Deactivating harmful marine microorganisms through photoelectrocatalysis by GO/ZnWO4 electrodes

Zhan, Shu‐Zhong; Zhou, Feng; Huang, Naibao; He, Qiuchen; Zhu, Yongfa

doi:10.1016/j.cej.2017.08.002

Cited by 35 publications

(8 citation statements)

References 45 publications

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“…To improve the carrier separation efficiency of ZnWO 4 , a graphene oxide (GO)/ZnWO 4 composite electrode was synthesized by a combination of hydrothermal and coating methods. 320 GO can eliminate the defects at the surface of ZnWO 4 and boost the separation efficiency of electrons and holes. However, it has been reported that defect-rich ZnWO 4 -modified WO 3 nanorods enriched in W 5þ exhibited a current density as high as 1.87 mW cm −2 (Figure 14A), which is attributed to the enhanced efficiencies of light absorption (Figure 14B) and charge separation (Figure 14C).…”

Section: Znwomentioning

confidence: 99%

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Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Wang,

Liu,

Zhang

et al. 2023

EcoEnergy

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Photoelectrochemical (PEC) water splitting with zero carbon emissions is a promising technology to solve the global issues of energy shortage and environmental pollution. However, the current development of PEC systems is facing a bottleneck of low solar‐to‐hydrogen (STH) efficiency (<10%), which cannot meet the demand of large‐scale H2 production. The development of low‐cost, highly active, and stable photoanode materials is crucial for high STH efficiency of PEC water splitting. The recent development of BiVO4 as photoanode materials for PEC water splitting has been a great success, and ABO4‐type ternary metal oxides with a similar structure to BiVO4 have high development potential as efficient photoanodes for high‐performance PEC water splitting. The design and development of ABO4 photoanodes for PEC water splitting are critically reviewed with special emphasis on the modification strategies and performance improvement mechanisms of each semiconductor. The comprehensive analysis in this review provides guidelines and insights for the exploration of new high‐efficiency photoanodes for solar fuel production.

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Section: Znwomentioning

confidence: 99%

Section: Recent Developments Of Abo4 Photoanode Materialsmentioning

confidence: 99%

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Wang,

Liu,

Zhang

et al. 2023

EcoEnergy

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“… 1 , 2 It works by using photocatalytic technology to generate hydroxyl radicals, which are then used to inactivate marine microorganisms. 3 , 4 However, there are two significant challenges in using photocatalytic technology to treat ballast water. The first is that photocatalytic efficiency is low.…”

Section: Introductionmentioning

confidence: 99%

“…The Pureballast water treatment system was the world’s first ballast water treatment system to be approved by the International Maritime Organization. , It works by using photocatalytic technology to generate hydroxyl radicals, which are then used to inactivate marine microorganisms. , However, there are two significant challenges in using photocatalytic technology to treat ballast water. The first is that photocatalytic efficiency is low. − The second is that the complex components in seawater will further reduce photocatalytic efficiency. , In particular, salt can deactivate the catalyst or consume the photogenerated carrier, leading to undesirable side reactions on the catalyst surface and severely limiting the industrialization of daylight production of H 2 O 2 . , Both conditions limit the effectiveness of microorganisms in ballast water.…”

Section: Introductionmentioning

confidence: 99%

A Tandem Reaction System for Inactivation of Marine Microorganisms by Commercial Carbon Black and Boron-Doped Carbon Nitride

Zhan

Zhou

2022

ACS Omega

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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 (H 2 O 2 ) was constructed for the inactivation of marine microorganisms. Using seawater and air as raw materials, electrocatalytic synthesis of H 2 O 2 by commercial carbon black can avoid the risk of large-scale storage and transportation of H 2 O 2 on ships. In addition, boron doping can improve the photocatalytic decomposition performance of H 2 O 2 by g-C 3 N 4 . 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-C 3 N 4 decomposition of H 2 O 2 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 H 2 O 2 . This work can provide some reference for the photocatalytic technology study of ballast water treatment.

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“…In chemical disinfection, chemical substances are added to seawater to produce total residual oxidants (TROs) known as disinfection agents (e.g., chlorine, hypochlorite, and ozone). In electrochemical disinfection, total chlorine-based disinfection species (TC) are produced in NaCl-containing solutions in situ because of the application of an electric current at the interphase of the electrode and water. , Among various disinfecting methods, − the electrochemical on-site production of chlorine , (Figure b) is widely used because of its cost-effectiveness and simplicity in particular for seawater disinfection. This process produces chlorine by adjusting the applied potential or current in the system.…”

Section: Introductionmentioning

confidence: 99%

Disinfection-Dechlorination Battery for Safe Water Production

et al. 2021

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With increasing population growth, it is necessary to meet safe water demands. Water disinfection through chlorination is the most commonly used method for safe water production. The electrolysis of salted water is a promising technology for the on-site generation of disinfecting agents, however, its low efficiency and inability to neutralize the remaining free chlorine makes electrolysis inefficient. The introduction of a cation permeable membrane between anode and cathode can help to improve the disinfection efficiency and also dechlorinate the remained free chlorine by switching the anode and cathode. However, the scale formation on the membrane will reduce the performance of the system. In this study, with using a Na-selective membrane for separating anode and cathode, we propose a disinfection-dechlorination battery (DD-battery) consisting of an anode for energy storage through Na + reduction to metal Na and a cathode for disinfection via Cl − oxidation to free chlorine species. The stored energy in the anode is released during discharge, and the system can dechlorinate the remaining free chlorine to prevent disinfectant toxicity. This self-disinfectiondechlorination during battery cycling can be combined with renewable energy sources for efficient water disinfection in remote regions.

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Deactivating harmful marine microorganisms through photoelectrocatalysis by GO/ZnWO4 electrodes

Cited by 35 publications

References 45 publications

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

A Tandem Reaction System for Inactivation of Marine Microorganisms by Commercial Carbon Black and Boron-Doped Carbon Nitride

Disinfection-Dechlorination Battery for Safe Water Production

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Deactivating harmful marine microorganisms through photoelectrocatalysis by GO/ZnWO4 electrodes

Cited by 35 publications

References 45 publications

Development of ABO4‐type photoanodes for photoelectrochemical water splitting

Development of ABO4‐type photoanodes for photoelectrochemical water splitting

A Tandem Reaction System for Inactivation of Marine Microorganisms by Commercial Carbon Black and Boron-Doped Carbon Nitride

Disinfection-Dechlorination Battery for Safe Water Production

Contact Info

Product

Resources

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Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting