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Bao T, Tang C, Li S, Qi Y, Zhang J, She P, Rao H, Qin JS. Hollow structured CdS@ZnIn 2S 4 Z-scheme heterojunction for bifunctional photocatalytic hydrogen evolution and selective benzylamine oxidation. J Colloid Interface Sci 2024; 659:788-798. [PMID: 38215615 DOI: 10.1016/j.jcis.2023.12.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/22/2023] [Accepted: 12/29/2023] [Indexed: 01/14/2024]
Abstract
Photocatalytic hydrogen evolution (PHE) is frequently constrained by inadequate light utilization and the rapid combination rate of the photogenerated electron-hole pairs. Additionally, conventional PHE processes are often facilitated by the addition of sacrificial reagents to consume photo-induced holes, which makes this approach economically unfavorable. Herein, we designed a spatially separated bifunctional cocatalyst decorated Z-scheme heterojunction of hollow structured CdS (HCdS) @ZnIn2S4 (ZIS), which was prepared by a sacrificial hard template method followed by photo-deposition. Consequently, PdOx@HCdS@ZIS@Pt exhibited efficient PHE (86.38 mmol·g-1·h-1) and benzylamine (BA) oxidation coupling (164.75 mmol·g-1·h-1) with high selectivity (97.34 %). The unique hollow core-shelled morphology and bifunctional cocatalyst loading in this work hold great potential for the design and synthesis of bifunctional Z-scheme photocatalysts.
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Affiliation(s)
- Tengfei Bao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Chenxi Tang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Shuming Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Yuanyuan Qi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Jing Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China; Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China.
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
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She P, Li S, Li X, Rao H, Men X, Qin JS. Photocatalytic antibacterial agents based on inorganic semiconductor nanomaterials: a review. Nanoscale 2024; 16:4961-4973. [PMID: 38390689 DOI: 10.1039/d3nr06531f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Microbial contamination and antibiotic pollution have threatened public health and it is important to develop a rapid and safe sterilization strategy. Among various disinfection strategies, photocatalytic antibacterial methods have drawn increasing attention due to their efficient disinfection performances and environment-friendly properties. Although there are some reviews about bacterial disinfection, specific reviews on photocatalysis focused on inorganic semiconductor nanomaterials are rarely reported. Herein, we present a systematic summary of recent disinfection developments based on inorganic nanomaterials (including metal oxides, sulfides, phosphides, carbon materials, and corresponding heterostructures) over the past five years. Moreover, key factors and challenges for inorganic nanomaterial-based photocatalytic disinfection are outlined, which holds great potential for future photocatalytic antibacterial applications.
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Affiliation(s)
- Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Shuming Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Xuejing Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
| | - Xiaoju Men
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Changsha, China
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China.
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Zhang J, She P, Xu Q, Tian F, Rao H, Qin JS, Bonin J, Robert M. Efficient Visible-Light-Driven Carbon Dioxide Reduction using a Bioinspired Nickel Molecular Catalyst. ChemSusChem 2024:e202301892. [PMID: 38324459 DOI: 10.1002/cssc.202301892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 01/17/2024] [Accepted: 02/07/2024] [Indexed: 02/09/2024]
Abstract
Inspired by natural enzymes, this study presents a nickel-based molecular catalyst, [Ni‖ (N2 S2 )]Cl2 (NiN2 S2 , N2 S2 =2,11-dithia[3,3](2,6)pyridinophane), for the photochemical catalytic reduction of CO2 under visible light. The catalyst was synthesized and characterized using various techniques, including liquid chromatography-high resolution mass spectrometry (LC-HRMS), UV-Visible spectroscopy, and X-ray crystallography. The crystallographic analysis revealed a slightly distorted octahedral coordination geometry with a mononuclear Ni2+ cation, two nitrogen atoms and two sulfur atoms. Photocatalytic CO2 reduction experiments were performed in homogeneous conditions using the catalyst in combination with [Ru(bpy)3 ]Cl2 (bpy=2,2'-bipyridine) as a photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH) as a sacrificial electron donor. The catalyst achieved a high selectivity of 89 % towards CO and a remarkable turnover number (TON) of 7991 during 8 h of visible light irradiation under CO2 in the presence of phenol as a co-substrate. The turnover frequency (TOF) in the initial 6 h was 1079 h-1 , with an apparent quantum yield (AQY) of 1.08 %. Controlled experiments confirmed the dependency on the catalyst, light, and sacrificial electron donor for the CO2 reduction process. These findings demonstrate this bioinspired nickel molecular catalyst could be effective for fast and efficient photochemical catalytic reduction of CO2 to CO.
