Aqueous-phase hydrodechlorination and further hydrogenation of chlorophenols to cyclohexanone in water over palladium nanoparticles modified dendritic mesoporous silica nanospheres catalyst

Liu, Yansheng; Dong, Zhengping; Li, Xinlin; Le, Xuanduong; Zhang, Wei; Ma, Jiantai

doi:10.1039/c4ra16471g

Cited by 22 publications

(22 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even though no base additives was employed, the Pd/alk-Ti 3 C 2 X 2 catalyst exhibited a high HDC rate of 216.6 min −1 ·

. This value is higher than that of the reported Pd-based catalysts, such as Pd/Al 2 O 3 [ 38 ] and Pd/DMSNs [ 37 ], with kinetic reaction rates (k Pd ) of 3.33 and 13.2 min −1 ·

, respectively.…”

Section: Resultsmentioning

confidence: 61%

“…The yield of phenol gradually increases with the increase in reaction time. With respect to product distribution, phenol is detected as the sole product in the HDC process because of the low reaction temperature and catalyst concentration [ 37 ]. As reported previously, phenol could be further hydrogenated to cyclohexanone and/or cyclohexanol with a high catalyst concentration and high reaction temperature [ 14 , 20 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Palladium Supported on Titanium Carbide: A Highly Efficient, Durable, and Recyclable Bifunctional Catalyst for the Transformation of 4-Chlorophenol and 4-Nitrophenol

Fan

et al. 2018

Nanomaterials

View full text Add to dashboard Cite

Developing highly efficient and recyclable catalysts for the transformation of toxic organic contaminates still remains a challenge. Herein, Titanium Carbide (Ti3C2) MXene modified by alkali treatment process was selected as a support (designated as alk-Ti3C2X2, where X represents the surface terminations) for the synthesis of Pd/alk-Ti3C2X2. Results show that the alkali treatment leads to the increase of surface area and surface oxygen-containing groups of Ti3C2X2, thereby facilitating the dispersion and stabilization of Pd species on the surface of alk-Ti3C2X2. The Pd/alk-Ti3C2X2 catalyst shows excellent catalytic activity for the hydrodechlorination of 4-chlorophenol and the hydrogenation of 4-nitrophenol in aqueous solution at 25 °C and hydrogen balloon pressure. High initial reaction rates of 216.6 and 126.3 min−1·gpd−1 are observed for the hydrodechlorination of 4-chlorophenol and hydrogenation of 4-nitrophenol, respectively. Most importantly, Pd/alk-Ti3C2X2 exhibits excellent stability and recyclability in both reactions without any promoters. The superior property of Pd/alk-Ti3C2X2 makes it as a potential material for practical applications.

show abstract

“…Even though no base additives was employed, the Pd/alk-Ti 3 C 2 X 2 catalyst exhibited a high HDC rate of 216.6 min −1 ·

. This value is higher than that of the reported Pd-based catalysts, such as Pd/Al 2 O 3 [ 38 ] and Pd/DMSNs [ 37 ], with kinetic reaction rates (k Pd ) of 3.33 and 13.2 min −1 ·

, respectively.…”

Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Palladium Supported on Titanium Carbide: A Highly Efficient, Durable, and Recyclable Bifunctional Catalyst for the Transformation of 4-Chlorophenol and 4-Nitrophenol

Fan

et al. 2018

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…They also observed good catalytic activity under mild reaction conditions in addition to stability (recyclability) of the catalysts (Figure ). DFNS/Pd was also explored for the aqueous‐phase hydrodechlorination and then the hydrogenation of chlorophenols to cyclohexanone . The catalysts worked well for this process and followed a pseudo‐first‐order rate equation with a rate constant per unit mass ( k 1 ) of 13.2 min −1 g −1 .…”

Section: Catalysis Using Dfnsmentioning

confidence: 99%

Dendritic Fibrous Nanosilica for Catalysis, Energy Harvesting, Carbon Dioxide Mitigation, Drug Delivery, and Sensing

