Microbial Nanobiotechnology in Nanocatalysis: Degradation …
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visible light-mediated photocatalytic efficiency producing phthalic acid and three
intermediates of N-deethylation as the degradation products. (Che et al. 2017). Also,
metal tolerance potential of soil fungus Cladosporium oxysporum AJP03 for effective
production of gold nanoparticles with excellent catalytic activity for rhodamine B
degradation within 7 min of reaction time under experimental conditions has been
reported (Bhargava et al. 2016). A newly isolated strain Trichoderma sp. WL-Go
was similarly utilized in the green synthesis of gold nanoparticles (AuNPs) which
greatly improved the decolorization rate of several azo dyes (Qu et al. 2017).
For the methylene blue degradation, biosynthesized PbS nanocrystals in the shape
of nanoparticles, nanocuboids, and nanosheets have been studied. According to the
study, in the presence of H2O2, PbS acts as an oxidizer and an electron capture agent.
The results suggested that nanocuboids had the highest dye degradation efficiency,
although they had the lowest specific surface area. The researchers revealed the
possibility that the high levels of catalytic activity of PbS nanocuboids could have
been influenced by the crystal plane (Yue et al. 2016). A recent study found that
the Cordyceps militaris zinc oxide nanoparticles, in the presence of UV radiation,
has the ability to degrade hazardous dye methylene blue approximately 97%. This
study underscores the potential of using C. militaris zinc oxide nanoparticles as ideal
photo catalyst for the safeguard of the environment from hazardous effects of water
pollution (Li et al. 2019).
In a study aimed to synthesize safe, cost-effective, and novel silver nanoparticles without using any synthetic capping and reducing agents, silver nanoparticles synthesized from endophytic fungal extract of Pestalotiopsis versicolor (Speg.)
Steyaert showed strong antibacterial activity against both gram-positive and gramnegative bacteria and also exhibited good azo dye degrading potential against
Orange G, rhodamine B, and Congo red (Rajput et al. 2017). A recent study found
that the Bacillus pumillis silver nanoparticles showed great potential to improve
bioremediation for Congo red dye removal up to 13% (Modi et al. 2015).
In a study aimed to investigate the green biosynthesis of silver–gold and gold alloy
nanoparticles via cell-free extract of Bacillus safensis LAU 13 strain, researchers
found that gold and silver–gold alloy nanoparticles exhibited significant degradation
(more than 90%) of malachite green after 48 h (Ojo et al. 2016). Silver nanoparticles synthesized from xylanases of Trichoderma longibrachiatum L2 (TEA) and
Aspergillus niger L3 (NEA) were also able to degrade malachite green (78.97%) and
methylene blue (25.30%) (Elegbede et al. 2018). Silver–gold alloy nanoparticles,
which were synthesized from xylanases of Aspergillus niger L3 (NE) and Trichoderma longibrachiatum L2 (TE), were found to degrade malachite green (91.39%)
and methylene blue (47.10%) (Elegbede et al. 2019).
385
visible light-mediated photocatalytic efficiency producing phthalic acid and three
intermediates of N-deethylation as the degradation products. (Che et al. 2017). Also,
metal tolerance potential of soil fungus Cladosporium oxysporum AJP03 for effective
production of gold nanoparticles with excellent catalytic activity for rhodamine B
degradation within 7 min of reaction time under experimental conditions has been
reported (Bhargava et al. 2016). A newly isolated strain Trichoderma sp. WL-Go
was similarly utilized in the green synthesis of gold nanoparticles (AuNPs) which
greatly improved the decolorization rate of several azo dyes (Qu et al. 2017).
For the methylene blue degradation, biosynthesized PbS nanocrystals in the shape
of nanoparticles, nanocuboids, and nanosheets have been studied. According to the
study, in the presence of H2O2, PbS acts as an oxidizer and an electron capture agent.
The results suggested that nanocuboids had the highest dye degradation efficiency,
although they had the lowest specific surface area. The researchers revealed the
possibility that the high levels of catalytic activity of PbS nanocuboids could have
been influenced by the crystal plane (Yue et al. 2016). A recent study found that
the Cordyceps militaris zinc oxide nanoparticles, in the presence of UV radiation,
has the ability to degrade hazardous dye methylene blue approximately 97%. This
study underscores the potential of using C. militaris zinc oxide nanoparticles as ideal
photo catalyst for the safeguard of the environment from hazardous effects of water
pollution (Li et al. 2019).
In a study aimed to synthesize safe, cost-effective, and novel silver nanoparticles without using any synthetic capping and reducing agents, silver nanoparticles synthesized from endophytic fungal extract of Pestalotiopsis versicolor (Speg.)
Steyaert showed strong antibacterial activity against both gram-positive and gramnegative bacteria and also exhibited good azo dye degrading potential against
Orange G, rhodamine B, and Congo red (Rajput et al. 2017). A recent study found
that the Bacillus pumillis silver nanoparticles showed great potential to improve
bioremediation for Congo red dye removal up to 13% (Modi et al. 2015).
In a study aimed to investigate the green biosynthesis of silver–gold and gold alloy
nanoparticles via cell-free extract of Bacillus safensis LAU 13 strain, researchers
found that gold and silver–gold alloy nanoparticles exhibited significant degradation
(more than 90%) of malachite green after 48 h (Ojo et al. 2016). Silver nanoparticles synthesized from xylanases of Trichoderma longibrachiatum L2 (TEA) and
Aspergillus niger L3 (NEA) were also able to degrade malachite green (78.97%) and
methylene blue (25.30%) (Elegbede et al. 2018). Silver–gold alloy nanoparticles,
which were synthesized from xylanases of Aspergillus niger L3 (NE) and Trichoderma longibrachiatum L2 (TE), were found to degrade malachite green (91.39%)
and methylene blue (47.10%) (Elegbede et al. 2019).