Highly efficient de-polymerization of organosolv lignin using a catalytic hydrothermal process and production of phenolic resins/adhesives with the depolymerized lignin as a substitute for phenol at a high substitution ratio

2013 ◽  
Vol 44 ◽  
pp. 315-322 ◽  
Author(s):  
Shuna Cheng ◽  
Zhongshun Yuan ◽  
Mathew Leitch ◽  
Mark Anderson ◽  
Chunbao (Charles) Xu
Keyword(s):  
Hydrothermal Process ◽  
Phenolic Resins ◽  
Highly Efficient ◽  
Organosolv Lignin ◽  
Substitution Ratio

Organosolv Lignin-Modified Phenolic Resins

1989 ◽  
pp. 324-333 ◽  
Author(s):  
Phillip M. Cook ◽  
Terry Sellers
Keyword(s):  
Phenolic Resins ◽  
Organosolv Lignin

Tungsten oxysulfide nanosheets for highly sensitive and selective NH3 sensing

2020 ◽  
Vol 8 (12) ◽  
pp. 4206-4214 ◽  
Author(s):  
Yanan Zheng ◽  
Lan Sun ◽  
Weiwei Liu ◽  
Chen Wang ◽  
Zhengfei Dai ◽  
...  
Keyword(s):  
Hydrothermal Process ◽  
Highly Efficient ◽  
Highly Sensitive ◽  
One Step

Ultrathin tungsten oxysulfide (WS2|O) nanosheets are fabricated through a one-step hydrothermal process and employed for highly efficient chemiresistive NH3 sensing.

Highly efficient, NiAu-catalyzed hydrogenolysis of lignin into phenolic chemicals

2014 ◽  
Vol 16 (5) ◽  
pp. 2432-2437 ◽  
Author(s):  
Jiaguang Zhang ◽  
Hiroyuki Asakura ◽  
Jeaphianne van Rijn ◽  
Jun Yang ◽  
Paul Duchesne ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pure Water ◽  
Highly Efficient ◽  
Organosolv Lignin ◽  
First Time

A highly efficient, stable NiAu catalyst that exhibits unprecedented low temperature activity in lignin hydrogenolysis was for the first time developed, leading to the formation of 14 wt% aromatic monomers from organosolv lignin at 170 °C in pure water.

An Inexpensive, Stable and Highly Efficient Photocatalyst for Degradation of Organic Dyes in Water: Core-Shell Montmorillonite-TiO2 Colloids

2013 ◽  
Vol 864-867 ◽  
pp. 404-407
Author(s):  
Shi Zhao Kang ◽  
Tan Wu ◽  
Xiang Qing Li ◽  
Yi Lun Zhou ◽  
Jin Mu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Organic Dyes ◽  
Hydrothermal Process ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Highly Efficient ◽  
Transmission Electron ◽  
The Stability

Core-shell montmorillonite-TiO2 colloids were prepared in a hydrothermal process and characterized with transmission electron microscope, powder X-ray diffraction analysis, Brunauer-Emmett-Teller analysis and UV-vis spectra. Afterwards, their photocatalytic activity was investigated under UV irradiation using methyl orange as a model contaminant. In addition, the stability of the core-shell montmorillonite-TiO2 colloids was investigated by repeatedly performing methyl orange photocatalytic degradation experiments. The results indicate the as-prepared core-shell montmorillonite-TiO2 colloids are a highly efficient photocatalyst for the degradation of organic dyes in water. And this photocatalytic activity remains almost unchanged after eight successive cycles.

Graphene quantum dots as a highly efficient electrocatalyst for lithium–oxygen batteries

2020 ◽  
Vol 8 (42) ◽  
pp. 22356-22368
Author(s):  
Yuanguo Wu ◽  
Xingbao Zhu ◽  
Xin Ji ◽  
Weilong Liu ◽  
Weihua Wan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrothermal Process ◽  
Graphene Quantum Dots ◽  
Highly Efficient ◽  
Lithium Oxygen Battery ◽  
Lithium Oxygen Batteries ◽  
First Time ◽  
Cathodic Catalyst

Herein, we successfully synthesized glucose-derived graphene quantum dots (GQDs) through a hydrothermal process, which were further employed as an efficient cathodic catalyst in a non-aqueous lithium–oxygen battery for the first time.

