High surface area Nanoflakes of P-gC3N4 photocatalyst loaded with Ag nanoparticle with intraplanar and interplanar charge separation for environmental remediation

Nanostructures exhibit numerous merits to improve the efficiency in solar-to-energy conversion. These include shortened carrier collection pathways, an increased volume ratio between depletion layer and bulk, enhanced light capture due to multiple light scattering in nanostructures, and a high surface area for photochemical conversion reactions. In this study, we describe the synthesis of morphology-controlled W-doped BiVO4 by simply tuning the solvent ratio in precursor solutions. Planar and porous W-doped BiVO4 thin films were prepared and compared. The porous film, which exhibits increased surface area and enhanced light absorption, has displayed enhanced charge separation and interfacial charge injection. Our quantitative analysis showed an enhancement of about 50% of the photoelectrochemical performance for the porous structure compared to the planar structure. This enhancement is attributed to improved light absorption (13% increase), charge separation (14% increase), and interfacial charge injection (20% increase).

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Carbon Nanomaterials for the Treatment of Heavy Metal-Contaminated Water and Environmental Remediation

Nanoscale Research Letters ◽

10.1186/s11671-019-3167-8 ◽

2019 ◽

Vol 14 (1) ◽

Cited By ~ 18

Author(s):

Rabia Baby ◽

Bullo Saifullah ◽

Mohd Zobir Hussein

Keyword(s):

Heavy Metal ◽

Surface Area ◽

Environmental Remediation ◽

Carbon Nanomaterials ◽

Heavy Metal Contamination ◽

High Surface ◽

High Surface Area ◽

Contaminated Water ◽

Removal Of Heavy Metals ◽

Carbon Based Nanomaterials

Abstract Nanotechnology is an advanced field of science having the ability to solve the variety of environmental challenges by controlling the size and shape of the materials at a nanoscale. Carbon nanomaterials are unique because of their nontoxic nature, high surface area, easier biodegradation, and particularly useful environmental remediation. Heavy metal contamination in water is a major problem and poses a great risk to human health. Carbon nanomaterials are getting more and more attention due to their superior physicochemical properties that can be exploited for advanced treatment of heavy metal-contaminated water. Carbon nanomaterials namely carbon nanotubes, fullerenes, graphene, graphene oxide, and activated carbon have great potential for removal of heavy metals from water because of their large surface area, nanoscale size, and availability of different functionalities and they are easier to be chemically modified and recycled. In this article, we have reviewed the recent advancements in the applications of these carbon nanomaterials in the treatment of heavy metal-contaminated water and have also highlighted their application in environmental remediation. Toxicological aspects of carbon-based nanomaterials have also been discussed.

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Facile synthesis and enhanced photocatalytic activity of Ag–SnS nanocomposites

New Journal of Chemistry ◽

10.1039/d0nj01225d ◽

2020 ◽

Vol 44 (27) ◽

pp. 11684-11693 ◽

Cited By ~ 1

Author(s):

Chandini Behera ◽

Surya Prakash Ghosh ◽

Jyoti P. Kar ◽

Saroj L Samal

Keyword(s):

Photocatalytic Activity ◽

Synergistic Effect ◽

Surface Area ◽

Charge Separation ◽

High Surface ◽

High Surface Area ◽

Photon Absorption ◽

Facile Synthesis ◽

Efficient Charge

The enhanced photocatatlytic properties of Ag–SnS nanocomposites are considered to be due to the synergistic effect of high surface area, broad range of photon absorption and efficient charge separation.

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GRAPHENE FOR ENVIRONMENTAL AND BIOLOGICAL APPLICATIONS

International Journal of Modern Physics B ◽

10.1142/s0217979212420015 ◽

2012 ◽

Vol 26 (21) ◽

pp. 1242001 ◽

Cited By ~ 35

Author(s):

T. S. SREEPRASAD ◽

T. PRADEEP

Keyword(s):

