Mechanisms and Applications of Photocatalytic Reactions in the Gas Phase

光催化远程氧化和光催化光刻的主要机制被揭示如下：过氧化氢产生的光催化剂上的气相中扩散，然后通过光解的羟基自由基，这是活性物种。将光催化光刻技术应用于多通道生物传感器阵列的研制，在光催化剂与氧化还原活性固体之间的电子交换以及在储能光催化剂方面的应用方面，研究了TiO_2与WO_3和MoO_3之间的光诱导电子转移和质子转移。研究了还原储能的量子效率和容量以及吸附水对储能的影响。结果表明，在光激发的TiO_2中，电子可以从Ni（OH）_2转移到空穴中。TiO_2-Ni（OH）_2复合膜是一种氧化储能光催化剂。它应该能够去除一些有害化合物，如甲醛，即使在黑暗中。在金属纳米颗粒-半导体体系的等离子体光电化学方面，发现了Ag纳米颗粒-TiO_2体系的等离子体光致变色现象，并对其机理进行了研究，发现金属纳米颗粒-半导体界面的光致电荷分离起着重要作用。电荷分离过程可应用于太阳能电池和太阳能电池。研究表明，与入射光共振的银纳米粒子的光电化学溶解和非共振银纳米粒子的沉积和生长是导致光谱变化的原因。我们制备了Au纳米结构，发现纳米锥具有宽的等离子体共振带。光电化学致动器，膨胀和收缩响应光的开发。还开发了基于藻类趋光性的生物传感器。

Major mechanisms of photocatalytic remote oxidation and photocatalytic lithography were revealed to be as follows: hydrogen peroxide generated on a photocatalyst diffuses in the gas phase, followed by photolysis to hydroxyl radicals, which are the active species. Photocatalytic lithography was applied to development of multichannel biosensor arrays.Regarding electron exchange between a photocatalyst with redox-active solids and the application to energy storage photocatalysts, photo-induced electron transfer and proton transport from TiO_2 to WO_3 and MoO_3 were studied. Quantum efficiencies and capacities of the reductive energy storage and effects of adsorbed water on the energy storage were studied. It was found that electron transfer is possible from Ni(OH)_2 to holes in photo-excited TiO_2. A TiO_2-Ni(OH)_2 composite film works as an oxidative energy storage photocatalyst. It should be able to remove some harmful compounds such as formaldehyde even after dark. An Ir oxide and a Ru oxide exhibit higher oxidation abilities as oxidative energy storage materials.Regarding plasmon photoelectrochemistry of metal nanoparticles-semiconductor systems, multicolor photochromism of Ag nanoparticles-TiO_2 systems was found. In the mechanistic study of the photochromism, it was found that photo-induced charge separation at the metal nanoparticle-semiconductor interface plays an essential role. The charge separation process can be applied to solar cells and photocatalysis. I was evidenced that photoelectrochemical dissolution of Ag nanoparticles resonant with an incident light and deposition and growth of non-resonant Ag nanoparticles are responsible for the spectral changes.Au nanostructures were developed and nanopyramids were found to exhibit a broad plasmon resonance band. Photoelectrochemical actuators, which swell and shrink in response to light were developed. Biosensors based on algal phototaxis were also developed.