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Van Dao, Dung,Nguyen, Thuy T.D.,Song, Hyeon-Yong,Yang, Jin-Kyu,Kim, Tae-Won,Yu, Yeon-Tae,Lee, In-Hwan Elsevier 2018 Materials & Design Vol.159 No.-
<P><B>Abstract</B></P> <P>As a good stabilizer, [BMIM]BF<SUB>4</SUB> ionic liquid (IL) has been successfully utilized to assist preparation of Ag nanoparticles (NPs) decorated on CeO<SUB>2</SUB> supports. The obtained IL-stabilized Ag-CeO<SUB>2</SUB> nanocomposite showed better photocatalytic degradation activity (92%) of Auramine O (AO) dye as compared with pure CeO<SUB>2</SUB> (35%) NPs and IL-free Ag-CeO<SUB>2</SUB> (65%) nanocomposite after 90 min of visible light irradiation. The improvement could be attributable to small size (5 nm) of IL-stabilized Ag NPs loaded on the surface of CeO<SUB>2</SUB> supports and the large surface area of its nanocomposite (11.11 m<SUP>2</SUP>/g). These increase in the interfacial contact areas between IL-stabilized Ag NPs and CeO<SUB>2</SUB> supports that enhance the charge transfer and reduce the recombination of the photogenerated electron-hole pairs. Further, the IL-stabilized Ag-CeO<SUB>2</SUB> nanocomposite showed good photocatalytic stability for dye degradation. The persuasible mechanism of enhanced photocatalytic degradation of AO was clearly discussed on the basis of localized surface plasmon resonance (LSPR) effect of Ag NPs as well. Accordingly, this work can pave new pathway to prepare nanoparticles coated on metal oxide nanostructures for the practical applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> [BMIM]BF<SUB>4</SUB> ionic liquid (IL) has been used to assist synthesis of small Ag NPs decorated on CeO<SUB>2</SUB> supports. </LI> <LI> IL-stabilized Ag-CeO<SUB>2</SUB> showed superior photocatalytic activity of 92 % for auramine O degradation under visible light. </LI> <LI> Enhanced photocatalytic activity was attributed to the localized surface plasmon resonance of small IL-stabilized Ag NPs. </LI> <LI> IL-stabilized Ag-CeO<SUB>2</SUB> nanocomposite was effective for the treatment of waste water containing organic dyes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Van Nguyen Tuan,Do Ha Huu,Tekalgne Mahider,Van Le Quyet,Nguyen Thang Phan,Hong Sung Hyun,Cho Jin Hyuk,Van Dao Dung,Ahn Sang Hyun,Kim Soo Young 나노기술연구협의회 2021 Nano Convergence Vol.8 No.33
Following publication of the original article [1], the affiliation of the authors was incorrectly published in the article. The affiliation which was shown in supplementary information is correct. This has been corrected with this erratum.
Dung Van Dao,Thuy T.D. Nguyen,김동석,윤지욱,유연태,이인환 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.95 No.-
Developing efficient and stable hydrogen gas sensors may be of urgent demand for its safety uses. Herein,Pd@N-CeO2 core–shell nanoflatforms (CSNFs) are fabricated and utilized for this purpose. The resultingPd@N-CeO2 CSNFs offer small particle sizes with high Brunauer–Emmett–Teller (BET) surface area andporous nanostructures. The core–shell sensors establish high hydrogen sensing response and fastresponse and recovery times at a lower optimal working temperature compared to undoped and dopedCeO2 ones. In addition, it further demonstrates high selectivity and stability toward hydrogen gas amonginterfering different target gases. The hydrogen gas sensing betterment is synergistically assigned to Pdcore, N dopant, and high BET surface area effects, which decidedly modulate the electrical resistance ofcore–shell sensors to improve overall gas sensing performance accordingly. Ourfinding provides anefficient way to design and fabricate versatile hydrogen gas sensors based on metal@nitrogen dopedsemiconductoroxide core–shell nanostructures.
