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Matsui K, Katsumata H, Furukawa M, Tateishi I, Kaneco S. Determination of low concentrations of glucose through colorimetric analysis using CoFe 2O 4 magnetic catalyst and SAT-3. ANAL SCI 2024:10.1007/s44211-024-00554-2. [PMID: 38602663 DOI: 10.1007/s44211-024-00554-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/04/2024] [Indexed: 04/12/2024]
Abstract
Natural enzyme mimics have attracted attention as alternatives to natural peroxidases. Among these, magnetic nanoparticles, especially ferrites, have attracted attention because of their unique electronic and physical structures, which are expected to be applied in various fields, including high-frequency magnetic materials, biomaterials, gas sensors, and semiconductor photocatalysts. The structural properties of the synthesized catalysts were investigated using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The prepared CoFe2O4 exhibited a spinel ferrite structure and formed a wood-flake-like bulk structure. In this study, magnetic CoFe2O4 was prepared using a precipitation method as a natural enzyme mimetic. CoFe2O4 showed excellent peroxidase-like activity, as demonstrated by the Michaelis-Menten constant (Km) and the maximum velocity (Vmax). The linear ranges of the calibration curves for H2O2 and glucose were in the range of 0-500 µM, and the detection limits were 1.83 and 5.91 µM, respectively. This analytical method was applied for the determination of glucose in human serum, and the results were satisfactory and consistent with certified values. The performance of this sensor was comparable to or superior to those of several other sensors commonly used for glucose analysis, indicating that its practical application is feasible.
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Affiliation(s)
- Kurumi Matsui
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan.
| | - Hideyuki Katsumata
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan.
| | - Mai Furukawa
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
| | - Ikki Tateishi
- Global Environmental Center for Education & Research, Mie University, Tsu, Mie, 514-8507, Japan
| | - Satoshi Kaneco
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
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Tateishi I, Kuwahara S, Furukawa M, Katsumata H, Kaneco S. O-doped g-C 3N 4 prepared in pyridine for efficiently photocatalytic hydrogen production. Environ Technol 2023:1-11. [PMID: 38032269 DOI: 10.1080/09593330.2023.2283799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Oxygen-doped g-C3N4 with pyridine ring (POCN) was synthesized by easily thermal polymerization of urea, pyridine solution, and ammonium acetate to improve photocatalytic hydrogen production. The experimental results indicate that pyridine was incorporated into the tri-s-triazine structure of g-C3N4. The O atoms were modified to g-C3N4 by replacing the N atoms (C-N=C) of the triazine ring. The photocatalytic activity for the hydrogen production rate of optimized POCN was 1018 µmol g-1 h-1, approximately 30 times higher than that of bulk g-C3N4 (CN) under visible light irradiation (λ > 420 nm). The high stability of POCN was confirmed through cycling tests for 30-h, XRD patterns, and SEM images. The pyridine incorporation can significantly enhance surface charge transfer efficiency. The oxygen modification can greatly promote visible light absorption (600 nm) and photogenerated electron-hole pairs separation. This work provides a suitable strategy to synthesize g-C3N4 based on metal-free photocatalysts for highly efficient photocatalytic hydrogen generation performance.
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Affiliation(s)
- Ikki Tateishi
- Global Environment Center for Education and Research, Mie University, Tsu, Japan
| | - Shuhei Kuwahara
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
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Suhag MH, Katsumata H, Tateishi I, Furukawa M, Kaneco S. Black Phosphorus-Doped Graphitic Carbon Nitride with Aromatic Benzene Rings for Efficient Photocatalytic Hydrogen Production. Langmuir 2023; 39:13121-13131. [PMID: 37672653 DOI: 10.1021/acs.langmuir.3c01518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Graphitic carbon nitride (g-C3N4, abbreviated as g-CN) suffers from low visible-light-responsive photocatalytic efficiency. In this study, aromatic benzene rings and black phosphorus (BP) were successfully incorporated into g-CN photocatalysts (BP/A-CN), resulting in modified materials with improved properties. Structural analysis confirmed the successful integration of aromatic rings and BP into the g-CN framework, indicating the formation of a stable composite. Morphological characterization revealed that the introduction of aromatic rings and BP did not cause any significant changes in the nanosheet-like morphology of the g-CN photocatalysts. To evaluate the photocatalytic hydrogen production activity under visible-light irradiation, various compositions of aromatic benzene rings and BP were investigated. Specifically, the BP/A-CN composite exhibited an enhanced photocatalytic hydrogen production rate (860 μmol g-1 h-1), which was approximately 4.0 times higher than that of g-CN (210 μmol g-1 h-1). The improved hydrogen production rates observed in the modified g-CN photocatalysts can be attributed to several factors. First, the aromatic benzene rings and BP enhanced light absorption, thereby improving the efficient utilization of solar energy. Additionally, the presence of these components in the composite photocatalysts reduced electron-hole recombination, thereby facilitating improved charge transfer and separation efficiencies. Overall, this study demonstrates the potential of incorporating aromatic benzene rings and BP into g-CN photocatalysts for efficient solar energy conversion. These findings contribute to the development of novel photocatalytic materials with enhanced performance and highlight the versatility of g-CN-based composites for various applications in environmental and energy fields.
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Affiliation(s)
- Mahmudul Hassan Suhag
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
- Department of Chemistry, University of Barishal, Barishal 8254, Bangladesh
| | - Hideyuki Katsumata
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Ikki Tateishi
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Mie 514-8507, Japan
| | - Mai Furukawa
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Satoshi Kaneco
- Department of Applied Chemistry, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
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Islam JB, Islam MR, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Ag-modified g-C 3N 4 with enhanced activity for the photocatalytic reduction of hexavalent chromium in the presence of EDTA under ultraviolet irradiation. Environ Technol 2023; 44:3627-3640. [PMID: 35443874 DOI: 10.1080/09593330.2022.2068379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
The photocatalytic reduction of Cr6+ to Cr3+ in an aqueous solution, using 3 wt% Ag/g-C3N4 in the presence of ethylenediaminetetraacetic acid (EDTA), has been investigated here. The photocatalytic reduction of Cr6+ with pure g-C3N4 was very low. The addition of Ag and EDTA can significantly improve the photocatalytic reduction of Cr6+ using g-C3N4. In the presence of EDTA, the efficiency with Ag/g-C3N4 was better than those with Au/g-C3N4 and Cu/g-C3N4. With EDTA, the reduction rate constant increased from 0.0005 for pure g-C3N4 to 0.12 min-1 for 3 wt% Ag/g-C3N4. By increasing the concentration of EDTA from 0 to 500 mg L-1, the reduction efficiency of Cr6+ increased extremely, and the rate constant raised from 0.008 to 0.12 min-1. The optimal EDTA concentration was 500 mg L-1 for the photocatalyst Ag/g-C3N4. The Ag-EDTA complex may be reduced to metallic silver by the conduction band electrons of g-C3N4. The electron-hole recombination was significantly suppressed by the electron trapping of Ag. EDTA may act in by the formation of Cr3+-complex and the separation of Cr3+ from the g-C3N4 surface and by the valence band hole scavenger of g-C3N4. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS) and photoluminescence spectra (PL) were used to characterize g-C3N4 and Ag/g-C3N4 nanoparticles. A possible mechanism for photocatalytic Cr6+ reduction has also been demonstrated.
