Showing papers by "Hong Kong Polytechnic University published in 2022"
TL;DR: In this paper, the authors analyzed the relationship between solar energy consumption and CO2 emissions in the top ten solar energy consuming countries (Australia, Germany, Japan, Spain, Italy, USA, South Korea, UK, France, and China).
110 citations
TL;DR: In this article, mesoporous black TiO2 (b-TiO2) serves as the host to assemble MoS2 and Cu2S, which could absorb near-infrared energy to enhance photothermal effect.
97 citations
TL;DR: In this paper, the authors constructed hierarchical heterostructures based on VB-group laminated vanadium disulfide (VS2) nanosheets embedded with cobalt tetroxide (Co3O4) nanoparticles.
88 citations
TL;DR: In this article , mesoporous black TiO2 (b-TiO2) serves as the host to assemble MoS2 and Cu2S, which could absorb near-infrared energy to enhance photothermal effect.
85 citations
TL;DR: In this article , the photothermal catalysis, combining the advantages of photocatalysis and thermocatalysis, has emerged as a new fast-growing research area and three different mechanisms of photothermal effects are discussed.
Abstract: Solar energy provides an alternative, sustainable, and clean source of energy to meet the global energy demands without extra carbon emissions. However, the utilization efficiency of sunlight via most traditional photocatalytic processes remains relatively low. Photothermal catalysis, combining the advantages of photocatalysis and thermocatalysis, has emerged as a new fast-growing research area. In this review, we first discuss three different mechanisms of photothermal effects and then describe the functioning principles of photothermal catalysis. We categorize the photothermal catalysts into three types based on their specific coupling modes of thermochemical and photochemical pathways. We also illustrate the catalyst design strategies and characterization methods for photothermal catalysis. As specific examples of applications, we summarize the recent research progress on the photothermal catalytic reactions for CO2 conversion, CH4 activation, NH3 synthesis, and water splitting. Last, we present the challenges and perspectives in this field, as a guide for future development in photothermal catalysis.
79 citations
TL;DR: In this article, the authors summarized the advances of typical transition metal oxides (TMOs) in photocatalysis and energy storage, and some promising strategies for improving the performance of TMOs/g-C3N4 were proposed.
79 citations
TL;DR: In this article, the authors integrated carbon-negative rice husk biochar and yard waste biochar (YBC) as green additives into the binder for low carbon stabilization/solidification (S/S) of municipal solid waste incineration (MSWI) fly ash.
77 citations
TL;DR: In this article, the polyhedral oligomericsilsesquioxane (POSS) containing amino group was covalently grafted on the surface of HNTs with 3-(2,3-epoxypropoxy)propytrimethoxysilane as a chemical bridge.
76 citations
TL;DR: A review of the current status of rechargeable Zn-air batteries can be found in this paper, where the authors discuss recent development trends including neutral and hybrid Znair batteries and highlight future research needs.
Abstract: Currently a hot research topic, rechargeable zinc-air batteries are considered one of the most promising post lithium-ion battery technologies for utility-scale energy storage, electric vehicles, and other consumer electronics. Nevertheless, despite a high energy density, low cost, and material abundance, the development of alkaline-based Zn-air batteries has been hampered by parasitic reactions at the Zn anode and sluggish oxygen redox kinetics. This article will review the current status of Zn-air batteries, discuss recent development trends including neutral and hybrid Zn-air batteries, and highlight future research needs. Specifically, an analysis of the latest publications will show that, through redesigning the anode, introducing alternative electrolytes, and engineering high-performing bifunctional oxygen catalysts, researchers have successfully prolonged the battery reversibility to a few thousand cycles and reached unprecedented energy efficiencies over 70%. Although unsolved obstacles remain, these strategies have opened up interesting possibilities in the advancement of rechargeable Zn-air batteries, creating promising prospects for the energy and electronics industries.
75 citations
TL;DR: In this paper, the causal relationship between green HRM, employees' pro-environmental performance (P-EP), environmental awareness, and servant leadership was explored, and the authors provided theoretical contributions, practical implications, and useful recommendations for managers and scholars in the hospitality industry.
71 citations
TL;DR: In this article, a high-performance NH4V4O10 cathode with oxygen vacancy and reduced graphene oxide surface modification is presented, which leads to high electronic conductivity, weak electrostatic interaction and low Zn2+ diffusion barrier.
