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Publications (65)
The adverse effects of NO2 on the environment and human health promote the development of high-performance gas sensors to address the need for monitoring. Two-dimensional (2D) metal chalcogenides have been considered an emerging group of NO2-sensitive materials, while incomplete recovery and low long-term stability are the two major hurdles for the...
The emerging two-dimensional (2D) materials have led to the revolution across many fields in optics, electronics, optoelectronics, and sensors. Physical sensors such as photodetector and chemical sensors like gas and biological sensors play important roles in optical communications, imaging, environmental monitoring, remediation, as well as healthc...
The micro-morphology design of nanomaterials has always been a hot issue in the field of microwave absorption. In this work, multi-shell structure is made on the basis of hollow structure and porous structure, and the effect of shell number of nanoparticles on microwave absorption properties is studied. Multi-shell hollow porous carbon nanoparticle...
The self‐limiting Cabrera–Mott oxidation reaction on metal surfaces provides an effective pathway for synthesizing atomically thin 2D metal oxide. Inspired by this reaction, it is proposed that solid bismuth metals can react with dissolved oxygen and water molecules in an aqueous environment, forming an ultrathin oxyhydroxide layer on their surface...
One-dimensional (1D)/two-dimensional (2D) heterostructures offer attractive opportunities for developing high-performance gas sensors because of the unique built-in electric field at the hetero-interface, efficient charge separation and transportation, as well as...
Layered anion‐mixed oxycompounds have emerged as pivotal materials across diverse technological domains encompassing electronics, optics, sensing, catalysis, and energy applications. Capitalizing on the unique properties imparted by the additional anion, these compounds exhibit exceptional characteristics including ultra‐large charge carrier mobili...
Liquid metals (LMs) have attracted significant attention in the preparation of two-dimensional (2D) materials due to their unique self-limiting oxidation reactions. However, the single LM element needs to be heated...
With the growing adoption of hydrogen energy and the rapid advancement of Internet of Things (IoT) technologies, there is an increasing demand for high-performance hydrogen gas (H2) sensors. Among various sensor types, chemiresistive H2 sensors have emerged as particularly promising due to their excellent sensitivity, fast response times, cost-effe...
Detecting trace-level nitrogen dioxide (NO 2) in real time is critical due to its adverse impact on human health and the environment. However, achieving a fast response, high sensitivity and selectivity, and excellent stability in NO 2 detection remains a challenge. Two-dimensional (2D) metal chalcogenides are promising for gas sensing, but their p...
Thiol functionalization of two-dimensional (2D) metal sulfides has been demonstrated as an effective approach to enhance the sensing performances. However, most thiol functionalization is realized by multiple-step approaches in liquid medium and depends on the dispersity of 2D materials. Here, we utilize a three-dimensional (3D) In2S3 nano-porous s...
Though conventional metal oxide-based NH3 gas sensors possess the advantage of simplicity and high sensitivity, their relatively high operating temperature still limits their widespread applications. Therefore, it is essential to develop a reliable NH3 sensor that operated at room temperature. In this context, we employ the ultrasonic method to coa...
High-performance gas sensors have been developed to meet the demand for the trace detection of NO2 given the adverse effects of NO2 posed to the environment and human health. Two-dimensional...
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In article number 2200429, Zhou, Li, Ou, and co-workers developed a universal ion-exchange and in-situ pyrolysis strategy to co-regulate structural morphologies and chemical contents of metal-organic framework derivatives, achieving enhanced microwave absorption performances.
Two-dimensional (2D) or ultrathin metal sulfides have been emerging candidates in developing high-performance gas sensors given their physisorption-dominated interaction with target gas molecules. Their oxysulfide derivatives, as intermediates between oxides and sulfides, were recently demonstrated to have fully reversible responses at room tempera...
Regulating dielectric genes of hollow metal-organic frameworks is a milestone project for microwave absorption (MA). However, there is still a bottleneck in deciphering the contribution of various dielectric genes, making it hard to expand the MA potential from selective encoding gene sequences. Herein, a custom-made proton tailoring strategy is us...
Ultrathin semiconducting van der Waals (vdW) heterostructures based on transition metal
dichalcogenides (TMDs) play a critical role in developing next-generation electronic and
optoelectronic devices. The replacement of one component of the heterostructure by transition metal oxides (TMOs) certainly brings in numerous benefits including long-term s...
Calcination of metal-organic frameworks (MOFs) to prepare porous-carbon-based nanocomposites has emerged as a facile and viable method for various applications. Here, the Cu-based HKUST-1 MOF is chosen as the synthesis precursor and growth template owing to its large surface area, high pore volume, as well as facile and large-scale preparation. Thr...
