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A Tandem Reaction System for Inactivation of Marine Microorganisms by Commercial Carbon Black and Boron-Doped Carbon Nitride
ACS Omega ( IF 3.7 ) Pub Date : 2022-05-07 , DOI: 10.1021/acsomega.2c00679 Qiuchen He 1 , Su Zhan 1 , Feng Zhou 1
ACS Omega ( IF 3.7 ) Pub Date : 2022-05-07 , DOI: 10.1021/acsomega.2c00679 Qiuchen He 1 , Su Zhan 1 , Feng Zhou 1
Affiliation
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The Pureballast system, based on photocatalytic technology, can purify ships’ ballast water. However, the efficiency of photocatalytic sterilization still needs to be improved due to the shortcomings of the photocatalyst itself and the complex components of seawater. In this work, a tandem reaction of electrocatalytic synthesis and photocatalytic decomposition of hydrogen peroxide (H2O2) was constructed for the inactivation of marine microorganisms. Using seawater and air as raw materials, electrocatalytic synthesis of H2O2 by commercial carbon black can avoid the risk of large-scale storage and transportation of H2O2 on ships. In addition, boron doping can improve the photocatalytic decomposition performance of H2O2 by g-C3N4. Experimental results show that constructing the tandem reaction is effective, inactivating 99.7% of marine bacteria within 1 h. The sterilization efficiency is significantly higher than that of the single way of electrocatalysis (52.8%) or photocatalysis (56.9%). Consequently, we analyzed the reasons for boron doping to enhance the efficiency of g-C3N4 decomposition of H2O2 based on experiments and first principles. The results showed that boron doping could significantly enhance not only the transfer kinetics of photogenerated electrons but also the adsorption capacity of H2O2. This work can provide some reference for the photocatalytic technology study of ballast water treatment.
中文翻译：
商业炭黑和掺硼氮化碳灭活海洋微生物的串联反应系统
Pureballast系统基于光催化技术，可以净化船舶压载水。但由于光催化剂本身的缺点和海水成分复杂，光催化杀菌的效率仍有待提高。在这项工作中，构建了过氧化氢（H 2 O 2）的电催化合成和光催化分解的串联反应，用于灭活海洋微生物。以海水和空气为原料，商业炭黑电催化合成H 2 O 2可规避H 2 O 2大规模储运风险在船上。此外，硼掺杂可以提高gC 3 N 4对H 2 O 2的光催化分解性能。实验结果表明，构建串联反应是有效的，1 h内灭活99.7%的海洋细菌。杀菌效率明显高于单一方式的电催化（52.8%）或光催化（56.9%）。因此，我们分析了硼掺杂提高gC 3 N 4分解H 2 O 2效率的原因。基于实验和第一原理。结果表明，硼掺杂不仅能显着提高光生电子的转移动力学，还能显着提高H 2 O 2的吸附能力。该工作可为压载水光催化技术研究提供一定的参考。
更新日期：2022-05-07
中文翻译：
商业炭黑和掺硼氮化碳灭活海洋微生物的串联反应系统
Pureballast系统基于光催化技术，可以净化船舶压载水。但由于光催化剂本身的缺点和海水成分复杂，光催化杀菌的效率仍有待提高。在这项工作中，构建了过氧化氢（H 2 O 2）的电催化合成和光催化分解的串联反应，用于灭活海洋微生物。以海水和空气为原料，商业炭黑电催化合成H 2 O 2可规避H 2 O 2大规模储运风险在船上。此外，硼掺杂可以提高gC 3 N 4对H 2 O 2的光催化分解性能。实验结果表明，构建串联反应是有效的，1 h内灭活99.7%的海洋细菌。杀菌效率明显高于单一方式的电催化（52.8%）或光催化（56.9%）。因此，我们分析了硼掺杂提高gC 3 N 4分解H 2 O 2效率的原因。基于实验和第一原理。结果表明，硼掺杂不仅能显着提高光生电子的转移动力学，还能显着提高H 2 O 2的吸附能力。该工作可为压载水光催化技术研究提供一定的参考。
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