WS2–WC–WO3 nano-hollow spheres as an efficient and durable catalyst for hydrogen evolution reaction
Van Nguyen Tuan,Do Ha Huu,Tekalgne Mahider,Van Le Quyet,Nguyen Thang Phan,Hong Sung Hyun,Cho Jin Hyuk,Van Dao Dung,Ahn Sang Hyun,Kim Soo Young 나노기술연구협의회 2021 Nano Convergence Vol.8 No.28
Transition metal dichalcogenides (TMDs), transition metal carbides (TMCs), and transition metal oxides (TMOs) have been widely investigated for electrocatalytic applications owing to their abundant active sites, high stability, good conductivity, and various other fascinating properties. Therefore, the synthesis of composites of TMDs, TMCs, and TMOs is a new avenue for the preparation of efficient electrocatalysts. Herein, we propose a novel low-cost and facile method to prepare TMD–TMC–TMO nano-hollow spheres (WS 2 –WC–WO 3 NH) as an efficient catalyst for the hydrogen evolution reaction (HER). The crystallinity, morphology, chemical bonding, and composition of the composite material were comprehensively investigated using X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, and X-ray photoelectron spectroscopy. The results confirmed the successful synthesis of the WS 2 –WC–WO 3 NH spheres. Interestingly, the presence of nitrogen significantly enhanced the electrical conductivity of the hybrid material, facilitating electron transfer during the catalytic process. As a result, the WS 2 –WC–WO 3 NH hybrid exhibited better HER performance than the pure WS 2 nanoflowers, which can be attributed to the synergistic effect of the W–S, W–C, and W–O bonding in the composite. Remarkably, the Tafel slope of the WS 2 –WC–WO 3 NH spheres was 59 mV dec −1 , which is significantly lower than that of the pure WS 2 NFs (82 mV dec −1 ). The results also confirmed the unprecedented stability and superior electrocatalytic performance of the WS 2 –WC–WO 3 NH spheres toward the HER, which opens new avenues for the preparation of low-cost and highly effective materials for energy conversion and storage applications.
Urinary incontinence after COVID-19 vaccination: a case study in an 8-year-old boy
Dao Thi Loi,Nguyen Trung Kien,Nguyen Xuan Bai,Le Kieu Dung,Duong Khanh Linh,Bui Duc Manh,Nguyen Le Cam Anh,Hoang Van Thuan 대한백신학회 2024 Clinical and Experimental Vaccine Research Vol.13 No.3
There have been many studies on the adverse effects of coronavirus disease 2019 (COVID-19) vaccines but the urinary incontinence after COVID-19 vaccination is rare. Here, we report an 8-year-old boy presented to outpatient department, Thai Binh University of Medicine Hospital, Thai Binh, Vietnam with complaints of urinary incontinence for the past 2 weeks, following the first dose of the messenger RNA vaccine. He had no other abnormalities in clinical and laboratory exams. This clinical situation suggested vaccine side effects. No specific treatment was administered upon diagnosis without toilet and bladder training. Subsequent monitoring revealed a gradual reduction in symptoms over 2 months, with complete recovery achieved at the 14th week from the onset of symptoms, without necessitating any medical intervention. This case highlights the need for thorough evaluation and assessment of potential adverse effects following vaccination, including uncommon presentations.
Mortality following transarterial embolization due to hemorrhage after liver venous deprivation
Thanh Dung Le,Van Sy Than,Minh Duc Nguyen,Hoai Linh Vu,Xuan Hai Dao,Hong Son Trinh 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.2
Liver venous deprivation (LVD) is considered to be a safe and effective method that induces more rapid and important liver hypertrophy before major hepatectomy in comparison with portal vein embolization (PVE) alone. Bleeding complications after LVD or PVE are rare, but can be a life-threatening event. Herein, we report a case of perihepatic and extended subcapsular hematoma of the liver after LVD. Transarterial embolization was performed using gelfoam to control the hemorrhage; however, the patient developed irreversible liver failure and passed away after 38 days of treatment. In patients with LVD or PVE, severe post-procedural bleeding poses a substantial challenge for treatment. Arterial embolization should be carefully considered to avoid liver failure and even death, regardless of whether temporary embolization is used.
Mortality following transarterial embolization due to hemorrhage after liver venous deprivation
Thanh Dung Le,Van Sy Than,Minh Duc Nguyen,Hoai Linh Vu,Xuan Hai Dao,Hong Son Trinh 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.2
Liver venous deprivation (LVD) is considered to be a safe and effective method that induces more rapid and important liver hypertrophy before major hepatectomy in comparison with portal vein embolization (PVE) alone. Bleeding complications after LVD or PVE are rare, but can be a life-threatening event. Herein, we report a case of perihepatic and extended subcapsular hematoma of the liver after LVD. Transarterial embolization was performed using gelfoam to control the hemorrhage; however, the patient developed irreversible liver failure and passed away after 38 days of treatment. In patients with LVD or PVE, severe post-procedural bleeding poses a substantial challenge for treatment. Arterial embolization should be carefully considered to avoid liver failure and even death, regardless of whether temporary embolization is used.