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RISS 인기검색어
- 검색키워드
- 저자 : Hu Hanmei (검색결과 3 건)
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Hanmei Hu,Xinqing Ge,Qiang Zheng,Chonghai Deng 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.11
Novel perpendicularly cross-rectangular CuO architectures have been successfully fabricated on a large scale by a facile microwave-assisted chemical aqueous route. The as-synthesized CuO products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), high resolution transmission electron microscopy (HRTEM) and UV-vis absorption spectroscopy. An individual CuO microstructure is mainly assembled by two rectangle-shaped nanosheets with different sizes, which is perpendicularly intersected through the center. A possible formation mechanism of perpendicularly cross-rectangular CuO architectures was proposed based on the comparative experimental results. The prepared CuO nanoarchitectures exhibited excellent photocatalytic activity for the decolorization of Rhodamine B (RhB) under visible light irradiation. Simultaneously, the prepared CuO products, acting as an additive, also showed effective catalytic activity on the thermal decomposition of ammonium perchlorate (NH4ClO4).
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Hu Hanmei,Ding Kangzhe,Yu Hong,He Yunyun,Yang Mingdi,오원춘 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.2
Novel metastable h-WO3 nano-hemitubes have been controllably prepared on a large scale assisted by inorganic structure directing agent of (NH4)2C2O4 through a convenient and facile hydrothermal route. The chemical composition, morphology, crystal structure, surface area and optical property of as-obtained products were investigated using various characterization techniques. Interestingly, it was found that the introduction and the adding amount of (NH4)2C2O4 played an important role in the process of controlling the phase and morphology of WO3. An appropriate amount of (NH4)2C2O4 (10–14 mmol) was beneficial for inducing the formation of metastable h-WO3 nano-hemitubes. However, monoclinic m-WO3 square-shaped nanoplates were obtained by adding 2 mmol (NH4)2C2O4. The results of photoluminescence (PL) test demonstrated that h-WO3 nano-hemitubes has a lower recombination rate of photogenerated electron–hole pairs and a longer lifetime of photogenerated carriers. Due to the special structure, the prepared one-dimensional h-WO3 nano-hemitubes displayed very superior adsorption–photocatalysis–oxidation activity for removing MB from highly concentrated MB-containing wastewater, which was 6.1 times higher than that of two-dimensional monoclinic m-WO3 square-shaped nanoplates. The mechanism of adsorption–photocatalysis–oxidation degradation for MB on h-WO3 nano-hemitubes was simply proposed. The prepared h-WO3 nano-hemitubes may have a potential application in wastewater purification and environmental remediation.
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Xiangge Zhang,Lanjie Zheng,Haojun Zhang,Xinrong Huang,Yinghong Liu,Junjie Zhang,Yu-Feng Hu,Hanmei Liu,Guowu Yu,Yangping Li,Yubi Huang 한국식물학회 2019 Journal of Plant Biology Vol.62 No.3
Plant shoot and root growth is regulated by multiplefactors, including the hormone auxin. A maize brachytic2(br2) mutant displays a shortened shoot and root with highauxin concentration in their apexes, where BR2 encodes anauxin transporter P-glycoprotein1 (PGP1). We employedcomparative transcriptome sequencing to explore the BR2/PGP1-mediated patterns for shoot and root growth amongbr2, wild type (WT), and hybrid F1 (br2 × WT). The resultsshow 352 genes in the br2 shoot and 234 genes in the br2root are differentially expressed compared to WT and F1. Zm00001d045203 and Zm00001d031562 were identified astwo auxin-responsive genes in both the shoot and root. TheZm00001d045203 gene is down-regulated in br2 and encodesan Aux/IAA inhibitor involved in the SCFTIR1/AFB-mediatedauxin signaling pathway. The up-regulated Zm00001d031562gene encodes a small GTPase belonging to the Rab/Yptfamily, which takes part in auxin-mediated responses inArabidopsis. Cytology analysis reveals that reduced cellelongation affects the shoot and root growth of br2. TheZm00001d043477 gene is down-regulated and encodes amember of the cellulose synthase protein family, possiblyreducing cell elongation in the br2 shoot and root. Theseresults reveal the specific regulation of auxin actions and cellresponses by BR2/PGP1.
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