Halloysite nanotube@carbon with rich carboxyl groups as a multifunctional adsorbent for the efficient removal of cationic Pb(ii), anionic Cr(vi) and methylene blue (MB)

2018 ◽  
Vol 5 (10) ◽  
pp. 2257-2268 ◽  
Author(s):  
Penglei Wang ◽  
Yuanyuan Tang ◽  
Yunsong Liu ◽  
Tao Wang ◽  
Pengfei Wu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Carboxyl Groups ◽  
Carboxyl Group ◽  
Efficient Removal ◽  
Green Method ◽  
Halloysite Nanotube ◽  
Adsorption Performance

A multifunctional halloysite@carbon with rich carboxyl group (HNT@CRC) is prepared using a facile and green method, and the adsorbent exhibits excellent adsorption performance towards pollutants with different features like Pb(ii), Cr(vi) and methylene blue (MB).

scholarly journals Hydrogenation of benzoic acid derivatives over Pt/TiO2 under mild conditions

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Miao Guo ◽  
Xiangtao Kong ◽  
Chunzhi Li ◽  
Qihua Yang
Keyword(s):  
Electron Transfer ◽  
Benzoic Acid ◽  
High Efficiency ◽  
Carboxyl Groups ◽  
Carboxyl Group ◽  
Benzoic Acids ◽  
Catalyst Poisoning ◽  
Benzoic Acid Derivatives ◽  
Mild Conditions ◽  
Transfer Direction

AbstractHydrogenation of benzoic acid (BA) to cyclohexanecarboxylic acid (CCA) has important industrial and academic significance, however, the electron deficient aromatic ring and catalyst poisoning by carboxyl groups make BA hydrogenation a challenging transformation. Herein, we report that Pt/TiO2 is very effective for BA hydrogenation with, to our knowledge, a record TOF of 4490 h−1 at 80 °C and 50 bar H2, one order higher than previously reported results. Pt/TiO2 catalysts with electron-deficient and electron-enriched Pt sites are obtained by modifying the electron transfer direction between Pt and TiO2. Electron-deficient Pt sites interact with BA more strongly than electron-rich Pt sites, helping the dissociated H of the carboxyl group to participate in BA hydrogenation, thus enhancing its activity. The wide substrate scope, including bi- and tri-benzoic acids, further demonstrates the high efficiency of Pt/TiO2 for hydrogenation of BA derivatives.

Facile Synthesis of Boron Organic Polymers for Efficient Removal and Separation of Methylene Blue, Rhodamine B, and Rhodamine 6G

2018 ◽  
Vol 6 (12) ◽  
pp. 16777-16787 ◽  
Author(s):  
Xue Zhao ◽  
Dan Wang ◽  
Changjun Xiang ◽  
Fulin Zhang ◽  
Luchang Liu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Rhodamine B ◽  
Rhodamine 6G ◽  
Organic Polymers ◽  
Efficient Removal ◽  
Facile Synthesis
Sign in / Sign up

Export Citation Format

Share Document