Nanostructured SnO₂:Al powders were prepared and their electro-optical activities were regulated by using a micro drop fluidized reactor (MDFR), which were conducted continuously in a simple one-step process without additional calcination, annealing, and drying steps. The crystallite size and BET surface area (up to a 2.6 times) increased but bandgap energy of SnO₂:Al powders decreased, respectively, by providing the unique pyro-hydraulic reaction conditions during the formation of powders. The micro shear force and strain generated due to the fluidization of micro drops could enhance the doping effects and surface activities of SnO₂:Al powders. The analyzes of room-temperature photoluminescence (PL) spectra, UV–vis photospectroscope and X-ray photoelectron spectra (XPS) exhibited that the surface activities of SnO₂:Al powders were enhanced considerably by regulating the excitation and separation of electrons and holes and increasing the oxygen vacancies at the surface of SnO₂:Al powders by means of U_MB control. The optimum amount of dopant of Al³⁺ ions (C_Al) and flow rate of micro bubbles (U_MB) for effective surface activities were 2.0at% and 1.0 L/min, respectively. The scheme of photocatalytic mechanism of SnO₂:Al powders to degrade the methylene blue (MB) was discussed by means of surface charge transfer and morphology of the powders.

制备了纳米结构的SnO ₂：Al粉末，并通过使用微滴流化反应器（MDFR）调节了其电光活性，该反应器以简单的一步法连续进行，无需额外的煅烧，退火和干燥步骤。通过在粉末形成期间提供独特的热解-液压反应条件，微晶尺寸和BET表面积（最大2.6倍）增加，但SnO ₂：Al粉末的带隙能分别降低。由于微滴的流化而产生的微剪切力和应变可以增强SnO ₂的掺杂效果和表面活性：铝粉 对室温光致发光（PL）光谱，紫外可见光谱仪和X射线光电子能谱（XPS）的分析表明，通过调节电子和空穴的激发和分离，SnO ₂：Al粉末的表面活性得到了显着增强。通过_UMB控制增加SnO ₂：Al粉末表面的氧空位。有效表面活性的最佳Al ³⁺离子掺杂量（C _Al）和微气泡流速（U _MB）分别为2.0at％和1.0 L / min。SnO ₂的光催化机理图：通过表面电荷转移和粉末形态来讨论：Al粉末降解亚甲基蓝（MB）的方法。