Van-Duong Dao

Phenikaa University · Faculty of Biotechnology, Chemistry & Environmental Engineering

Interfacial solar-steam conversion (ISSC) technology, which absorbs and converts energy at the air–water interface for high energy efficiency, has rapidly progressed in freshwater production. Expanding the evaporation surface and application size inevitably increases heat losses and reduces conversion efficiency. Herein, we designed spatial pattern...

Solar-driven evaporation systems have been studied to provide clean water, especially for islandic areas. Carbon materials made from sludge in domestic wastewater treatment plants have been studied to produce light-absorbing membranes in solar-to-steam (STS) systems. However, the technical limitation of this method is that the water evaporation rat...

Growing global water scarcity has fueled the quest for sustainable and effective desalination solutions under lower energy requirements. However, it has a common strategy that has led to reducing the enthalpy of evaporation of water during solar-driven interfacial evaporation by dual-layer aerogels with effective mechanical robustness. Here, we int...

Thermoelectric material's capacity to directly transform waste heat into useable energy has captured the interest of delving into the complexities of sustainable development. Indeed, organic thermoelectric (OTE) materials are gaining momentum for wearable and portable electronics owing to low density, high flexibility, and eco-friendliness. Herin,...

Pursuing environmentally friendly and effective energy conversion technologies inspired research investigations into innovative materials and methods to generate solar steam. Herein, we demonstrate a novel methodology that leverages natural ore filter cubes anchored with polypyrrole (PPy) to enhance solar steam generation and effective thermal mana...

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 indicate...

The SPMS2023 conference, which focused on Solid State Physics and Materials Science, took place at Ho Chi Minh City University of Technology and Education in Ho Chi Minh City, Vietnam, from November 5 to 7, 2023. The event received a substantial turnout, with more than 397 abstracts submitted by prominent experts and emerging researchers in the fie...

The rapid and efficient detection of chloride (Cl⁻) ions is crucial in a variety of fields, making the development of advanced sensing methods such as colorimetric sensors an imperative advancement in analytical chemistry. Herein, a novel, selective, and straightforward paper-based colorimetric sensing platform has been developed utilizing an amorp...

Công nghệ tạo hơi nước sử dụng năng lượng mặt trời là một phương pháp bền vững đầy hứa hẹn nhằm giảm thiểu khủng hoảng năng lượng toàn cầu và tình trạng khan hiếm nước sạch. Các vật liệu tiên tiến góp phần không nhỏ trong việc nâng cao hiệu suất bay hơi của thiết bị tạo hơi nước dùng năng lượng mặt trời. Trong nghiên cứu này, chúng tôi đánh giá khả...

Graphene has garnered increasing attention for solar energy harvesting owing to its unique features. However, limitations hinder its widespread adoption in solar energy harvesting, comprising the band gapless in the molecular orbital of graphene lattice, its vulnerability to oxidation in oxidative environments, and specific toxic properties that re...

Solar-driven water purification is a promising technology that efficiently exploits solar energy for water purification, desalination, and energy generation. However, poor material compliance requires intensive energy to generate vapors under natural sunlight with real-time practical implications. Therefore, advanced functional nanomaterials are hi...

The development of a multi-functional solar-driven interfacial evaporation (SDIE) system remains a significant challenge for its large-scale applications. By taking advantage of high surface area, excellent young's moduli, anchoring/coupling capability, large absorption surface, strong absorption in the broadband solar spectrum, and efficient photo...

The development of a multi‐functional solar‐driven interfacial evaporation (SDIE) system remains a significant challenge for its large‐scale applications. By taking advantage of high surface area, excellent young's moduli, anchoring/coupling capability, large absorption surface, strong absorption in the broadband solar spectrum, and efficient photo...

Water purification by solar distillation has been deemed to be a green and promising approach for the production of potable water from undrinkable water resources. Carbonaceous materials have been well-known for the application of the sorption layer in the solar-to-steam system. Herein, both carbon spheres (CSs) and carbon dots (CDs) were synthesiz...

TiO2 nanoparticles have emerged as a great photocatalyst to degrade organic contaminants in water; however, the nanoparticles dispersed in water could be difficult to be recovered and potentially become contaminant. Herbicide like 2,4-dichlorophenoxyacetic acid (2,4-D) used in agriculture usually ends up with a large fraction remaining in water and...

