Bioinspired Metal-Free Fluorescent Carbon Nanozyme with Dual Catalytic Activity to Confront Cellular Oxidative Damage

2021 ◽  
Author(s):  
Ashish K. Shukla ◽  
Chandni Sharma ◽  
Amitabha Acharya
Keyword(s):  
Catalytic Activity ◽  
Oxidative Damage ◽  
Metal Free ◽  
Fluorescent Carbon

Converting chicken manure into highly active N–P co-doped metal-free biocarbon electrocatalysts: effect of chemical treatment on their catalytic activity for the ORR

2019 ◽  
Vol 3 (5) ◽  
pp. 1307-1316 ◽  
Author(s):  
I. L. Alonso-Lemus ◽  
M. Z. Figueroa-Torres ◽  
D. Lardizabal-Gutíerrez ◽  
P. Bartolo-Pérez ◽  
J. C. Carrillo-Rodríguez ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Chemical Treatment ◽  
Raw Material ◽  
Chicken Manure ◽  
Metal Free ◽  
Highly Active ◽  
Co Doped

In this work, the use of chicken manure as the raw material for obtaining metal-free biocarbons as electrocatalysts was studied.

Enhancement mechanism of sulfur dopants on the catalytic activity of N and P co-doped three-dimensional hierarchically porous carbon as a metal-free oxygen reduction electrocatalyst

2019 ◽  
Vol 9 (21) ◽  
pp. 5906-5914 ◽  
Author(s):  
Yongxi Zan ◽  
Zhengping Zhang ◽  
Meiling Dou ◽  
Feng Wang
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Three Dimensional ◽  
Nitrogen And Phosphorus ◽  
Free Oxygen ◽  
Hierarchically Porous ◽  
Metal Free ◽  
Enhancement Mechanism ◽  
Co Doped

A sulfur, nitrogen and phosphorus ternary-doped cattle-bone-derived hierarchically porous carbon metal-free electrocatalyst was synthesized, exhibiting superior oxygen reduction performance compared to Pt/C.

Metal-free graphene-based catalyst—Insight into the catalytic activity: A short review

2015 ◽  
Vol 492 ◽  
pp. 1-9 ◽  
Author(s):  
Huawen Hu ◽  
John H. Xin ◽  
Hong Hu ◽  
Xiaowen Wang ◽  
Yeeyee Kong
Keyword(s):  
Catalytic Activity ◽  
Short Review ◽  
Metal Free ◽  
Free Graphene ◽  
Insight Into

A nitrogen and boron co-doped metal-free carbon electrocatalyst for an efficient oxygen reduction reaction

2018 ◽  
Vol 5 (11) ◽  
pp. 2985-2991 ◽  
Author(s):  
Yunjie Zhou ◽  
Yue Sun ◽  
Huibo Wang ◽  
Cheng Zhu ◽  
Jin Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Material ◽  
Reduction Reaction ◽  
Free Carbon ◽  
Metal Free ◽  
Co Doped

A N, B co-doped carbon material exhibits excellent catalytic activity for an oxygen reduction reaction.

Noble-metal-free NiFe nanoparticles immobilized on nano CeZrO2 solid solutions for highly efficient hydrogen production from hydrous hydrazine

2019 ◽  
Vol 3 (11) ◽  
pp. 3071-3077 ◽  
Author(s):  
Hongtao Zou ◽  
Qilu Yao ◽  
Meiling Huang ◽  
Meihua Zhu ◽  
Fei Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Noble Metal ◽  
Solid Solutions ◽  
Reduction Method ◽  
Hydrogen Generation ◽  
High Catalytic Activity ◽  
Metal Free ◽  
Highly Efficient ◽  
Hydrazine Solution

Noble-metal-free NiFe nanoparticles were successfully immobilized on nano CeZrO2 solid solutions by a simple impregnation–reduction method, exhibiting a high catalytic activity and 100% H2 selectivity for hydrogen generation from hydrazine solution.

scholarly journals Harnessing inherently hierarchical microstructures of plant biomass to construct three-dimensional nanoporous nitrogen-doped carbons as efficient and durable oxygen reduction electrocatalysts

RSC Advances ◽  
2019 ◽  
Vol 9 (69) ◽  
pp. 40326-40335 ◽  
Author(s):  
Hongqu Tang ◽  
Shilin Wei ◽  
Chuangchuang Yang ◽  
Peiyao Bai ◽  
Jiawei Qi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Plant Biomass ◽  
Three Dimensional ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Nitrogen Doped Carbon ◽  
Carbon Based

