Dong Liu

Dong Liu
Nanjing University of Science and Technology | NJUST · School of Energy and Power Engineering

PhD

About

49
Publications
6,118
Reads
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421
Citations
Additional affiliations
January 2021 - present
Nanjing University of Science and Technology
Position
  • Professor (Full)
June 2018 - January 2021
Nanjing University of Science and Technology
Position
  • Professor (Associate)
July 2015 - June 2018
Nanjing University of Science and Technology
Position
  • Professor (Assistant)
Education
September 2010 - July 2015
Tsinghua University
Field of study
  • Micro/Nanoscale Thermal Radiation
September 2006 - July 2010
Tsinghua University
Field of study
  • Thermal Engineering

Publications

Publications (49)
Article
Hydraulic resistance of H2O/CO2 mixtures for supercritical conditions, typical for a promising power generation system, has been a knowledge gap. In this work, it was experimentally investigated in a high-temperature, high-pressure, and multi-function apparatus and was further correlated. For the experimental conditions, the CO2 mass fractions were...
Article
Photoelectrochemical Redox Batteries In article number 2200469, Qiang Li, Rong Chen, Liang An and co‐workers present a comprehensive review of research and development progress in photoelectrochemical redox batteries from materials to devices. The fundamental understanding of the energy level matching, transport mechanisms, and performance indicato...
Article
Full-text available
A porous volumetric receiver is the key component in concentrated solar power systems. In this paper, we investigate the effects of volumetric parameter models on the heat collection efficiency of the volumetric receiver by numerical simulations with the combination of local thermal non-equilibrium and discrete ordinate methods. Seven volumetric co...
Article
Single‐Atom Catalysts The low loading of single‐atom catalysts makes it difficult to improve their overall activity. In article number 2200073, Ang Li, Erjun Kan, Li Song, Jinlong Gong, and co‐workers report a chemical scissors strategy to saturate the anchoring sites for single atoms, which elevates the loading of Pd single atoms even on bare subs...
Article
The photoelectrochemical redox battery (PRB) has been regarded as an alternative candidate for large‐scale solar energy capture, conversion, and storage as it combines the superior advantages of photoelectrochemical devices and redox batteries. As an emerging solar energy utilization technology, significant progress has been made towards promoting...
Article
Herein, an in-situ visual method was developed to determine the residence time characteristic of a typical gas-liquid Taylor reacting flow in a microchannel reactor. Nitrobenzene hydrogenation was chosen as a reference heterogeneous reaction. The obtained results demonstrated the feasibility of the proposed in-situ visual method in determining the...
Article
Atomically dispersed metal catalysts often exhibit high catalytic performances, but the metal loading density must be kept low to avoid the formation of metal nanoparticles, making it difficult to improve the overall activity. Diverse strategies based on creating more anchoring sites (ASs) have been adopted to elevate the loading density. One probl...
Article
Supercritical H2O/CO2 mixtures (650 K–973 K and 25 MPa, not far away from the critical temperature and pressure of water) have recently been used as the working fluid for a novel power generation system with higher efficiency and zero pollutant emission compared to conventional coal-fired power plants. The knowledge of the diffusion of these mixtur...
Article
Efficient charge separation is crucial for solar energy conversion in semiconductor-based systems. Creating p-n junction is an effective strategy to enhance charge separation because the built-in electric field could inhibit charge recombination. However, in many situations, the high reaction barrier will limit the surface reaction rate, resulting...
Article
Selective electrochemical CO2 reduction reaction (CO2RR) requires efficient triple-phase contact of CO2 molecules, electrolyte and active sites of electrocatalyst. To achieve this, studies have sought to use surface modifications to electrodes. However, the stability of these modifications and their effects on the intrinsic properties of electrodes...
Article
Electrocatalytic generation of nanometre gas bubbles (nanobubbles) and their tuning are important for many energy and chemical processes. Studies have sought to use indirect or ex situ methods to investigate the dynamics and properties of nanobubbles, which are of fundamental interest. Alternatively, we present a molecular dynamics simulation metho...
Article
Heat transfer to supercritical H2O/CO2 mixtures (24 MPa, 310 to 430 °C, and CO2 mass fractions up to 18.5%), the working fluids of a novel power generation system with coal gasified in supercritical water, was experimentally investigated for typical working conditions of this system. For these conditions, i.e., high mass velocities (above 1200 kg m...
Article
Controlling the products, i.e. achieving high selectivity, is essential yet challenging for many chemical processes. So far, ex/in situ methods have been reported to prepare selective catalysts; here, we present a distinct operational strategy. To demonstrate its power and simplicity, a high-pressure artificial photosynthetic device (HiPAD) was des...