Hollow metal‐organic frameworks (MOFs) with careful phase engineering have been considered to be suitable candidates for high‐performance microwave absorbents. However, there has been a lack of direct methods tailored to MOFs in this area. Here, a facile and safe Ni²⁺‐exchange strategy is proposed to synthesize graphite/CoNi alloy hollow porous com...
Graphene oxide membranes (GOMs) have great potentials in the high-performance desalination of salty wastewater. However, the low-selectivity and fouling issues are the main obstacles to practical implementation. Although compositing with TiO2 nanoparticles alleviates such problems by regulating membrane structures and photodegrading surface organic...
Two-dimensional (2D) metal sulfides have been an emerging material group for high-performance and power-saving gas sensing. However, relatively little attention is paid to developing doping-driven approaches to improve their gas interaction properties, particularly at room temperature. In this work, we realize room-temperature reversible NO2 gas se...
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Reversible H2 gas sensing at room temperature has been highly desirable given the booming of the Internet of Things (IoT), zero-emission vehicles, and fuel cell technologies. Conventional metal oxide-based semiconducting gas sensors have been considered as suitable candidates given their low-cost, high sensitivity, and long stability. However, the...
2D metal sulphides (MSs) have attracted enormous amounts of attention in developing high‐performance gas sensors. 2D noble metal sulphides and their derivatives, however, have been less studied due to their predominant nonlayered crystal structures for inefficient exfoliation, despite their surface and peculiar optoelectronic properties. Herein, we...
Atomically thin two-dimensional (2D) metal oxides exhibit unique optical, electrical, magnetic, and chemical properties, rendering them a bright application prospect in high-performance smart devices. Given the large variety of both layered and non-layered 2D metal oxides, the controllable synthesis is the critical prerequisite for enabling the exp...
Microwave shielding material and absorber serve important roles in improving the reliability of smart devices and military equipment. In this work, three-dimensional (3D) Ti3C2Tx/Fe3O4 composites with adjustable electromagnetic responses are studied. Taking advantage of the negatively charged surface of the Ti3C2Tx, the cationic surfactant cetyltri...
As a typical fascinating microstructure, the core-shell structure provides abundant possibility for material design in various fields including nano-engineering. In addition, the popular MOF derivatives have been widely explored and recognized as the most potential candidates for functional materials, especially in the field of microwave absorption...
The combination of Ag nanomaterials and special nanostructures can significantly amplify the conversion of electromagnetic energy, especially in microwave absorption applications. Herein, a kind of multishell Ag/C composite nanoparticle with about 635 nm size prepared by a self-assembly method was reported, in which the Ag nanoparticles were about...
Room temperature (RT) gas sensors based on low-dimensional materials have rapidly attracted wide attention in various automation control systems and particularly in the Internet of Things (IoT) platforms due to their unbeatable advantages such as low fabrication cost and power consumption, compactness, long-term stability, and high sensitivity over...
Magnetic-dielectric composites are widely used in microwave absorption applications and have been continuously concerned by researchers. The synthesis of high-performance microwave absorbers with specific structures is a hot research topic. However, the question on how to reasonably combine the magnetic and dielectric components for achieving excel...
Recently, microwave absorbing materials have been widely used with the development of electromagnetic wave technology such as 5G communication. It is urgent to develop low-cost electromagnetic wave absorbing materials to meet the increasing civil market demand. Herein, we report a novel and simple strategy to synthesize lightweight silicon carbide...
Titanium dioxide, owing to its manifold characteristics, specifically excellent sensitivity and stability under harsh environment, is considered as one of the probable replacements for VOCs gas sensing applications. The response of TiO2 is significantly influenced by its porosity and metal doping. To this context, this report demonstrates a facile...
Graphene oxide (GO) is regarded as one of the potential candidates for gas and humidity sensor applications owing to its excellent water adsorption capabilities. However, there is a lack of understanding the response of GO to humidity. Some authors believe the waster adsorption leads to p-type response while other think it to be n-type. The present...
In the synthesis of colloidal carbon spheres (CCSs) from glucose by hydrothermal carbonization, agglomeration and cross-linking often occur, affecting their functions as templates. In this study, the effects of various surfactants on the dispersion and particle size of CCS were investigated. The CCS synthesized with dodecyltrimethylammonium bromide...
Large-area and high-quality two-dimensional crystals are the basis for the development of the next-generation electronic and optical devices. The synthesis of two-dimensional materials in wafer scales is the first critical step for future technology uptake by the industries; however, currently presented as a significant challenge. Substantial effor...
Owing to their excellent hydrogen surface susceptibility, TiO2 thin films have been proven worthy of sensing hydrogen. However, these sensors work best at temperatures of 150 – 400 C, with poor selectivity and a low response at room temperature. In this context, the novelty of this paper includes an investigation of the critical role of electrode...
