Electrocatalytic hydrodechlorination of 4-chlorophenol on Pd supported multi-walled carbon nanotubes particle electrodes

Shu, Xiaoyu; Yang, Qi; Yao, Fubing; Zhong, Yu; Ren, Weichen; Chen, Fei; Sun, Jian; Ma, Yinghao; Fu, Zhiyan; Wang, Dongbo; Li, Xiaoming

doi:10.1016/j.cej.2018.10.095

Cited by 109 publications

(21 citation statements)

References 44 publications

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“…Precious-metal catalysts synthesized using ambient conditions have high activity in catalyzing dechlorination. , The use of precious-metal catalysts has been reported to eliminate 4-CP as well as other chlorinated contaminants, such as trichloroethene, lindane, pentachlorophenol, and polychlorinated biphenyls . Through hydrodechlorination by precious-metal catalysts, 4-CP is usually dechlorinated to phenol.…”

Section: Introductionmentioning

confidence: 99%

Para-Chlorophenol (4-CP) Removal by a Palladium-Coated Biofilm: Coupling Catalytic Dechlorination and Microbial Mineralization via Denitrification

Long

Zheng

et al. 2021

Environ. Sci. Technol.

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Rapid dechlorination and full mineralization of para-chlorophenol (4-CP), a toxic contaminant, are unfulfilled goals in water treatment. Means to achieve both goals stem from the novel concept of coupling catalysis by palladium nanoparticles (PdNPs) with biodegradation in a biofilm. Here, we demonstrate that a synergistic version of the hydrogen (H 2 )-based membrane biofilm reactor (MBfR) enabled simultaneous removals of 4-CP and cocontaminating nitrate. In situ generation of PdNPs within the MBfR biofilm led to rapid 4-CP reductive dechlorination, with >90% selectivity to more bioavailable cyclohexanone. Then, the biofilm mineralized the cyclohexanone by utilizing it as a supplementary electron donor to accelerate nitrate reduction. Long-term operation of the Pd-MBfR enriched the microbial community in cyclohexanone degraders within Clostridium, Chryseobacterium, and Brachymonas. In addition, the PdNP played an important role in accelerating nitrite reduction; while NO 3 − reduction to NO 2 − was entirely accomplished by bacteria, NO 2 − reduction to N 2 was catalyzed by PdNPs and bacterial reductases. This study documents a promising option for efficient and complete remediation of halogenated organics and nitrate by the combined action of PdNP and bacterial catalysis.

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Section: Introductionmentioning

confidence: 99%

Para-Chlorophenol (4-CP) Removal by a Palladium-Coated Biofilm: Coupling Catalytic Dechlorination and Microbial Mineralization via Denitrification

Long

Zheng

et al. 2021

Environ. Sci. Technol.

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“…Chlorophenols (CPs) are a class of significant pollutants in wastewater effluents since they are used extensively in the manufacture of germicides, fungicides, herbicides, pesticide, and wood protectors (Ge et al, 2017). Owing to their wide application and physicochemical properties, chlorophenols have been detected in groundwater, sediments, soil, and organisms (Shu et al, 2019;Zhao et al, 2017). Some chlorophenols are now listed as priority pollutants due to their high toxicity, low biodegradability, potential carcinogenic, teratogenic, or mutagenic, and persistence in the environment (Liu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Promoted liquid-phase hydrodechlorination of chlorophenol over Raney Ni via controlling base: Performance, mechanism, and application

Liu

et al. 2020

Chemosphere

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“…Recently, tubular nanoreactors with doped or supported noble metal NPs illustrate better electrocatalytic performance due to their elongated structures and the confinement effect. − However, the current synthesis of tubular catalytic nanoreactors commonly employs the presynthesized nanotubes such as silica, titania, or carbon to support the metal NPs, − that is, the postsynthesis, and the distribution of some metal NPs on the outer surfaces of nanotubes is inevitable. To exclusively encapsulate the metal NPs inside nanotubes, one-pot synthesis of tubular catalytic nanoreactors is highly desirable.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Construction of Silica Nanotubes Loaded with Pd Nanoparticles for Catalytic Hydrodechlorination of Chlorophenols

Liu

et al. 2021

ACS Appl. Nano Mater.

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In this study, we for the first time use ditopic bis-terpyridine-containing metallopolymers as templates to synthesize metal nanoparticle-encapsulated nanoreactors. In the presence of the surfactant cetyltrimethylammonium bromide, the ditopic bis-terpyridines coordinate Pd 2+ ions to form linear metallopolymer bundles, which are further used as templates for silica deposition to give silicified Pd ion-containing tubular metallopolymers. The following calcination and subsequent reduction simultaneously result in Pd NP-encapsulated silica nanotubes (Pd-SNTs). Relative to the silica-supported Pd catalysts, the prepared Pd-SNTs demonstrate enhanced performance for hydrodechlorinations of various chlorophenols into phenolic compounds at 35 °C and atmospheric H 2 pressure and present high catalytic stability during five cycles of hydrodechlorination reactions.

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Electrocatalytic hydrodechlorination of 4-chlorophenol on Pd supported multi-walled carbon nanotubes particle electrodes

Cited by 109 publications

References 44 publications

Para-Chlorophenol (4-CP) Removal by a Palladium-Coated Biofilm: Coupling Catalytic Dechlorination and Microbial Mineralization via Denitrification

Para-Chlorophenol (4-CP) Removal by a Palladium-Coated Biofilm: Coupling Catalytic Dechlorination and Microbial Mineralization via Denitrification

Promoted liquid-phase hydrodechlorination of chlorophenol over Raney Ni via controlling base: Performance, mechanism, and application

Simultaneous Construction of Silica Nanotubes Loaded with Pd Nanoparticles for Catalytic Hydrodechlorination of Chlorophenols

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