Ag3PO4 colloidal nanocrystal clusters with controllable shape and superior photocatalytic activity

像簇的 Ag < 潜水艇 class= “ a-plus-plus ” > 3 PO < 潜水艇 class= “ a-plus-plus ” > 包括 nanoparticles， trisoctahedrons，四面体和 tetrapods 的 4 nanostructures 被 Ag nanocrystals，磷酸盐阴离子和氢过氧化物的合作反应准备了。反应解决方案的酸味和碱度被调节调整 H 的氧化能力 < 潜水艇 class= “ a-plus-plus ” > 2 O < 潜水艇 class= “ a-plus-plus ” > 2 , 并且因此控制最后的形态学。是的 Ag nanocrystals 功能一位牺牲的先锋，导致像簇的 nanostructures 的产生。通过运动研究， Ag 的形成<潜水艇class=“ a-plus-plus ”> 3 PO <潜水艇class=“ a-plus-plus ”> 4 nanocrystal 簇能从 Ag 作为变换被理解到 Ag <潜水艇class=“ a-plus-plus ”> 3 PO <潜水艇class=“ a-plus-plus ”> 4 nanocrystals 由 H 帮助了<潜水艇class=“ a-plus-plus ”> 2 O <潜水艇class=“ a-plus-plus ”> 2 ,与特定的形状由 nanocrystals 的面向的附件列在后面进像簇的胶体。同样准备的 Ag <潜水艇class=“ a-plus-plus ”> 3 PO <潜水艇class=“ a-plus-plus ”> 4 nanostructures 比商业 TiO 举办更高的 photocatalytic 活动<潜水艇class=“ a-plus-plus ”> 2 和一些报导 Ag <潜水艇class=“ a-plus-plus ”> 3 PO <潜水艇class=“ a-plus-plus ”>在染料的降级的 4 microcrystals 。催化活动在顺序 nanoparticles 减少 > trisoctahedrons > 四面体 > tetrapods，当稳定性在顺序 nanoparticles

Cluster-like Ag3PO4 nanostructures including nanoparticles, trisoctahedrons, tetrahedrons and tetrapods have been prepared by the synergetic reaction of Ag nanocrystals, phosphate anions and hydrogen peroxide. The acidity and alkalinity of the reaction solution are tuned to adjust the oxidizing ability of H2O2, and thus control the final morphology. Ag nanocrystals function as a sacrificial precursor, leading to the generation of clusterqike nanostructures. Through a kinetic study, the formation of Ag3PO4 nanocrystal clusters can be understood as the conversion from Ag to AgBPO4 nanocrystals assisted by H2O2, followed by the oriented attachment of nanocrystals into cluster-like colloids with specific shapes. The as-prepared AgBPO4 nanostructures have higher photocatalytic activity than commercial TiO2 and some reported AgBPO4 microcrystals in the degradation of dyes. The catalytic activity decreases in the order nanoparticles 〉 trisoctahedrons 〉 tetrahedrons 〉 tetrapods, while the stability increases in the order nanoparticles 〈 tetrahedrons 〈 trisoctahedrons 〈 tetrapods, which can be explained by the extent of absorption of visible light and structural factors, including size and exposed crystal facets.