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Affiliation(s)
- Jahida Binte Islam
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Md Rakibul Islam
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University, Mie, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
- Global Environment Center for Education & Research, Mie University, Mie, Japan
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Suhag MH, Khatun A, Tateishi I, Furukawa M, Katsumata H, Kaneco S. One-Step Fabrication of the ZnO/g-C 3N 4 Composite for Visible Light-Responsive Photocatalytic Degradation of Bisphenol E in Aqueous Solution. ACS Omega 2023; 8:11824-11836. [PMID: 37033806 PMCID: PMC10077555 DOI: 10.1021/acsomega.2c06678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/05/2023] [Indexed: 06/19/2023]
Abstract
The ZnO/g-C3N4 composite was successfully synthesized by a simple one-step calcination of a urea and zinc acetate mixture. The photocatalytic activity of the synthesized composite was evaluated in the degradation of bisphenol E (BPE). The morphology, crystallinity, optical properties, and composition of the synthesized composite were characterized by using various analytical techniques such as scanning electron microscopy (SEM), transmitted electron microscopy (TEM), field emission-electron probe microanalysis (FE-EPMA), nitrogen adsorption and desorption isotherm measurement, Fourier-transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The degradation rate of BPE with the ZnO/g-C3N4 composite was 8 times larger than that obtained with pure g-C3N4 at the optimal conditions. The excellent photocatalytic activity was attributed to the synergistic effect between the g-C3N4 and ZnO, which enhanced the efficiency of charge separations, reduced the e-/h+ pairs recombination, and increased the visible light absorption ability. The radical scavenger studies indicated that the •O2 - and h+ species were mainly responsible for the degradation of BPE. The stability test suggested the chemical and photostability of the synthesized composite. Two possible photocatalytical mechanisms have been suggested.
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Affiliation(s)
- Mahmudul Hassan Suhag
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
- Department
of Chemistry, University of Barishal, Barishal 8254, Bangladesh
| | - Aklima Khatun
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Ikki Tateishi
- Environmental
Preservation Center, Mie University, Tsu, Mie 514-8507, Japan
| | - Mai Furukawa
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Hideyuki Katsumata
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Satoshi Kaneco
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
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Sugiura E, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Development of Ag/Ag 2O/ZnO photocatalyst and their photocatalytic activity towards dibutyl phthalate decomposition in water. J Air Waste Manag Assoc 2022; 72:1137-1152. [PMID: 35499520 DOI: 10.1080/10962247.2022.2071358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/22/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
The photocatalyst Ag/Ag2O-modified ZnO, fabricated by a simple one-step calcination method, was applied into the degradation of organic pollutant dibutyl phthalate (DBP). Ag/ZnO and Ag2O/ZnO were prepared as a reference comparison. The prepared catalysts were evaluated by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), BET surface area measurement, and photoluminescence spectra (PL) and UV-Vis diffuse reflectance spectroscopy (DRS) and electrochemical measurements. After the irradiation with ultraviolet light (352 nm), the solution was sampled and subjected to HPLC to evaluate the degradation efficiency of DBP. Ag/Ag2O/ZnO showed the best results with the excellent degradation of DBP. Ag/Ag2O/ZnO was four times more efficient, relative to zinc oxide alone. According to photocatalyst characterization, the total pore volume of photocatalyst was improved by loading Ag and Ag2O, suggesting an increase in the active sites. Also, the efficient electron transfer of Ag/Ag2O/ZnO was mainly responsible for the enhanced activity. The reaction mechanism for Ag/Ag2O/ZnO was determined to become a Z-scheme. From the radical scavenger tests, the main active species was identified as superoxide radicals. The stability of Ag/Ag2O/ZnO could be confirmed after five cycling reutilization. It was found from the radical scavenger test that •O2 - play an important role as the main reactive species in the photocatalytic degradation of DBP. Consequently, Ag/Ag2O/ZnO with a simple fabrication method seems to become one of the powerful photocatalyst for the photocatalytic degradation of organic pollutant in water.Implications: This study discusses the usefulness of Ag/Ag2O/ZnO composites. This photocatalyst could be an approach to solve the environmental pollution caused by organic pollutants, which is a growing problem all over the world. In addition, the highly efficient photocatalyst Ag/Ag2O/ZnO is an inexpensive and reusable catalyst with great practical potential.Furthermore, to the best of our knowledge, there are very few reports that have examined the combination of Ag, Ag2O and ZnO. In addition, the photocatalytic mechanism has not been understood. Here, we introduce Ag into Ag2O/ZnO to improve the photocatalytic performance and photostability, enhance the activity, and elucidate the mechanism of Ag/Ag2O/ZnO.
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Affiliation(s)
- Erisa Sugiura
- Department of Chemistry, Graduate School of Engineering, Mie University, Mie Japan
| | - Mai Furukawa
- Department of Chemistry, Graduate School of Engineering, Mie University, Mie Japan
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University, Mie Japan
| | - Hideyuki Katsumata
- Department of Chemistry, Graduate School of Engineering, Mie University, Mie Japan
| | - Satoshi Kaneco
- Department of Chemistry, Graduate School of Engineering, Mie University, Mie Japan
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Tateishi I, Furukawa M, Katsumata H, Kaneco S. Photocatalytic degradation of bisphenol A using O-doped dual g-C3N4 under visible light irradiation. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Katsumata H, Kawanishi T, Furukawa M, Tateishi I, Kaneco S. Mixed Hemimicelles Solid phase Extraction of Atrazine and Simazine from Environmental Water Samples Using Alumina-Coated Magnetite Composite Material. J Anal Chem 2022. [DOI: 10.1134/s1061934822050045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Samad A, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Highly efficient visible light-induced photocatalytic oxidation of arsenite with nanosized WO 3 particles in the presence of Cu 2+ and CuO. Environ Technol 2022:1-12. [PMID: 35262453 DOI: 10.1080/09593330.2022.2051607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
Although WO3 appears to be one of the extensively studied photocatalysts, the low response of pure WO3 in aqueous solution under visible light limits its application remarkably. In this work, the enhancement of the efficiency of WO3 for the visible light-driven photocatalytic oxidation of arsenite was explored using Cu2+ ion and CuO as a co-catalyst. While the addition of Cu2+ was found effective for the suppression of dissolution of WO3, the efficiency of CuO appeared to be slightly lower. Significant improvement of the efficiency for the photocatalytic oxidation of As(III) with WO3 was noted when Cu2+ ions and CuO were added. The optimized conditions were WO3 in the presence of 10 mg L-1 Cu2+ ion and 1 wt% CuO coupled with WO3, respectively. The As(III) concentration of 10 mg L-1 could be lowered to less than 0.1 mg L-1 by the photocatalytic treatment. Acidic pH favours the oxidation of arsenite in the presence of Cu2+ whereas basic pH is suitable with CuO. Characterization techniques such as TEM, XPS, XRD and UV-DRS were used to characterize photocatalysts. The reactive species scavenger tests revealed that the photo-induced holes (h+) play a key role in the photocatalytic oxidation process while the effect of •OH is negligible. It was found that As(III) oxidation rate was remarkably suppressed in the nitrogen atmosphere. A mechanism for enhanced photocatalytic oxidation has been proposed based on the results of the reactive species scavenger tests. This research may contribute to the large-scale As(III) oxidation treatment in the groundwater.
