Search results for: Junjie Gu

Items from 1 to 20 out of 87 results

article

Simultaneous removal of nitrogen oxides and sulfur dioxide using ultrasonically atomized hydrogen peroxide

Jiaqi Wei, Junjie Gu, Junheng Guo, Wei Li, more

Environmental Science and Pollution Research > 2019 > 26 > 22 > 22351- 22361

A new method was developed for denitrification and desulfurization using hydrogen peroxide with the aid of an ultrasonic nebulizer to obtain high removal efficiency of NOx and SO₂. Comparing with the atomizing nozzles having the aperture size of 0.01~0.02 mm, the droplets generated using the ultrasonic nebulizer show the smallest d₅₀ value of 7.2 μm, with 72% possessing the size less than 10 μm. Based...

article

Changes in physicochemical properties of activated carbon during treatment with supercritical water

Yuechao Zhang, Senlin Tian, Junjie Gu, Ping Ning, more

The Canadian Journal of Chemical Engineering > 96 > 11 > 2369 - 2377

We investigated the changes in activated carbon (AC) physicochemical properties during treatment with supercritical water (SCW). Experimental results show that SCW treatment can increase the specific surface area and pore volume of AC. Scanning electron microscopy proves that the AC surface undergoes severe corrosion, resulting in the exposure of highly porous structures. In addition, the point‐of‐zero...

article

Cytotoxic study in the treatment of tetracycline by using magnetic Fe₃O₄–PAMAM–antibody complexes

Minrui Ou, Zihui Zhang, Yukai Wen, Huanghao Yang, more

Environmental Chemistry Letters > 2019 > 17 > 1 > 543-549

Antibiotics are widely used as drugs to treat human and animal diseases. However, the widespread use of antibiotics has induced environmental contamination by antibiotics and development of resistant bacteria. There thus a need for advanced methods to remove antibiotics, e.g. from natural waters. Here we used the concept that antigens and antibodies bind specifically to remove tetracycline. Magnetic...

article

Hydrothermal stability of different zeolites in supercritical water: Implication for synthesis of supported catalysts by supercritical water impregnation

Yuechao Zhang, Yingjie Li, Junjie Gu, Senlin Tian, more

Korean Journal of Chemical Engineering > 2018 > 35 > 9 > 1932-1940

Supercritical water (SCW) impregnation is an efficient and feasible method that has been used to prepare highly dispersed supported catalysts, but few studies have investigated the stability of support materials in supercritical water. Thus, our aim was to investigate the hydrothermal stability of zeolite supports (ZSM-5, TS-1, ZSM-35, HY, 13X, Beta, SAPO-11 and SAPO-34) as model compounds in supercritical...

article

Performance assessment of a passive core cooling design for cylindrical lithium‐ion batteries

Rui Zhao, Junjie Gu, Jie Liu

International Journal of Energy Research > 42 > 8 > 2728 - 2740

Battery thermal management (BTM) system is an indispensable component for large‐sized lithium‐ion battery packs used in aerospace and automotive applications. Besides providing a proper temperature range for batteries to operate, thus improving their efficiency, lifespan, and safety, the BTM system also needs to be well designed with considering the cost, weight, and practicability. In this paper,...

article

Enhanced removal of Cr(VI) from aqueous solution by supported ZnO nanoparticles on biochar derived from waste water hyacinth

Jiangdong Yu, Chunyan Jiang, Qingqing Guan, Ping Ning, more

Chemosphere > 2018 > 195 > C > 632-640

Biochar derived from waste water hyacinth was prepared and modified by ZnO nanoparticles for Cr(VI) removal from aqueous solution with the aim of Cr(VI) removal and management of waste biomass. The effect of carbonization temperature (500–800 °C), ZnO content (10–50 wt%) loaded on biochar and contact time (0.17–14 h) on the Cr(VI) removal were investigated. It was found that higher than 95% removal...

article

Preparation and characterization of poly(acrylic acid-co-acrylamide)/montmorillonite composite and its application for methylene blue adsorption

Congcong Wei, Zhiqun Xu, Fuhao Han, Wenkai Xu, more

Colloid and Polymer Science > 2018 > 296 > 4 > 653-667

A series of poly(acrylic acid-co-acrylamide)/montmorillonite composite (poly(AA-co-AM)/MMT) was prepared by radical polymerization. The composite was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD). Batch adsorption experiments of methylene blue (MB) from aqueous solutions were carried out...

article

Highly efficient removal of uranium(VI) from aqueous solutions by poly(acrylic acid-co-acrylamide) hydrogels

Congcong Wei, Meixia Yang, Yingyuan Guo, Wenkai Xu, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 211-221

In this study, poly(acrylic acid-co-acrylamide) (PAAAM) hydrogels were used to remove uranium (VI) ions in wastewater and characterized by FTIR, SEM, EDX. The effects of pH value, coexistence of ionic strength, contact time, initial U (VI) ion concentration and adsorption temperature were also studied. Adsorption data fitted well with pseudo-second-order, intra-particle diffusion model and Langmuir...