Article
Full-text available
Flexible transparent electrodes are in significant demand in applications including solar cells, light-emitting diodes, and touch panels. The combination of high optical transparency and high electrical conductivity, however, sets a stringent requirement on electrodes based on metallic materials. To obtain practical sheet resistances, the visible t...
Article
Supercritical H2O/CO2 mixtures are the working fluids in a novel power generation system with coal gasified in supercritical water, but their heat transfer behaviors have received less attention compared with those of the supercritical water. Here, we experimentally investigated the heat transfer to these important mixtures. First, a stable and acc...
Article
Photocatalytic CO2 reduction reaction (CRR) represents a prospective route for the clean utilization of greenhouse gas CO2 and solar energy, and cuprous oxide (Cu2O) is a favourable material for CRR to avoid excess generation of hydrogen through the competitive hydrogen evolution reaction (HER). However, the application of Cu2O-based photocatalysts...
Article
The supercritical H2O/CO2 mixture is the working fluid to drive a turbine in a novel power generation system with coal gasified in supercritical water. This system is promising because of zero pollution emission in contrast to the conventional coal-fired power plant. Heat transfer coefficients of the supercritical H2O/CO2 mixtures are important to...
Article
Full-text available
Supercritical H 2 O/CO 2 mixtures are the working fluid in a novel power generation system with coal gasified in supercritical water, so their heat transfer behaviors are important to design heat transfer devices. However, heat transfer to supercritical mixtures has received few attention. Here, we designed and established an apparatus to measure t...
Article
Solar thermochemical conversion is an effective way to store unstable solar energy as chemical energy in fuels; and thus, it is of great significance in clean energy economy. Using thermochemical catalyst as the solar energy absorber directly is an advanced way to achieve high efficiency because of the cancellation of the heat resistance resulting...
Article
This work theoretically and experimentally presents a high-efficiency solar system which integrates photovoltaic cells and methanol thermal decomposition to make full use of the full-spectrum solar energy. In this optimized system, spectral beam splitting technology is used to split the solar spectrum into several wavebands. The spectrum suitable f...
Article
Full-text available
The demand for high‐performance absorbers in the microwave frequencies, which can reduce undesirable radiation that interferes with electronic system operation, has attracted increasing interest in recent years. However, most devices implemented so far are opaque, limiting their use in optical applications that require high visible transparency. He...
Article
Structural colors of high purity and brightness are desired in various applications. This study presents a general strategy of selecting the appropriate material and thickness of each layer to create high‐purity reflective colors in a classic asymmetric Fabry–Pérot cavity structure based on a dielectric–absorber–dielectric–metal multilayered config...
Article
Enhancing light absorption in two-dimensional (2-D) materials using simple planar structures is important for the development of large-area atomic-scale photonic devices but also has been a major challenge. We theoretically present a general strategy to create an atomically thin planar metasurface consisting of a semiconductor monolayer (replacing...
Article
A four-layer metallodielectric planar thermal emitter is designed and optimized to tailor the spectral near-field radiative flux in a nano-gap thermophotovoltaic (TPV) system. The structure contains an ultra-thin refractory metallic layer (tungsten) sandwiched by two dielectric (hafnia) layers sitting on a metallic substrate. The theoretical calcul...
Article
Full-text available
The achievement of perfect light absorption in ultrathin semiconductor materials is not only a long‐standing goal, but also a critical challenge for solar energy applications, and thus requires a redesigned strategy. Here, a general strategy is demonstrated both theoretically and experimentally to create a planar metasurface absorber comprising a 1...
Preprint
Full-text available
A four-layer planar metallodielectric structure is designed to be the emitter for a nano-gap TPV device. The emitter showed versatile manipulation of near-field radiative transfer mainly by controlling the propagating and frustrated modes. The system efficiency (at radiative limit) has the potential to reach or exceed other state-of-the-art designs...
Article
Here, we designed volumetric receivers from the angle of their normal absorptance and hemispherical volumetric emittance. We showed that the optimal receiver with the reticulated porous structure to date should have 95% porosity, 0.4 mm average pore diameter and 8 mm length. This receiver has both high normal absorptance and low hemispherical volum...
Article
Ultrathin planar absorbing layers, including semiconductor and metal films, and 2D materials, are promising building blocks for solar energy harvesting devices but poor light absorption has been a critical issue. Although interference in ultrathin absorbing layers has been studied to realize near perfect absorption at a specific wavelength, achievi...
