Bi(2) WO(6) inverse opals: facile fabrication and efficient visible-light-driven photocatalytic and photoelectrochemical water-splitting activity.
Bi(2) WO(6) inverse opals: facile fabrication and efficient visible-light-driven photocatalytic and photoelectrochemical water-splitting activity.
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DOI：
10.1002/smll.201101152
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发表时间：
2011-10
期刊：
影响因子：
13.3
通讯作者：
Liwu Zhang;Clarissa Baumanis;L. Robben;Tarek A. Kandiel;D. Bahnemann
中科院分区：
文献类型：
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作者：
Liwu Zhang;Clarissa Baumanis;L. Robben;Tarek A. Kandiel;D. Bahnemann
光子晶体因其在基于光子能带结构概念的非传统方式操纵光方面的潜在应用而引起了广泛的兴趣。 [1] 在光子晶体中，由于折射率周期性调制产生的光子阻带，某些频率的光被禁止传播。 [2] 在此阻带附近的慢光传播是光子晶体的独特性质，并且对于提高太阳能电池中的光能转换效率、通过光催化水分解产生氢气以及用于环境修复的光催化过程特别感兴趣。 [3] 据报道，与传统的TiO 2 薄膜相比，TiO 2 反蛋白石薄膜表现出显着提高的光催化效率。这种效率的提高通常归因于光与TiO 2 相互作用的改善（由于阻带边缘附近的光群速度较低）、由于反蛋白石结构中的多重散射效应而改善的光收集以及促进反应物分子转移的连续孔道。 [ 3a、c、d]
Photonic crystals have attracted extensive interest for their potential applications in manipulating light in nontraditional ways based on photonic band-structure concepts. [ 1 ] In a photonic crystal, light with certain frequencies is forbidden to propagate due to a photonic stop band arising from the periodic modulation of the refractive index. [ 2 ] Slow light propagation near this stop band is a unique property of photonic crystals, and is of particular interest for enhancing the light energy-conversion effi ciency in solar cells, the hydrogen production through photocatalytic water splitting, and photocatalytic processes for environmental remediation. [ 3 ] It has been reported that TiO 2 inverse-opal fi lms exhibit signifi cantly increased photocatalytic effi ciencies as compared with conventional TiO 2 fi lms. This enhancement of the effi ciency is generally attributed to the improved interaction of light with TiO 2 due to the low group velocities of light near the stop-band edge, improved light harvesting due to the multiple scattering effect in the inverse-opal structure, and continuous pore channels that facilitate the transfer of reactant molecules. [ 3 a,c,d]