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Affiliation(s)
- Jing Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Qiang Xu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Fengkun Tian
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Julien Bonin
- Université Paris Cité, CNRS, Laboratoire d'Electrochimie Moléculaire (LEM), F-75013, Paris, France
| | - Marc Robert
- Université Paris Cité, CNRS, Laboratoire d'Electrochimie Moléculaire (LEM), F-75013, Paris, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
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Qin Z, Yin S, She P, Kong L, Yang X, Sun H. Cotton Cloth@ Polydimethylsiloxane -Graphene Flakes- Titanium Dioxide Composite Membrane for Wastewater Purification. J Colloid Interface Sci 2024; 654:1251-1259. [PMID: 37907004 DOI: 10.1016/j.jcis.2023.10.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 11/02/2023]
Abstract
Interfacial solar steam generation (ISSG) has been regarded as a simple and highly-efficient method for wastewater purification. Herein, we prepared a superhydrophobic composite membrane, in which polydimethylsiloxane employed as binders to pack graphite flakes and titanium dioxide tightly onto cotton cloth (defined as cotton cloth@PDMS-C-P25). Benefiting from its powerful photothermal effects, cotton cloth@PDMS-C-P25 exhibited high evaporation flux of 1.86 kg m-2 h-1 and 1.73 kg m-2 h-1 for pure water and seawater, respectively. Meanwhile, the prepared composite membrane fulfilled the targets of sewage purification set by its photocatalytic properties, which demonstrated a degradation rate of 66.1 % for Rhodamine B (RhB), and antibacterial efficiency of over 99.99 % for Escherichia coli (E. coli). Furthermore, cotton cloth@PDMS-C-P25 surface was endowed with superhydrophobic and low-adhesion characteristics mainly owing to the synergy of multiscale structure and low surface energy matter, which contribute to the anti-adhesion effect of 97.9 % for E. coli at a high concentration of 107 colony forming units (CFUs). In this work, the cost-effective, environmentally friendly, long-term stable, and superhydrophobic solar-absorber holds a potential prospect for wastewater treatment and desalination in a typical pollution-induced water shortage area.
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Affiliation(s)
- Zhen Qin
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China
| | - Shengyan Yin
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, China
| | - Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Liang Kong
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China
| | - Xiangyu Yang
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China
| | - Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China.
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She P, Qin JS, Sheng J, Qi Y, Rui H, Zhang W, Ge X, Lu G, Song X, Rao H. Dual-Functional Photocatalysis for Cooperative Hydrogen Evolution and Benzylamine Oxidation Coupling over Sandwiched-Like Pd@TiO 2 @ZnIn 2 S 4 Nanobox. Small 2022; 18:e2105114. [PMID: 34984800 DOI: 10.1002/smll.202105114] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Photocatalytic hydrogen evolution (PHE) over semiconductor photocatalysts is usually constrained by the limited light-harvesting and separation of photogenerated electron-hole pairs. Most of the reported systems focusing on PHE are facilitated by consuming the photoinduced holes with organic sacrificial electron donors (SEDs). The introduction of the SEDs not only causes the environmental problem, but also increases the cost of the reaction. Herein, a dual-functional photocatalyst is developed with the morphology of sandwiched-like hollowed Pd@TiO2 @ZnIn2 S4 nanobox, which is synthesized by choosing microporous zeolites with sub-nanometer-sized Pd nanoparticles (Pd NPs) embedded as the sacrificial templates. The ternary Pd@TiO2 @ZnIn2 S4 photocatalyst exhibits a superior PHE rate (5.35 mmol g-1 h-1 ) and benzylamine oxidation conversion rate (>99%) simultaneously without adding any other SEDs. The PHE performance is superior to the reported composites of TiO2 and ZnIn2 S4 , which is attributed to the elevated light capture ability induced by the hollow structure, and the enhanced charge separation efficiency facilitated by the ultrasmall sized Pd NPs. The unique design presented here holds great potential for other highly efficient cooperative dual-functional photocatalytic reactions.
