Sunlight-active phytol-ZnO@TiO2 nanocomposite for photocatalytic water remediation and bacterial-fouling control in aquaculture: A comprehensive study on safety-level assessment

Alexpandi, Rajaiah; Abirami, G.; Murugesan, Balaji; Jayakumar, R; Ponraj, Jeyaraj Godfred; Cai, Yurong; Pandian, Shunmugiah Karutha; Ravi, Arumugam Veera

doi:10.1016/j.watres.2022.118081

Cited by 14 publications

(3 citation statements)

References 63 publications

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“…These include hydroxyl radicals [8,43,44] (Equation ( 4)) and hydroxyl anions (Equation ( 3)). As seen before, their formation is significant in environmental and food decontamination [16,[32][33][34][35]70,71,74,75]. However, the same ROS were exposed as a mutagen for dermal cells [26], by causing DNA strand breaks and oxidative stress [65,120,123].…”

Section: Toxicity After Dermal Exposurementioning

confidence: 87%

“…Clearing the environment from these toxins has improved in the 21st century, owing to the semiconductor properties of metal oxides such as TiO 2 [32]. Its ability to generate reactive oxygen species (ROS) in aqueous suspensions has been employed in biological decontamination against ubiquitous Gram-negative pathogens, such as Escherichia coli [9] and Vibrio harveyi, by cleaving the bacterial membrane and harming intracellular components [35]. Moreover, ROS have been researched for their potential to decompose nerve agent simulants, especially organophosphates, which abound in aqueous environments [32,33].…”

Section: Chemical and Biological Warfare Agentsmentioning

confidence: 99%

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Titanium Dioxide: Structure, Impact, and Toxicity

Racovita

2022

IJERPH

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Titanium dioxide, first manufactured a century ago, is significant in industry due to its chemical inertness, low cost, and availability. The white mineral has a wide range of applications in photocatalysis, in the pharmaceutical industry, and in food processing sectors. Its practical uses stem from its dual feature to act as both a semiconductor and light scatterer. Optical performance is therefore of relevance in understanding how titanium dioxide impacts these industries. Recent breakthroughs are summarised herein, focusing on whether restructuring the surface properties of titanium dioxide either enhances or inhibits its reactivity, depending on the required application. Its recent exposure as a potential carcinogen to humans has been linked to controversies around titanium dioxide’s toxicity; this is discussed by illustrating discrepancies between experimental protocols of toxicity assays and their results. In all, it is important to review the latest achievements in fast-growing industries where titanium dioxide prevails, while keeping in mind insights into its disputed toxicity.

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Section: Toxicity After Dermal Exposurementioning

confidence: 87%

Section: Chemical and Biological Warfare Agentsmentioning

confidence: 99%

Titanium Dioxide: Structure, Impact, and Toxicity

Racovita

2022

IJERPH

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“…The work also reported that the band gap energy of the composites increased with the increasing amount of biochar beyond optimum value. This would in turn reduce the formation of electron-hole pairs since higher energy was required to activate the catalyst [28]. Hence, it was speculated that moderate carbon content would improve light harvesting capacity and band gap narrowing which in turn enhanced the generation of charge carriers commanding a higher catalytic degradation efficiency of the dye.…”

Section: Surface Analysismentioning

confidence: 99%

Enhanced Sonocatalytic Performance of Non-Metal Graphitic Carbon Nitride (g-C3N4)/Coconut Shell Husk Derived-Carbon Composite

et al. 2022

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This study focused on the modification of graphitic carbon nitride (g-C3N4) using carbon which was obtained from the pyrolysis of coconut shell husk. The sonocatalytic performance of the synthesized samples was then studied through the degradation of malachite green. In this work, pure g-C3N4, pure carbon and carbon/g-C3N4 composites (C/g-C3N4) at different weight percentages were prepared and characterized by using XRD, SEM-EDX, FTIR, TGA and surface analysis. The effect of carbon amount in the C/g-C3N4 composites on the sonocatalytic performance was studied and 10 wt% C/g-C3N4 showed the best catalytic activity. The optimization study was conducted by using response surface methodology (RSM) with a central composite design (CCD) model. Three experimental parameters were selected in RSM including initial dye concentration (20 to 25 ppm), initial catalyst loading (0.3 to 0.5 g/L), and solution pH (4 to 8). The model obtained was found to be significant and reliable with R2 value (0.9862) close to unity. The degradation efficiency of malachite green was optimized at 97.11% under the conditions with initial dye concentration = 20 ppm, initial catalyst loading = 0.5 g/L, solution pH = 8 after 10 min. The reusability study revealed the high stability of 10 wt% C/g-C3N4 as sonocatalyst. In short, 10 wt% C/g-C3N4 has a high potential for industrial application since it is cost effective, reusable, sustainable, and provides good sonocatalytic performance.

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Bioinspired Carbon‐Silver Sulfide Scaffold with Synergistic Enhanced Light Capture and Anti‐Biofouling Property for Stable Solar Steam Generation

You,

Xing,

et al. 2024

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Carbon material is a hot topic in solar evaporation. Due to the widely distributed microorganisms in natural water, biofouling has limited the actual application of solar evaporation material. Although carbon material lacks of nutrition for microbe, it is still vulnerable to biofouling because of the efficient pollutant adsorption property. However, current anti‐biofouling design focuses on microbial control, neglects its influence on evaporators light absorption, that is usually a trade‐off with evaporation efficiency. Herein, a bioinspired aligned carbon‐Ag2S scaffold is introduced with synergistical enhanced light absorption (increased to 98.0% from 97.4%) and anti‐biofouling property. The bioinspired aligned carbon‐Ag2S scaffold exhibits a 1.87 kg m−2 h−1 evaporation rate under one sun, superior to pure carbon scaffold (1.78 kg m−2 h−1). It also maintains efficient light capture (‐97.2%) and evaporation rate (1.73 kg m−2 h−1) after bacterial interference, avoiding sharp decline in light absorption (reduced to 83.3–87.6%) and evaporation performance (reduced to 1.24–1.28 kg m−2 h−1) which occurs in carbon scaffold due to biofouling. The carbon‐Ag2S scaffold shows solid advantage in balancing light captures and biofouling control, compared to carbon‐ZnO scaffold with conventional anti‐biofouling design, which inhibits biofouling sacrificing light absorption (reduced to 89.8%) and evaporation performance (reduced to 1.41 kg m−2 h−1).

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Sunlight-active phytol-ZnO@TiO2 nanocomposite for photocatalytic water remediation and bacterial-fouling control in aquaculture: A comprehensive study on safety-level assessment

Cited by 14 publications

References 63 publications

Titanium Dioxide: Structure, Impact, and Toxicity

Titanium Dioxide: Structure, Impact, and Toxicity

Enhanced Sonocatalytic Performance of Non-Metal Graphitic Carbon Nitride (g-C3N4)/Coconut Shell Husk Derived-Carbon Composite

Bioinspired Carbon‐Silver Sulfide Scaffold with Synergistic Enhanced Light Capture and Anti‐Biofouling Property for Stable Solar Steam Generation

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