Fabrication of potato-like silver molybdate microstructures for photocatalytic degradation of chronic toxicity ciprofloxacin and highly selective electrochemical detection of H2O2
Abstract:In the present work, potato-like silver molybdate (Ag2MoO4) microstructures were synthesized through a simple hydrothermal method. The microstructures of Ag2MoO4 were characterized by various analytical and spectroscopic techniques such as XRD, FTIR, Raman, SEM, EDX and XPS. Interestingly, the as-prepared Ag2MoO4 showed excellent photocatalytic and electrocatalytic activity for the degradation of ciprofloxacin (CIP) and electrochemical detection of hydrogen peroxide (H2O2), respectively. The ultraviolet-visibl… Show more
“…Hydrogen peroxide (H 2 O 2 ), a reactive oxygen species (ROS) plays an essential role in organisms, which is produced by oxidase enzymes in mitochondria , and can freely diffuse onto the cell membrane . The toxicity of H 2 O 2 is low, but its overexpression can cause irreversible damage of nucleic acid, unsaturated fatty acid, lipid peroxidation of cell membrane and other harmful biological processes.…”
There are great challenges to fabricate a highly selective and sensitive enzyme‐free biomimetic sensor. Herein for the first time a unique nanostructure of porous molybdenum carbide impregnated in N‐doped carbon (p‐Mo2C/NC) is synthesized by using SiO2 nanocrystals‐templating method and is further used as an enzyme‐free electrochemical biosensor toward highly selective, sensitive detection of H2O2, of which the limit of detection, dynamic detection range and sensitivity accomplish as 0.22 μM, 0.05–4.5 mM and 577.14 μA mM−1 cm−2, respectively, and are much superior to the non‐porous molybdenum carbide impregnated in N‐doped carbon (Mo2C/NC). The sensor is also used to monitor H2O2 released from A549 living cells. This work holds a great promise to be used to monitor the presence of H2O2 in biological research while offering an important knowledge to design a highly selective and sensitive biomimetic sensor by synthesizing a porous catalyst to greatly improve the reaction surface area rather than conventionally only relying on dispersing the catalyst material into porous carbon substrate.
“…Hydrogen peroxide (H 2 O 2 ), a reactive oxygen species (ROS) plays an essential role in organisms, which is produced by oxidase enzymes in mitochondria , and can freely diffuse onto the cell membrane . The toxicity of H 2 O 2 is low, but its overexpression can cause irreversible damage of nucleic acid, unsaturated fatty acid, lipid peroxidation of cell membrane and other harmful biological processes.…”
There are great challenges to fabricate a highly selective and sensitive enzyme‐free biomimetic sensor. Herein for the first time a unique nanostructure of porous molybdenum carbide impregnated in N‐doped carbon (p‐Mo2C/NC) is synthesized by using SiO2 nanocrystals‐templating method and is further used as an enzyme‐free electrochemical biosensor toward highly selective, sensitive detection of H2O2, of which the limit of detection, dynamic detection range and sensitivity accomplish as 0.22 μM, 0.05–4.5 mM and 577.14 μA mM−1 cm−2, respectively, and are much superior to the non‐porous molybdenum carbide impregnated in N‐doped carbon (Mo2C/NC). The sensor is also used to monitor H2O2 released from A549 living cells. This work holds a great promise to be used to monitor the presence of H2O2 in biological research while offering an important knowledge to design a highly selective and sensitive biomimetic sensor by synthesizing a porous catalyst to greatly improve the reaction surface area rather than conventionally only relying on dispersing the catalyst material into porous carbon substrate.
“…On the other side, famers are mostly sprayed the pesticides in crops to earn the more profit in very short period of time. Among those pesticides, organophosphorous phosphorous compounds, especially, methyl parathion has been broadly used pesticide which induces severe heart problem, skin diseases and various unknown diseases for both animal and humans [1,2]. For these troubles, totally detoxification of MP into the aqueous and land areas is crucial role to the researchers.…”
Recently, the appearance of pesticide residues into the environment poses serious risks to the living organisms. In this view, we explored a novel and superior photocatalyst based on nanostructured sphere-like nickel tungstate (NiWO4 NSs) for the degradation of organophosphate pesticide methyl parathion (MP) under visible light irradiation, for the first time. The NiWO4 NSs were tailored through simple precipitation technique and confirmed by several spectroscopic techniques. Fascinatingly, the NiWO4 NSs portrayed superior photodegradation performances towards MP degradation with superior stability.
“…However, heterogeneous photocatalysis method is an eco-friendly method, high energy consumption, gigantic efficiency and low-cost technique for the degradation or reduction of organic pollutant into non-toxic compounds [8][9][10][11][12].…”
In past days, the occurrence of toxic heavy metal ions into the water and soil environment causes major health risk to the living organisms. In this work, we mainly focused on the photoreduction of hexavalent chromium (Cr6+) using novel sheet-like Fe2V4O13 photocatalyst under visible light irradiation. The sheet-like Fe2V4O13 was tailored through hydrothermal process using ferric chloride and sodium metavanadate precursors without addition of any templates. The surface morphology, elemental analysis and various physical properties are characterized by numerous spectroscopic techniques. Interestingly, the sheet-like Fe2V4O13 demonstrated proficient photocatalytic performances towards the reduction of Cr6+ into Cr3+. The obtained UV-visible spectroscopy results portrayed that sheet-like Fe2V4O13 could reduce above of Cr6+ solution within 40 min. Moreover, the sheet-like Fe2V4O13 holds very good stability even after five consecutive cycles. This study could open new insights for the design novel nanostructured binary metal oxides for environmental applications.
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