Article
Full-text available
We show theoretically that 2D rectangular gratings on the surface of GaSb can serve as an “anti-reflection” pattern for nano-gap thermophotovoltaic (TPV) devices, which significantly enhances near-field radiative flux from the emitter to a GaSb cell, thus improving output power and conversion efficiency. The system in this study is a 200-nm gap TPV...
Article
Full-text available
Two challenging problems still remain for optical absorbers consisting of an ultrathin planar semiconductor film on top of an opaque metallic substrate. One is the angle-insensitive mechanism and the other is the system design needed for broadband solar energy harvesting. Here, first we theoretically demonstrates that the high refractive index, ins...
Article
Full-text available
Ultrathin planar absorbers hold promise in solar energy systems because they can reduce the material, fabrication, and system cost. Here, we present a general strategy of effective medium design to realize ultrathin planar broadband absorbers. The absorber consists of two ultrathin absorbing dielectrics to design an effective absorbing medium, a tr...
Article
Full-text available
Hematite holds promise for photoelectrochemical (PEC) water splitting due to its stability, low-cost, abundance and appropriate bandgap. However, it suffers from a mismatch between the hole diffusion length and light penetration length. We have theoretically designed and characterized an ultrathin planar hematite/silver nanohole array/silver substr...
Article
The effective medium theory (EMT) can be used for fast and approximate calculations of inhomogeneous media’s optical properties, which is helpful for considerably reducing computation times for designing the thermal radiative properties of particulate materials. Because EMT has mostly been limited to systems with characteristic sizes considerably s...
Research
Full-text available
Accepted for presentation at 19th Symposium on Thermophysical Properties, to be held in Boulder, CO, USA on June, 2015. Abstract available at http://thermosymposium.boulder.nist.gov/pdf/Abstract_3181.pdf
Article
Full-text available
Coal ash inevitably forms deposits as combustion residue on the walls and heat transfer surfaces of coal-fired boilers. Ash deposits decrease the boiler efficiency, reduce the generating capacity, and cause unscheduled outages. The radiative heat transfer is the major heat transfer mechanism in utility boilers; thus, the ash deposit emissivity is c...
Article
Full-text available
Opacified aerogels are particulate thermal insulating materials in which micrometric opacifier mineral grains are surrounded by silica aerogel nanoparticles. A geometric model was developed to characterize the spectral properties of such microsize grains surrounded by much smaller particles. The model represents the material's microstructure with t...
Article
Full-text available
500 million tons of coal fly ash are produced worldwide every year with only 16% of the total amount utilized. Therefore, potential applications using fly ash have both environmental and industrial interests. Unburned carbon concentration measurements are fundamental to effective fly ash applications. Current on-line measurement accuracies are stro...
Article
Opacified silica aerogels are composite insulating materials containing silica nanoparticles and microsize opacifier grains. The radiative heat transfer in this dispersed medium was analyzed using a realistic microstructure model to calculate the opacified aerogel’s optical properties. The aerogel matrices were simulated using aggregates generated...
Article
Full-text available
The average normal effective emissivity is widely used for calibration since it depends only on the intrinsic cavity characteristics; thus, it is an important parameter for blackbody designs and evaluations. Nonaxisymmetric cavities are widely used as standard blackbody sources and cryogenic solar absolute radiometers. The finite volume method is m...
Article
Turbulent particle cloud temperatures in the superheater pendant region are critical in coal-fired utility boilers not only for the interactions between turbulence and radiative heat transfer, but also for the ash deposit slagging and fouling on superheater tubes. The false infrared particle temperature fluctuations due to the pendant wake dynamics...
Article
Full-text available
Non-axisymmetric cavities are widely used as standard blackbody sources for radiation thermometry. The integrated effective emissivity is central to the blackbody design. Integrated effective emissivities are numerically calculated for non-isothermal, non-axisymmetric cavities. The average relative deviation is 0.087% when compared with Monte-Carlo...
Article
The infrared temperature fluctuations on a plate in a coal-fired combustor were measured and the effects of participating media on infrared measurement were revealed. The experimental results were analyzed in both the time and frequency domains. It is found the fluctuations have both random and periodic characteristics. The periodic frequency is id...

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Projects

Projects (4)
Archived project
Understanding the effects of participating media on radiation thermometry
Project
Understanding and tuning near field radiation
Project
Understanding and tuning the thermal radiative and optical properties of ultrathin films with simple planar structures