Highly efficient and selective photocatalytic CO2 reduction based on water-soluble CdS QDs modified by the mixed ligands in one pot

2020 ◽  
Vol 10 (9) ◽  
pp. 2821-2829 ◽  
Author(s):  
Hong-Yan Wang ◽  
Rong Hu ◽  
You-Jia Lei ◽  
Zhi-Yu Jia ◽  
Gui-Lin Hu ◽  
...  
Keyword(s):  
Noble Metal ◽  
Water Solubility ◽  
High Selectivity ◽  
High Efficiency ◽  
Co2 Reduction ◽  
Water Soluble ◽  
One Pot ◽  
Metal Free ◽  
Mixed Ligands ◽  
Cds Qds

The noble metal-free photocatalysts with good water solubility, high efficiency and high selectivity to promote CO2 conversion.

Noble-Metal-Free Heterojunction Photocatalyst for Selective CO2 Reduction to Methane upon Induced Strain Relaxation

ACS Catalysis ◽  
2021 ◽  
pp. 687-697
Author(s):  
Risov Das ◽  
Shreya Sarkar ◽  
Ritesh Kumar ◽  
Seethiraju D. Ramarao ◽  
Arjun Cherevotan ◽  
...  
Keyword(s):  
Noble Metal ◽  
Strain Relaxation ◽  
Co2 Reduction ◽  
Metal Free

Metal-free graphdiyne doped with sp-hybridized boron and nitrogen atoms at acetylenic sites for high-efficiency electroreduction of CO2 to CH4 and C2H4

2019 ◽  
Vol 7 (8) ◽  
pp. 4026-4035 ◽  
Author(s):  
Jia Zhao ◽  
Zhe Chen ◽  
Jingxiang Zhao
Keyword(s):  
High Selectivity ◽  
High Efficiency ◽  
Metal Free

By carefully controlling the kinds and sites of the B or N dopant, graphdiyne can be utilized as a metal-free electrocatalyst with high-efficiency and high selectivity for CO2 reduction to C1 and C2 products.

Azobenzene-Functionalised Core Cross-Linked Star Polymers and their Host–Guest Interactions

2014 ◽  
Vol 67 (1) ◽  
pp. 173 ◽  
Author(s):  
Shereen Tan ◽  
Edgar H. H. Wong ◽  
Qiang Fu ◽  
Jing M. Ren ◽  
Adrian Sulistio ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Benzoic Acid ◽  
Water Solubility ◽  
Star Polymers ◽  
Water Soluble ◽  
Hydroxyl Groups ◽  
Single Electron Transfer ◽  
One Pot ◽  
Radical Polymerisation ◽  
Soluble Poly

Water-soluble poly(2-hydroxyethyl acrylate) (PHEA)-based core cross-linked star polymers were efficiently synthesised with high macroinitiator-to-star-conversion (>95 %) in a one-pot system via single electron transfer-living radical polymerisation. The star polymers display excellent water solubility and the pendant hydroxyl groups provide a platform for facile post-functionalisation with various molecules. In demonstrating this, a photo-isomerisable molecule, 4-(phenylazo)benzoic acid was conjugated onto the preformed stars through partial esterification of the available hydroxyl groups (5–20 %). The azobenzene functionalised stars were subsequently employed to form reversible inclusion complexes with α-cyclodextrin.

scholarly journals Photocatalytic hydrogen production from a noble metal free system based on a water soluble porphyrin derivative and a cobaloxime catalyst

2014 ◽  
Vol 50 (5) ◽  
pp. 521-523 ◽  
Author(s):  
Theodore Lazarides ◽  
Milan Delor ◽  
Igor V. Sazanovich ◽  
Theresa M. McCormick ◽  
Irene Georgakaki ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Noble Metal ◽  
Water Soluble ◽  
Free System ◽  
Photocatalytic Hydrogen Production ◽  
Metal Free ◽  
Porphyrin Derivative ◽  
Water Soluble Porphyrin

scholarly journals One-Pot, Metal-Free Synthesis of Dimethyl Carbonate from CO2 at Room Temperature