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Affiliation(s)
- Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Center of Future Science, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Jiyao Sheng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Center of Future Science, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Yuanyuan Qi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Center of Future Science, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Hongbang Rui
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Center of Future Science, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Wei Zhang
- Electron Microscopy Center, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Xin Ge
- Electron Microscopy Center, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Geyu Lu
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Gas Sensors, Jilin Province, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China
| | - Xiaowei Song
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Center of Future Science, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Center of Future Science, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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Bao S, Lv M, Zhao C, She P, Lei Z, Song X, Jia M. Low temperature water-assisted crystallization approach to MOF@TiO 2 core-shell nanostructures for efficient dye removal. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00293k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-organic frameworks (MOFs) have showed excellent adsorption and degradation performance towards different kinds of dyes, but suffer problems in desorption process that cannot remove adsorbates completely and may cause energy...
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She P, Guan B, Sheng J, Qi Y, Qiao G, Rui H, Lu G, Qin JS, Rao H. Bioinspired spike-like double yolk–shell structured TiO2@ZnIn2S4 for efficient photocatalytic CO2 reduction. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02079j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A spike-like double yolk–shell structured TiO2@ZnIn2S4 (D-Y-TiO2@ZnIn2S4) photocatalyst was designed, which possesses superior photocatalytic CO2 reduction efficiency.
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Affiliation(s)
- Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Buyuan Guan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jiyao Sheng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Yuanyuan Qi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Guanyu Qiao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Hongbang Rui
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Geyu Lu
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Gas Sensors, Jilin Province, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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Feng L, Pang J, She P, Li JL, Qin JS, Du DY, Zhou HC. Metal-Organic Frameworks Based on Group 3 and 4 Metals. Adv Mater 2020; 32:e2004414. [PMID: 32902012 DOI: 10.1002/adma.202004414] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/25/2020] [Indexed: 06/11/2023]
Abstract
Metal-organic frameworks (MOFs) based on group 3 and 4 metals are considered as the most promising MOFs for varying practical applications including water adsorption, carbon conversion, and biomedical applications. The relatively strong coordination bonds and versatile coordination modes within these MOFs endow the framework with high chemical stability, diverse structures and topologies, and interesting properties and functions. Herein, the significant progress made on this series of MOFs since 2018 is summarized and an update on the current status and future trends on the structural design of robust MOFs with high connectivity is provided. Cluster chemistry involving Y, lanthanides (Ln, from La to Lu), actinides (An, from Ac to Lr), Ti, and Zr is initially introduced. This is followed by a review of recently developed MOFs based on group 3 and 4 metals with their structures discussed based on the types of inorganic or organic building blocks. The novel properties and arising applications of these MOFs in catalysis, adsorption and separation, delivery, and sensing are highlighted. Overall, this review is expected to provide a timely summary on MOFs based on group 3 and 4 metals, which shall guide the future discovery and development of stable and functional MOFs for practical applications.
