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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.
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.
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.
Right lumbar lymph trunk injury after right laparoscopic donor nephrectomy: a case report
Le Thanh Dung,Le Nguyen Vu,Than Van Sy,Tran Ha Phuong,Ninh Viet Khai,Dao Xuan Hai,Nguyen Quang Nghia 대한이식학회 2023 Korean Journal of Transplantation Vol.37 No.2
Laparoscopic donor nephrectomy (LDN) is increasingly popular because of its advantages over open surgery. Chyle leak after donor nephrectomy is a rare but potentially lethal complication if not treated appropriately. We describe a case of a 43-year-old female patient with no remarkable history who presented a chyle leak on day 2 after right transperitoneal LDN. Since conservative treatment failed, the patient underwent magnetic resonance imaging (MRI) and intranodal lipiodol lymphangiography, which confirmed the chyle leak from the right lumbar lymph trunk into the right renal fossa. The chyle leak was percutaneously embolized twice, on postoperative day (POD) 5 and POD 10, by a mixture of N-butyl-2-cyanoacrylate and lipiodol. The drainage fluid decreased significantly after the second embolization. The subhepatic drainage tube was withdrawn on POD 14, and the patient was discharged on POD 17. MRI lymphangiography and intranodal lipiodol lymphangiography effectively identified the chyle leak point. Percutaneous embolization seems to be a safe, effective method for treating high-output chyle leaks.
A Comparative Study of Gas Sensing Properties of Au-loaded ZnO and Au@ZnO Core-shell Nanoparticles
Sanjit Manohar Majhi,Dung Van Dao,Hu-Jun Lee,유연태 한국센서학회 2018 센서학회지 Vol.27 No.2
Au@ZnO core-shell nanoparticles (NPs) were prepared by a simple method followed by heat-treatment for gas sensor applications. The advantage of the core-shell morphology was investigated by comparing the gas sensing performances of Au@ZnO core-shell NPs with pure ZnO NPs and different wt% of Au-loaded ZnO NPs. The crystal structures, shapes, sizes, and morphologies of all sensingmaterials were characterized by XRD, TEM, and HAADF-STEM. Au@ZnO core-shell NPs were nearly spherical in shape and Au NPswere encapsulated in the center with a 40–45 nm ZnO shell outside. The gas sensing operating temperature for Au@ZnO core-shellNPs was 300°C, whereas it was 350°C for pure ZnO NPs and Au-loaded ZnO NPs. The maximum response of Au@ZnO core-shell NPs to 1000 ppm CO at 300°C was 77.3, which was three-fold higher than that of 2 wt% Au-loaded ZnO NPs. Electronic and chemicaleffects were the primary reasons for the improved sensitivity of Au@ZnO core-shell NPs. It was confirmed that Au@ZnO core-shellNPs had better sensitivity and stability than Au-loaded ZnO NPs.