article

Encapsulating Fe3O4 into calcium alginate coated chitosan hydrochloride hydrogel beads for removal of Cu (II) and U (VI) from aqueous solutions

Xiaofeng Yi, Jiarui He, Yingyuan Guo, Zhenhua Han, more

Ecotoxicology and Environmental Safety > 2018 > 147 > C > 699-707

The aim of this work was to study the removal of Cu (II) and U (VI) ions from aqueous solutions by encapsulating magnetic Fe₃O₄ nanoparticles into calcium alginate coated chitosan hydrochloride (CCM) hydrogel beads. ATR-FTIR and XRD analysis data indicated that the CCM composites were successfully prepared. SEM images and EDX spectra showed that Cu²⁺ and UO₂²⁺ ions were adhered onto sorbents. Adsorption...

article

Modification of chitosan/calcium alginate/Fe₃O₄ hydrogel microsphere for enhancement of Cu(II) adsorption

Xiaofeng Yi, Meixia Yang, Liuda Mo, Wenkai Xu, more

Environmental Science and Pollution Research > 2018 > 25 > 4 > 3922-3932

Copper in drinking water causes a significant environmental problem. Composite material based on alginate hydrogel has been gaining attention in the field of Cu(II) adsorption. However, alginate-based hydrogel exhibits poor mechanical property and relative low adsorption capacity which limit their application. The present study is devoted to the modification of chitosan/calcium alginate/Fe₃O₄ (CAF)...

article

Comparison of Pd-UiO-66 and Pd-UiO-66-NH2 catalysts performance for phenol hydrogenation in aqueous medium

Qingqing Guan, Bin Wang, Xinsheng Chai, Jing Liu, more

Fuel > 2017 > 205 > C > 130-141

UiO-66, a kind of Metal-organic framework materials (MOFs) was used as a support for nano-palladium particles (i.e., Pd-UiO-66) which was used in the catalytic hydrogenation of phenol in aqueous media in this work. The performance of Pd-UiO-66 was compared with Pd-UiO-66-NH₂, in which the UiO-66 support had been modified through the introduction of NH₂ groups. Pd-UiO-66 and Pd-UiO-66-NH₂ were characterized...

article

Optimization of a phase change material based internal cooling system for cylindrical Li-ion battery pack and a hybrid cooling design

Rui Zhao, Junjie Gu, Jie Liu

Energy > 2017 > 135 > C > 811-822

An effective and compact thermal management system is essential for modern lithium-ion (Li-ion) battery powered vehicles, which involve rigorous constraints on weight and volume. In this paper, a phase change material (PCM) based battery internal cooling system is proposed by replacing the hollow mandrel in cylindrical battery with a PCM-filled mandrel, and it is tested on a fabricated steel cell...

article

JMJD1C Ensures Mouse Embryonic Stem Cell Self-Renewal and Somatic Cell Reprogramming through Controlling MicroRNA Expression

Feng Xiao, Bing Liao, Jing Hu, Shuang Li, more

Stem Cell Reports > 2017 > 9 > 3 > 927-942

The roles of histone demethylases (HDMs) for the establishment and maintenance of pluripotency are incompletely characterized. Here, we show that JmjC-domain-containing protein 1c (JMJD1C), an H3K9 demethylase, is required for mouse embryonic stem cell (ESC) self-renewal. Depletion of Jmjd1c leads to the activation of ERK/MAPK signaling and epithelial-to-mesenchymal transition (EMT) to induce differentiation...

chapter

The Effects of Cooling Structure and Li-Ion Battery Specification on the Cooling Performance of a Passive Thermal Management System

Rui Zhao, Jie Liu, Junjie Gu

2017 International Conference on Sensing, Diagnostics, Prognostics, and Control (SDPC) > 662 - 669

2017 International Conference on Sensing, Diagnostics, Prognostics, and Control (SDPC)

Battery thermal management (BTM) system is indispensable for compact lithium-ion (Li-ion) energy storage system used in aerospace and automotive applications. Besides maintaining the battery temperature within an optimum range, thus extending their lifespan and improving their electrochemical and electrical performance, the BTM system also needs to be well designed with considering the rigorous constraints...

article

Noble-metal-free bimetallic alloy nanoparticle-catalytic gasification of phenol in supercritical water

Lijuan Jia, Jiangdong Yu, Yuan Chen, Ping Ning, more

The Journal of Supercritical Fluids > 2017 > 126 > C > 79-88

The exploration of non-noble-metal catalysts for high efficiency gasification of biomass in supercritical water (SCW) is of great significance for the sustainable development. A series of Ni–M (M=Co or Zn) bimetallic nanoparticles supported on graphitized carbon black were synthesized and examined as catalysts for gasification of phenol in SCW. It was found that a nearly complete gasification of phenol...

article

A comprehensive study on Li-ion battery nail penetrations and the possible solutions

