• 멤브레인
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• 제22권6호
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• pp.435-440
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• 2012

본 연구에서는 용매열합성법(solvothermal method)을 이용해 나노기공 HKUST-1 분리막을 제조하였다. In-situ 용매열합성법을 이용하는 경우, 매크로 기공의 알루미나 지지체 위에 균일하고 균열이 없는 HKUST-1 층을 형성하기 어렵다. 본 연구에서는 용매열합성 전에 알루미나 지지체의 표면을 가열한 상태에서 용매열합성의 전구체 용액을 분무하므로 연속적이고 균열이 없는 HKUST-1 분리막을 제조할 수 있었다. 합성된 HKUST-1 분리막은 XRD, FE-SEM 및 단일 기체투과 실험 등을 통해 분석하였다.

• 한국세라믹학회:학술대회논문집
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• 한국세라믹학회 2003년도 추계총회 및 연구발표회 초록집
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• pp.48.2-48
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• 2003

• 청정기술
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• 제16권1호
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• pp.46-50
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• 2010

본 연구에서는 새집증후군의 대표적 원인물질인 수중 부유 톨루엔을 효율적으로 분해하기 위해 Sn원소를 티타니아 골격에 삽입하여 고온 고압에서 용매열(solvothermal)법으로 Sn-$TiO_2$ 나노 광촉매를 제조하였다. 제조한 Sn-$TiO_2$의 물리적 특성은 X-ray 회절분석법, 투과전자현미경, 주사전자현미경, 자외선-가시선 분광 광도계를 통하여 분석하였다. Sn-$TiO_2$의 광촉매 활성은 수중 부유 톨루엔 광분해반응을 통해 확인하였고, 반응 전후의 수중 부유 톨루엔 농도는 자외선-가시선 분광광도계를 이용하여 측정하였다. 수중 부유 톨루엔 광분해반응 결과 0.01 mol% Sn-$TiO_2$촉매가 순수 $TiO_2$ (anatase) 광촉매보다 활성이 향상되었으며. 500ppm 수중 부유 톨루엔은 300분 이내에 완전히 분해되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.732-734
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• 2003

A solvothermal synthetic method to $BaTiO_3$ nanoparticle has been investigated in toluene solution with $BaTi(OR)_6$ as precursor. A precursor prepared from barium metal with toluene, isopropanol and titanium isopropoxide was used as a starting material. Weight ratio of precursor to solvent prepared in the mixture are 5/100, 10/100, 20/100 and 50/100wt%. At the weight ratio of 50/100wt%, $BaTiO_3$ butterfly twin crystalline(${\fallingdotseq}100nm$) was obtained after synthesis at $250^{\circ}C$ for 20hrs in an autoclave. X-ray diffraction and transmission electron microscopy showed that the product of 50/100wt% has crystallization. At 5/100, 10/100, and 20/100wt%, however, red colloidal solution was obtained after synthesis and crystalline phase of $BaTiO_3$ was not produced.

• Journal of Ceramic Processing Research
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• 제13권spc1호
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• pp.6-9
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• 2012

Eu3+-doped RE2O3 (RE = Gd, Y and La) phosphors were prepared by solvothermal reaction method and their crystalline structure, phase transformation and surface morphologies were investigated by using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM). The obtained RE2O3:Eu3+ phosphors are nanocrystalline-sized. The luminescence properties of Eu3+ ions in different host materials, namely, Gd2O3, Y2O3 and La2O3 have been investigated. PACS number: 32.50.+d, 78.55.-m, 81.40.Tv.