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Affiliation(s)
- Liang Feng
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
| | - Jiandong Pang
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
| | - Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Jia-Luo Li
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
- International Center of Future Science, Jilin University, Changchun, 130012, P. R. China
| | - Dong-Ying Du
- National and Local United Engineering Lab for Power Battery, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843-3003, USA
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She P, Rao H, Guan B, Qin JS, Yu J. Spatially Separated Bifunctional Cocatalysts Decorated on Hollow-Structured TiO 2 for Enhanced Photocatalytic Hydrogen Generation. ACS Appl Mater Interfaces 2020; 12:23356-23362. [PMID: 32329595 DOI: 10.1021/acsami.0c04905] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Efficient charge separation can promote photocatalysis of semiconductors. Herein, a hollow-structured TiO2 sphere decorated with spatially separated bifunctional cocatalysts was designed, which exhibited enhanced photocatalytic hydrogen generation. Ultrasmall-sized MOx (M = Pd, Co, Ni, or Cu) nanoparticles (NPs) were first introduced into a zeolite via confinement synthesis, and then, hollow TiO2 was fabricated by using the zeolite as a sacrificial template forming MOx@TiO2. Finally, Pt NPs were decorated on the outer shell, giving rise to MOx@TiO2@Pt, in which the MOx NPs and Pt NPs acted as hole capturers and electron sinks, respectively. Thanks to the enhanced light harvesting of the hollow structure and improved charge separation induced by the smaller-sized cocatalysts as well as spatially separated bifunctional cocatalysts, the as-prepared PdOx@TiO2@Pt catalyst exhibited a superior photocatalytic hydrogen-generation property (0.45 mmol h-1). This work demonstrates the advantage of the spatially separated bifunctional cocatalysts in enhancing the photocatalytic properties of semiconductors.
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Affiliation(s)
- Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Heng Rao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Buyuan Guan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jun-Sheng Qin
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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10
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She P, Xu K, Yin S, Shang Y, He Q, Zeng S, Sun H, Liu Z. Bioinspired self-standing macroporous Au/ZnO sponges for enhanced photocatalysis. J Colloid Interface Sci 2018; 514:40-48. [DOI: 10.1016/j.jcis.2017.12.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 11/24/2017] [Accepted: 12/02/2017] [Indexed: 10/18/2022]
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11
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She P, Xu K, Shang Y, He Q, Zeng S, Yin S, Lu G, Liang S, Sun H, Liu Z. ZnO nanodisks decorated with Au nanorods for enhanced photocurrent generation and photocatalytic activity. NEW J CHEM 2018. [DOI: 10.1039/c7nj03968a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AuNR-/ZnONDKs with AuNRs decorated on the surfaces of round ZnO disks demonstrate superior photocurrent generation properties and photodegradation efficiency.
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12
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Zeng S, Sun H, Wu Y, Shang Y, She P, He Q, Yin S, Liu Z. Spiky nanohybrids of TiO2/Au nanorods for enhanced hydrogen evolution and photocurrent generation. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00717e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Spiky TiO2/AuNR nanohybrids showing enhanced hydrogen evolution and photocurrent generation because of the synergistic effects of plasmonic AuNRs and the spiky structure.
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Affiliation(s)
- Shan Zeng
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Yilun Wu
- State Key Laboratory of Integrated Optoelectronics
- College of Electronic Science and Engineering
- Jilin University
- Changchun
- China
| | - Yinxing Shang
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Ping She
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Qinrong He
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Shengyan Yin
- State Key Laboratory of Integrated Optoelectronics
- College of Electronic Science and Engineering
- Jilin University
- Changchun
- China
| | - Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
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13
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She P, Yin S, He Q, Zhang X, Xu K, Shang Y, Men X, Zeng S, Sun H, Liu Z. A self-standing macroporous Au/ZnO/reduced graphene oxide foam for recyclable photocatalysis and photocurrent generation. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.06.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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She P, Xu K, Zeng S, He Q, Sun H, Liu Z. Investigating the size effect of Au nanospheres on the photocatalytic activity of Au-modified ZnO nanorods. J Colloid Interface Sci 2017; 499:76-82. [DOI: 10.1016/j.jcis.2017.03.089] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/07/2017] [Accepted: 03/20/2017] [Indexed: 01/25/2023]
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15
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Sun H, He Q, Zeng S, She P, Zhang X, Li J, Liu Z. Controllable growth of Au@TiO2 yolk–shell nanoparticles and their geometry parameter effects on photocatalytic activity. NEW J CHEM 2017. [DOI: 10.1039/c7nj01491k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The one-pot hydrothermal approach has been used to achieve Au@TiO2 yolk–shell NPs with different geometry parameters: smaller cavities, thinner TiO2 shells and medium Au cores facilitate more efficient photocatalysis.