Comparison of organic acid-based organosolv lignins extracted from the residues of five annual crops

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 7966-7990
Author(s):  
Nadja Cachet ◽  
Bouchra Benjelloun-Mlayah
Keyword(s):  
Corn Stover ◽  
Rice Straw ◽  
Sugarcane Bagasse ◽  
Lignin Content ◽  
High Concentration ◽  
Phenolic Resins ◽  
Oh Groups ◽  
Molecular Weights ◽  
Reed Straw ◽  
Organosolv Lignin

Organosolv lignins were extracted from corn stover, wheat, rice straw, reed straw, and sugarcane bagasse using a mixture of acetic and formic acids, at relatively low temperature and atmospheric pressure. Lignin content, residual carbohydrates, ash levels, proteins, and molecular weights were determined in each extracted lignin. The lignin content of all samples was relatively high, confirming the performance of the pretreatment process. The low molecular weights were in a narrow range, in accordance with the organosolv lignin molar masses. However, some differences between studied lignins were highlighted, in particular in rice straw lignin, which contained the highest silica, calcium, and nitrogen contents. Nuclear magnetic resonance spectroscopies (31P and semi-quantitative Heteronuclear Single Quantum Correlation) underlined the structural similarities and differences between these organosolv lignins. Corn stover and sugarcane bagasse lignins were rich in non-methoxylated (H-Unit) or mono-methoxylated (G-Unit) phenolic units, making them the best promising candidates for production of phenolic resins. Wheat straw lignin was richer in aliphatic OH than in phenolic OH. This is an advantage for use as polyol substitute in polyurethane synthesis. Reed straw lignin was less specific, with a balanced content of OH groups. However, it contained a high concentration of β-O-4 linkages, which is favorable for depolymerization.

Facile Preparation of the Single Crystalline In2S3 Nanosheets with Highly Efficient Photocatalytic Activity

2013 ◽  
Vol 834-836 ◽  
pp. 8-11
Author(s):  
Hao Yong Yin ◽  
Jun Hong Tang ◽  
Chun Jie Yan ◽  
Qiu Lin Nie ◽  
Dan Wu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Organic Pollutants ◽  
Hydrothermal Process ◽  
Photocatalytic Decomposition ◽  
Single Crystalline ◽  
Highly Efficient ◽  
Sem And Tem ◽  
Facile Preparation ◽  
Facile Hydrothermal Process

The single crystalline In2S3 nanosheets with highly efficient photocatalytic activity have been controllably synthesized via a facile hydrothermal process without adding any surfactant. The morphologies of the nanosheets were characterized by SEM and TEM. The results show the diameter of the nanosheets ranges from 100nm to 400nm. The photocatalytic decomposition of methyl orange on the catalyst shows it has much higher photoactivity than that of nanoTiO2 which means it may be more capable to be used as photocatalyst in decomposition of organic pollutants.

Nano-MnO x on activated carbon prepared by hydrothermal process for fast and highly efficient degradation of azo dyes

2014 ◽  
Vol 485 ◽  
pp. 91-98 ◽  
Author(s):  
Lili Xu ◽  
Xingfa Li ◽  
Jianqing Ma ◽  
Yuezhong Wen ◽  
Weiping Liu
Keyword(s):  
Activated Carbon ◽  
Azo Dyes ◽  
Hydrothermal Process ◽  
Highly Efficient

Facile hydrothermal synthesis of a highly efficient solar active Pr6O11–ZnO photocatalyst and its multiple applications

RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 27642-27653 ◽  
Author(s):  
Subramanian Balachandran ◽  
Kuppulingam Thirumalai ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Azo Dye ◽  
Dye Degradation ◽  
Hydrothermal Process ◽  
Highly Efficient ◽  
Solar Photocatalytic Activity ◽  
Simple Hydrothermal Process

Heterostructrued Pr6O11–ZnO prepared by a simple hydrothermal process, shows enhanced solar photocatalytic activity for azo dye degradation, hydrophobicity and photoconductivity.

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