scholarly journals Exploring hierarchical porous silica-supported Ag3PO4 as high-efficient and environmental-friendly photocatalytic disinfectant

2021 ◽  
Author(s):  
Pei Zheng ◽  
Bo Jin ◽  
Sheng Dai
Keyword(s):  
Visible Light ◽  
High Performance ◽  
High Surface ◽  
Porous Silica ◽  
Photo Oxidation ◽  
Surface Areas ◽  
Environmental Friendly ◽  
Hierarchical Porous ◽  
High Efficient ◽  
Silver Release

Abstract Silver orthophosphate (Ag3PO4) is an attractive photocatalytic catalyst for disinfection and degradation, but its instability arising from silver release generates significant environmental issue. Aiming to develop a highly efficient and environmental-friendly catalyst, we synthesized Ag3PO4 nanoparticle incorporated hierarchical porous silica (Ag3PO4@h-SiO2) as a novel high-performance photocatalytic catalyst without observed silver release. Brain-like hierarchical porous SiO2 (h-SiO2) brings a scaffold support with high surface areas, and the h-SiO2 surface modified thiols are able to anchor in situ formed 10 nm Ag3PO4 to eliminate silver release. Systematic investigations revealed that because of its structural advantages, Ag3PO4@h-SiO2 show excellent disinfection and degradation ability under visible-light irradiation and stable characteristics without obviously observed silver leaching during photo-oxidation operation. In-depth scavenger study reveals Ag3PO4@h-SiO2 as an effective semiconducting photocatalyst stimulates the production of photo-generated reactive species, which dominate its distinguished disinfection performance via photo-oxidation. Graphical abstract Ag3PO4 are anchored to thiol modified hierarchical porous SiO2 to produce a visible-light responsive photocatalyst of Ag3PO4@h-SiO2. The enhanced catalytic sites and surface areas promote pathogen disinfection, and the structure advantages minimize silver release to environment. Both H2O2 and holes being generated in photocatalysis dominate overall disinfection activity.

Enhanced visible-light photocatalytic hydrogen production activity of three-dimensional mesoporous p-CuS/n-CdS nanocrystal assemblies

2017 ◽  
Vol 4 (3) ◽  
pp. 433-441 ◽  
Author(s):  
Ioannis Vamvasakis ◽  
Adelais Trapali ◽  
Jianwei Miao ◽  
Bin Liu ◽  
Gerasimos S. Armatas
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
High Performance ◽  
Hydrogen Generation ◽  
High Surface ◽  
Three Dimensional ◽  
Surface Areas ◽  
Photocatalytic Hydrogen Generation ◽  
Production Activity ◽  
Visible Light Photocatalytic

Mesoporous assemblies of p-CuS/n-CdS nanocrystal junctions with high surface areas and uniform pores demonstrate a high performance and stability in photocatalytic hydrogen generation from water using visible light.

scholarly journals Characterization of Vapor Deposited, NanoStructured Membranes

2004 ◽  
Vol 822 ◽  
Author(s):  
Alan F. Jankowski ◽  
Nerine J. Cherepy ◽  
James. L. Ferreira ◽  
Jeffrey P. Hayes
Keyword(s):  
Electron Beam ◽  
Fuel Cells ◽  
High Performance ◽  
High Surface ◽  
Electron Beam Evaporation ◽  
Zinc Alloy ◽  
Molten Carbonate ◽  
Surface Areas ◽  
Copper Zinc ◽  
Nanostructured Membranes

AbstractThe vapor deposition methods of planar magnetron sputtering and electron-beam evaporation are used to synthesize materials with nanostructured morphological features that have ultra-high surface areas with continuous open porosity at the nanoscale. These nanostructured membranes are used in a variety of fuel cells to provide electrode and catalytic functions. Specifically, stand alone and composite nickel electrodes for use in thin film solid-oxide, and molten carbonate fuel cells are formed by sputter deposition and electron beam evaporation, respectively. Also, a potentially high-performance catalyst material for the direct reformation of hydrocarbon fuels at low temperatures is deposited as a nanostructure by the reactive sputtering of a copper-zinc alloy using a partial pressure of oxygen at an elevated substrate temperature.

