TY - JOUR A1 - Malow, Marcus A1 - Wehrstedt, Klaus-Dieter A1 - Schuurman, P. A1 - Hoeijmakers, P.M.M. T1 - Comments on 'thermal decomposition kinetic evaluation and its thermal hazards prediction of AIBN, by S. Guo, W. Wan, C. Chen and W.H. Chen' (Journal of thermal analysis and calorimetry (2013) 113:1169-1176, DOI 10.1007/s10973-013-2993-7) N2 - We read the paper by Guo et al. [1] with interest. The authors have investigated the thermal decomposition kinetics and thermal hazards of 2,2′-azobis(isobutyronitrile), AIBN, by differential scanning calorimetry (DSC) and used the Advanced Kinetics and Technology Solutions (AKTS) software to predict the thermal stability of AIBN in ton and kg scale. The main conclusion of interest is that the self-accelerating decomposition temperature (SADT) of a 50-kg standard package is 63 °C. PY - 2014 DO - https://doi.org/10.1007/s10973-014-3897-x SN - 1388-6150 SN - 1418-2874 SN - 0368-4466 SN - 1572-8943 VL - 117 IS - 3 SP - 1015 EP - 1016 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-31251 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Som, Tirtha A1 - Troppenz, G.V. A1 - Wendt, R. R. A1 - Wollgarten, M. A1 - Rappich, J. A1 - Emmerling, Franziska A1 - Rademann, Klaus T1 - Graphene oxide/alpha-Bi2O3 composites for visible-light photocatalysis, chemical catalysis, and solar energy conversion N2 - The growing challenges of environmental purification by solar photocatalysis, precious-metal-free catalysis, and photocurrent generation in photovoltaic cells receive the utmost global attention. Here we demonstrate a one-pot, green chemical synthesis of a new stable heterostructured, ecofriendly, multifunctional microcomposite that consists of α-Bi2O3 microneedles intercalated with anchored graphene oxide (GO) microsheets (1.0 wt?%) for the above-mentioned applications on a large economical scale. The bare α-Bi2O3 microneedles display two times better photocatalytic activities than commercial TiO2 (Degussa-P25), whereas the GO-hybridized composite exhibits approximately four to six times enhanced photocatalytic activities than the neat TiO2 photocatalyst in the degradation of colored aromatic organic dyes (crystal violet and rhodamine 6G) under visible-light irradiation (300 W tungsten lamp). The highly efficient activity is associated with the strong surface adsorption ability of GO for aromatic dye molecules, the high carrier acceptability, and the efficient electron–hole pair separation in Bi2O3 by individual adjoining GO sheets. The introduction of Ag nanoparticles (2.0 wt?%) further enhances the photocatalytic performance of the composite over eightfold because of a plasmon-induced electron-transfer process from Ag nanoparticles through the GO sheets into the conduction band of Bi2O3. The new composites are also catalytically active and catalyze the reduction of 4-nitrophenol to 4-aminophenol in the presence of borohydride ions. Photoanodes assembled from GO/α-Bi2O3 and Ag/GO/α-Bi2O3 composites display an improved photocurrent response (power conversion efficiency ~20?% higher) over those prepared without GO in dye-sensitized solar cells. KW - Bismuth KW - Dyes/pigments KW - Environmental chemistry KW - Graphene KW - Photochemistry PY - 2014 DO - https://doi.org/10.1002/cssc.201300990 SN - 1864-5631 SN - 1864-564X VL - 7 IS - 3 SP - 854 EP - 865 PB - Wiley-VCH CY - Weinheim AN - OPUS4-30390 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -