Publications by authors named "Van Huy Nguyen"

With increasing urbanization and industrialization, growing amounts of industrial waste, such as red mud (RM), fly ash (FA), blast furnace slag (BFS), steel slag (SS), and sludge, are being produced, exposing substantial threats to the environment and human health. Given that numerous researchers associate with conventional adsorbents, developing and utilizing industrial wastes derived from adsorption technology still has received limited attention. Utilizing this waste contributes to developing alternative materials with superior performance and significantly reduces the volume of solid waste.

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Photocatalysis has been widely used as one of the most promising approaches to remove various pollutants in liquid or gas phases during the last decade. The main emphasis of the study is on the synergy of vacancy engineering and heterojunction formation, two widely used modifying approaches, to significantly alter photocatalytic performance. The vacancy-induced AgCO/BiOBr/WO heterojunction system has been fabricated using a co-precipitation technique to efficiently abate methylene blue (MB) dye and doxycycline (DC) antibiotic.

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Article Synopsis
  • * The review discusses two methods for creating NH-functionalized MOFs (pre-synthetic and post-synthetic), while also identifying challenges such as high charge carrier recombination and low optical absorption that limit their effectiveness.
  • * Strategies to improve the photocatalytic performance of NH-functionalized MOFs through the creation of heterojunctions are detailed, focusing on enhancing charge separation and reducing the degradation of organic pollutants.
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Titanium dioxide (TiO) based photocatalysts have been widely used as a photocatalyst for the degradation of various persistent organic compounds in water and air. The degradation mechanism involves the generation of highly reactive oxygen species, such as hydroxyl radicals, which react with organic compounds to break down their chemical bonds and ultimately mineralize them into harmless products. In the case of pharmaceutical and pesticide molecules, TiOand modified TiOphotocatalysis effectively degrade a wide range of compounds, including antibiotics, pesticides, and herbicides.

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A variety of bacteria, including beneficial probiotic lactobacilli, produce antibacterials to kill competing bacteria. Lactobacilli secrete antimicrobial peptides (AMPs) called bacteriocins and organic acids. In the food industry, bacteriocins, but even whole cell-free supernatants, are becoming more and more important as bio-preservatives, while, in orthopedics, bacteriocins are introducing new perspectives in biomaterials technologies for anti-infective surfaces.

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Etching technology - one of the representative modern semiconductor device makers - serves as a broad descriptor for the process of removing material from the surfaces of various materials, whether partially or entirely. Meanwhile, thinning technology represents a novel and highly specialized approach within the realm of etching technology. It indicates the importance of achieving an exceptionally sophisticated and precise removal of material, layer-by-layer, at the nanoscale.

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Arsenic (As) contaminated water, especially groundwater reservoirs, is a major issue worldwide owing to its hazardous consequences on human health and the global environment issues. Also, irrigating agricultural fields with As-contaminated water not only produces an accumulation of As in the soil but also compromises food safety due to As entering into agricultural products. Hence, there is an urgent need to develop an efficient method for As removal in water.

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The present study explores visible light-assisted photodegradation of ciprofloxacin hydrochloride (CIP) antibiotic as a promising solution to water pollution. The focus is on transforming the optical and electronic properties of BiOCl through the generation of oxygen vacancies (OVs) and the exposure of (110) facets, forming a robust S-scheme heterojunction with WS. The resultant OVs mediated composite with an optimal ratio of WS and BiOCl-OV (4-WS/BiOCl-OV) demonstrated remarkable efficiency (94.

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The survival of humanity is severely threatened by the massive accumulation of waste in the ecosystem. One plausible solution for the management and upcycling of waste is conversing waste at the molecular level and deriving carbon-based nanomaterial. The field of carbon nanomaterials with distinctive properties, such as exceptionally large surface areas, good thermal and chemical stability, and improved propagation of charge carriers, remains a significant area of research.

