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中文摘要：
以沉淀法制备了高活性ZnO纳米丛（nanobushes,ZNB）,以水热反应制备得到普通ZnO纳米颗粒（nanoparticles,ZNP）.利用X射线衍射仪（XRD）、透射电镜（TEM）、扫描电镜（SEM）、比表面积测定仪（BET）和光致发光光谱（PL）等手段对ZNB和ZNP进行了表征,并比较了其光催化活性的差异.在紫外光（λ≤387 nm）照射40 min后ZNB使有机染料罗丹明B（Rhodamine B,RhB）完全褪色,而相同条件下ZNP仅能使RhB褪色53%.通过总有机碳（TOC）的测定,研究了ZnO对RhB深度氧化矿化程度,光照6 h后ZNB对RhB矿化率高达92%,而ZNP对RhB的矿化率只有77%.跟踪测定了光催化降解过程中活性氧化物种相对含量的变化,表明紫外光激发条件下,ZnO光催化反应机理主要涉及羟基自由基（.OH）历程,且ZNB产生活性氧化物种的量高于ZNP.
英文摘要：
In this article, ZnO nanobushes （ZNB） with high method, and regular ZnO nanoparticles （ZNP） were p photocatalytic activity were obtained by precipitation repared by hydrothermal method. The prepared ZnO samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, the Brunauer-Emmett-Teller and photoluminescence spectroscopy. Under UV irradiation （λ≤ 387 nm）, ZNB showed a better photocatalytic acitivity than ZNP, which only degraded 53% rhodamine B （RhB） in 40 min, while the former degraded it completely. The measurement of total organic carbon （TOC） showed that 92% RhB was mineralized in 6 h by ZNB, but only 77% by ZNP. Reactive oxygen species was detected by horseradish peroxidase spectro-photometry and benzoic acid flurescence. The results indicated that ZnO photocatalytic mechanism involved hydroxyl radicals, and ZNB produced more reactive oxygen species than ZNP. Degradation of 2,4-dichlorophenol （2,4-DCP） under UV irradiation was also used to test the photocatalytic activity of ZNB and ZNP.
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