In this study, phenol was adsorbed by commercial coconut shell charcoal (CSC), which is inexpensive, commercially available, non-toxic, and environmentally friendly. The measurements, namely the density functional theory (DFT) calculation, the energy-dispersive X-ray spectroscopy (EDS), and the Fourier-transform infrared spectroscopy (FTIR), were c...

Herein, the conflicting roles of F doping on the electrochemical performance of layered-spinel Li1.2Mn0.75Ni0.25O2-zFz (z = 0, 0.05, 0.1) cathode materials are studied. The compound consists of Li1.2Mn0.6Ni0.2O2 and LiMn1.5Ni0.5O4 with their phase ratio depending on F doping content. When z = 0.05, it favors the spinel phase formation, leading to i...

The spatial structure of a solar steam generator (SSG) plays an essential role in improving the solar steam efficiency and evaporation rate of the solar steam generator. Herein, the "sea urchin" 3D structure of a SSG was self-assembled using nanomagnetic Fe3O4@C particles under magnetic fields. The excellent light absorbance of the nanomagnetic Fe3...

Carbon spheres (CSs) have recently received huge attention in the fields of solar steam generation and waste water treatment. Herein, CSs were successfully prepared from glucose and citric acid by hydrothermal method. The CSs exhibited abundant hydrophilic functional groups and high adsorption of sunlight, making them suitable for solar steam gener...

Hybrid solar-driven interfacial evaporation (HSDIE) systems are promising solar technologies for simultaneous freshwater and power generation. However, lower efficiencies due to inevitable heat losses, salt accumulation, and volatile organic impurities are detrimental to the sustainability of solar evaporators that limit their practical application...

Carbon dots (CDs) have recently received much attention due to their superior properties, such as quantum-sized, strong light absorption, tunable luminescence with high quantum yield, excellent ability to donate and accept electrons, high biocompatibility, low toxicity, and environmental friendliness. CDs have been applied in energy conversion and...

Herein, dual-emission carbon dots (DE-CDs) were synthesized using a one-pot hydrothermal method. DE-CDs exhibited two well-separated peaks at 433 and 513 nm under ultraviolet excitation. The prepared DE-CDs offer selective detection of Fe³⁺ ions via inner filter effect (IFE) and Pb²⁺ ions via aggregation-induced enhancement (AIE). The obtained DE-C...

Interfacial solar-driven water evaporation has shown promising prospects in desalination technology. However, the lower photothermal conversion efficiency caused by the intermittent nature of sunlight and salt accumulation remains a significant challenge for continuous desalination. Herein, the hierarchical design of interfacial solar evaporation i...

Dual-emission carbon dots (DE-CDs) have attracted significant attention from scientists owing to their excellent optical properties. However, the synthesis method is complicated, time-consuming, and frequently uses hazardous precursors. Herein, we present a facile method for the synthesis of DE-CDs from environmentally friendly precursors and study...

In this work, the preparation, characterization, and evaluation of a novel nanocomposite using polyaniline (PANi) functionalized bi-metal oxide ZnO-TiO2 (ZnTiO@PANi) as shielding film for carbon steel (CS)-alloy in acidic chloride solution at 298 K was studied. Different spectroscopic characterization techniques, such as UV-visible spectroscopy, dy...

In this work, novel phosphate materials based on bimetallic character (Fe and Ni) were introduced by different chemical fabrication methods, the reflux method (FeNiP-R) and the sol–gel technique (FeNiP-S), and evaluated as non-precious electrodes for methanol electrooxidation in KOH electrolytes. The designed FeNiP-R and FeNiP-S samples were invest...

This work investigates an electrochemical impedance analysis based on synthesized TiO2 nanofibers (NFs) photoanodes, which were fabricated via electrospinning and calcination. The investigated photoanode substrate NFs were studied in terms of physicochemical tools to investigate their morphological character, crystallinity, and chemical contents vi...

Freshwater shortage and the growing demand for electricity are the most common issues on the path toward achieving global sustainability. Therefore, finding creative solutions involving the use of renewable energy sources presents the main challenge. Herein, we developed a cost-effective and highly efficient 2-in-1 integrated conical device consist...

Herein, a layered-spinel structure of Li3MnTiO4+z (0.8Li2Mn0.5Ti0.5O3•0.2LiMnTiO4) as a working electrode (WE) for Li-ion batteries was synthesized successfully by a solid-state reaction. The cathode delivers a capacity of 80 mAh g⁻¹ for the first discharge. During a working cycle of the battery, the layered-phase material was activated, which cont...