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Article Synopsis
  • The development of advanced postharvest technologies is essential for food security, nutrition, and sustainable farming practices, particularly in reducing ethylene (CH) which causes spoilage in fresh produce.
  • Photocatalytic degradation is highlighted as a promising method for breaking down CH, with various effective photocatalysts identified, including TiO-based and metal oxide materials.
  • The study discusses the current state of CH photodegradation, its challenges, economic considerations, and suggests strategies for further enhancing the efficiency of this method in sustainable postharvest management.
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Two-dimensional transition metal dichalcogenides (2D-TMDCs) with various physical characteristics have attracted significant interest from the scientific and industrial worlds in the years following Moore's law. The p-n junction is one of the earliest electrical components to be utilized in electronics and optoelectronics, and modern research on 2D materials has renewed interest in it. In this regard, device preparation and application have evolved substantially in this decade.

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Herein, we have reported a photocatalytic BiOI, protonated g-CN heterojunction with directional charge transfer channels provided by tea waste biochar to achieve effective e/h pair isolation for the improved degradation of Methylene blue (MB) and Doxycycline hydrochloride (DCHCl). An S-scheme heterojunction was fabricated via the novel method that combined hydrothermal and ultrasonic dispersion, followed by an electrostatic self-assembly route. The as-fabricated BiOI/protonated g-CN/Tea waste biochar heterojunction formed a strong contact at the interface, as supported by the electron microscopic results.

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Constructing an effective multi-heterojunction photocatalyst with maximum charge carrier separation remains challenging. Herein, a high-efficient CoO/MIL-88A/Mn-SrTiO (CoO/MIL/Mn-STO) n-p-n heterojunction photocatalyst was successfully prepared by a simple hydrothermal method for the photodegradation of sulfamethoxazole (SMX). The combination of MIL and CoO/Mn-STO established an internal electric field and heterojunction, accelerating the separation of carriers, and thus improved photocatalytic performance.

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Background: Retinoblastoma (RB), an intraocular malignancy commonly diagnosed in children, is mostly caused by inactivating mutations of both alleles of the RB1 gene. Early genetic screening for RB1 gene mutations would greatly improve treatment outcomes and patient management.

Methods: In this study, both somatic and germline mutations were detected in blood and tumour samples of 42 RB patients using direct sequencing and multiplex ligation-dependent probe amplification.

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Recently, there has been a significant increase in the interest of using photocatalysis for environmental clean-up applications. In this research, potassium, and phosphorus co-doped graphitic carbon nitride (KPCN) photocatalyst modified with graphene oxide (GO) and heterostructured with ZnFeO was synthesized via the hydrothermal method (KPCN/GO/ZnFeO). The photoactivity of KPCN/GO/ZnFeO photocatalyst was examined for the photocatalytic degradation of target pollutants such as methylene blue (MB) dye, rhodamine B (RhB) dye, and tetracycline (TC) antibiotic.

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Covalent organic frameworks (COFs) based on core@shell nanohybrids have recently received significant attention and have become one of the most promising strategies for improving the stability and catalytic activity of COFs. Compared with traditional core@shell, COF-based core@shell hybrids own remarkable advantages, including size-selective reactions, bifunctional catalysis, and integration of multiple functions. These properties could enhance the stability and recyclability, resistance to sintering, and maximize the electronic interaction between the core and the shell.

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Article Synopsis
  • The study successfully created a CQDs-decorated MnInS/CdS/BiS heterojunction using a hydrothermal method to effectively photocatalyze the disinfection of E. coli and mineralize methyl orange dye under visible light.* -
  • Advanced spectroscopic techniques revealed that this dual Z-scheme structure improved charge transfer and photodegradation rates, achieving maximum dye degradation at pH 4 in 180 minutes.* -
  • The CQDs-MnInS/CdS/BiS composite demonstrated significant antibacterial activity and maintained its effectiveness over ten recycling cycles, highlighting its potential for wastewater treatment.*
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Over the past several decades, the increase in industrialization provoked the discharge of harmful pollutants into the environment, affecting human beings and ecosystems. ZnO-based photocatalysts seem to be the most promising photocatalysts for treating harmful pollutants. However, fast charge carrier recombination, photo corrosion, and long reaction time are the significant factors that reduce the photoactivity of ZnO-based photocatalysts.

