CNR-ICMATE and INSTM, Department of Chemical Sciences, Padova University, Via Marzolo 1, 35131 Padova, Italy.
Nanoscale. 2018 Dec 20;11(1):98-108. doi: 10.1039/c8nr06468g.
Supported MnO2-based nanomaterials were fabricated on fluorine-doped tin oxide substrates using plasma enhanced-chemical vapor deposition (PE-CVD) between 100 °C and 400 °C, starting from a fluorinated Mn(ii) diamine diketonate precursor. Growth experiments yielded β-MnO2 with a hierarchical morphology tuneable from dendritic structures to quasi-1D nanosystems as a function of growth temperature, whose variation also enabled a concomitant tailoring of the system fluorine content, and of the optical absorption and band gap. Preliminary photocatalytic tests were aimed at the investigation of photoinduced hydrophilic (PH) and solid phase photocatalytic (PC) performances of the present nanomaterials, as well as at the photodegradation of Plasmocorinth B azo-dye aqueous solutions. The obtained findings highlighted an attractive system photoactivity even under visible light, finely tailored by fluorine content, morphological organization and optical properties of the prepared nanostructures. The results indicate that the synthesized MnO2 nanosystems have potential applications as advanced smart materials for anti-fogging/self-cleaning end uses and water purification.
采用等离子体增强化学气相沉积（PE-CVD）法，在 100°C 至 400°C 的温度范围内，以氟化的 Mn(ii)二胺二酮酸酯前体为原料，在掺氟氧化锡（FTO）基底上制备了负载型 MnO2 纳米材料。生长实验得到了β-MnO2，其分级形貌可从树枝状结构调谐到准一维纳米系统，这取决于生长温度，这种变化还能够同时调整系统的氟含量、光吸收和带隙。初步的光催化测试旨在研究本纳米材料的光诱导亲水（PH）和固相光催化（PC）性能，以及 Plasmocorinth B 偶氮染料水溶液的光降解。研究结果表明，即使在可见光下，通过调整氟含量、所制备纳米结构的形态组织和光学性能，该体系也具有很好的光催化活性。结果表明，所合成的 MnO2 纳米系统有望作为先进的智能材料，应用于防雾/自清洁等领域以及水净化。
