Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Zhengzhou 450002, China.
Department of Computing, SEECS, National University of Sciences and Technology (NUST), Campus, Sector H-12, Islamabad, Pakistan.
Bioresour Technol. 2022 Jul;355:127299. doi: 10.1016/j.biortech.2022.127299. Epub 2022 May 10.
The goal of this research was to study the role of excess charges in regulating biohydrogen production from Paulownia. The excess charges were generated through charge compensation in SnO nanocatalysts by Zn doping. The maximum hydrogen yield of 335 mL was observed at 8%Zn doping with a concentration of 150 mg/L, 47% higher as compared to standard sample. It was observed that the hydrogen production rate increased with Zn doping and the highest value (77 mL/h) was observed for 8%Zn at 24 h. The decrease in the total amount of byproducts (2.52 g/L from 4.28 g/L) at 8% Zn indicates an increase in bacterial metabolism. The lowest value of oxidation-reduction potential (-525 mV) at 24 h for 8%Zn confirms that Zn doping provides excessive electrons to the fermentative medium which helps the bacteria to transfer electrons faster during the redox reaction, hence, enhancing the enzymatic process and eventually hydrogen production.
本研究旨在探讨过剩电荷在调控泡桐生物制氢中的作用。过剩电荷通过 SnO 纳米催化剂中的 Zn 掺杂实现电荷补偿产生。在 150mg/L 浓度下，8%Zn 掺杂时最大产氢量为 335mL，比标准样品高 47%。研究发现，随着 Zn 掺杂量的增加，产氢速率增加，在 24h 时，Zn 掺杂量为 8%时达到最高值（77mL/h）。在 8%Zn 时，副产物总量（从 4.28g/L 减少到 2.52g/L）的减少表明细菌代谢增加。在 24h 时，Zn 掺杂量为 8%时的氧化还原电位最低（-525mV），这证实了 Zn 掺杂为发酵介质提供了过多的电子，这有助于细菌在氧化还原反应过程中更快地传递电子，从而增强酶促过程并最终提高产氢量。