Bisphenol A (BPA) is an endocrine‐disrupting chemical that has caught a lot of attention recently due to its toxicity and ubiquitous presence in the environment. Therefore, removal of BPA from contaminated environments such as water is of high importance. In this study, we prepared an alginate/pectin anode containing immobilized laccase and applied...

Surface and structure gradients are ubiquitous in nature, where gradual changes in physical, chemical, mechanical and other properties of biomaterial are generated aiming to achieve intricate biological functions. These bioinspired gradients have been explored and fabricated using different materials in small scales (nm or µm) and usually with sing...

A nanohybrid of titanium dioxide (TiO2) and single-walled carbon nanotubes (SWCNTs) with dual functions of collecting electrons and transparent electrode layer is synthesized by nano-cluster deposition technology. The super-hollow structure of the SWCNTs was directly fabricated via arc discharge and fully covered with a thin layer (∼15 nm) of TiO2,...

This paper reports on the ethyl acetate (EA) removal over a honeycomb catalyst using an experimental design methodology. A mathematical model based on the response surface methodology is developed to evaluate the effect of parameters such as specific input energy (SIE), humidity, and EA concentration on the response variables (i.e., removal and ene...

According to the literature, Co²⁺ ions effectively tune the electronic and optical properties of ZnO in photocatalytic applications. Herein, an excellent degradation efficiency of 99.7% for Direct Blue 71 (DB71) under visible light excitation is obtained using the high-purity Co²⁺-doped ZnO nanoparticles synthesized by a facile hydrothermal method....

The 12th National Conference on Solid State Physics and Materials Science (SPMS2021) gathered various notable scientists (7 plenary speakers and 34 invited speakers). Attending the conference and actively participating in the debate were more than 450 scholars with an interest in the topic. Four hundred reports were divided into five specialized se...

In this study, reduced graphene oxide (rGO) was successfully produced from graphite precursor by chemical oxidation and exfoliation processes that were followed by a reduction process under mild conditions. SEM/EDX, XRD, FT-IR, BET, pHpzc were conducted to characterize the as-synthesized materials. Impacts of different factors such as contact time,...

Solar photovoltaic systems are being widely used in green energy harvesting recently. At the same rate of growth, the modules that come to the end of life are growing fast. The solar modules contain heavy metals such as lead, tin, and cadmium, which could pollute the environment. Inspection and maintenance of solar modules are important to increase...

In recent years, solar-driven steam materials and systems for water desalination and decontamination have received increasing attention from the scientific community. Notwithstanding the fundamental scientific achievements reached on this topic, numerous technological concerns still remain to be addressed, including heat loss, radiation reflection,...

The optical properties and applications of lanthanide-doped upconversion materials have been emerged due to their advantages such as high penetrated length, low ratios of signal and noise, and low toxicity. In this study, we present the preparation of Sr2YF7 (SYF) doped with Yb³⁺, Er³⁺, and Eu³⁺ ions and its application as a component of the workin...

Based on the quenching effect of fluorescence intensity of CdTe nanoparticles coated β-cyclodextrin, a novel aspartic chiral assay is suggested. The CdTe nanoparticles were synthesized by co-precipitate and then modified with β-cyclodextrin through a sonication technique to get [email protected]βCD nanoparticles. To characterize [email protected]βC...

In this study, reduced graphene oxide (rGO) was successfully produced from graphite precursor by chemical oxidation and exfoliation processes which were followed by a reduction process in mild conditions. rGO was then applied in the adsorption of tetracycline (TC) in water. SEM/EDX, XRD, FT-IR, BET, pH pzc were conducted to characterize the synthes...

This study proposed a sequential redox process to partially degrade tetrabromobisphenol A (TBBPA) within a reactor to a great extent. After 72 hours in an anoxic environment, 20 ppm of TBBPA could be effectively degraded by sulfurized zerovalent iron nanoparticles (S-nZVI) at concentrations of 2 g L-1 and 4 g L-1. Biphenol A (BPA) together with tri...

Introduction of high-capacity spinel-layered cathode materials. • Elucidating roles of the spinel phase and cation disorder in high-capacity cathodes. • The cycle stability depends on the synthesis temperature and phase component. A R T I C L E I N F O Keywords: Spinel Layered Cation disorder High-capacity cathode Li-ion battery A B S T R A C T Int...