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Affiliation(s)
- Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Qinrong He
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Shan Zeng
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Ping She
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Xiaochen Zhang
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Jiayi Li
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
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16
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Sun H, Zeng S, He Q, She P, Xu K, Liu Z. Spiky TiO2/Au nanorod plasmonic photocatalysts with enhanced visible-light photocatalytic activity. Dalton Trans 2017; 46:3887-3894. [DOI: 10.1039/c7dt00345e] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Spiky TiO2/AuNR plasmonic photocatalysts show improved visible-light photocatalytic activity by simultaneously enhancing light harvesting, charge utilization efficiency, and substrate accessibility.
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Affiliation(s)
- Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Shan Zeng
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Qinrong He
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Ping She
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Kongliang Xu
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
| | - Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- China
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17
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Liu Z, Xu K, She P, Yin S, Zhu X, Sun H. Self-assembly of 2D MnO 2 nanosheets into high-purity aerogels with ultralow density. Chem Sci 2016; 7:1926-1932. [PMID: 29899917 PMCID: PMC5966798 DOI: 10.1039/c5sc03217b] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 11/26/2015] [Indexed: 01/12/2023] Open
Abstract
Self-assembling inorganic nanoparticles (NPs) into macroscopic three dimensional (3D) architectures often requires the assistance of organic components, leaving residual organics in the resultant. In this work, organic-free MnO2 aerogels with ultralow density have been achieved by the self-assembly of two dimensional (2D) MnO2 nanosheets via an ice-templating approach. To the authors' best knowledge, it is the first reported case of constructing a high-purity inorganic aerogel from preformed NPs without using any functionalization or stabilization agents. Moreover, it has been demonstrated that an ultralight MnO2 aerogel with a density as low as ∼0.53 mg cm-3, which is the lightest metal oxide aerogel to date, can be well obtained by such an approach. The successful formation of the aerogel can be attributed to the enhanced van der Waals force between the 2D building blocks that have been more orderly arranged by the squeezing of ice crystals during the freezing process. Hence, this work shows a pioneering example of assembling inorganic NPs into aerogels relying only on the weak interactions between NPs (e.g. van der Waals forces). It has also been demonstrated that the obtained MnO2 aerogel can function as an effective absorbent for toxic reducing gas, owing to its strong oxidation ability and high porosity. The strategy presented herein holds good potential to be applied to the fabrication of other high-purity inorganic aerogels, especially those with 2D building blocks readily available.
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Affiliation(s)
- Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education) , College of Biological and Agricultural Engineering , Jilin University , Changchun , Jilin 130022 , P. R. China .
| | - Kongliang Xu
- Key Laboratory of Bionic Engineering (Ministry of Education) , College of Biological and Agricultural Engineering , Jilin University , Changchun , Jilin 130022 , P. R. China .
| | - Ping She
- Key Laboratory of Bionic Engineering (Ministry of Education) , College of Biological and Agricultural Engineering , Jilin University , Changchun , Jilin 130022 , P. R. China .
| | - Shengyan Yin
- State Key Laboratory on Integrated Optoelectronics , College of Electronic Science and Engineering , Jilin University , Changchun , Jilin 130012 , P. R. China
| | - Xuedong Zhu
- Key Laboratory of Bionic Engineering (Ministry of Education) , College of Biological and Agricultural Engineering , Jilin University , Changchun , Jilin 130022 , P. R. China .
| | - Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education) , College of Biological and Agricultural Engineering , Jilin University , Changchun , Jilin 130022 , P. R. China .
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18
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Abstract
Supercapacitor electrodes fabricated from macroscopic porous MnO2 aerogels have demonstrated enhanced specific capacitance, high rate capability and excellent cycling durability.