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Affiliation(s)
- Abdus Samad
- Department of Chemistry, Jagannath University, Dhaka, Bangladesh
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Ikki Tateishi
- Mie Global Environment Centre for Education & Research, Mie University, Tsu, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
- Mie Global Environment Centre for Education & Research, Mie University, Tsu, Japan
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Yanagi G, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Electrochemical decolorization of methylene blue in solution with metal doped Ti/α,β-PbO₂ mesh electrode. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2021.1896550] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Genta Yanagi
- Department of Chemistry for Materials, Faculty of Engineering, Mie University, Mie Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Faculty of Engineering, Mie University, Mie Japan
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University, Mie, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Faculty of Engineering, Mie University, Mie Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Faculty of Engineering, Mie University, Mie Japan
- Global Environment Center for Education & Research, Mie University, Mie, Japan
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Wada T, Mori‐Anai K, Kawaguchi Y, Katsumata H, Tsuda H, Iida M, Arakawa K, Jardine MJ. Renal, cardiovascular and safety outcomes of canagliflozin in patients with type 2 diabetes and nephropathy in East and South-East Asian countries: Results from the Canagliflozin and Renal Events in Diabetes with Established Nephropathy Clinical Evaluation Trial. J Diabetes Investig 2022; 13:54-64. [PMID: 34212533 PMCID: PMC8756319 DOI: 10.1111/jdi.13624] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 06/23/2021] [Accepted: 06/27/2021] [Indexed: 11/28/2022] Open
Abstract
AIMS/INTRODUCTION The sodium-glucose cotransporter 2 inhibitor, canagliflozin, reduced kidney failure and cardiovascular events in the Canagliflozin and Renal Events in Diabetes with Established Nephropathy Clinical Evaluation (CREDENCE) trial. We carried out a post-hoc analysis to evaluate the efficacy and safety of canagliflozin in a subgroup of participants in East and South-East Asian (EA) countries who are at high risk of renal complications. MATERIALS AND METHODS Participants with an estimated glomerular filtration rate of 30 to <90 mL/min/1.73 m2 and urinary albumin-to-creatinine ratio of >300-5,000 mg/g were randomized to 100 mg of canagliflozin or a placebo. The effects of canagliflozin treatment on pre-specified efficacy and safety outcomes were examined using Cox proportional hazards regression between participants from EA countries (China, Japan, Malaysia, the Philippines, South Korea and Taiwan) and the remaining participants. RESULTS Of 4,401 participants, 604 (13.7%) were from EA countries; 301 and 303 were assigned to the canagliflozin and placebo groups, respectively. Canagliflozin lowered the risk of primary outcome (composite of end-stage kidney disease, doubling of serum creatinine level, or renal or cardiovascular death) in EA participants (hazard ratio 0.54, 95% confidence interval 0.35-0.84). The effects of canagliflozin on renal and cardiovascular outcomes in EA participants were generally similar to those of the remaining participants. Safety outcomes were similar between the EA and non-EA participants. CONCLUSIONS In the CREDENCE trial, the risk of renal and cardiovascular events was safely reduced in participants from EA countries at high risk of renal events.
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Affiliation(s)
- Takashi Wada
- Department of Nephrology and Laboratory Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Graduate School of Medical SciencesKanazawa UniversityKanazawaJapan
| | - Kazumi Mori‐Anai
- Ikuyaku. Integrated Value Development DivisionMitsubishi Tanabe Pharma CorporationTokyoJapan
| | - Yutaka Kawaguchi
- Ikuyaku. Integrated Value Development DivisionMitsubishi Tanabe Pharma CorporationTokyoJapan
| | - Hideyuki Katsumata
- Ikuyaku. Integrated Value Development DivisionMitsubishi Tanabe Pharma CorporationOsakaJapan
| | - Hidetaka Tsuda
- Ikuyaku. Integrated Value Development DivisionMitsubishi Tanabe Pharma CorporationTokyoJapan
| | - Mitsutaka Iida
- Ikuyaku. Integrated Value Development DivisionMitsubishi Tanabe Pharma CorporationTokyoJapan
| | - Kenji Arakawa
- Ikuyaku. Integrated Value Development DivisionMitsubishi Tanabe Pharma CorporationTokyoJapan
| | - Meg J Jardine
- The George Institute for Global Health, UNSWSydneyAustralia
- NHMRC Clinical Trials CenterUniversity of SydneySydneyAustralia
- Concord Repatriation General HospitalSydneyAustralia
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Ashraful Islam Molla M, Katsumata H, Furukawa M, Tateishi I, Kaneco S. Synthesis of an iso-type graphitic carbon nitride heterojunction derived from oxamide and urea in molten salt for high-performance visible-light driven photocatalysis. NEW J CHEM 2022. [DOI: 10.1039/d2nj00741j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thrice-modified g-C3N4 with cyano groups and an asymmetric planar heptazine/triazine-based iso-type heterojunction structure (MOCN) exhibits significantly higher photocatalytic activity.
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Affiliation(s)
- Md. Ashraful Islam Molla
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
- Department of Applied Chemistry & Chemical Engineering, University of Dhaka, Dhaka-1000, Bangladesh
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Ikki Tateishi
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Mie 514-8507, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
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13
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Islam JB, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Formic acid motivated photocatalytic reduction of Cr(VI) to Cr(III) with ZnFe 2O 4 nanoparticles under UV irradiation. Environ Technol 2021; 42:2740-2748. [PMID: 31916510 DOI: 10.1080/09593330.2020.1713902] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 01/05/2020] [Indexed: 06/10/2023]
Abstract
UV-light irradiated photocatalytic reduction of Cr(VI) to Cr(III) in aqueous solution using ZnFe2O4 nanoparticles in the presence of formic acid was reported. X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and UV-Vis diffuse reflectance spectroscopy (DRS) were employed to characterize ZnFe2O4 nanoparticles. The photocatalytic activity of pure ZnFe2O4 under UV irradiation was significantly low. However, the Cr(VI) reduction efficiency on nano-sized ZnFe2O4 in the presence of 0.40% formic acid reached 95.4% within 4 h. Herein, the effect of pH, photocatalyst amount, initial concentration of Cr(VI) and formic acid concentration on the photocatalytic reduction of Cr(VI) was investigated. The results indicated that the photocatalytic reduction of Cr(VI) decreased with increase in the initial concentration of Cr(VI), photocatalyst dosage and pH. The reduction rate constant declined from 0.017 min-1 to 0.0023 min-1 with the increase in initial concentration of Cr(VI) from 5 to 25 mg L-1. However, the reduction rate constant sharply increased from 0.000075 min-1 to 0.0127 min-1 with the increase in formic acid concentration from 0.05% to 0.40%. The formic acid could capture the photogenerated holes, and eventually formate (HCOO-) ions could be converted into carbon dioxide radicals (•CO2-). Because of more negative redox potential for •CO2- radicals, Cr(VI) species could easily be reduced to Cr(III) under UV irradiation. The pseudo-first-order kinetic reaction was confirmed for this reduction process. A tenable mechanism for the photocatalytic Cr(VI) reduction has also been demonstrated.