Naturally hierarchical microstructures of E. tirucalli are utilized to prepare a nanoporous nitrogen-doped carbon-based metal-free ORR electrocatalyst that is superior to the benchmark Pt/C catalyst in catalytic activity and durability.

scholarly journals Insights into the promotion role of phosphorus doping on carbon as a metal-free catalyst for low-temperature selective catalytic reduction of NO with NH3

RSC Advances ◽  
2020 ◽  
Vol 10 (22) ◽  
pp. 12908-12919
Author(s):  
Weifeng Li ◽  
Shuangling Jin ◽  
Rui Zhang ◽  
Yabin Wei ◽  
Jiangcan Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
No Reduction ◽  
Catalytic Reduction ◽  
Carbon Aerogels ◽  
Phosphorus Doping ◽  
Reduction Of No ◽  
Metal Free

P species can effectively enhance the catalytic activity of carbon aerogels for NO reduction at low temperature.

Fabrication of a mesoporous Ba0.5Sr0.5Co0.8Fe0.2O3−δ perovskite as a low-cost and efficient catalyst for oxygen reduction

2017 ◽  
Vol 46 (40) ◽  
pp. 13903-13911 ◽  
Author(s):  
Xiangzhi Cui ◽  
Ryan O'Hayre ◽  
Svitlana Pylypenko ◽  
Linlin Zhang ◽  
Liming Zeng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Precious Metal ◽  
Oxygen Vacancies ◽  
Low Cost ◽  
Cathode Catalyst ◽  
Methanol Tolerance ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Redox Couples ◽  
Catalytic Stability

The redox couples Co4+/Co3+ and Fe3+/Fe2+, and oxygen vacancies in mesoporous Ba0.5Sr0.5Co0.8Fe0.2O3−δ endow the precious metal-free cathode catalyst with high ORR catalytic activity, and more importantly excellent methanol tolerance and electro-catalytic stability.

A bi-functional metal-free catalyst composed of dual-doped graphene and mesoporous carbon for rechargeable lithium–oxygen batteries

2015 ◽  
Vol 3 (36) ◽  
pp. 18456-18465 ◽  
Author(s):  
Jae-Hong Kim ◽  
Aravindaraj G. Kannan ◽  
Hyun-Sik Woo ◽  
Dae-Gun Jin ◽  
Wonkeun Kim ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
Metal Free ◽  
Doped Graphene ◽  
Lithium Oxygen Batteries ◽  
Co Doped

Nitrogen and sulfur co-doped graphene/mesoporous carbon exhibited high bi-functional catalytic activity toward oxygen reduction and evolution reactions.

Effects of substituted metal-free porphyrins in apo-horseradish peroxidase

2007 ◽  
Vol 11 (12) ◽  
pp. 836-845
Author(s):  
A. Molaei Rad ◽  
A. Akbar Moosavi-Movahedi ◽  
Hedayatollah Ghourchian ◽  
Nasser Safari ◽  
Jun Hong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Horseradish Peroxidase ◽  
Fluorescence Emission ◽  
Potassium Phosphate ◽  
Phosphate Solution ◽  
Metal Free ◽  
Catalytic Activities ◽  
Polar Environment ◽  
Free Metal ◽  
Steric Hindrances

The peroxidase-like catalytic activities of some synthetic porphyrins following substitution in apo-horseradish peroxidase (apo-HRP) were studied by UV-vis and fluorescence spectrophotometries in buffer potassium phosphate solution at pH 7. The insertion of these synthetic porphyrins in apo-HRP is very difficult, due to steric hindrances between coordinated metals in porphyrins and the side-chains of amino acids in native protein. However, because of planar coordination following insertion in an active site of apo-HRP tetrapyridylporphyrin(TPyP), a metal-free porphyrin, adsorbs free metal ions from the environment and shows higher peroxidase-like catalytic activity than other new synthetic porphyrins. The results indicate that the metal-free porphyrins with optimum Reinheitzahl (RZ) show higher catalytic activity relative to others. The fluorescence emission of TPyP only, and of apo-HRP-TPyP, displayed significantly different wavelengths for the maximum aromatic fluorescence intensity. The λmax for apo-HRP-TPyP was around 447 nm, while for TPyP, alone, it increased to 463 nm, which showed that the aromatic groups' surroundings changed upon substitution of porphyrins in a low polar environment.

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