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Affiliation(s)
- Kongliang Xu
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- P. R. China
| | - Xuedong Zhu
- College of Life Sciences
- Jilin University
- Changchun
- P. R. China
| | - Ping She
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- P. R. China
| | - Yinxing Shang
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- P. R. China
| | - Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- P. R. China
| | - Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education)
- College of Biological and Agricultural Engineering
- Jilin University
- Changchun
- P. R. China
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19
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Kong F, Zheng D, She P, Ni P, Zhu H, Xu H, Su Z. Porphyromonas gingivalis B cell Antigen Epitope Vaccine, pIRES-ragB'-mGITRL, Promoted RagB-Specific Antibody Production and Tfh Cells Expansion. Scand J Immunol 2015; 81:476-82. [PMID: 25689343 DOI: 10.1111/sji.12281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Accepted: 01/27/2015] [Indexed: 11/30/2022]
Abstract
The outer membrane protein RagB is one of the major virulence factors of Porphyromonas gingivalis (P. gingivalis). To prevent periodontitis and associated systemic diseases induced by P. gingivalis, we built B cell antigen epitope vaccine characterized by pIRES-ragB'-mGITRL to induce a protective immune responses. The B cell antigen epitope and scrambled peptide of ragB were predicted, cloned into pIRES and constructed pIRES-ragB', pIRES-scrambled epitopes and pIRES-ragB'-mGITRL. pIRES-ragB'-mGITRL was transfected into COS-7 cells. Subsequently, the 6-week-old female BALB/c mice were challenged by P. gingivalis following three time immunization by pIRES, pIRES-ragB', pIRES-scrambled epitopes and pIRES-ragB'-mGITRL. The levels of RagB-specific antibody in the serum and Tfh cells in the spleen were measured by ELISA and flow cytometry, respectively. And higher levels of RagB-specific IgG were produced in the immunized mice with pIRES-ragB'-mGITRL. Additionally, the number of Tfh cells was also expanded and lesions were diminished in pIRES-ragB'-mGITRL mice comparing with control groups. Our results clearly demonstrated that P. gingivalis B cell antigen epitope vaccine, pIRES-ragB'-mGITRL, could induce protective immune responses. Furthermore, our data also indicated that pIRES-ragB'-mGITRL was a potential therapeutic vaccine against P. gingivalis.
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Affiliation(s)
- F Kong
- Department of Stomatology, the Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - D Zheng
- Department of Stomatology, the Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - P She
- Department of Stomatology, the Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
| | - P Ni
- Department of Immunology & Laboratory Immunology, Jiangsu University, Zhenjiang, China
| | - H Zhu
- Department of Immunology & Laboratory Immunology, Jiangsu University, Zhenjiang, China
| | - H Xu
- Department of Immunology & Laboratory Immunology, Jiangsu University, Zhenjiang, China
| | - Z Su
- Department of Immunology & Laboratory Immunology, Jiangsu University, Zhenjiang, China
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20
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Bobe G, Hippen A, She P, Lindberg G, Young J, Beitz D. Effects of glucagon infusions on protein and amino acid composition of milk from dairy cows. J Dairy Sci 2009; 92:130-8. [DOI: 10.3168/jds.2008-1450] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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21
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She P, Shiota M, Shelton KD, Chalkley R, Postic C, Magnuson MA. Phosphoenolpyruvate carboxykinase is necessary for the integration of hepatic energy metabolism. Mol Cell Biol 2000; 20:6508-17. [PMID: 10938127 PMCID: PMC86125 DOI: 10.1128/mcb.20.17.6508-6517.2000] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We used an allelogenic Cre/loxP gene targeting strategy in mice to determine the role of cytosolic phosphoenolpyruvate carboxykinase (PEPCK) in hepatic energy metabolism. Mice that lack this enzyme die within 3 days of birth, while mice with at least a 90% global reduction of PEPCK, or a liver-specific knockout of PEPCK, are viable. Surprisingly, in both cases these animals remain euglycemic after a 24-h fast. However, mice without hepatic PEPCK develop hepatic steatosis after fasting despite up-regulation of a variety of genes encoding free fatty acid-oxidizing enzymes. Also, marked alterations in the expression of hepatic genes involved in energy metabolism occur in the absence of any changes in plasma hormone concentrations. Given that a ninefold elevation of the hepatic malate concentration occurs in the liver-specific PEPCK knockout mice, we suggest that one or more intermediary metabolites may directly regulate expression of the affected genes. Thus, hepatic PEPCK may function more as an integrator of hepatic energy metabolism than as a determinant of gluconeogenesis.
