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수열합성법에 의한 PbMo<sub>1-x</sub>Cr<sub>x</sub>O<sub>4</sub> 산화물의 합성 및 광촉매 활성
송영인,홍성수,Song, Young In,Hong, Seong-Soo 한국공업화학회 2015 공업화학 Vol.26 No.6
Both lead molybdate ($PbMoO_4$) and chromium substituted lead molybdate ($PbMo_{1-x}Cr_xO_4$) were successfully synthesized using a conventional hydrothermal method and characterized by XRD, DRS, Raman, SEM and PL. We also investigated the photocatalytic activity of these materials for the decomposition of rhodamine B under UV-visible irradiation. The XRD and Raman results revealed the successful synthesis of well-crystallized $PbMoO_4$ crystals with the diameter of 51-59 nm, regardless of the addition of chromium ion. The DRS spectra of $PbMo_{1-x}Cr_xO_4$ catalysts showed new intensive absorption bands in the visible region. The $PbMoO_4$ catalysts showed the lowest photocatalytic activity and the activity increased with an increase of chromium substitution amounts under visible irradiation. PL peaks appeared at about 540-580 nm for all catalysts and excitonic PL signals were proportional to the photocatalytic activity for the decomposition of rhodamine B. $PbMoO_4$ 및 $PbMo_{1-x}Cr_xO_4$ 산화물을 수열합성법으로 합성하여 XRD, DRS, Raman, SEM 및 PL 등에 의해 특성분석을 하였고, 자외선 및 가시광 조사 하에서 rhodamine B의 광분해 반응에서의 활성을 조사하였다. XRD 및 Raman의 분석 결과로부터 대부분의 촉매들은 크롬이온의 첨가와 무관하게 잘 결정화된 $PbMoO_4$ 구조를 가지고 있었으며 51에서 59 nm의 크기를 나타내었다. $PbMo_{1-x}Cr_xO_4$ 산화물의 DRS 곡선은 가시광 영역으로 강한 흡수선을 나타내었다. $PbMoO_4$ 산화물은 가시광 조사 하에서 낮은 광촉매 활성을 나타내었으나 크롬이온의 첨가량이 증가할수록 활성이 증가하였다. 모든 촉매들은 540-580 nm 부근에서 강하고 넓은 PL 흡수밴드가 나타났으며, 이 피크의 세기가 커질수록 광분해 활성이 증가하는 것으로 나타났다.
송영인 평화문제연구소 2003 統一問題硏究 Vol.15 No.1
This paper seeks to compare and identify the future direction of policies toward women in South and North Korea from a women-centered perspective. This paper also intends to review the status and problem areas of policies currently implemented by the South and North Korean governments, and to identify specific tasks that such policies have failed to properly address, with regard to both gender equality and adequate policy outcomes. This analysis suggests that the experiences of women in South Korea and North Korea are similar, based on the fact that both groups experience discrimination based on their gender in the realms of family, education, labor participation, and other social and political activities. This paper will examine the basic purposes of policies toward women and the varying policy-shaping processes in both a liberal democratic system and a socialist system. The thrust of North Korean policies toward women was mainly based on the mobilization of women to achieve the systemic purposes of the proletarian dictatorship and the national economic order enforced by the government. The social, political and labor power of women was viewed as a necessity during the early stages of establishment of socialist political power and control. The task ahead facing a reunified Korea is to establish and enable policies that are shaped from a women-centered perspective. If policies toward women continue to fail to effect practical systemic social and cultural changes under the current governmental agenda, then it is evident that the challenges facing women in a newly unified Korea will only multiply. Both Koreas have deeply entrenched patriarchal influences, and as a result, sexual discrimination remains pervasive. The unification of the Koreas will present a significant and unprecedented opportunity to effect vast transformations in the political, social and cultural lives of women and society at large. Accordingly, the government should carefully review every aspect of current policies regarding women, for the purpose of strengthening its effectiveness in coming up with solutions to the vast challenges posed by the reunification of the nation. Through such a process, the unified Korea will be in a position to better promote the status of women, rectify the societal gender-based imbalance, remedy the distorted perceptions promoted by traditional patriarchal Korean culture, and ultimately develop the unified Korea into a world-class state based on gender equality.