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Affiliation(s)
- Jahida Binte Islam
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University, Tsu, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
- Global Environment Center for Education & Research, Mie University, Tsu, Japan
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Molla MAI, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Mineralization of Diazinon with nanosized-photocatalyst TiO 2 in water under sunlight irradiation: optimization of degradation conditions and reaction pathway. Environ Technol 2020; 41:3524-3533. [PMID: 31072234 DOI: 10.1080/09593330.2019.1615129] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 04/03/2019] [Indexed: 05/19/2023]
Abstract
The photocatalytic degradation of Diazinon under sunlight irradiation is investigated by using the nanosized photocatalyst TiO2. Eight intermediates are detected during the degradation, and the reaction pathway is proposed on the base of their intermediates. The degradation parameters, concerning photocatalyst concentration, temperature, pH, sunlight intensity and irradiation time are optimized. Under the optimal conditions, the photocatalytic degradation of Diazinon can be completed within 60 min. The photodegradation is found to follow the pseudo-first-order kinetic law at a rate constant of 0.068 min-1. The activation energy is 14.7 kJ/mol. The formations of sulphate, phosphate, nitrate and ammonium ions during the degradation are observed. About 83% of the initial N is detected as ammonium and nitrate ions during 50 h of irradiation time.
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Affiliation(s)
- Md Ashraful Islam Molla
- Department of Applied Chemistry & Chemical Engineering, Faculty of Engineering & Technology, University of Dhaka, Dhaka, Bangladesh
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Ikki Tateishi
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Japan
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Japan
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15
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Islam JB, Islam MR, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Performance of EDTA modified magnetic ZnFe 2O 4 during photocatalytic reduction of Cr(VI) in aqueous solution under UV irradiation. J Environ Sci Health A Tox Hazard Subst Environ Eng 2020; 56:44-51. [PMID: 33090933 DOI: 10.1080/10934529.2020.1835389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 10/07/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
The photocatalytic reduction of toxic Cr(VI) to non-pernicious Cr(III) using ZnFe2O4/EDTA (ethylenediaminetetraacetic acid) under UV irradiation was evaluated. The reduction of Cr(VI) with bare ZnFe2O4 under UV irradiation was negligible. However, the Cr(VI) in the solution was completely reduced within 3 h after the introduction of EDTA. EDTA could consume valence band holes and could be oxidized by holes into inorganic products. Therefore, photo-generated electrons could be used to reduce Cr(VI) to Cr(III). The effect of concentration of EDTA, ZnFe2O4 photocatalyst dosages, and initial pH on the photocatalytic reduction of Cr(VI) was investigated. The results revealed that the photocatalytic reduction of Cr(VI) accelerated by increasing EDTA concentration and ZnFe2O4 dosage. The present reduction process confirms the pseudo-first-order kinetic reaction. The quasi reduction rate constant increased from 3.5 x 10-4 min-1 to 2.6 x 10-2 min-1 with the increase in initial EDTA concentration from 0 to 1000 mg L-1. The acidic solution is preferable for the photocatalytic reduction of Cr(VI). The entire reduction of Cr(VI) was carried out within 2 h under the optimum conditions with pH 2, 20 mg ZnFe2O4, and 500 mg L-1 EDTA. The formation of [Cr-EDTA]3+ complex may be advantageous to accelerate the Cr(VI) reduction. A probable mechanism for the photocatalytic Cr(VI) reduction was speculated here.
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Affiliation(s)
- Jahida Binte Islam
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Md Rakibul Islam
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University, Mie, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan
- Global Environment Center for Education & Research, Mie University, Mie, Japan
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Tateishi I, Furukawa M, Katsumata H, Kaneco S. Efficient photocatalytic hydrogen production by Zn(1−2x)CuxIn2S(4−1.5x) co-doped with Cu and excess in under visible light irradiation. SN Appl Sci 2020. [DOI: 10.1007/s42452-020-03450-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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17
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Katsumata H, Sakakibara K, Tateishi I, Furukawa M, Kaneco S. Structurally modified graphitic carbon nitride with highly photocatalytic activity in the presence of visible light. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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18
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Islam JB, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Photocatalytic degradation of a typical neonicotinoid insecticide: nitenpyrum by ZnO nanoparticles under solar irradiation. Environ Sci Pollut Res Int 2020; 27:20446-20456. [PMID: 32246419 DOI: 10.1007/s11356-020-08424-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/12/2020] [Indexed: 06/11/2023]
Abstract
The photodegradation and mineralization of the nitenpyrum [(E)-N-(6-chloro-3-pyridylmethyl)-N-ethyl-N'-methyl-2-nitrovinylidenediamine], which is one of the most popular neonicotinoid insecticides, were conducted in the presence of ZnO photocatalyst under solar irradiation. An initial nitenpyrum concentration of 10 ppm was completely degraded in the presence of ZnO after 30 min irradiation, while only 70% degradation was observed in the absence of ZnO. The effect of different parameters, for example, amount of ZnO, initial pH, light intensity, reaction temperature, and irradiation time, on the photocatalytic degradation of nitenpyrum was also evaluated. The drop of total organic carbon (TOC) as a consequence of mineralization of nitenpyrum was observed during the photocatalytic process. The kinetics of photocatalytic degradation followed a pseudo-first order law according to Langmuir-Hinshelwood model, and the rate constant is 0.140 min-1. CO2, chloride, and nitrate ions were observed as the end-products after completing degradation of nitenpyrum. The four kinds of intermediate products were identified by GC-MS during the decomposition of nitenpyrum. In order to investigate the degradation pathway of nitenpyrum, the point charge and frontier electron density at each atom on the molecule were determined using molecular orbital (MO) stimulation. The degradation mechanism was proposed, based on the identified intermediates. The solar photocatalytic degradation method can become an effective technique for the treatment of nitenpyrum-polluted water.
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Affiliation(s)
- Jahida Binte Islam
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan.