TL;DR: In this article, the authors conducted a systematic scoping review of GF-in-GBs research and found that green buildings, although critical to climate change mitigation, have a huge investment deficit.
TL;DR: In this article , the polyhedral oligomericsilsesquioxane (POSS) containing amino group was covalently grafted on the surface of HNTs with 3-(2,3-epoxypropoxy)propytrimethoxysilane as a chemical bridge.
TL;DR: In this paper, an innovative magnesium oxysulfate cement (MOSC) binder was designed for stabilization/solidification (S/S) of MSWI fly ash, focusing on the interactions between MOSC binder and typical metallic cations (Pb2+)/oxyanions (AsO33-).
TL;DR: In this article, a multi-scale investigation was conducted to gain an in-depth understanding of the microstructure and ductility enhancement mechanism of geopolymer aggregate ECC (GPA-ECC).
Abstract: In this study, Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) incorporating geopolymer fine aggregates were successfully developed with high strength and high ductility. A multi-scale investigation was conducted to gain an in-depth understanding of the microstructure and ductility enhancement mechanism of geopolymer aggregate ECC (GPA-ECC). The use of geopolymer fine aggregates enabled the high-strength ECC to achieve higher tensile ductility and finer crack width compared to existing ones with similar compressive strength in the literature. It was found that the GPA reacted with the cementitious matrix, and the width of the GPA/matrix interfacial transition zone (ITZ) was larger than that of the silica sand/matrix ITZ. Moreover, the GPA achieved a strong bond with the cementitious matrix and could behave as “additional flaws” in high-strength matrix, resulting in saturated multiple cracking and excellent tensile ductility of ECC. This study provides a new avenue for developing high-performance fiber-reinforced cementitious composites based on artificial geopolymer aggregates.
TL;DR: In this paper, the authors provide a theoretical basis and guidance for the preparation of defective graphitic carbon nitride (CN) photocatalysts, in which the bottom-up and top-down preparation strategies are systematically summarized.
TL;DR: In this paper, a fully bio-based additive (PA@CHTM) with a core-shell structure is synthesized by chitosan microspheres and phytic acids.
TL;DR: In this article , two natural biomass derivatives i.e., tannic acid (TA) and phosphorylated-cellulose nanofibrils (P-CNFs) were employed to decorate graphene oxide network and the as-prepared flame-retardant GTP paper with ultra-sensitive fire alarm response can be applied as desirable smart fire alarm sensor material.
TL;DR: In this article , the authors conducted a systematic scoping review of GF-in-GBs research and found that green buildings, although critical to climate change mitigation, have a huge investment deficit.
TL;DR: In this article , the authors summarized the bioremediation mechanism of heavy metal ions in water by using microalgae and their modified products and put forward challenges and prospects for their industrial implementation.
TL;DR: In this article, the authors summarized the bioremediation mechanism of heavy metal ions in water by using microalgae and their modified products and put forward challenges and prospects for their industrial implementation.
TL;DR: In this paper, the contribution of various biochar properties to their PPCPs adsorption capacity was explored and the results demonstrated that the models developed by detailed surface functionality and hierarchical porous structure were more accurate (i.e., the root-mean-square error decreased by 18−24%) than those by general information such as bulk elemental composition and total pore volume.
TL;DR: In this paper, an in-situ characterization of the gas evolution on the air electrode is conducted by in situ characterization and it is found that the charging process can be divided into three stages: no obvious bubbles, small bubbles, and large bubbles owing to oxygen evolution and carbon corrosion.
TL;DR: A literature survey of 160 published articles (1981-2021) showed that DGR is the most ideal solution for long-term storage of the PUNF, as it provides an ultimate destination in a deep underground that permanently isolates the waste from inhabitants and the environment as mentioned in this paper.
TL;DR: A review of seawater-mixed concrete can be found in this paper, where the authors present a review of the last 16 years of research (2005-2021) on seawater mixed concrete.
TL;DR: This research suggests that purposely developed service-oriented data schemas that capture the essential information for high-level cloud manufacturing decision-making via PnP IIoT technologies are a good solution for connecting field-level manufacturing equipment to a cloud manufacturing platform.