Double-walled hierarchical porous silica nanotubes loaded Au nanoparticles in the interlayer as a high-performance catalyst

2019 ◽  
Vol 31 (1) ◽  
pp. 015701 ◽  
Author(s):  
Lingbo Kong ◽  
Yingchun Guo ◽  
Xiaomei Wang ◽  
Xu Zhang
Keyword(s):  
High Performance ◽  
Au Nanoparticles ◽  
Porous Silica ◽  
Silica Nanotubes ◽  
Hierarchical Porous

Highly accessible hierarchical porous carbon from a bi-functional ionic liquid bulky gel: high-performance electrochemical double layer capacitors

2019 ◽  
Vol 7 (44) ◽  
pp. 25297-25304 ◽  
Author(s):  
Yang Yan ◽  
Xiao-Feng Hao ◽  
Li-guo Gao ◽  
Si-si Lin ◽  
Nan Cui ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Porous Carbon ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
Liquid Electrolyte ◽  
Hierarchical Porous Carbon ◽  
Ionic Liquid Electrolyte ◽  
Hierarchical Porous ◽  
Electrochemical Double Layer

The graphene-based hierarchical porous carbon GGI has high surface area, dual-doping, micro/meso-pores and exhibits good compatibility with the ionic liquid electrolyte EmimTFSI.

Powdery polymer and carbon aerogels with high surface areas for high-performance solid phase microextraction coatings

Nanoscale ◽  
2017 ◽  
Vol 9 (17) ◽  
pp. 5545-5550 ◽  
Author(s):  
Juan Zheng ◽  
Junlong Huang ◽  
Fei Xu ◽  
Fang Zhu ◽  
Dingcai Wu ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
High Performance ◽  
Solid Phase ◽  
High Surface ◽  
Carbon Aerogels ◽  
Surface Areas

High performance microspherical activated carbons for methane storage and landfill gas or biogas upgrade

2014 ◽  
Vol 2 (37) ◽  
pp. 15337-15344 ◽  
Author(s):  
Ana S. Mestre ◽  
Cristina Freire ◽  
João Pires ◽  
Ana P. Carvalho ◽  
Moisés L. Pinto
Keyword(s):  
Packing Density ◽  
High Performance ◽  
Activated Carbons ◽  
High Surface ◽  
Landfill Gas ◽  
Methane Storage ◽  
Surface Areas

Microspherical K2CO3-activated carbons for methane storage or biogas upgrade: high surface areas and packing density, tuneable microporosity, and CO2–CH4 selectivity.

The simple preparation of a hierarchical porous carbon with high surface area for high performance supercapacitors

Carbon ◽  
2013 ◽  
Vol 60 ◽  
pp. 565
Author(s):  
Dong-fang Zheng ◽  
Meng-qiu Jia ◽  
Bin Xu ◽  
Hao Zhang ◽  
Gao-ping Cao ◽  
...  
Keyword(s):  
Surface Area ◽  
Porous Carbon ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
Hierarchical Porous Carbon ◽  
Simple Preparation ◽  
Hierarchical Porous

From Flexible to Hard Polyurethane Aerogels: The Effect of Molecular Functionality vs. Molecular Rigidity

2012 ◽  
Vol 1403 ◽  
Author(s):  
Chakkaravarthy Chidambareswarapattar ◽  
Jared M. Loebs ◽  
Zachary J. Larimore ◽  
Patrick M. McCarver ◽  
Autumn M. Kosbar ◽  
...  
Keyword(s):  
High Performance ◽  
High Surface ◽  
Monomer Concentration ◽  
Design Rule ◽  
Dibutyltin Dilaurate ◽  
Surface Areas ◽  
Hyperbranched Polyurethane ◽  
Solid Nmr ◽  
Molecular Rigidity ◽  
Highly Porous

ABSTRACTHigh performance all-polymer aerogels are not only interesting for their low thermal conductivity, but also for their mechanical strength and their conversion to porous carbons. The prevalent design rule dictates that crosslinking at the monomer level decreases solubility of the developing polymer and induces phase separation of nanoparticles with high surface to volume ratios. Hence, hyperbranched structures based on trifunctional single aromatic core monomers should have enhanced interparticle connectivity and rigidity compared to those based on either difunctional or multiple aromatic core monomers. That design rule is applied here to hyperbranched polyurethane (PU) aerogels synthesized from tris(4-isocyanatophenyl)methane (TIPM) and 1,1,1-tris(4-hydroxyphenyl)ethane (HPE) in anhydrous acetone using dibutyltin dilaurate (DBTDL) as catalyst. The resulting materials vary from highly flexible to rigid as the monomer concentration increases. FTIR and 13C solid NMR confirm formation of urethane. SEM shows that the flexible variety is macroporous with a beaded worm-like structure, while the rigid variety is mesoporous and nanoparticulate. Lower-density flexible aerogels are highly porous (92%) with surface area of 132 m2 g-1, while the rigid ones have higher surface areas, up to 256 m2 g-1. Polyurethane aerogels from other triols and diols, e.g., phloroglucinol (POL) and resorcinol (RES), respectively, have also been studied and for similar monomer concentrations shrinkage and bulk density increases.

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