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Affiliation(s)
- P She
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA
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22
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Hippen AR, She P, Young JW, Beitz DC, Lindberg GL, Richardson LF, Tucker RW. Metabolic responses of dairy cows and heifers to various intravenous dosages of glucagon. J Dairy Sci 1999; 82:1128-38. [PMID: 10386299 DOI: 10.3168/jds.s0022-0302(99)75336-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To evaluate the ability of glucagon to improve carbohydrate status in dairy cows without an increase in blood lipids, glucagon was infused intravenously for 48 h into lactating cows and spayed heifers in three crossover experiments. During Experiment 1, glucagon (5 and 20 mg/d) was infused into four midlactation cows. Experiment 2 involved the infusion of 0, 2.5, 5.0, or 10 mg/d of glucagon into eight heifers; each heifer received two of the dosages. In Experiment 3, four early lactation cows were treated with 5 and 10 mg/d of glucagon. Glucagon consistently increased plasma glucose concentrations in a dose-dependent fashion throughout the 48-h periods. Plasma insulin was increased in a nondose-dependent manner by glucagon in Experiment 1. Plasma urea N was increased when glucagon was administered at 5 mg/d during Experiment 2 and tended to be decreased during Experiment 3. Nonesterified fatty acids in plasma were, in most cases, not affected; however, they were increased by glucagon at 10 mg/d during Experiment 2. Concentrations of beta-hydroxybutyrate were increased only by the 20-mg/d dosage. During Experiment 1, liver glycogen concentrations decreased by 2.1% (wet weight basis) for both dosages of glucagon, and concentrations of total lipid in the liver were increased by 0.6% (wet weight basis) by 20 mg/d of glucagon. Milk fat percentage was increased by glucagon, but milk volume and milk protein production were decreased during Experiment 1. Glucagon improved carbohydrate status over the 48-h periods in all experiments but did not increase plasma nonesterified fatty acids except at the 10-mg/d dosage in Experiment 2.
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Affiliation(s)
- A R Hippen
- Department of Animal Science, Iowa State University, Ames 50011-3150, USA
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23
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Hippen AR, She P, Young JW, Beitz DC, Lindberg GL, Richardson LF, Tucker RW. Alleviation of fatty liver in dairy cows with 14-day intravenous infusions of glucagon. J Dairy Sci 1999; 82:1139-52. [PMID: 10386300 DOI: 10.3168/jds.s0022-0302(99)75337-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Twenty multiparous cows were fed additional concentrate during the final 30 d prepartum to cause susceptibility to fatty liver. From 14 to 42 d postpartum, all cows were subjected to a protocol to induce fatty liver and ketosis. To test glucagon as a treatment for fatty liver, either glucagon at 10 mg/d or excipient was infused via the jugular vein from 21 to 35 d postpartum. All cows had fatty liver at 14 d postpartum and became ketonemic and hypoglycemic during the induction of ketosis. Glucagon increased plasma glucose to 142% of that of controls throughout the 14-d treatment. The hypoinsulinemia present in cows with fatty liver was not affected by glucagon. Plasma beta-hydroxybutyrate and nonesterified fatty acids were decreased by glucagon. At 6 d postpartum, liver triacylglycerol averaged 12.9% of liver (wet weight basis). Glucagon had decreased triacylglycerol content of livers by 71% at d 35. Glycogen was 1.0% of the wet weight of livers at 6 d in milk, but it was decreased by glucagon to 0.5% at 2 d after glucagon began. Glycogen then increased in cows treated with glucagon until at 38 d in milk liver glycogen was 3.7% versus 1.6% in controls. Our results document that glucagon decreases the degree of fatty liver in early lactation dairy cows, which also decreases the incidence of ketosis after alleviation of fatty liver.
