Nivetha Ravi, Kollu Pratap, Chandar Krishna, Pitchaimuthu Sudhagar, Jeong Soon Kwan, Grace Andrews Nirmala
Centre for Nanotechnology Research, VIT University Vellore India-632014
Thin Film Magnetism Group, Cavendish Laboratory, Department of Physics, University of Cambridge Cambridge CB3 0HE UK.
RSC Adv. 2019 Jan 23;9(6):3215-3223. doi: 10.1039/c8ra08208a. eCollection 2019 Jan 22.
The role of breathing behavior in hydrated and dehydrated forms of MIL-53(Fe) is investigated here. The material can be used as an efficient electrocatalyst and photocatalyst for a hydrogen evolution reaction (HER) in an alkaline medium and the same was further tested for the degradation of organic pollutants. The as-synthesized MIL-53(Fe)/hydrated and dehydrated forms were characterized by different analytical techniques to study their structure, morphology, surface analysis, thermal, physical and chemical properties. The breathing behavior of the hydrated and dehydrated forms of MIL-53(Fe) was studied through BET surface analysis. Our results show a low onset potential (-0.155 V and -0.175 V), Tafel slope (71.6 mV per decade, 88.7 mV per decade) and a large exchange current density (1.6 × 10 mA cm and 2.5 × 10 mA cm). Hydrated and dehydrated MIL-53(Fe) degraded an RhB dye solution within 30 minutes thus proving their efficiency as efficient photocatalysts.
本文研究了MIL-53(Fe)的水合和脱水形式中呼吸行为的作用。该材料可作为碱性介质中析氢反应（HER）的高效电催化剂和光催化剂，并进一步测试了其对有机污染物的降解性能。通过不同的分析技术对合成的MIL-53(Fe)/水合和脱水形式进行了表征，以研究其结构、形态、表面分析、热、物理和化学性质。通过BET表面分析研究了MIL-53(Fe)水合和脱水形式的呼吸行为。我们的结果显示出低起始电位（-0.155 V和-0.175 V）、塔菲尔斜率（每十倍频程71.6 mV，每十倍频程88.7 mV）和大交换电流密度（1.6×10 mA cm和2.5×10 mA cm）。水合和脱水的MIL-53(Fe)在30分钟内降解了罗丹明B染料溶液，从而证明了它们作为高效光催化剂的效率。
