• Bulletin of the Korean Chemical Society
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• 제31권7호
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• pp.1941-1944
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• 2010

The heterojunction structures of BiOCl/$Bi_3O_4Cl$, exhibiting considerable visible-light photocatalytic efficiency, were prepared by a simple wet-chemical process at ambient condition. The prepared nanocomposites were characterized by XRD, TEM, and UV-visible diffuse reflectance spectra. Under visible light (${\lambda}\geq$420 nm) irradiation, BiOCl/$Bi_3O_4Cl$ exhibited an enhanced photocatalytic activity in decomposing 2-propanol (IP) in gas phase and salicylic acid (SA) in aqueous solution, whereas the bare BiOCl and $Bi_3O_4Cl$ showed negligible activities. It is deduced that the remarkable visible-light photocatalytic activity of the BiOCl/$Bi_3O_4Cl$ originates from the hole $(h^+)$ transfer between VB of the $Bi_3O_4Cl$ and BiOCl semiconductors.

• 한국세라믹학회지
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• 제24권4호
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• pp.397-403
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• 1987

Pb(Zr0.52Ti0.48)O3 powders were prepared by hydrothermal synthesis. Using soluble salts such as Pb(NO3)2, TiCl4 and ZrOCl2$.$8H2O and oxide such as PbO and TiO2 as starting materials, PZT powder was hydrothermally synthesized at the temperature range between 150$^{\circ}C$ and 200$^{\circ}C$. The result showed that reactivity by alkali was decreased in the sequence of Pb(NO3)2, TiCl4, ZrOCl2, PbO, TiO2 and ZrO2. Using the first three soluble salts, PZT powder was synthesiged at 150$^{\circ}C$ for 1hr. In PbO-TiCl4-ZrOCl2 system, PZT powder was synthesized at 150$^{\circ}C$ for 8rs. In Pb(NO3)2-TiO2-ZrOCl2 system, PZT powder was synthesized at 150$^{\circ}C$ for 16hrs, in PbO-TiO2-ZrOCl2 system, the powder was synthesized at 200$^{\circ}C$ for 8hrs.

• 대한화학회지
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• 제26권3호
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• pp.155-159
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• 1982

Trien$H_4(MoOCl_5)_2,\;(MoOCl_3)_2$(trien) 및 $Mo_2O_4Cl_2$(trien)등의 몰리브덴(V)의 트리에틸렌 테트라아민착물을 합성하고 이들 착물의 화학적, 자기적 및 분광학적 성질을 조사하였다. Trien$H_4(MoOCl_5)_2$는 파란색 결정으로 무수에탄올에서 탈염화수소시켜 비전해질인 상자성착물 $H_4(MoOCl_5)_2$(trien)을 얻고 또한 $H_4(MoOCl_5)_2$Trien를 가수분해시켜 갈색의 비전해질인 반자성착물$Mo-2O_4Cl_2$(trien)을 얻었다.

• 대한화학회지
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• 제26권6호
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• pp.378-382
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• 1982

옥소클로로몰리브덴(Ⅴ)산 치환피리딘늄의 초록색결정은 몰리브덴(V)-티오시안산 추출용액의 진한 염산용액에서 얻었다. $MoOCl_3(X-py)_2$(X-py는 4-시아노피리딘, 3-시아노피리딘, 2-아미노-4-피코린 및 4-아세틸피리딘)은 무수알코올에서 ($X-pyH_2$)[$MoOCl_5$]$H_2$O을 환류시켜 염화수소를 날려보낸 다음 얻었다. $MoO^{3+}$를 가지는 (X-pyH)$_2$[MoOCl]$_5$$H_2$O는 물에 용해되어 가수분해되나 MoOCl$_3$(X-py)$_2$는 알코올 및 아세톤등에 녹지 않았다. (X-pyH)$_2$[MoOCl]$_5$$H_2$O는 상자성의 전해질이나 MoOCl$_3$(X-py)$_2$는 상자성의 비전해질 착물임을 알았다.

• 한국세라믹학회지
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• 제35권11호
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• pp.1212-1221
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• 1998

• Elastomers and Composites
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• 제52권1호
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• pp.9-16
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• 2017

Graphene-$BiOCl/Fe_3O_4$ nanocomposites were synthesized from $BiOCl/Fe_3O_4$ and graphene in an electric furnace operating at $700^{\circ}C$ for 12 h. The nanocomposite surface morphology and crystal structure were characterized by scanning electron microscopy and X-ray diffraction. The produced graphene-$BiOCl/Fe_3O_4$ nanocomposites acted as efficient heterogeneous photocatalysts for the degradation of organic dyes, as confirmed by UV-vis spectrophotometry.

• Restorative Dentistry and Endodontics
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• 제15권1호
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• pp.187-200
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• 1990

The purpose of this study was to investigate antimicrobial effect of several irrigation solutions on 7 anaerobes and 2 aerobes, which are found frequently in infected root canals. The antimicrobial effects of normal saline, 3% $H_2O_2$, 0.5% & 3.5% NaOCl, 10% & 50% citric acid and mixed solutions of 3% $H_2O_2$ plus 3.5% NaOCl were compared. No. 80 paper points dipped in bacterial broth were soaked in each irrigation solutions and moved into thioglycolate broth, subcultured in agar plate for bacterial growth. The results were as follows: 1. Normal saline had no antimicrobial effect. 2. Mixed solutions of 3% $H_2O_2$ plus 3.5% NaOCl, 10% citric acid had relatively weak antimicrobial effect. 3.3% $H_2O_2$, 50% citric acid, 0.5% NaOCl showed relatively strong antimicrobial effect. 4. 3.5% NaOCl had the strongest antimicrobial effect among used 7 irrigation solutions.

• Journal of Magnetics
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• 제21권2호
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• pp.179-182
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• 2016

In this paper, 10 nm $Fe_3O_4$ nanoparticles were modified on the surface of $2{\mu}m$ flower-like bismuth oxychloride (BiOCl) spheres by a facile co-precipitation method. The results showed that the $Fe_3O_4/BiOCl$ nanocomposites exhibited excellent photocatalytic activity and superparamagnetic property ($M_s=3.22emu/g$) under visible light for Rhodamine B (RhB) degradation. Moreover, the $Fe_3O_4-BiOCl$ photocatalyst possessed magnetic recyclable property, which could maintain high photocatalytic effective even after 20 cycle times. These characteristic indicates a promising application for wastewater treatment.

• 한국세라믹학회지
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• 제32권7호
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• pp.853-857
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• 1995

ZrSiO4 powders were prepared from partially hydrolyzed solution of Si(OC2H5)4 and ZrOCl2.8H2O solution by the sol-gel method and formation rate of ZrSiO4 on the reaction parameter was investigated. In order to prepare homogeneous ZrSiO4 precursor gels, the H2O/Si(OC2H5)4 molar ratio of about 2, the pH of the ZrOCl2.8H2O solution fo about 4 and stirring time of the mixed solutions of about 2 hrs were appropriate. Formation of temperature of ZrSiO4 reduced about 15$0^{\circ}C$ by milling and formation of ZrSiO4 at 1300~135$0^{\circ}C$ showed an accelerative increase through the hedvall effect by silica.

• 원예과학기술지
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• 제33권5호
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• pp.697-704
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• 2015

본 연구는 절화 국화 'Baekma'를 일본으로 선박 수출 시 수송 환경을 분석하였으며, 절화 국화의 선도를 유지하기 위한 최적 전처리제를 구명하고자 하였다. 그 결과 일본으로 절화 국화를 수출시 약 3일~5일이 소요되었으며, 국내 이동, 선박 운송 및 일본 내에서 이동은 저온이 유지되었으나, 일본에서 검역시 상온에 노출되는 것으로 조사되었다. 이는 품질의 손상을 야기하는 것으로 수송 전체 기간동안 저온조건을 유지해야 할 것으로 판단되었다. 또한, 전처리제는 Chrysal RVB, NaOCl 처리구가 절화수명 연장에 효과적이었으며, Chrysal RVB 전처리는 절화 국화가 끝까지 만개하여 화형이 유지되었다. 박테리아 검정 결과 NaOCl, $ClO_2$ 처리구의 박테리아가 검출되지 않아 살균 성분이 세균증식을 막아준 것으로 판단되었다. 그러나 $ClO_2$처리구는 수확 후 초기 생육에 영향을 미치는 것으로 사료되었다. Chrysal RVB 처리 및 NaOCl 처리구의 엽록소 함유량이 가장 높은 것으로 조사되었다.