japan

All-sky medium-energy gamma-ray observations are essential to deepen our understanding of physics in extreme astronomical objects such as gamma-ray bursts and active galactic nuclei. Those observations are also highly needed to further develop multi-messenger astronomy. Next-generation all-sky MeV gamma-ray telescopes must have a large area detector and keep high sensitivities even in the energies in which Compton scattering is dominant. Having both a silicon tracker (scatterer) and a calorimeter (absorber) as the main detector is a promising configuration for such a space mission. In order to fulfill the requirements such as a large sensitive area, low noise, high energy/positional resolution, and low power, we have been developing an HV-CMOS active pixel sensor, AstroPix. In this contribution, we report performance evaluations of AstroPix such as I-V and noise, energy calibration/resolution/threshold, and depletion depth measurements. Current achievements as a sensor for next-generation all-sky MeV gamma-ray telescopes and future development will be discussed. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： CMOS integrated circuits

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