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University, Tsu, Mie, 514-8507, Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
- Global Environment Center for Education & Research, Mie University, Tsu, Mie, 514-8507, Japan
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Hayakawa S, Kato R, Katsumata H. "New Horizons in Analytical Sciences of Functional Materials". ANAL SCI 2020; 36:3. [PMID: 31932532 DOI: 10.2116/analsci.ge2001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Affiliation(s)
| | - Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology, Japan
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Furukawa M, Tateishi I, Katsumata H, Kusunoki R, Kaneco S. Nanocomposite Magnetite-Kaolin for Rh Preconcentration and Determination by Electrothermal Atomic Absorption Spectrometry. ANAL SCI 2020; 36:87-90. [PMID: 31787670 DOI: 10.2116/analsci.19san01] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A preconcentration technique with a magnetite-kaolin adsorbent capable of magnetic separation was developed for the determination of rhodium in environmental samples. The magnetite-kaolin nanocomposite was prepared for the preconcentration of rhodium in an aqueous solution prior to an electrothermal atomic absorption spectrometric determination. The detection limit (3S/N) of rhodium was 16 pg mL-1 under the optimum conditions. Even though matrix elements existed in 103 fold excess in aqueous solution, the rhodium adsorption could be not affected by the matrix. The present method could be applied to the determination of Rh in an aqueous solution. The advantages are easy preparation of the adsorbent and fast magnetic separation.
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Affiliation(s)
- Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
| | - Ikki Tateishi
- Global Environment Center for Education & Research, Mie University
| | - Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
| | - Risako Kusunoki
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University.,Global Environment Center for Education & Research, Mie University
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Takahara M, Shiraiwa T, Matsuoka TA, Yamamoto K, Maeno Y, Shiraiwa Y, Yoshida Y, Katakami N, Iijima H, Katsumata H, Arakawa K, Hashimoto T, Shimomura I. Investigation of the Effect of Canagliflozin on the Disposition Index, a Marker of Pancreatic Beta Cell Function, in Patients with Type 2 Diabetes. Diabetes Metab Syndr Obes 2020; 13:4457-4468. [PMID: 33244248 PMCID: PMC7683829 DOI: 10.2147/dmso.s273396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/25/2020] [Indexed: 11/29/2022] Open
Abstract
AIM Our aim was to investigate the effects of add-on canagliflozin with glimepiride dose adjustment or glimepiride dose adjustment on pancreatic beta cell function in patients with type 2 diabetes mellitus and inadequate glycemic control despite stable triple therapy (metformin, teneligliptin, and glimepiride) plus diet/exercise therapy. METHODS Forty patients on stable triple therapy were randomized to glimepiride dose adjustment without (glimepiride group) or with add-on canagliflozin 100 mg (canagliflozin group) for 24 weeks. The glimepiride dose was adjusted every 4 weeks based on continuous glucose monitoring over the previous 2 weeks according to a prespecified algorithm. After the 24-week treatment period, the patients returned to the pre-intervention regimen for 1 week (wash-out period). Patients underwent 75 g OGTTs at the start of the run-in period and at the end of the wash-out period. The primary endpoint was the change in disposition index (DI). RESULTS Thirty-nine patients completed the study (canagliflozin, n = 19; glimepiride, n = 20). The change in DI was +5.1% and -11.0% in the canagliflozin and glimepiride groups, respectively, with a between-group difference ratio of 18.0% (P = 0.330). HbA1c, fasting plasma glucose, body weight, and daily-life continuous glucose monitoring-derived parameters improved in the canagliflozin group. Hypoglycemia occurred in 60% (44 episodes) and 70% (79 episodes) of patients in the canagliflozin and glimepiride groups, respectively. The change in DI was significantly correlated with the changes in glycemic control and variability in overall cohort. CONCLUSION Adding canagliflozin to the triple therapy improved beta cell function by 18%, but it did not reach statistical significance. This study also demonstrated a correlation between the change in DI and glycemic control. As canagliflozin improved both glucose level and variability with relatively lower risk of hypoglycemia compared with glimepiride dose adjustment, adding canagliflozin to the triple therapy may be clinically beneficial. TRIAL REGISTRATION UMIN000030208/jRCTs051180036.
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Affiliation(s)
- Mitsuyoshi Takahara
- Department of Diabetes Care Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | | | - Taka-aki Matsuoka
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
- Correspondence: Taka-aki Matsuoka Department of Metabolic Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka565-0871, JapanTel +81-6-6879-3732Fax +81-6-6879-3739 Email
| | | | | | | | | | - Naoto Katakami
- Department of Metabolism and Atherosclerosis, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroaki Iijima
- Ikuyaku. Integrated Value Development Division, Mitsubishi Tanabe Pharma Corporation, Tokyo, Japan
| | - Hideyuki Katsumata
- Ikuyaku. Integrated Value Development Division, Mitsubishi Tanabe Pharma Corporation, Osaka, Japan
| | - Kenji Arakawa
- Ikuyaku. Integrated Value Development Division, Mitsubishi Tanabe Pharma Corporation, Tokyo, Japan
| | - Toshio Hashimoto
- Ikuyaku. Integrated Value Development Division, Mitsubishi Tanabe Pharma Corporation, Tokyo, Japan
| | - Iichiro Shimomura
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
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Affiliation(s)
- Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University
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Katsumata H, Higashi F, Kobayashi Y, Tateishi I, Furukawa M, Kaneco S. Dual-defect-modified graphitic carbon nitride with boosted photocatalytic activity under visible light. Sci Rep 2019; 9:14873. [PMID: 31619695 PMCID: PMC6795803 DOI: 10.1038/s41598-019-49949-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 09/03/2019] [Indexed: 01/10/2023] Open
Abstract
The development of photocatalysts that efficiently degrade organic pollutants is an important environmental-remediation objective. To that end, we report a strategy for the ready fabrication of oxygen-doped graphitic carbon nitride (CN) with engendered nitrogen deficiencies. The addition of KOH and oxalic acid during the thermal condensation of urea led to a material that exhibits a significantly higher pseudo-first-order rate constant for the degradation of bisphenol A (BPA) (0.0225 min-1) compared to that of CN (0.00222 min-1). The enhanced photocatalytic activity for the degradation of BPA exhibited by the dual-defect-modified CN (Bt-OA-CN) is ascribable to a considerable red-shift in its light absorption compared to that of CN, as well as its modulated energy band structure and more-efficient charge separation. Furthermore, we confirmed that the in-situ-formed cyano groups in the Bt-OA-CN photocatalyst act as strong electron-withdrawing groups that efficiently separate and transfer photo-generated charge carriers to the surface of the photocatalyst. This study provides novel insight into the in-situ dual-defect strategy for g-C3N4, which is extendable to the modification of other photocatalysts; it also introduces Bt-OA-CN as a potential highly efficient visible-light-responsive photocatalyst for use in environmental-remediation applications.