• Korean Chemical Engineering Research
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• 제52권2호
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• pp.214-218
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• 2014

본 연구에서는 용매열합성법(solvothermal method)을 이용하여 매크로 기공의 알루미나 튜브 지지체 위에 나노기공 $Cu_3(BTC)_2$ 분리막을 제조하였다. In-situ 용매열합성법을 이용하는 경우, 매크로 기공의 알루미나 지지체 위에 균일한 핵생성과 성장을 통해 연속적이고 균열이 없는 $Cu_3(BTC)_2$ 층을 형성하기 어렵다. 본 연구에서는 용매열합성 전에 알루미나 지지체 표면을 $200^{\circ}C$로 가열한 상태에서 Cu 전구체 용액을 분무하여 지지체 표면을 개질한 후, 용매열합성법을 수행하여 연속적이고 균열이 없는 $Cu_3(BTC)_2$ 튜브형 분리막을 제조할 수 있었다. 합성된 $Cu_3(BTC)_2$ 분리막은 XRD, FE-SEM 및 기체투과 실험 등을 통해 분석하였다. $5{\mu}m$의 두께를 가진 $Cu_3(BTC)_2$ 튜브형 분리막을 통한 단일기체 투과실험 결과, $80^{\circ}C$에서 $H_2$가 가지는 투과도는 $7.8{\times}10^{-7}mol/s{\cdot}m^2{\cdot}Pa$이고, $H_2/N_2$, $H_2/CO_2$의 이상선택도는 각각 11.94, 12.82로 계산되었다.

• Bulletin of the Korean Chemical Society
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• 제32권9호
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• pp.3317-3322
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• 2011

This study examines the photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs) when nanometer-sized Zr (0.1, 0.5, and 1.0 mol %)-$TiO_2$ prepared using a solvothermal method is utilized as the working electrode material. The particle sizes observe in the transmission electron microscopy (TEM) images are < 30 nm in all samples. The absorption band is slightly broadened at the tail for the 0.1 mol % Zr-$TiO_2$, and the intensity of the photoluminescence (PL) curves of the Zr-incorporated $TiO_2$ is significantly smaller than that of the pure $TiO_2$. Compared to that using pure $TiO_2$, the energy conversion efficiency is enhanced considerably by the application of Zr-$TiO_2$ in the DSSCs to approximately 6.17% for 0.5 mol % Zr-$TiO_2$ with the N719 dye (10.0 ${\mu}m$ film thickness and 5.0 mm ${\times}$ 5.0 mm cell area) under 100 mW/$cm^2$ of simulated sunlight.

• Advances in nano research
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• 제2권3호
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• pp.147-155
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• 2014

Among the various nanoparticles reported for commercial applications, considerable interest has been generated by the use of silver nanoparticles. Owning to extremely small size, silver nanoparticles exhibit enhanced properties when compared with the bulk material. In this research work, silver nanoparticles were prepared by the reduction of silver salt with a reducing agent by a solvothermal method using different solvent mediums such as ethanol, hexane, toluene and acetone with water. The prepared silver nanoparticles were characterized systematically by X-ray diffraction (XRD), particle size analysis and scanning electron microscope (SEM). The results revealed the formation of pure silver phase and nano-sized particles. Among the different solvent mediums used, the silver nanoparticles prepared by hexane and water as solvent mixture resulted in very low particle size.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.124-125
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• 2006

Multilayer ceramic capacitor (MLCC) miniaturization has increased the demand for superfine $BaTiO_3$ powder due to its thin dielectric layer. Hydrothermally synthesized $BaTiO_3$ powder a pseudo-cubic phase resulting in poor dielectric properties due to size effect and hydroxyl ion inclusion in the $BaTiO_3$ lattice. We attempted a superfine (lower than 100 nm) highly tetragonal $BaTiO_3$ powder via a solvothermal method without precipitating agent. The lattice parameters and the relative amounts of tetragonal and cubic phases were determined using Rietveld refinement.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1590-1592
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• 2007

In this study, we prepared CNF (carbon nanofiber) by the solvothermal method for FED (field emission display) applications. We controlled several conditions to synthesize effective CNF for field emission applications. Nano-sizesd Pt nanoparticles were coated on the CNF. In this study, we have applied Pt nanoparticles- coated CNF which can be produced in mass, to field emission application.