2020 ◽  
Vol 1 (3) ◽  
pp. 298-314
Author(s):  
Santosh Govind Khokarale ◽  
Thai Q. Bui ◽  
Jyri-Pekka Mikkola
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Dimethyl Carbonate ◽  
High Selectivity ◽  
Chemical Species ◽  
Side Reactions ◽  
Ambient Conditions ◽  
Reaction Conditions ◽  
One Pot ◽  
Metal Free

Herein, we report on the metal-free, one-pot synthesis of industrially important dimethyl carbonate (DMC) from molecular CO2 under ambient conditions. In this process, initially the CO2 was chemisorbed through the formation of a switchable ionic liquid (SIL), [DBUH] [CH3CO3], by the interaction of CO2 with an equivalent mixture of organic superbase 1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU) and methanol. The obtained SIL further reacted with methyl iodide (CH3I) to form DMC. The synthesis was carried out in both dimethyl sulfoxide (DMSO) and methanol. Methanol is preferred, as it not only served as a reagent and solvent in CO2 capture and DMC synthesis, but it also assisted in controlling the side reactions between chemical species such as CH3I and [DBUH]+ cation and increased the yield of DMC. Hence, the use of methanol avoided the loss of captured CO2 and favored the formation of DMC with high selectivity. Under the applied reaction conditions, 89% of the captured CO2 was converted to DMC. DBU was obtained, achieving 86% recovery of its salts formed during the synthesis. Most importantly, in this report we describe a simple and renewable solvent-based process for a metal-free approach to DMC synthesis under industrially feasible reaction conditions.

scholarly journals Facile Synthesis of Amorphous C3N4ZnxOy (x, y = 0.32–1.10) with High Photocatalytic Efficiency for Antibiotic Degradation

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 514
Author(s):  
Ran Zhang ◽  
Jing Xian Dong ◽  
Guo Liang Gao ◽  
Xue Lu Wang ◽  
Ye-Feng Yao
Keyword(s):  
Noble Metal ◽  
Amorphous Materials ◽  
High Efficiency ◽  
Amorphous State ◽  
Amorphous Structure ◽  
Photocatalytic Efficiency ◽  
Metal Free ◽  
Synthetic Strategy ◽  
Photocatalytic Reactions ◽  
Antibiotic Degradation

The development of novel, noble metal-free semiconductor catalysts with high efficiency is of great importance for the degradation of organic compounds. Among them, amorphous materials have been extensively studied for their unique and commercially useful properties. Here, a completely amorphous, noble metal-free photocatalyst C3N4ZnxOy (x, y = 0.32–1.10) was successfully synthesized from urea and ZnO by a simple high-temperature polymerization method. As the Zn content increased, the short-range ordered structures of the amorphous samples were still retained, as revealed by XPS, FTIR, and ssNMR. Meanwhile, the -CN3 structures were observed to be gradually destroyed, which may make the amorphous state more favorable for photocatalytic reactions. Compared with g-C3N4, the amorphous samples showed significantly reduced intensities in the photoluminescence spectra, indicating that the recombination rate of the photo-generated charge carriers was greatly reduced. It was confirmed that the optimized sample (C3N4Zn0.61O0.61) achieved a photocatalytic efficiency of 86.1% in the degradation of tetracycline hydrochloride under visible light irradiation within 1 h. This is about 2 times higher than that of both g-C3N4 and ZnO. This study emphasizes the importance of the amorphous structure in photocatalytic reactions, and this synthetic strategy may provide an effective model for designing other novel catalysts.

ZnO nanorods modified with noble metal-free Co3O4 nanoparticles as a photocatalyst for efficient ethylene degradation under light irradiation

2019 ◽  
Vol 9 (21) ◽  
pp. 6191-6198 ◽  
Author(s):  
Zihao Cui ◽  
Xiaolei Liu ◽  
Xizhuang Liang ◽  
Peng Wang ◽  
Qianqian Zhang ◽  
...  
Keyword(s):  
Noble Metal ◽  
High Efficiency ◽  
Zno Nanorods ◽  
Light Irradiation ◽  
Good Stability ◽  
Co3o4 Nanoparticles ◽  
Simple Method ◽  
Metal Free

ZnO modified with noble metal-free Co3O4 nanoparticles was prepared by a simple method and showed good stability and high efficiency for photo-oxidizing ethylene.

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