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121 results on '"Li, Bao-Hong"'

10. Automatic Synthesis of Alternative Heat-integrated Water-using Networks

Author

Li Bao-Hong, Ruan Zhen-Zhen, and Chang Chuei-Tin

Subjects
Chemical engineering, TP155-156, Computer engineering. Computer hardware, TK7885-7895
Abstract

A novel sequential approach is developed in this work to identify alternative heat-integrated WUNs with four mathematical programming models. The proposed synthesis method can be implemented in two stages. In the first stage, the objective is to identify all alternative optimal configurations featuring the minimum freshwater usage, the minimum energy consumption and the minimum total interconnection number respectively. These structures can be determined by solving two distinct models in sequence. The possible WUN designs are identified exhaustively by adopting the ‘solution pool’ technique provided by Solver CPLEX in GAMS. The HEN designs are then generated in the second stage. From each candidate obtained in the first stage, the stream data can be readily extracted and utilized in the transshipment models for determining the minimum utility usage and the minimum number of heat transfer units. The advantages of this approach are twofold: (1) more than one alternative designs can be found, and (2) all model scales can be kept to manageable levels. A case study is provided in this paper to illustrate the effectiveness of the proposed method.

Published
2013
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19. Efficient photocatalytic degradation of methyl violet with two metal-organic frameworks

Author

Lu, Lu, Wang, Jun, Cai, Shu-Lan, Xie, Bin, Li, Bao-Hong, Man, Jian-Hui, He, Yong-Xiang, Singh, Amita, and Abhinav Kumar

Abstract

Two metal-organic frameworks, [Co2(L)(H2O)2(4,4’-bipy)]∙3CH3CN (1) and [Mn2(L)(1,10-phen)(H2O)]∙H2O (2) (H4L = 5-[bis(4-carboxybenzyl)-amino]isophthalic acid; 4,4’-bipy = 4,4’-bipyridine, 1,10-phen = 1,10-phenanthroline), with two different N-donor ligands have been synthesized. The structures of both MOFs were determined using single crystal X-ray diffraction technique. MOF 1 shows 3D uncommon (4,6,6)-c net with (4.53.62)2(57.66.82)(42.54.66.72.8) topology while in the case of 2, only L4- ligands link Mn(II) ions into a 2D layer structure with chelating 1,10-phen ligand. The results demonstrate that variation in the N-donor ligands plays a pivotal role in deciding the framework of the two MOFs. Both MOFs have been exploited as photocatalyst materials for the degradation of MV. The photocatalysis results indicate that the two MOFs are stable and are prospective candidates for degradation of methyl violet under UV light irradiation. Additionally, 2 displayed superior photocatalytic activity in comparison to 1. The probable photocatalytic activity mechanism for both 1 and 2 against MV have been proposed using density of states (DOS) calculations.

Published
2017
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32. Structures and photocatalytic performance of two d10 metal-based coordination polymers containing mixed building units.

Author

Lu, Lu, Wang, Jun, Chen, Feng, Wei, Lin-Tao, Lin, Li-Min, Li, Bao-Hong, Singh, Amita, and Kumar, Abhinav

Abstract

The linker 1,4-bis(2-methyl-imidazole-yl)-butane (bib) was used to construct two coordination polymers, specifically [Cd(bib)(ipa)]n (1) and [Zn(bib)(tpa)]n (2), in the presence of isophthalic acid (H2ipa) and terephthalic acid (H2tpa), respectively, under solvothermal conditions. Topological analyses reveal that the crystal of complex 1 consists of a 3D threefold interpenetrating network with Schläfli symbol {65.8}, while complex 2 possesses a 2D wavelike layer structure with Schläfli symbol {66}. The photocatalytic properties of both complexes for the degradation of methyl violet have been explored, revealing that complex 2 is a better photocatalyst than 1. A mechanism for the photocatalytic properties of the complexes is proposed, based on the results of density of states (DOS) and partial DOS calculations. [ABSTRACT FROM AUTHOR]

Published
2019
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38. Two Unusual Nanocage-Based Ln-MOFs with Triazole Sites: Highly Fluorescent Sensing for Fe3+ and Cr2O72−, and Selective CO2 Capture.

Author

Liu, Jian‐Qiang, Li, Gao‐Peng, Liu, Wei‐Cong, Li, Qing‐Lin, Li, Bao‐Hong, Gable, Robert W., Hou, Lei, and Batten, Stuart R.

Subjects
METAL-organic frameworks, RARE earth metal compounds, IRON ions, CHROMIUM oxide, FLUORESCENCE, CARBON dioxide adsorption, CARBON sequestration
Abstract

Luminescent metal-organic frameworks (LMOFs) containing fluorescent probes for the detection of pollutants such as organic solvents and heavy metals are becoming increasingly important, with lanthanide-MOF (Ln-MOF) materials receiving greater attention owing to the possibility of achieving fine-tuned luminescent properties. Herein, two unusual isostructural nanocage-based three-dimensional Ln-MOFs, 1-Ln (Ln=Tb, Eu), are constructed, using a new diisophthalate ligand with active Lewis basic triazole sites. Selective gas adsorption, especially the removal of CO2 from CH4, a primary component of natural gas and biogas, is desirable in terms of both economic and environmental considerations. 1-Eu is found to exhibit highly efficient luminescent sensing for Fe3+ cations and Cr2O72− anions, as well as selective CO2 capture over CH4. [ABSTRACT FROM AUTHOR]

Published
2016
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39. A Luminescent Zinc(II) Metal-Organic Framework for Selective Detection of Nitroaromatics, Fe3+ and CrO42−: A Versatile Threefold Fluorescent Sensor.

Author

Li, Bao‐Hong, Wu, Jian, Liu, Jian‐Qiang, Gu, Chu‐Ying, Xu, Jing‐Wen, Luo, Miao‐Miao, Yadav, Reena, Kumar, Abhinav, and Batten, Stuart R.

Subjects
*PHOSPHORS, *METAL-organic frameworks, *LUMINESCENCE, *NITROBENZENE, *PHOTOLUMINESCENCE
Abstract

A new ZnII metal-organic framework, [Zn6(L)3(DMA)4]⋅5 DMA (H4L=[1,1′:3′,1′′-terphenyl]-3,3′′,5,5′′-tetracarboxylic acid, DMA=dimethylacetamide), has been synthesized and characterized. The structure contains a three-dimensional 3,4,4,6-connected net with (4.62)2(66)(66)(42.610.83) topology and displays selective detection of nitrobenzene, CrO42− and Fe3+ ions. The present work thus indicates that this metal-organic framework could be a prospective candidate for developing novel luminescence sensors for the selective sensing of nitrobenzene, which can be used as a precursor for explosives. Furthermore, the photoluminescent properties of this material in different solvents and with various analytes were investigated and corroborated by theoretical calculations. The results were in good agreement with the experimental solvent-dependent luminescence behavior. [ABSTRACT FROM AUTHOR]

Published
2016
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