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ITO 및 n형 TiO₂박막전극에서 Luminol의 전기화학적 발광강도에 관한 연구
金昌鎭,藤嶋昭 大邱大學校附設 基礎科學硏究所 1997 基礎科學硏究 Vol.14 No.1
The electrochemical and photoelectrochemical luminescence intensity of luminol (5-amino-2, 3-dihydro-1, 4-phthalazinedione) in basic solution was measured by anodic electrochemical oxidation on two kinds of electrode(ITO;indium tinoxide and n-type TiO₂ semiconductor thin film electrode). The threshold voltage for the luminescence intensity of luminol on ITO electrode was 0.63V (using Ag/AgCI as reference) and the peak of luminescence intensity was observed at 420nm when anodic potential of 1.2V was applied in the solution of pH 11. Luminescence intensity was strongly enhanced by the addition of lxlO 4mol hydrogenperoxide oxidant. When 0.lmol of hydrogenperoxide was added, almost 150 fold increase in the luminescence intensity was observed. Irradiation of 350nm light on the n type TiO₂ prepared by a spray-pyrolysis method while applying 1.2V of anodic potential resulted in the same degree of luminescence enhancement as on the ITO electrode with 0.lmol of hydrogenperoxide oxidant. This is attributed to the formation of holes which have strong oxidation power. In addition, comparable luminescence intensity was observed when 5.7V of anodic potential was applied under the condition of no irradiation.
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이주성,박정일,등도소 한국화학공학회 1986 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.24 No.6
산성용액중에서 p형 반도체인 인화붕소의 광전기화학적 거동을 연구하였다. p-BP band gap이 2.0eV로 넓은 파장 범위에서 좋은 광응답을 하였으며 광조사시 황산산성용액중에서도 안정하였다. 광조사시 BP광음극으로부터 발생하는 가스는 수소였으며 전류효율은 거의 100%였었다. BP의 표면에 적당히 루테늄을 처리하면 광전류는 현저하게 증가하였다. 이 p-BP를 사용하여 다음과 같은 광전기화학전지 Pt(H₂)/0.5M H₂SO₄/p-BP를 구성시켰더니 이의 특성으로서 open-circuit 광전압은 0.45V였고 short-circuit 광전류 밀도는 2.4mA.㎝^(-2)였으며 fill factor는 약 25%였었다. The photoelectrochemical behavior of p-type boron phosphide(BP) in acidic solution was investigated. The p-BP photocathode had a good wavelength response(E_g =2.0 eV) and was suitable in an stulfuric acid solution under irradiation. The gas evolved from this BP photocathode under irradiation was hydrogen which was produced with a current efficiency of about 100%. The photocurrent was markedly increased by a suitable surface ruthenium treatment of the BP. A photoelectrochemical cell of the form Pt(H₂)/0.5M H₂SO₄/p-BP was shown to have an the open-circuit photovoltage of 0.45V, the short-circuit photocurrent density of 2.4 mA·㎝^(-2), and the fill factor of 25%.
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