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Affiliation(s)
- A R Hippen
- Department of Animal Science, Iowa State University, Ames 50011-3150, USA
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24
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She P, Lindberg GL, Hippen AR, Beitz DC, Young JW. Regulation of messenger ribonucleic acid expression for gluconeogenic enzymes during glucagon infusions into lactating cows. J Dairy Sci 1999; 82:1153-63. [PMID: 10386301 DOI: 10.3168/jds.s0022-0302(99)75338-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The effects of glucagon infusions on expression of mRNA for enzymes that regulate gluconeogenesis were studied in lactating cows. Normal cows and cows with fatty liver that were susceptible to ketosis were assigned to either glucagon-treated or control groups. Glucagon at 0 or 10 mg/d was infused for 14 d beginning at d 21 postpartum. In normal cows, glucagon infusions increased concentrations of both plasma glucagon and glucose, which caused plasma insulin to increase. Consequently, hepatic phosphoenolpyruvate carboxykinase mRNA decreased during wk 1 of glucagon infusions. Glucagon infusions into cows with fatty liver also increased plasma glucagon and glucose, but concentrations of plasma insulin and hepatic phosphoenolpyruvate carboxykinase mRNA did not change. More phosphoenolpyruvate carboxykinase mRNA was present in the livers of cows with fatty liver than in livers of normal cows. In a follow-up experiment with midlactation cows, 3.5-h infusions of glucagon at 14 mg/d increased plasma glucose and insulin and decreased plasma nonesterified fatty acids and hepatic glycogen. Hepatic phosphoenolpyruvate carboxykinase mRNA was decreased 41%, pyruvate carboxylase mRNA was increased 50%, but fructose-1,6-bisphosphatase mRNA did not change. We conclude that the expression of the hepatic phosphoenolpyruvate carboxykinase gene in normal cows is inhibited by insulin to balance elevated carbohydrate status during glucagon infusions; however, inhibited expression of hepatic phosphoenolpyruvate carboxykinase mRNA probably is not involved in the pathogenesis of lactation ketosis.
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Affiliation(s)
- P She
- Department of Animal Science, Iowa State University, Ames 50011-3150, USA
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25
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She P, Hippen AR, Young JW, Lindberg GL, Beitz DC, Richardson LF, Tucker RW. Metabolic responses of lactating dairy cows to 14-day intravenous infusions of glucagon. J Dairy Sci 1999; 82:1118-27. [PMID: 10386298 DOI: 10.3168/jds.s0022-0302(99)75335-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Twenty cows were assigned at parturition to two groups to study metabolic effects of continuous intravenous infusions of glucagon. Groups were control cows and cows treated with glucagon at 10 mg/d for 14 d starting at d 21 postpartum. Daily blood samples and nine liver biopsies were taken from d 7 to 49 postpartum. Plasma glucagon increased six- to seven-fold during infusions of treated cows. Plasma insulin was increased heterogeneously by glucagon infusions. Plasma glucose increased 11.5 and 9.0 mg/dl during wk 1 and 2 of glucagon infusions. No other plasma metabolites tested (nonesterified fatty acids, beta-hydroxybutyrate, and urea N) were affected by glucagon infusions. Liver glycogen decreased by d 2 of glucagon infusion but was repleted to preinfusion values by d 7 and increased to 169% of the preinfusion baseline values at 3 d after cessation of glucagon. Milk production decreased transiently during glucagon infusions. Both milk production and milk protein percentage decreased during glucagon infusion, which could imply a decreased availability of amino acids for milk protein synthesis. Feed intakes did not increase during glucagon infusions, which was in contrast to the control group. Results indicated that glucagon infusions caused liver glycogenolysis initially and probably enhanced gluconeogenesis but glucagon did not appear to increase lipolysis from adipose tissue in these early lactating dairy cows.
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Affiliation(s)
- P She
- Department of Animal Science, Iowa State University, Ames 50011-3150, USA
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