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Kim, Jin Yeong,Jin, Mingshi,Lee, Kyung Joo,Cheon, Jae Yeong,Joo, Sang Hoon,Kim, Ji Man,Moon, Hoi Ri Springer 2012 NANOSCALE RESEARCH LETTERS Vol.7 No.1
<P>The preparation of redox-active metal-organic framework (<I>ra</I>-MOF)-supported Pd nanoparticles (NPs) via the redox couple-driven method is reported, which can yield unprotected metallic NPs at room temperature within 10 min without the use of reducing agents. The Pd@<I>ra</I>-MOF has been exploited as a precursor of an active catalyst for CO oxidation. Under the CO oxidation reaction condition, Pd@<I>ra</I>-MOF is transformed into a PdO<SUB><I>x</I></SUB>-NiO<SUB><I>y</I></SUB>/C nanocomposite to generate catalytically active species <I>in situ</I>, and the resultant nanocatalyst shows sustainable activity through synergistic stabilization.</P>
Lee, Yoon Yun,Moon, Jong Hun,Choi, Yun Seok,Park, Gwi Ok,Jin, Mingshi,Jin, Long Yi,Li, Donghao,Lee, Jin Yong,Son, Seung Uk,Kim, Ji Man American Chemical Society 2017 The Journal of Physical Chemistry Part C Vol.121 No.9
<P>Highly ordered mesoporous CdxZn1-xS materials were obtained via a simple nanoreplication method using a mesoporous silica template with a 3-D bicontinuous cubic Ia3d mesostructure. Combined analyses using X-ray diffraction, N-2 sorption, electron microscopy, and diffuse reflectance UV-visible spectroscopy revealed that the ordered mesoporous ternary compound semiconductor materials exhibited well developed crystalline frameworks, high surface areas of 80120 m(2)g(-1), uniform mesopore sizes of about 20 nm, ordered arrangement of mesopores, and outstanding visible light absorption properties. Photocatalytic activities were investigated by degradation of methylene blue and rhodamine B under visible light over the mesoporous CdxZn1-xS materials. Due to the high surface area and outstanding light absorption properties, the ordered mesoporous CdxZn1-xS exhibited excellent photocatalytic performances for the degradation of methylene bluetand rhodamine B. This study indicates a potential application of the mesoporous compound semiconductors in the efficient visible light-driven photolysis of organics that may cause environmental pollution.</P>
Catalytic properties of highly ordered crystalline nanoporous tungsten oxide in butanol dehydration.
Choi, Hyeonhee,Lee, Eunok,Jin, Mingshi,Park, Young-Kwon,Kim, Ji Man,Jeon, Jong-Ki American Scientific Publishers 2014 Journal of nanoscience and nanotechnology Vol.14 No.11
<P>Highly ordered mesoporous tungsten oxide (meso-WO3) was successfully synthesized using mesoporous silica KIT-6 as a hard template via the nanoreplication method. The physicochemical properties of meso-WO3 were characterized by X-ray diffraction, nitrogen adsorption-desorption, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption of ammonia, and infra-red spectroscopy of adsorbed pyridine. No oxidation state other than WO3 was observed in the meso-WO3 sample. Lewis acid sites were dominant in meso-WO3, which could be confirmed by infra-red spectroscopy of pyridine and temperature-programmed desorption of ammonia. Its catalytic behavior in 2-butanol dehydration was investigated in a fixed bed reactor and compared with that of the WO3/MCM-41 catalyst prepared by the atomic layer deposition method. The meso-WO3 catalyst exhibited higher 2-butanol dehydration activity than that of the WO3/MCM-41 catalyst, which is ascribed to the stronger acidity as well as higher amount of acid sites that are mainly composed of Lewis acid sites in the meso-WO3 catalyst.</P>
Park, Jung-Nam,Shon, Jeong Kuk,Jin, Mingshi,Hwang, Seong Hee,Park, Gwi Ok,Boo, Jin-Hyo,Han, Tae Hee,Kim, Ji Man The Chemical Society of Japan 2010 Chemistry letters Vol.39 No.5
<P>Highly ordered mesoporous α-Mn<SUB>2</SUB>O<SUB>3</SUB> with well-defined mesopores, high surface area, and high oxygen vacancy exhibits excellent catalytic activity toward H<SUB>2</SUB>O<SUB>2</SUB> decomposition at low temperature.</P>
Kang, Narae,Park, Ji Hoon,Jin, Mingshi,Park, Nojin,Lee, Sang Moon,Kim, Hae Jin,Kim, Ji Man,Son, Seung Uk American Chemical Society 2013 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.135 No.51
<P>Hollow microporous organic networks (<B>H-MON</B>s) were prepared by a template method using silica spheres. The shell thickness was delicately controlled by changing the synthetic conditions. The <B>H-MON</B>s were used as a template for the synthesis of nanoparticulate Co<SUB>3</SUB>O<SUB>4</SUB> hollows which showed excellent catalytic performance in H<SUB>2</SUB>O<SUB>2</SUB> oxidation.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2013/jacsat.2013.135.issue-51/ja411263h/production/images/medium/ja-2013-11263h_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja411263h'>ACS Electronic Supporting Info</A></P>
LIZHENGHUA,Heon Jong Jeong,Kumarsrinivasan Sivaranjani,Byung Jin Song,Su Bin Park,Donghao Li,Chul Wee Lee,Mingshi Jin,김지만 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.5
Highly ordered mesoporous tungsten trioxide (WO3) with high surface area (75 m2/g) and well-defined mesopores were successfully prepared through a hard templating method using a meso-porous silica KIT-6 as a template and (NH4)6H2W12O40 · xH2O as a tungsten precursor. Oxidative desulfurization of a model oil with H2O2 as the oxidant was carried out at 50℃ under atmospheric pressure in order to analyze the catalytic activity. The desulfurization reactions were optimized by various kinds of reaction parameters such as H2O2/S molar ratio, reaction temperatures and series of sulfur-containing compounds [dibenzothiophene (DBT), benzothiophene (BT) and 4,6-dimethyl dibenzothiophene (4,6-DMBT)]. Excellent catalytic activity for the removal of the sulfur-containing compounds from the model oil was observed with mesoporous WO3 catalyst, where the activity was maintained during 5 recycle tests without any regeneration process. The high catalytic activity and durability is mainly attributed to well-defined mesopores and high surface area of mesoporous WO3 catalyst.