Graphene Oxide ◽

Surface Area ◽

Self Assembly ◽

Environmental Remediation ◽

High Surface ◽

High Surface Area ◽

Quantum Hall ◽

Pollutant Removal ◽

Limiting Factor ◽

Electronic Conductance

The latest addition to the nanocarbon family, graphene, has been proclaimed to be the material of the century. Its peculiar band structure, extraordinary thermal and electronic conductance and room temperature quantum Hall effect have all been used for various applications in diverse fields ranging from catalysis to electronics. The difficulty to synthesize graphene in bulk quantities was a limiting factor of it being utilized in several fields. Advent of chemical processes and self-assembly approaches for the synthesis of graphene analogues have opened-up new avenues for graphene based materials. The high surface area and rich abundance of functional groups present make chemically synthesized graphene (generally known as graphene oxide (GO) and reduced graphene oxide (RGO) or chemically converted graphene) an attracting candidate in biotechnology and environmental remediation. By functionalizing graphene with specific molecules, the properties of graphene can be tuned to suite applications such as sensing, drug delivery or cellular imaging. Graphene with its high surface area can act as a good adsorbent for pollutant removal. Graphene either alone or in combination with other materials can be used for the degradation or removal of a large variety of contaminants through several methods. In this review some of the relevant efforts undertaken to utilize graphene in biology, sensing and water purification are described. Most recent efforts have been given precedence over older works, although certain specific important examples of the past are also mentioned.

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Heterogeneous Photocatalysis over High-Surface-Area Silica-Supported Silver Halide Photocatalysts for Environmental Remediation

ACS Symposium Series - Nanoscale Materials in Chemistry: Environmental Applications ◽

10.1021/bk-2010-1045.ch011 ◽

2010 ◽

pp. 191-205 ◽

Cited By ~ 5

Author(s):

Dambar B. Hamal ◽

Kenneth J. Klabunde

Keyword(s):

Surface Area ◽

Environmental Remediation ◽

Silver Halide ◽

High Surface ◽

High Surface Area ◽

Heterogeneous Photocatalysis

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Tenacious Mass Transfer Limitations Drive Catalytic Selectivity during Electrochemical Carbon Dioxide Reduction

10.26434/chemrxiv.7770338.v1 ◽

2019 ◽

Cited By ~ 1

Author(s):

Kailun Yang ◽

Recep Kas ◽

Wilson A. Smith

Keyword(s):

Surface Area ◽

High Surface ◽

High Surface Area ◽

Catalyst Layer ◽

Active Surface ◽

Active Surface Area ◽

High Concentration ◽

Copper Electrodes ◽

Surface Enhanced ◽

Local Current

This study evaluated the performance of the commonly used strong buffer electrolytes, i.e. phosphate buffers, during CO2 electroreduction in neutral pH conditions by using in-situ surface enhanced infrared absorption spectroscopy (SEIRAS). Unfortunately, the buffers break down a lot faster than anticipated which has serious implications on many studies in the literature such as selectivity and kinetic analysis of the electrocatalysts. Increasing electrolyte concentration, surprisingly, did not extend the potential window of the phosphate buffers due to dramatic increase in hydrogen evolution reaction. Even high concentration phosphate buffers (1 M) break down within the potentials (-1 V vs RHE) where hydrocarbons are formed on copper electrodes. We have extended the discussion to high surface area electrodes by evaluating electrodes composed of copper nanowires. We would like highlight that it is not possible to cope with high local current densities on these high surface area electrodes by using high buffer capacity solutions and the CO2 electrocatalysts are needed to be evaluated by casting thin nanoparticle films onto inert substrates as commonly employed in fuel cell reactions and up to now scarcely employed in CO2 electroreduction. In addition, we underscore that normalization of the electrocatalytic activity to the electrochemical active surface area is not the ultimate solution due to concentration gradient along the catalyst layer.This will “underestimate” the activity of high surface electrocatalyst and the degree of underestimation will depend on the thickness, porosity and morphology of the catalyst layer.

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Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽

10.1039/c5nr02375k ◽

2015 ◽

Vol 7 (25) ◽

pp. 10974-10981 ◽

Cited By ~ 95

Author(s):

Xiulin Yang ◽

Ang-Yu Lu ◽

Yihan Zhu ◽

Shixiong Min ◽

Mohamed Nejib Hedhili ◽

...

Keyword(s):

Gas Phase ◽

Surface Area ◽

Hydrogen Evolution ◽

Hydrogen Generation ◽

High Surface ◽

High Surface Area ◽

Catalytic Efficiency ◽

Carbon Cloth ◽

Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

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