In this study, titanium (Ti) was used as an active dopant to incorporate into BiVO4 lattice using the hydrothermal method. The synthesized BiVO4 and Ti–BiVO4 with 1, 5 and 10 wt% of Ti dopants have been applied for photocatalytic decomposition of Tetracycline under visible light irradiation. The characterized results showed that this synthesized Bi...

Herein, we reported the composite structure of LiMnO2 and Li2MnO3 as a low-cost and environmentally benign cathode material. This composite with the main phase of LiMnO2 (90%) was synthesized by hydrothermal method at 220°C from LiOH and Mn(CH3COO)2 precursors. The obtained nanosized LiMnO2-LiMnO3 cathode material exhibits a high capacity of 265 mA...

Water evaporation-induced electricity generation technology has become an extremely interesting issue recently for supplying both freshwater and electricity. This review concentrates on advances in the recent development of water evaporation-induced electricity generation systems for possible application in the Internet of Things, resistive switchi...

This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@IP-TiO2 is realized by photoreduction method. The...

In this study, we present the fabrication of nitrile butadiene rubber/waste leather fiber (NBR/WLF) composites with different weight percentages of WLF and NBR (0/100, 20/80, 30/70, 40/60, 50/50, 60/40 wt/wt). WLF was prepared by cutting the scrap leathers from the waste product of the Vietnamese leather industry. Subsequently, in order to make the...

In this study, the synthesis of micro-wheels composed of self-assembled tungsten oxide nanorods supported platinum (WO3/Pt) by atmospheric plasma reduction and its application in a counter electrode (CE) for highly efficient dye-sensitized solar cells were discussed. To characterize the developed materials, we conducted SEM, TEM, EDS-TEM, XRD. Due...

This study is the first to quantify energy band alignments at a nanostructured TiO2/Au22(SG)18 cluster interface using X-ray photoelectron spectroscopy. The d-band of Au clusters shows band-like character and occupied states at the Fermi level are not detected. The results provide evidence of the existence of a finite optical energy gap in Au22(SG)...

It is a challenge to harvest both electricity and freshwater from the oceans. This communication demonstrates that the natural-inspired hierarchical evaporator based on multi-walled carbon nanotubes can generate electricity via water evaporation for freshwater production. Furthermore, for the first time, the effect of the nature of exposed electrod...

g-C3N4/BiVO4, binary component heterojunction materials, were successfully synthesized for novel photocatalytic tetracycline (TC) decomposition. In the prepared binary component heterojunction, BiVO4 was well distributed on g-C3N4 layer. In addition, BiVO4 and g-C3N4 was intimately contacted. Both BiVO4 and g-C3N4, which band gap energies were appr...

A series of N-doped mesoporous carbon (NMC) materials are synthesized by the co-pyrolysis of an N-containing compound and carbon sources using a modified nanocasting method. The physicochemical properties are manipulated by changing the amount of resol precursors to permit the usage of these materials in the desired applications. As anodes for Li-i...

To use calcite mud waste generated from the paper production process, calcite mud was treated by calcination and then applied as a sorbent agent to remove phosphorus from an aqueous solution. The pre-treatment muds were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. The effects of calc...

Herein, the spinel-layered cathode material Li1.33MnTiO4+z (0.8LiMnTiO4•0.2Li2Mn0.5Ti0.5O3) is investigated for the purpose of developing a high-capacity, low-cost, and environmentally friendly cathode for Li-ion batteries. Sol-gel synthesis is conducted and the relationships between synthesis temperature, structure, and electrochemical performance...

NiO-nanoparticles were chemically designed via surfactant-assisted sol-gel methodology and investigated in terms of FESEM, BET, TEM, and XRD techniques which indicate the successful preparation of NiO-NPs. The electrocatalytic oxidation of urea was studied in the three-electrode cell to evaluate the efficiency of NiO-NPs material for urea electro-o...

The high cost of state-of-the-art Pt counter electrodes (CEs) hinders the large-scale applications of dye-sensitized solar cells (DSCs). The development of Pt-free catalysts while maintaining state-of-the-art catalytic activity for CE materials is one mean to reduce costs. Here, CoxSn1-x/reduced graphene oxide (RGO) (0 ≤ x ≤ 1) nanohybrids were syn...