热处理蜡烛烟灰作为一种新型催化剂，可在生物电化学 Fenton 体系中增强原位过氧化氢的产生。
Thermally treated candle soot as a novel catalyst for hydrogen peroxide in-situ production enhancement in the bio-electro-Fenton system.
机构信息
School of Environmental and Civil Engineering, Jiangnan University, Wuxi, Jiangsu, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, Jiangsu, China; State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing, Jiangsu, China; Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, China.
School of Environmental and Civil Engineering, Jiangnan University, Wuxi, Jiangsu, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, Jiangsu, China.
出版信息
Chemosphere. 2021 Jan;262:127839. doi: 10.1016/j.chemosphere.2020.127839. Epub 2020 Aug 8.
Thermally treated candle soot (TCS) was used as a two-electron (2e¯) oxygen reduction reaction (ORR) catalyst to in situ produce HO in a bio-electro-Fenton (BEF) system. Compared with the pristine candle soot (CS), TCS showed larger Brunauer-Emmett-Teller (BET) surface area (102.54 m g vs. 61.79 m g), higher mesoporous ratio (50.39% vs. 34.98%), and improved hydrophilicity. X-ray photoelectron spectra (XPS) results revealed that the C-O-C was the dominant oxygen-containing group of the CS, and its percentage reached at 80.55%. However, the C-O-C ratio of the TCS decreased to 48.93%, whilst it's CO and OC-O ratios significantly increased to 27.92% and 23.15%. The TCS showed a high HO selectivity (87.5%∼97.0%) at the neutral pH condition, which was much higher than that of the commonly used carbon black (CB) catalyst. Finally, the HO concentration maxima (C-) of the bio-electro-Fenton system running with the TCS air-cathode (BEF-TCS) achieved at 32.02 mg/L, which was 6.29 times higher than that of the BEF-CB (5.09 mg/L). The removal and mineralization ratios of the SMX in the BEF-TCS reached at 83.0% and 79.0%, respectively. This paper reported a novel 2e¯ ORR electro-catalyst which was low-cost, easily available and highly efficiency.
经热处理的蜡烛烟灰（TCS）被用作双电子（2e¯）氧还原反应（ORR）催化剂，以在生物电化学-Fenton（BEF）系统中就地产生 HO。与原始蜡烛烟灰（CS）相比，TCS 表现出更大的 Brunauer-Emmett-Teller（BET）表面积（102.54 m g 对 61.79 m g）、更高的介孔率（50.39%对 34.98%）和改善的亲水性。X 射线光电子能谱（XPS）结果表明，CS 的主要含氧基团是 C-O-C，其比例达到 80.55%。然而，TCS 的 C-O-C 比例下降到 48.93%，而其 CO 和 OC-O 比例显著增加到 27.92%和 23.15%。TCS 在中性 pH 条件下表现出高 HO 选择性（87.5%∼97.0%），远高于常用的碳黑（CB）催化剂。最后，以 TCS 空气阴极（BEF-TCS）运行的生物电化学-Fenton 系统中 HO 浓度最大值（C-）达到 32.02 mg/L，是 BEF-CB（5.09 mg/L）的 6.29 倍。SMX 在 BEF-TCS 中的去除和矿化率分别达到 83.0%和 79.0%。本文报道了一种新型的 2e¯ ORR 电催化剂，具有成本低、易得和高效的特点。
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