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Affiliation(s)
- Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan.
| | - Fumiya Higashi
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
| | - Yuya Kobayashi
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
| | - Ikki Tateishi
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Mie, 514-8507, Japan
| | - Mai Furukawa
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Mie, 514-8507, Japan
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Kusutaki T, Katsumata H, Tateishi I, Furukawa M, Kaneco S. Tetrahedral UMOFNs/Ag 3PO 4 Core-Shell Photocatalysts for Enhanced Photocatalytic Activity under Visible Light. ACS Omega 2019; 4:15975-15984. [PMID: 31592468 PMCID: PMC6777078 DOI: 10.1021/acsomega.9b02042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 08/28/2019] [Indexed: 06/10/2023]
Abstract
A new visible-light-responsive tetrahedral ultrathin metal-organic framework nanosheet (UMOFNs)/Ag3PO4 composite photocatalyst with a core-shell structure was readily synthesized by sonication in an organic solvent. Characterization methods for the photocatalyst included X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and UV-vis diffuse reflectance spectroscopy. The XRD patterns of the composite photocatalyst before and after visible-light irradiation demonstrated that trace amounts of Ag ions in the composite photocatalyst easily transformed into Ag nanoparticles, which play a role in promoting charge separation at the interface of a heterojunction. The UMOFNs/Ag3PO4 composite photocatalyst showed higher photocatalytic activity for the photodegradation of 2-chlorophenol (2-CP) under visible-light irradiation (>420 nm) than Ag3PO4. The complete degradation of 2-CP was achieved in 7 min using the tetrahedral UMOFNs/Ag3PO4 core-shell photocatalyst, and the apparent reaction rate was approximately 26 times higher than that of pure Ag3PO4. Further, a scavenger experiment showed h+ and O2 •- were the major reactive species involved in the photocatalytic reaction system. This enhanced photocatalytic activity results from the efficient separation of photoinduced electron-hole pairs and the increase of interface area between Ag3PO4, UMOFNs, and the Ag nanoparticles.
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Affiliation(s)
- Tomoharu Kusutaki
- Department
of Chemistry for Materials, Graduate School of Engineering and Mie Global Environment
Center for Education & Research, Mie
University, Tsu, Mie 514-8507, Japan
| | - Hideyuki Katsumata
- Department
of Chemistry for Materials, Graduate School of Engineering and Mie Global Environment
Center for Education & Research, Mie
University, Tsu, Mie 514-8507, Japan
| | - Ikki Tateishi
- Department
of Chemistry for Materials, Graduate School of Engineering and Mie Global Environment
Center for Education & Research, Mie
University, Tsu, Mie 514-8507, Japan
| | - Mai Furukawa
- Department
of Chemistry for Materials, Graduate School of Engineering and Mie Global Environment
Center for Education & Research, Mie
University, Tsu, Mie 514-8507, Japan
| | - Satoshi Kaneco
- Department
of Chemistry for Materials, Graduate School of Engineering and Mie Global Environment
Center for Education & Research, Mie
University, Tsu, Mie 514-8507, Japan
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Molla MAI, Furukawa M, Tateishi I, Katsumata H, Kaneco S. Fabrication of Ag-doped ZnO by mechanochemical combustion method and their application into photocatalytic Famotidine degradation. J Environ Sci Health A Tox Hazard Subst Environ Eng 2019; 54:914-923. [PMID: 31046556 DOI: 10.1080/10934529.2019.1608793] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 04/12/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
Ag/ZnO nanocomposites are successfully synthesized at different Ag contents through simple, effective, high yield and low-cost mechanochemical combustion technique, with the addition of silver acetate to zinc acetate and oxalic acid mixture. The synthesized materials are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron spectroscopy (SEM), BET surface area analysis, UV - visible diffuse reflectance spectroscopy (UV - DRS) and photoluminescence spectroscopy (PL). It is shown that the prepared nanocomposites are composed of metallic Ag0 and wurtzite ZnO. The photocatalytic performance of different composites is evaluated by the degradation of Famotidine (FMT) under UV irradiation. The results indicate it that the maximum photodegradation rate is obtained with 6 wt% metallic Ag-decorated ZnO, and it is 2.1 times better than that obtained with pure ZnO. The photocatalytic degradation of FMT with Ag/ZnO is affected by various parameters such as calcination temperature and time, doping concentrations and reusability. The Ag/ZnO demonstrates higher activity due to the reduction of electron - hole recombination and Ag0 metal catalyst. The possible photocatalytic degradation mechanism of FMT with Ag/ZnO is estimated from the scavenger test.
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Affiliation(s)
- Md Ashraful Islam Molla
- a Department of Applied Chemistry & Chemical Engineering, Faculty of Engineering & Technology , University of Dhaka , Dhaka , Bangladesh
- b Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Japan
| | - Mai Furukawa
- b Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Japan
| | - Ikki Tateishi
- c Mie Global Environment Center for Education & Research, Mie University , Tsu , Japan
| | - Hideyuki Katsumata
- b Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Japan
| | - Satoshi Kaneco
- b Department of Chemistry for Materials, Graduate School of Engineering , Mie University , Tsu , Japan
- c Mie Global Environment Center for Education & Research, Mie University , Tsu , Japan
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Hayakawa S, Kato R, Katsumata H. "New Horizons in Analytical Sciences of Functional Materials". ANAL SCI 2019; 35:357. [PMID: 30971633 DOI: 10.2116/analsci.call1904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology
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Hayakawa S, Kato R, Katsumata H. "New Horizons in Analytical Sciences of Functional Materials". ANAL SCI 2019; 35:233. [PMID: 30853701 DOI: 10.2116/analsci.call1903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology
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Kusutaki T, Katsumata H, Tateishi I, Furukawa M, Kaneco S. Ternary dual Z-scheme graphitic carbon nitride/ultrathin metal–organic framework nanosheet/Ag3PO4 photocatalysts for boosted photocatalytic performance under visible light. RSC Adv 2019; 9:39843-39853. [PMID: 35541425 PMCID: PMC9076175 DOI: 10.1039/c9ra08292a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 11/27/2019] [Indexed: 12/20/2022] Open
Abstract
The enhanced photocatalytic activity of CN10UA results from fast charge transport through dual Z-scheme channels.
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Affiliation(s)
- Tomoharu Kusutaki
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
| | - Hideyuki Katsumata
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
| | - Ikki Tateishi
- Mie Global Environment Center for Education & Research
- Mie University
- Tsu
- Japan
| | - Mai Furukawa
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu
- Japan
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Samad A, Ahsan S, Tateishi I, Furukawa M, Katsumata H, Suzuki T, Kaneco S. Indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with TiO 2 in the presence of hole scavengers. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.05.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Dabwan AH, Imai D, Katsumata H, Suzuki T, Funasaka K, Kaneco S. Application of solidified sea bottom sediments into environmental bioremediation materials. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.09.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Niikura T, Kobayashi A, Kawabe M, Katsuma A, Yamakawa T, Katsumata H, Mafune A, Nakada Y, Yamamoto I, Tanno Y, Ohkido I, Okumi M, Ishida H, Yamamoto H, Yokoo T, Tanabe K. Clinicopathologic Impact of Early Medullary Ray Injury in Patients Following Kidney Transplantation. Transplant Proc 2017; 49:78-83. [PMID: 28104164 DOI: 10.1016/j.transproceed.2016.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Previously, we explored the histopathologic characteristics of medullary ray injury (MRI) inducing interstitial fibrosis and tubular atrophy (IF/TA) to determine its etiologies, which include calcineurin inhibitor (CNI) toxicity and urologic complications. However, we did not examine the effects of these etiologies on long-term kidney allograft prognosis, because biopsy timing differed among cases. AIM We examined the influence of early MRI on kidney allograft prognosis using protocol biopsies taken within a 3-month time frame. METHODS We defined early MRI as tubular degeneration with interstitial edema or mild fibrosis localized to the medullary ray. We divided 53 protocol biopsies into 2 groups, with and without early MRI. Early MRI+ cases with isometric vacuolization were classified as CNI toxicity; those with Tamm-Horsfall protein in the interstitium and a thyroidlike appearance were classified as urinary tract system abnormalities; remaining cases were classified as "others." We compared changes in serum levels of creatinine (sCr) over 3 years and fibrosis extent at 1 year. RESULTS The sCr levels were significantly higher in the MRI+ group than the MRI- group at 3 years (P = .024). Examining the 3 MRI+ subgroups, only the MRI+ urinary tract system abnormalities group had significantly high sCr levels compared to the MRI- group (P = .019). The MRI+ group showed significant signs of IF/TA at 1 year. CONCLUSIONS Early MRI after kidney transplantation was significantly more likely to develop IF/TA at 1 year and had higher sCr levels at 3 years. In such cases, intervention might preserve graft function over the long term.
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Affiliation(s)
- T Niikura
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - A Kobayashi
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan.
| | - M Kawabe
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - A Katsuma
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - T Yamakawa
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - H Katsumata
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - A Mafune
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Y Nakada
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - I Yamamoto
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Y Tanno
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - I Ohkido
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - M Okumi
- Department of Urology, Tokyo Women's Medical University, Tokyo, Japan
| | - H Ishida
- Department of Urology, Tokyo Women's Medical University, Tokyo, Japan
| | - H Yamamoto
- Department of Internal Medicine, Atsugi City Hospital, Kanagawa, Japan
| | - T Yokoo
- Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - K Tanabe
- Department of Urology, Tokyo Women's Medical University, Tokyo, Japan
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Islam Molla MA, Tateishi I, Furukawa M, Katsumata H, Suzuki T, Kaneco S. Evaluation of Reaction Mechanism for Photocatalytic Degradation of Dye with Self-Sensitized TiO<sub>2</sub> under Visible Light Irradiation. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/ojinm.2017.71001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Tabata Y, Ikada Y, Morimoto K, Katsumata H, Yabuta T, Iwanaga K, Kakemi M. Surfactant-Free Preparation of Biodegradable Hydrogel Microspheres for Protein Release. J BIOACT COMPAT POL 2016. [DOI: 10.1177/088391159901400501] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The preparation of biodegradable hydrogel microspheres in the absence of surfactants was carried out by a two-step procedure which involved the formation of non-crosslinked microspheres from gelatin based on its inherent gelation nature at low temperatures and the subsequent glutaraldehyde (GA) crosslinking. The size of the microspheres was controlled in the range of 3 to 100 μm by changing the concentration of gelatin or GA, the emulsification method, and the crosslinking time. Neutral aqueous solutions of proteins with different isoelectric points (IEPs) and molecular weights (Mws) were infused into freeze-dried hydrogel microspheres to produce protein-incorporated gelatin microspheres. In vitro protein release from the microspheres depended on the protein's IEP but not on the Mw. The incorporated basic proteins with IEPs > 7.0 were released initially from the acidic gelatin microspheres, followed by no substantial release, whereas a larger initial release of the incorporated acidic proteins with IEPs < 7.0 was observed. The basic gelatin microspheres exhibited an opposite relationship between proteins IEP and protein release. Noncharged dextran rapidly diffused out of acidic gelatin microspheres, irrespective of the Mw. These findings indicate that an ionic interaction with gelatin constituted hydrogel microspheres prevented oppositely charged protein from being released from gelatin under in vitro non-degradation conditions.
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Affiliation(s)
- Yasuhiko Tabata
- Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yoshito Ikada
- Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kazuhiro Morimoto
- Department of Pharmaceutics, Hokkaido University of Pharmaceutical Sciences, 7-1 Katsuraoka-cho, Otaru, Hokkaido 047-0264, Japan
| | - Hideyuki Katsumata
- Department of Pharmaceutics, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1041, Japan
| | - Toshiyuki Yabuta
- Department of Pharmaceutics, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1041, Japan
| | - Kazunori Iwanaga
- Department of Pharmaceutics, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1041, Japan
| | - Masawo Kakemi
- Department of Pharmaceutics, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1041, Japan
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Samad A, Furukawa M, Katsumata H, Suzuki T, Kaneco S. Photocatalytic oxidation and simultaneous removal of arsenite with CuO/ZnO photocatalyst. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.03.035] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hoshiyama N, H. A. Dabwan A, Katsumata H, Suzuki T, Furukawa M, Kaneco S. Enhanced Photocatalytic Degradation of Bisphenol A in Aqueous Solution by Ag-Doping ZnO. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/ojinm.2016.63003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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Samad A, Fukumoto T, H. A. Dabwan A, Katsumata H, Suzuki T, Furukawa M, Kaneco S. Enhanced Removal of Arsenite from Ground Water by Adsorption onto Heat-Treated Rice Husk. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/ojinm.2016.63004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Katsumata H, Ando H, Suzuki T, Kaneco S. Highly Efficient Photocatalytic Hydrogen Production over PdS@CdS+ZnS(en)0.5 Photocatalyst under Visible Light Irradiation. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b00451] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hideyuki Katsumata
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Hideki Ando
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Tohru Suzuki
- Mie Global Environment Center for Education & Research, Mie University, Tsu, Mie 514-8507, Japan
| | - Satoshi Kaneco
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
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Dabwan AHA, Yuki N, Asri NAM, Katsumata H, Suzuki T, Kaneco S. Removal of Methylene Blue, Rhodamine B and Ammonium Ion from Aqueous Solution by Adsorption onto Sintering Porous Materials Prepared from Coconut Husk Waste. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ojinm.2015.52003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Fukushima M, Okamoto Y, Katsumata H, Ishikawa M, Ishii S, Okamoto M, Minami S. Growth hormone ameliorates adipose dysfunction during oxidative stress and inflammation and improves glucose tolerance in obese mice. Horm Metab Res 2014; 46:656-62. [PMID: 24995855 DOI: 10.1055/s-0034-1381998] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Patients with adult growth hormone deficiency exhibit visceral fat accumulation, which gives rise to a cluster of metabolic disorders such as impaired glucose tolerance and dyslipidemia. Plasma growth hormone levels are lower in obese patients with metabolic syndrome than in healthy subjects. Here we examined the hypothesis that exogenous growth hormone administration regulates function of adipose tissue to improve glucose tolerance in diet-induced obese mice. Twelve-week-old obese male C57BL/6 J mice received bovine growth hormone daily for 6 weeks. In epididymal fat, growth hormone treatment antagonized diet-induced changes in the gene expression of adiponectin, leptin, and monocyte chemoattractant protein-1, and significantly increased the gene expression of interleukin-10 and CD206. Growth hormone also suppressed the accumulation of oxidative stress marker, thiobarbituric acid-reactive substances, in the epididymal fat and enhanced the gene expression of anti-oxidant enzymes. Moreover, growth hormone significantly restored glucose tolerance in obese mice. In cultured 3T3-L1 adipocytes, growth hormone prevented the decline in adiponectin gene expression in the presence of hydrogen peroxide. These results suggest that growth hormone administration ameliorates glucose intolerance in obese mice presumably by decreasing adipose mass, oxidative stress, and chronic inflammation in the visceral fat.
