Thermocatalytic hydrogen peroxide generation and environmental disinfection by Bi2Te3 nanoplates

Lin, Yu-Jiung; Khan, Imran; Saha, Subhajit; Wu, Chih‐Cheng; Barman, Snigdha Roy; Kao, Fu-Cheng; Lin, Zong‐Hong

doi:10.1038/s41467-020-20445-0

Cited by 78 publications

(81 citation statements)

References 45 publications

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“…Despite the known toxicity of tellurite ions (TeO 3 2– ) against Gram-negative bacteria, 13 , 14 the development of Te-based antimicrobial nanomaterials displaying the advantages of metal NPs has only gained interest in recent years. 15 − 18 Moreover, toxic reducing agents used in the traditional physicochemical methods for the synthesis of tellurium NPs (TeNPs) are cytotoxic to human cells and environmentally harmful. 19 , 20 To overcome the main limitations of traditional synthesis, efforts have been made to develop nanobiotechnological approaches for the synthesis of TeNPs including tellurite-reducing microorganisms 21 − 23 and plant-derived reducing agents.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Tellurium–Lignin Nanoparticles with Enhanced Antibacterial Properties

Morena

Bassegoda

Hoyo

et al. 2021

ACS Appl. Mater. Interfaces

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The surge of antibiotic-resistant bacteria is leading to the loss of effectiveness of antibiotic treatment, resulting in prolonged infections and even death. Against this healthcare threat, antimicrobial nanoparticles that hamper the evolution of resistance mechanisms are promising alternatives to antibiotics. Herein, we used Kraft lignin, a poorly valorized polymer derived from plant biomass, to develop novel hybrid tellurium–lignin nanoparticles (TeLigNPs) as alternative antimicrobial agents. The sonochemically synthesized TeLigNPs are comprised of a lignin matrix with embedded Te clusters, revealing the role of lignin as both a reducing agent and a structural component. The hybrid NPs showed strong bactericidal effects against the Gram-negative Escherichia coli and Pseudomonas aeruginosa , achieving more than 5 log bacteria reduction, while they only slightly inhibited the growth of the Gram-positive Staphylococcus aureus . Exposure of TeLigNPs to human cells did not cause morphological changes or reduction in cell viability. Studies on the antimicrobial mechanism of action demonstrated that the novel TeLigNPs were able to disturb bacterial model membranes and generate reactive oxygen species (ROS) in Gram-negative bacteria.

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Section: Introductionmentioning

confidence: 99%

Hybrid Tellurium–Lignin Nanoparticles with Enhanced Antibacterial Properties

Morena

Bassegoda

Hoyo

et al. 2021

ACS Appl. Mater. Interfaces

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“…Hydrogen peroxide (H2O2), a strong oxidizing agent, has been widely used in medical, chemical and environmental fields because of its effectiveness and eco-friendliness [1][2][3][4] . It is also recognized as a promising solar fuel due to its high energy density (3.0 MJ•L −1 ) and easy storability 5,6 .…”

mentioning

confidence: 99%

Enhanced Photocatalytic H<sub>2</sub>O<sub>2</sub> Production over Inverse Opal ZnO@ Polydopamine S-scheme Heterojunctions