2017

View full text Add to dashboard Cite

Morphology‐controlled nanomaterials such as silica play a crucial role in the development of technologies for addressing challenges in the fields of energy, environment, and health. After the discovery of Stöber silica, followed by that of mesoporous silica materials, such as MCM‐41 and SBA‐15, a significant surge in the design and synthesis of nanosilica with various sizes, shapes, morphologies, and textural properties has been observed in recent years. One notable invention is dendritic fibrous nanosilica, also known as KCC‐1. This material possesses a unique fibrous morphology, unlike the tubular porous structure of various conventional silica materials. It has a high surface area with improved accessibility to the internal surface, tunable pore size and pore volume, controllable particle size, and, importantly, improved stability. Since its discovery, a large number of studies have been reported concerning its use in applications such as catalysis, solar‐energy harvesting, energy storage, self‐cleaning antireflective coatings, surface plasmon resonance‐based ultrasensitive sensors, CO2 capture, and biomedical applications. These reports indicate that dendritic fibrous nanosilica has excellent potential as an alternative to popular silica materials such as MCM‐41, SBA‐15, Stöber silica, and mesoporous silica nanoparticles. This Review provides a critical survey of the dendritic fibrous nanosilica family of materials, and the discussion includes the synthesis and formation mechanism, applications in catalysis and photocatalysis, applications in energy harvesting and storage, applications in magnetic and composite materials, applications in CO2 mitigation, biomedical applications, and analytical applications.

show abstract

“…Also this result agrees with the study that uses the same reaction system in which phenol as major product is detected. 13,32,[35][36][37][38] The HDC reaction pathway is described as below: H 2 adsorbed on the active site of the nanocatalyst is activated in two hydrogen atoms, in which 4-CP is also adsorbed on the surface of the Pd NPs. The C-Cl bond of 4-CP is attacked by the active hydrogen atoms to form phenol.…”

Section: Hdc Of 4-cpmentioning

confidence: 99%

“…The nitrogen, hydrogen, and carbon contents are 0.9%, 1.65%, and 3.92%, which are measured by the elementary analysis, respectively. The FT-IR spectra and elementary analysis results reveal that the APTES is successfully grafted on the surface of SiO2 30 , thus enabling them to act as robust anchors for metal NPs 31,32. The synthesis procedures of SiO 2 /Pd@m-SiO 2 nanaocatalyst are represented in Scheme 1 and described in detail in the experimental section.…”

mentioning

confidence: 99%

Hydrodechlorination of chlorophenols catalyzed by SiO2/Pd@m-SiO2 core-shell structured catalyst

Liu

Qiao

et al. 2015

Journal of Molecular Catalysis A: Chemical

Self Cite

View full text Add to dashboard Cite

Aqueous-phase hydrodechlorination and further hydrogenation of chlorophenols to cyclohexanone in water over palladium nanoparticles modified dendritic mesoporous silica nanospheres catalyst

Abstract: 1 to cyclohexanone in water over palladium nanoparticles modified dendritic 2 mesoporous silica nanospheres catalyst 3 4 Abstract 1 Dendritic mesoporous silica nanospheres (DMSNs) have been synthesised in this work. 2

Cited by 22 publications

References 35 publications

Palladium Supported on Titanium Carbide: A Highly Efficient, Durable, and Recyclable Bifunctional Catalyst for the Transformation of 4-Chlorophenol and 4-Nitrophenol

Palladium Supported on Titanium Carbide: A Highly Efficient, Durable, and Recyclable Bifunctional Catalyst for the Transformation of 4-Chlorophenol and 4-Nitrophenol

Dendritic Fibrous Nanosilica for Catalysis, Energy Harvesting, Carbon Dioxide Mitigation, Drug Delivery, and Sensing

Hydrodechlorination of chlorophenols catalyzed by SiO2/Pd@m-SiO2 core-shell structured catalyst

Contact Info

Product

Resources

About