Abstract

Solution combustion synthesis (SCS) of zinc oxide was performed using a binary fuel, glycine and citric acid. It was established that combustion occurs due to oxidation of zinc nitrate–glycine complexes. Citric acid acts as an inhibitor of SCS reaction. An increase in relative content of organic fuel in the solution leads to a reduction in maximal combustion temperature and to formation of elemental carbon (0.2–1.6 wt %) and organic fragments (1.55–3.29 wt %) in SCS-produced zinc oxide. Carbon impurity and organic fragments were removed by annealing at 600°С. The produced wurtzite-type ZnO crystals had a size of 27–37 nm and were assembled into agglomerates. After annealing at 500°С, the specific surface of the powder was 8.44–11.09 m²/g. The photocatalytic activity of ZnO powder was evaluated from the rate of hydroquinone photodecomposition in solution.

中文翻译：

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二元燃料（甘氨酸+柠檬酸）溶液燃烧合成ZnO

摘要

使用二元燃料，甘氨酸和柠檬酸进行氧化锌的固溶燃烧合成（SCS）。已经确定燃烧是由于硝酸锌-甘氨酸络合物的氧化而发生的。柠檬酸可作为SCS反应的抑制剂。溶液中有机燃料相对含量的增加会导致最高燃烧温度的降低，并导致在SCS生产的氧化锌中形成元素碳（0.2–1.6 wt％）和有机碎片（1.55-3.29 wt％）。通过在600°C退火去除碳杂质和有机碎片。产生的纤锌矿型ZnO晶体尺寸为27-37 nm，并组装成团块。在500°С退火后，粉末的比表面积为8.44-11.09 m ²/G。从溶液中对苯二酚的光分解速率评价ZnO粉末的光催化活性。