Han¹,

Xu²,

Cheng³

et al. 2022

Acta Physico Chimica Sinica

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Photocatalytic H2O2 production is a sustainable and inexpensive process that requires water and gaseous O2 as raw materials and sunlight as the energy source. However, the slow kinetics of current photocatalysts limits its practical application. ZnO is commonly used as a photocatalytic material in the solar-to-chemical conversion, owing to its high electron mobility, nontoxicity, and relatively low cost. The adsorption capacity of H2O2 on the ZnO surface is low, which leads to the continuous production of H2O2. However, its photoresponse is limited to the ultraviolet (UV) region due to its wide bandgap (3.2 eV). Polydopamine (PDA) has emerged as an effective surface functionalization material in the field of photocatalysis due to its abundant functional groups. PDA can be strongly anchored onto the surface of a semiconducting photocatalyst through covalent and noncovalent bonds. The superior properties of PDA served as a motivation for this study. Herein, we prepare an inverse opal-structured porous PDA-modified ZnO (ZnO@PDA) photocatalyst by in situ self-polymerization of dopamine hydrochloride. The crystal structure, morphology, valency, stability, and energy band structure of photocatalysts are characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), electrochemical impedance spectroscopy (EIS), Mott-Schottky curve (MS), and electron paramagnetic resonance (EPR). The experimental results showed that electrons in PDA are transferred to ZnO upon contact, which results in an electric field at their interface in the direction from PDA to ZnO. The photoexcited electrons in the ZnO conduction bands flow into PDA, driven by the electric field and bent bands, and are recombined with the holes of the highest occupied molecular orbital of PDA, thereby exhibiting an S-scheme charge transfer. This unique S-scheme mechanism ensures effective electron/hole separation and preserves the strong redox ability of used photocarriers. In addition, the inverse opal structure of ZnO@PDA promotes light-harvesting due to the supposed "slow photon" effect, as well as Bragg diffraction and scattering. Moreover, the enhanced surface area provides a high adsorption capacity and increased active sites for photocatalytic reactions. Therefore, the resulting ZnO@PDA (0.03% (atomic fraction) PDA) exhibits the optimal H2O2 production performance (1011.4 μmol•L −1 •h −1 ), which is 4.4 and 8.9 times higher than pristine ZnO and PDA, respectively. The enhanced performance is ascribed to the improved light absorption, efficient charge separation, and strong redox capability of photocarriers in the S-scheme heterojunction. Therefore, this study provides a novel strategy for the design of inorganic/organic S-scheme heterojunctions for efficient photocatalytic H2O2 production.

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“…This solution-based method provides good control over the shape and size of Bi 2 Te 3 NPs, affording a viable platform for exploring the practical applications of Bi 2 Te 3 [40][41][42] . For example, the combination of high surface-volume ratio, topological surface conduction, and unique dielectric behavior has endowed Bi 2 Te 3 NPs with significant potential for use in fast logic transistors, efficient thermoelectric catalysis, wide-band photodetectors, and microwave absorbers [43][44][45][46] . Albeit never involving the field of nanogenerators, TIs' unique surface conducting properties make them ideal candidates for TENGs since the triboelectrification is strongly dominated by the surface charge transfer process between tribolayers 47,48 .…”

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confidence: 99%

Filling the gap between topological insulator nanomaterials and triboelectric nanogenerators

Wang

et al. 2022

Nat Commun

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Reliable energy modules and higher-sensitivity, higher-density, lower-powered sensing systems are constantly required to develop wearable electronics and the Internet of Things technology. As an emerging technology, triboelectric nanogenerators have been potentially guiding the landscape of sustainable power units and energy-efficient sensors. However, the existing triboelectric series is primarily populated by polymers and rubbers, limiting triboelectric sensing plasticity to some extent owing to their stiff surface electronic structures. To enrich the current triboelectric group, we explore the triboelectric properties of the topological insulator nanofilm by Kelvin probe force microscopy and reveal its relatively positive electrification charging performance. Both the larger surface potential difference and the conductive surface states of the nanofilms synergistically improve the charge transfer behavior between the selected triboelectric media, endowing the topological insulator-based triboelectric nanogenerator with considerable output performance. Besides serving as a wearable power source, the ultra-compact device array demonstrates innovative system-level sensing capabilities, including precise monitoring of dynamic objects and real-time signal control at the human-machine interface. This work fills the blank between topological quantum matters and triboelectric nanogenerators and, more importantly, exploits the significant potential of topological insulator nanofilms for self-powered flexible/wearable electronics and scalable sensing technologies.

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Thermocatalytic hydrogen peroxide generation and environmental disinfection by Bi2Te3 nanoplates

Cited by 78 publications

References 45 publications

Hybrid Tellurium–Lignin Nanoparticles with Enhanced Antibacterial Properties

Hybrid Tellurium–Lignin Nanoparticles with Enhanced Antibacterial Properties

Enhanced Photocatalytic H<sub>2</sub>O<sub>2</sub> Production over Inverse Opal ZnO@ Polydopamine S-scheme Heterojunctions

Filling the gap between topological insulator nanomaterials and triboelectric nanogenerators

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