Abstract: Cloud manufacturing represents a service-oriented manufacturing paradigm that allows ubiquitous and on-demand access to various customisable manufacturing services in the cloud. While a vast amount of research in cloud manufacturing has focused on high-level decision-making tasks, such as service composition and scheduling, the link between field-level manufacturing data and the cloud manufacturing platform has not been well established. Efficient data acquisition, communication, storage, query, and analysis of field-level manufacturing equipment remain a significant challenge that hinders the development of cloud manufacturing systems. Therefore, this paper investigates the implementation of the emerging Industrial Internet of Things (IIoT) technologies in a cloud manufacturing system to address this challenge. We propose a service-oriented plug-and-play (PnP) IIoT gateway solution based on a generic system architecture of IIoT-supported cloud manufacturing system. Service-oriented data schemas for manufacturing equipment are developed to capture just-enough information about field-level manufacturing equipment and allow efficient data storage and query in a cloud time-series database (TSDB). We tested the feasibility and advantages of the proposed approach via the practical implementation of the IIoT gateways on a 3D printer and a machine tool. Our research suggests that purposely developed service-oriented data schemas that capture the essential information for high-level cloud manufacturing decision-making via PnP IIoT technologies are a good solution for connecting field-level manufacturing equipment to a cloud manufacturing platform.
TL;DR: In this paper , the authors reported the detection and localization of the repeating fast radio bursts 20190520B, which is co-located with a compact, persistent radio source and associated with a dwarf host galaxy of high specific star-formation rate at a redshift of 0.241 ± 0.001.
Abstract: Abstract The dispersive sweep of fast radio bursts (FRBs) has been used to probe the ionized baryon content of the intergalactic medium 1 , which is assumed to dominate the total extragalactic dispersion. Although the host-galaxy contributions to the dispersion measure appear to be small for most FRBs 2 , in at least one case there is evidence for an extreme magneto-ionic local environment 3,4 and a compact persistent radio source 5 . Here we report the detection and localization of the repeating FRB 20190520B, which is co-located with a compact, persistent radio source and associated with a dwarf host galaxy of high specific-star-formation rate at a redshift of 0.241 ± 0.001. The estimated host-galaxy dispersion measure of approximately $${903}_{-111}^{+72}$$ 903 − 111 + 72 parsecs per cubic centimetre, which is nearly an order of magnitude higher than the average of FRB host galaxies 2,6 , far exceeds the dispersion-measure contribution of the intergalactic medium. Caution is thus warranted in inferring redshifts for FRBs without accurate host-galaxy identifications.
TL;DR: In this article, a trustworthy Internet of Things (IoT)-enabled building information modeling platform (IBP) is proposed for modular construction to ensure transparency, traceability, and traceability.
Abstract: Configuring a trustworthy Internet of Things (IoT)–enabled building information modeling (BIM) platform (IBP) is significant for modular construction to ensure transparency, traceability, a...
TL;DR: In this paper, an ultrathin NiFe layered double hydroxide nanosheets with a holey structure, oxygen vacancies and Ni3+ defects on nickel foam (NiFe-LDH-NSs/NF) were prepared by employing a simple and green H2O2-assisted etching method.
Abstract: Modifying electrocatalysts nanostructures and tuning their electronic properties through defects-oriented synthetic strategies are essential to improve the oxygen evolution reaction (OER) performance of electrocatalysts. Current synthetic strategies about electrocatalysts mainly target the single or double structural defects, while the researches about the synergistic effect of multiple structural defects are rare. In this work, the ultrathin NiFe layered double hydroxide nanosheets with a holey structure, oxygen vacancies and Ni3+ defects on nickel foam (NiFe-LDH-NSs/NF) are prepared by employing a simple and green H2O2-assisted etching method. The synergistic effect of the above three defects leads to the exposure of more active sites and significant improvement of the intrinsic activity. The optimized catalyst exhibits an excellent OER performance with an extraordinarily low overpotential of 170 mV at 10 mA·cm−2 and a small Tafel slope of 39.3 mV·dec−1 in 1 M KOH solution. Density functional theory calculations reveal this OER performance arises from pseudo re-oxidized metal-stable Ni3+ near oxygen vacancies (Ovac), which suppresses 3d-eg of Ni-site and elevates d-band center towards the competitively low electron-transfer barrier. This work provides a new insight to fabricate advanced electrocatalysts for renewable energy conversion technologies.
TL;DR: Although the economic performance of the MSC strategy is relatively poor, it has the highest self-consumption rate (SCR) and self-sufficiency rate (SSR), thereby having the advantage of using PV generation in timely manner to suit load demand.