Employing TiO2 as a gas sensing material is advantageous owing to its excellent hydrogen surface receptiveness and stability under extreme conditions. However, their commercial applications are constrained by limited operating temperature range (150–400 °C) and poor selectivity. In this work, we demonstrate that the ordered mesoporous structured Ti...
Due to the combustible and explosive nature of hydrogen, it is important to keep its safety during the production, storage, transportation and utilization. To this context, new type of sensors based on TiO2 nano-films with 100, 50 and 30 nm thickness and capacitor-like sandwiched Pt/TiO2/Pt structure were fabricated to monitor the hydrogen leakage....
Hydrogen gas sensors with capacitor-like Pt/Nb-TiO2/Pt structure and various amount of Nb doping were successfully prepared by magnetron sputtering and lift-off photolithography. The Nb incorporation in the TiO2 layer has been confirmed by XPS and GIXRD measurements. It has been shown that the Nb doping delays the anatase to rutile phase transforma...
Titanium dioxide is considered as one of the potential candidates for high-temperature gas sensing applications due to its excellent sensitivity and stability. However, its practical use as a gas sensor under elevated conditions is limited on account of its selectivity and insufficient understanding of response conversion from n-to p-type. To this...
Heat treatments have been conducted on electron beam freeform-fabricated (EBF³-ed) Ti6Al4V alloy to obtain desired compressive and antifretting wear performance. The results suggested that the compression and fretting wear properties were significantly affected by the heat-treated microstructure. The subtransus heat treatment used in the present wo...
Excellent adsorption of water vapor on Graphene oxide (GO) surface, containing several inherited functional groups, leads to the development of improved humidity monitoring system that can urgently meet the high industrial demand. In this work, we fabricated GO-based humidity sensor and investigated the influence of hydroxyl groups concentration on...
The paper reports a facile, green, cost-effective, and sustainable track to fabricate humidity sensors with superior performance. This frugal way make use of biomass ashes, left by combustion and annealing of natural wood pulp paper, that can emerge as an alternative source of sensing materials. In comparison to other humidity sensors, the optimize...
The development of cost-effective simple methods to fabricate nanocomposites based on metal oxide (MOX) supported noble metals with improved performance is extremely demanding, specifically in the field of nanomaterial and gas sensor. In this this work, a facile one-step hydrothermal strategy to synthesize strongly-coupled TiO2 nanosheets supported...
Owing to its high energy density and environmentally friendly nature, hydrogen has already been regarded as the ultimate energy of the 21st century and gained significant attention from the worldwide researchers. Meanwhile, there are increasing concerns about its safe use, storage and transport as, despite being colorless and odorless, after certai...
The paper demonstrated cost-effective one-step hydrothermal process to synthesize TiO2 microrods modified with Cr2O3 nanoparticles. The crystal structure, microstructure and chemical composition of the obtained materials were characterized by XRD, SEM, TEM and EDS analysis. Subsequently, for gas sensor tests the sensors were fabricated onto a ceram...
Polycrystalline TiO2 submicron-grains with only rutile phase were synthesized via cost-effective thermal oxidation method under high temperature annealing. The gas sensors on these submicrongrains show excellent gas sensing properties in terms of their sensitivity, stability and reaction times. In addition to excellent sensing characteristics the s...
In this work we prepared Graphene oxide with modified Hummers method. We study the effect of hydroxyl groups on the humidity sensing properties at room temperature with low voltage of 0.1 V and fast response time. The functionality of the GO was intensively studied by using Fourier-transform infrared spectroscopy. We performed intensive gas sensing...
Long range nitrogen doped ordered mesoporous TiO2 (N-OMT) structures having pore size 3–4 nm and wall thickness ∼2 nm were synthesized via multi-component process and then characterized by XRD, Raman spectra, BET, SEM, TEM, and XPS. Afterwards, powders of N-OMT were sprayed on the ceramic substrates with Au interdigitated electrodes to apply as hum...
The development of cost-effective, robust, and reliable humidity monitoring system is nowadays in high demand. To this context, humidity sensors based on rutile TiO2 aggregates were prepared via thermal oxidation of pure Ti-discs at 1000 °C. The sensors based on only TiO2 aggregates exhibited the ultra-high response of about six orders of magnitude...
The development of cost-effective gas sensors with improved sensing properties and minimum power consumption for room temperature hydrogen leakage monitoring is in increasing demand. In this context, this report focus on the facile fabrication of ordered mesoporous TiO2 via evaporation-induced self-assembly route. With the controlled doping thresho...
Monitoring of humidity is of utmost importance as it is essential part of almost every process in our life. Many commercial humidity sensors based on metal oxide semiconductors are available in the market, but there is still need to synthesize low-cost, fast and highly sensitive humidity sensors with no interference from background environment. The...