Rui Zhao, Jie Liu, Junjie Gu

Energy > 2017 > 123 > C > 392-401

Li-ion batteries are the state-of-the-art power sources for portable electronics, electric vehicles, and aerospace applications. The safety issues regarding Li-ion batteries arouse particular attentions after several accidents reported in recent years. Among various abuse conditions, nail penetration is one of the most dangerous for Li-ion batteries due to the accumulated heat generation, which could...

article

High performance noble-metal-free NiCo/AC bimetal for gasification in supercritical water

Qingqing Guan, Shanshuai Chen, Yuan Chen, Junjie Gu, more

International Journal of Hydrogen Energy > 2017 > 42 > 10 > 6511-6518

We report high performance Noble-metal-free NiCo/AC bimetal for gasification in supercritical water by the polyol reduction method with chloroplatinic acid as nucleation seed. At 475 °C and 20 min, the carbon efficiency (CE) for gasification of phenol with NiCo/AC has reached about 65%, which represents a more than 20-fold enhancement of carbon efficiency compared to the Co/AC and 6-fold compared...

article

PHB Associates with the HIRA Complex to Control an Epigenetic-Metabolic Circuit in Human ESCs

Zhexin Zhu, Chunliang Li, Yanwu Zeng, Jianyi Ding, more

Cell Stem Cell > 2017 > 20 > 2 > 274-289.e7

The chromatin landscape and cellular metabolism both contribute to cell fate determination, but their interplay remains poorly understood. Using genome-wide siRNA screening, we have identified prohibitin (PHB) as an essential factor in self-renewal of human embryonic stem cells (hESCs). Mechanistically, PHB forms protein complexes with HIRA, a histone H3.3 chaperone, and stabilizes the protein levels...

article

Fast and Automated Electromigration Analysis for CMOS RF PA Design

Junjie Gu, Haipeng Fu, Weicong Na, Qijun Zhang, more

Journal of Electronic Testing > 2017 > 33 > 1 > 133-140

This paper presents fast and automated electromigration (EM) reliability modeling by using automated modeling generation (AMG) algorithm. The AMG converts human based EM modeling into an automated modeling and simulation process with the help of ANSYS parametric design language (APDL) program. For automating the neural model training process, training-driven adaptive sampling is applied to integrate...

article

CFD analysis of flow pattern and power consumption for viscous fluids in in-line high shear mixers

Chen Zhang, Junjie Gu, Hongyun Qin, Qin Xu, more

Chemical Engineering Research and Design > 2017 > 117 > C > 190-204

In-line high shear mixers (HSMs) with ultrafine teeth are useful to intensify mixing and dispersive process with viscous fluids. However, the relationships among the flow pattern, the power consumption and design parameters are not understood deeply yet, which hindered the further equipment optimization and scale-up. In this article, the effects of two important structural parameters, tip-to-base...

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INFONA - science communication portal

Search results for: Junjie Gu

Simultaneous removal of nitrogen oxides and sulfur dioxide using ultrasonically atomized hydrogen peroxide

Changes in physicochemical properties of activated carbon during treatment with supercritical water

Cytotoxic study in the treatment of tetracycline by using magnetic Fe₃O₄–PAMAM–antibody complexes

Hydrothermal stability of different zeolites in supercritical water: Implication for synthesis of supported catalysts by supercritical water impregnation

Performance assessment of a passive core cooling design for cylindrical lithium‐ion batteries

Enhanced removal of Cr(VI) from aqueous solution by supported ZnO nanoparticles on biochar derived from waste water hyacinth

Preparation and characterization of poly(acrylic acid-co-acrylamide)/montmorillonite composite and its application for methylene blue adsorption

Highly efficient removal of uranium(VI) from aqueous solutions by poly(acrylic acid-co-acrylamide) hydrogels

Encapsulating Fe3O4 into calcium alginate coated chitosan hydrochloride hydrogel beads for removal of Cu (II) and U (VI) from aqueous solutions

Modification of chitosan/calcium alginate/Fe₃O₄ hydrogel microsphere for enhancement of Cu(II) adsorption

Comparison of Pd-UiO-66 and Pd-UiO-66-NH2 catalysts performance for phenol hydrogenation in aqueous medium

Optimization of a phase change material based internal cooling system for cylindrical Li-ion battery pack and a hybrid cooling design

JMJD1C Ensures Mouse Embryonic Stem Cell Self-Renewal and Somatic Cell Reprogramming through Controlling MicroRNA Expression

The Effects of Cooling Structure and Li-Ion Battery Specification on the Cooling Performance of a Passive Thermal Management System

Noble-metal-free bimetallic alloy nanoparticle-catalytic gasification of phenol in supercritical water

A comprehensive study on Li-ion battery nail penetrations and the possible solutions

High performance noble-metal-free NiCo/AC bimetal for gasification in supercritical water

PHB Associates with the HIRA Complex to Control an Epigenetic-Metabolic Circuit in Human ESCs

Fast and Automated Electromigration Analysis for CMOS RF PA Design

CFD analysis of flow pattern and power consumption for viscous fluids in in-line high shear mixers

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