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Affiliation(s)
- M Fukushima
- Department of Bioregulation, Nippon Medical School, Kawasaki, Kanagawa, Japan
| | - Y Okamoto
- Department of Bioregulation, Nippon Medical School, Kawasaki, Kanagawa, Japan
| | - H Katsumata
- Department of Bioregulation, Nippon Medical School, Kawasaki, Kanagawa, Japan
| | - M Ishikawa
- Division of Endocrinology, Diabetology and Atherosclerosis Medicine, Nippon Medical School Musashi-kosugi Hospital, Kawasaki, Kanagawa, Japan
| | - S Ishii
- Department of Bioregulation, Nippon Medical School, Kawasaki, Kanagawa, Japan
| | - M Okamoto
- Department of Bioregulation, Nippon Medical School, Kawasaki, Kanagawa, Japan
| | - S Minami
- Department of Bioregulation, Nippon Medical School, Kawasaki, Kanagawa, Japan
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Katsumata H, Sakai T, Suzuki T, Kaneco S. Highly Efficient Photocatalytic Activity of g-C3N4/Ag3PO4 Hybrid Photocatalysts through Z-Scheme Photocatalytic Mechanism under Visible Light. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5012036] [Citation(s) in RCA: 335] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hideyuki Katsumata
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Tsubasa Sakai
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
| | - Tohru Suzuki
- Environmental
Preservation Center, Mie University, Tsu, Mie 514-8507, Japan
| | - Satoshi Kaneco
- Department
of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
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Katsumata H, Inoue K, Suzuki T, Kaneco S. Facile Synthesis of WO3 Nanorod Thin Films on W Substrate with Enhanced Photocatalytic Performance. Catal Letters 2014. [DOI: 10.1007/s10562-014-1194-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abstract
WO3/g-C3N4 catalysts exhibit excellent photocatalytic performance for H2 production from aqueous solution through the Z-scheme mechanism, which results in the efficient charge separation.
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Affiliation(s)
- Hideyuki Katsumata
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu, Japan
| | - Yusuke Tachi
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu, Japan
| | - Tohru Suzuki
- Environmental Preservation Center
- Mie University
- Tsu, Japan
| | - Satoshi Kaneco
- Department of Chemistry for Materials
- Graduate School of Engineering
- Mie University
- Tsu, Japan
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45
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Gomathisankar P, Hachisuka K, Katsumata H, Suzuki T, Funasaka K, Kaneco S. Photocatalytic hydrogen production from aqueous Na2SO3 + Na2S solution with B/CuO/ZnO under visible light irradiation. RSC Adv 2013. [DOI: 10.1039/c3ra42525h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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46
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Kaneco S, Kitanaga H, Katsumata H, Suzuki T. Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic absorption spectrometry with a tungsten tube atomizer. Front Chem Sci Eng 2012. [DOI: 10.1007/s11705-012-1219-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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Sawada M, Katsumata H, Tomokuni Y, Uekusa S. Structural and electrical properties of Co-doped β-FeSi2 thin films prepared by RF magnetron sputtering. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.phpro.2012.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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Yamada H, Katsumata H, Yuasa D, Uekusa S, Ishiyama M, Souma H, Azumaya I. Structural and electrical properties of β-FeSi2 bulk materials for thermoelectric applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.phpro.2012.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Yatsuyanagi E, Katsumata H, Kikuchi K, Matsuyama S. [Newly developed method of computed tomography scanning to obtain three-dimensional graphics for supporting pulmonary resection]. Kyobu Geka 2011; 64:532-536. [PMID: 21766700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To acquire the pulmonary artery (PA) and pulmonary vein (PV) image separately, we scanned PA phase while X-ray source moved caudal direction, followed by continuous scan of PV phase by moving back reverse direction. We assessed some scanning conditions to shorten scanning time and determined the starting time for scanning to obtain the maximum intensity difference of radio-opaque contrast between PA and PV phase. Additional infusion of normal saline was followed after contrast medium administration. Finally, scanning could be finished almost 10 seconds with only 20 ml contrast medium for establish three-dimensional (3D) images of pulmonary vessels, and the residual contrast medium could be used for consecutive usual preoperative computed tomography (CT). Twenty-three patients who underwent lung resection were assessed their preoperative 3D-CT images using 5-point scale; 5 and 4 as good, 3 as fair, 2 and 1 as poor. As a result, 18 (78.3%) and 1 (4.3%) were categorized as good and poor, respectively. We successfully decreased the frequency of CT and contrast agent dose for 3D-CT in patients being scheduled for lung resection by the new methods reported herein. Additionally, the workload of building up 3D-CT images by medical workers was also reduced.
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Affiliation(s)
- E Yatsuyanagi
- Department of Chest Surgery, Obihiro Hospital, Obihiro, Japan
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Katsumata H, Okada T, Kaneco S, Suzuki T, Ohta K. Degradation of fenitrothion by ultrasound/ferrioxalate/UV system. Ultrason Sonochem 2010; 17:200-206. [PMID: 19592289 DOI: 10.1016/j.ultsonch.2009.06.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2009] [Revised: 06/08/2009] [Accepted: 06/12/2009] [Indexed: 05/28/2023]
Abstract
The sonochemical photodegradation of fenitrothion, which is one of phosphorothiate insecticides, was carried out in the presence of Fe(III) and oxalate. The degradation rate was strongly influenced by initial concentrations of Fe(III) and oxalate. An initial fenitrothion concentration of 10 mg L(-1) was completely degraded after 30 min at pH 6 under the optimum conditions. Therefore, the photo-Fenton reaction combined with sonication in the presence of oxalate was available around neutral pH. The decrease of TOC as a result of mineralization of fenitrothion was observed during ultrasound (US)/ferrioxalate/UV process. In addition, the formations of nitrite and sulfate ions as end-products were observed during this degradation system. The decomposition of fenitrothion gave two kinds of intermediate products. The degradation mechanism of fenitrothion was proposed on the base of the evidence of the identified intermediates. Based on these results, US/ferrioxalate/UV system could be useful technology for the treatment of wastewater containing fenitrothion.
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Affiliation(s)
- Hideyuki Katsumata
- Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan.
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