光触媒の話に注目すると、現在光触媒として応用されている酸化チタンのバン

光触媒の話に注目すると、現在光触媒として応用されている酸化チタンのバンドギャップが、3.2 eVと吸収を紫外光域にしか持たないため太陽光を効率的に利用することができないという問題がある[1.3]。太陽光のスペクトルから判断すると酸化チタンは太陽光の約5％しか利用できていないことになる。この問題の解決方法の一つとして酸窒化物が提案されており、実際、いくつかの酸窒化物が可視光応答型の光触媒能を示すことが知られている[1.4][1.5]。
窒素の効果はバンドギャップだけではなく、屈折率にも現れる。一般に酸窒化物は酸化物よりも大きい屈折率を示す。これも、窒素の電気陰性度が酸素よりも小さいことに由来する。一般に、屈折率(n)は、式(1-1)のLorenz-Lorentzの式のように分極率(α)が大きいほど大きくなる[1.6]。そしてその、分極率は結合のイオン性(rσ)の大きさによって式(1-2)のように決まる[1.7]。係数はそれぞれ、M=, vA：原子擬ポテンシャル, NA：アボガドロ定数, W: 分子量, ρ: 密度となっている。

結果 (英語) 1:

3.2 eV band gap to look at the story of Photocatalyst applied as a now-photocatalytic titanium oxide and is able to efficiently using solar absorption purple light area but do not have a problem [1.3]. Judging from the spectrum of sunlight and titanium dioxide become not available only about 5% of solar. Oxynitride have been proposed as a resolution for this issue, in fact, oxynitrides of some visible light responsive photocatalytic activity is known [1.4], [1.5].Effect of nitrogen as the band gap, not appearing in the refractive index. In General show refractive index greater than the oxide oxynitrides. As far as the electronegativity of oxygen is less than that derived from. In General, higher polarization ratio (α) Lorenz-Lorentz EQ. (1-1) expression in refractive index (n) is greater [1.6]. Ionic bond (r) σ = size depends on expression (1-2) to its polarizability and [1.7]. Each coefficient is M = < 0 | e2r2 | > 0, vA: Atomic pseudopotential, NA: Avogadro constant, W: molecular weight, ρ: density has been.

結果 (英語) 2:

Focusing on the story of the photocatalyst, the band gap of the titanium oxide that are currently applied as a photocatalyst, there is a problem that it is not possible to use the solar light efficiently because with only the ultraviolet light region and absorption 3.2 eV [ 13]. Titanium oxide to be judged from the spectrum of sunlight and thus not available only about 5% of sunlight. Oxynitride As one solution to this problem have been proposed, in fact, some of the oxynitride are known to exhibit a photocatalytic activity in the visible light responsive type [1.4] [1.5].
The effect of nitrogen is not only the band-gap, also appears in the refractive index. Generally oxynitride shows a refractive index greater than that of the oxide. This is also, electronegativity of nitrogen is derived from a smaller than oxygen. In general, the refractive index (n) is the greater polarizability (α) is greater as in the formula Lorenz-Lorentz equation (1-1) [1.6]. And that, polarizability is determined as equation (1-2) by the size of the binding of the ionic (rσ) [1.7]. Each factor, M = <0 | e2r2 | 0>, vA: atomic pseudopotential, NA: Avogadro constant, W: molecular weight, ρ: has become a density.

結果 (英語) 3:

The story of photocatalyst titanium oxide and the band gap is currently being applied as a photocatalyst, 1.3 have a problem that can not be to have 3.2 eV absorb UV light region effectively utilizing solar light Judging from the solar spectrum and titanium oxide in the light of the sun is about 5 per cent only can not use. As one of the methods of solving the above problems, and proposed the oxynitrideKnown number of oxynitride of visible light response type optical catalyst activity in the USA's 1.5's 1.4 The band gap, as well as the effects of nitrogen on the refractive index. In general, the oxynitride is larger than the index of refraction in the oxide. This is due to that the electronegativity of oxygen and nitrogen is less than. In general, the refractive index (n) in the formula (1), a polarization of Lorenz equation of Lorentz rate. Alpha. - that's good 1.6 increases as the Then, theIonic bond polarizability of σ (R) of the system depend on the size of 1 - (2) is determined as 1.7 I The coefficient of the >, bool E 2 0 0 M R 2: vA atomic pseudopotential, NA: Avogadro constant, W molecular amount by the density ρ,. At