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Doping-induced vacancy engineering of graphitic carbon nitride (GCN) is beneficial for bandgap modulation, efficient electronic excitation, and facilitated charge carrier migration. In this study, synthesis of oxygen and sulphur co-doped induced N vacancies (OSGCN) by the hydrothermal method was performed to activate peroxymonosulfate (PMS) for sulfamethoxazole (SMX) antibiotic degradation and H production. The results from experimental and DFT simulation studies validate the synergistic effects of co-dopants and N-vacancies, i.

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Article Synopsis
  • Creating efficient nanocomposites for uses like adsorption and catalysis has been challenging, but Metal Organic Framework (MOF)-based hierarchically structured composites show promise due to their high tunable functionality and porosity.
  • * These MOFs allow for improved interactions with target molecules and enhance mass transfer and stability in nanostructures.
  • * The review covers the basics of MOFs, the need for improved structures, synthesis methods, characterization techniques, and future challenges and perspectives in developing these advanced composites.
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This work successfully fabricated graphitic carbon nitride and magnetically recoverable α-FeO/g-CN/SiO photo-Fenton catalysts using thermal polycondensation and in situ-simple precursor drying-calcination process, respectively, was examined for model synthetic rhodamine B (RhB) dye in the presence of HO and acidic pH under simulated visible light irradiation. An aqueous suspension of the reaction mixture of dye-containing wastewater was fully degraded and reached 97% of photo-Fenton degradation efficiency within 120 min followed by the production of hydroxyl radical (OH). The dominant hydroxyl radical position generated surface charge, electrostatic potential distribution, and average local ionization potential, which contributed to the complete mineralization of RhB dye, according to the density functional theory (DFT) calculations.

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A TiO@MWCNTs (multi-wall carbon nanotubes) nanocomposite photoanode is prepared for photoelectrochemical water splitting in this study. The physical and photoelectrochemical properties of the photoanode are characterized using field emission-scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and linear sweep voltammetry. The results show that the TiO@MWCNTs nanocomposite has an optical bandgap of 2.

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Article Synopsis
  • Green chemistry is emerging as an effective solution for environmental issues, with cellulose recognized as a crucial biomaterial due to its beneficial properties such as biodegradability and cost-effectiveness.* -
  • Combining cellulose with nanocomposite materials improves their characteristics, leading to better performance in applications like antibiotic treatment and dye degradation, by enhancing the photocatalytic activity.* -
  • The review evaluates cellulose’s role as a support material in photocatalysis, discussing its ability to improve charge migration and reduce recombination rates, while also addressing current advancements and challenges in the field.*
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Formulation of heterojunction with remarkable high efficiency by utilizing solar light is promising to synchronously overcome energy and environmental crises. In this concern, hexagonal-borocarbonitride (h-BCN) based Z-schemes have proved potential candidates due to their spatially separated oxidation and reduction sites, robust light-harvesting ability, high charge pair migration and separation, and strong redox ability. H-BCN has emerged as a hotspot in the research field as a metal-free photocatalyst with a tunable bandgap range of 0-5.

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Objective: This pilot study was conducted to investigate changes in the pulse rate and blood pressure in healthy volunteers after applying auricular acupressure at the "heart acupoint."

Methods: A total of 120 healthy volunteers with hemodynamic indexes within normal limits were randomly allocated into 4 groups to receive auricular acupressure treatment either at the heart acupoint of the left or the right, or in both ears, and one control group without applying auricular acupressure.

Results: Before the application of auricular acupressure, there were no statistical differences in pulse rate and blood pressure increments among the four groups during the first cold pressor test.

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