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CCS Chemistry 2024年第1期6卷 100-109页

作者： Zhonghao Tan Jianling Zhang Yisen Yang Jiajun Zhong Yingzhe Zhao Jingyang Hu Yanyue Wang zhuizhui su Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049

Electrochemical reduction of CO_(2) to formic acid(HCOOH)is an important route for storing renewable energy and achieving carbon neutrality.Herein,we propose the continuous production of HCOOH solution from electrocatalytic CO_(2) reduction using highly mesoporous bismuth oxide(Bi_(2)O_(3))nanosheets as an electrocatalyst and membrane electrode assembly with solid-state electrolyte as an electrolyzer.Precisely,0.1 M of HCOOH solution could be produced continuously at a current density of -56 mA cm^(-2) for at least 43 h.The underlying mechanism for the high performance of the electrocatalytic system was investigated by experimental studies and theoretical calculations.

关键词： CO_(2)electroreduction formic acid Bi_(2)O_(3)nanosheet solid-state electrolyte Zn-CO_(2)battery

Ferric acetylacetonate/covalent organic framework composite for high performance photocatalytic oxidation

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Green Energy & Environment 2022年第6期7卷 1281-1288页

作者： Mingzhao Xu Lifei Liu Jianling Zhang Fanyu Zhang Gang Chen Qiang Wan Yufei Sha Xiuyan Cheng zhuizhui su Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China School of Chemistry and Chemical Engineering University of Chinese Academy of SciencesBeijing100049China School of Chemical Sciences University of Chinese Academy of SciencesPhysical Science LaboratoryHuairou National ComprehensiveScience CenterBeijing100190China

Ferric acetylacetonate/covalent organic framework(Fe(acac)_(3)/COF)composite was synthesized by interfacial polymerization method at room temperature.The crystal structure,morphology and porosity property of the composite were characterized by X-ray diffraction,scanning electron microscope,transmission electron microscope and nitrogen adsorption.The interaction between Fe(acac)_(3) and COF was investigated by Fourier transform infrared spectra and X-ray photoelectron spectroscopy.The Fe(acac)_(3)/COF composite was used as a photocatalyst for the oxidation of benzyl alcohol under mild conditions.It exhibits high activity and selectivity for the reaction,of which the mechanism was investigated by determining its photoelectric properties.The Fe(acac)_(3)/COF catalyst developed in this work has application potential in other photocatalytic reactions.

关键词： Covalent organic framework Photocatalysis Hybrid catalyst Benzyl alcohol oxidation Interfacial polymerization

Ultra-small UiO-66-NH_(2)nanoparticles immobilized on g-C_(3)N_(4)nanosheets for enhanced catalytic activity

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Green Energy & Environment 2022年第3期7卷 512-518页

作者： zhuizhui su Bingxing Zhang Xiuyan Cheng Fanyu Zhang Qiang Wan Lifei Liu Xiuniang Tan Dongxing Tan Lirong Zheng Jianling Zhang Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China School of Chemical Sciences University of Chinese Academy of SciencesPhysical Science LaboratoryHuairou National ComprehensiveScience CenterBeijing100190China Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China

UiO-66-NH_(2),an important metal-organic framework,is usually synthesized by solvothermal method and the particle size is generally larger than 200 nm,which limits its catalytic applications in chemical reactions.It is very meaningful to produce UiO-66-NH_(2) nanoparticles with ultrasmall size,but remains challenging.Herein,we synthesized UiO-66-NH_(2) nanoparticles in size of 8-15 nm that are immobilized on g-C_(3)N_(4)nanosheets.Compared with the UiO-66-NH_(2) synthesized by the traditional solvothermal method(>200 nm),the ultra-small UiO-66-NH_(2) nanoparticles immobilized on g-C_(3)N_(4)have more unsaturated coordination positions and increased Lewis acidity.Owing to these combined advantages,the ultra-small UiO-66-NH_(2)nanoparticles exhibit greatly improved catalytic activity for Meerwein-Ponndorf-Verley reaction than larger UiO-66-NH_(2)particles.

关键词： particles catalytic meaningful

Mesoporous Cu_(3−x)Zn_(x)(BTC)_(2)nanocubes synthesized in deep eutectic solvent and their catalytic performances

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Nano Research 2023年第3期16卷 3703-3708页

作者： Jingyang Hu Jianling Zhang Xiuniang Tan Xiuyan Cheng zhuizhui su Lixiong Qian Mingzhao Xu Yufei Sha Yanyue Wang Yisen Yang Yunpeng Liu Guang Mo Xueqing Xing Zhonghua Wu Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

To develop high-performance metal-organic frameworks(MOFs)for catalysis is of great importance.Here,we synthesized the mesoporous Cu_(3−x)Zn_(x)(BTC)_(2)(BTC=benzene-1,3,5-tricarboxylate)nanocubes in a deep eutectic solvent of ZnCl_(2)/ethylene glycol solution.The route can proceed at room temperature and the reaction time needed is shortened to be 30 min,which is superior to the conventional solvothermal route that usually needs high temperature and long reaction time.The formation mechanism of the mesoporous Cu_(3−x)Zn_(x)(BTC)_(2)nanocubes in deep eutectic solvent(DES)was investigated by in situ synchrotron X-ray diffraction/small angle X-ray scattering/X-ray absorption fine structure conjunction technique.The mesoporous Cu_(3−x)Zn_(x)(BTC)_(2)nanocubes exhibit high catalytic activity and reusability for cyanosilylation reaction of benzaldehyde and aerobic oxidation reaction of benzylic alcohol.

关键词： bimetallic metal-organic framework(MOF) mesoporous nanocubes deep eutectic solvent formation mechanism catalytic performance

Ionic liquids produce heteroatom-doped Pt/TiO2 nanocrystals for efficient photocatalytic hydrogen production

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Nano Research 2019年第8期12卷 1967-1972页

作者： Xiuniang Tan Jianling Zhang Dongxing Tan Jinbiao Shi Xiuyan Cheng Fanyu Zhang Lifei Liu Bingxing Zhang zhuizhui su Buxing Han Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Physical Science Laboratory Huairou National Comprehensive Science CenterBeijing 101400China

It is of great importance to develop facile strategies to synthesize catalysts with desirable compositions and structures for high-performance photocatalytic hydrogen generation. In this work, we put forward an ionic liquid assisted one-pot route for the synthesis of heteroatom-doped Pt/TiO2 composite material. This route is simple, environmentally benign and adjustable owing to the designable properties of ionic liquids. The as-synthesized Pt/TiO2 nanocrystals exhibit high activity and stability for the photocatalytic hydrogen generation under simulated solar irradiation. This method can be easily applied to the synthesis of various kinds of metal/TiO2 composites doped with desirable heteroatoms (e.g., F, Cl, Br, etc).

关键词： ionic liquid titanium dioxide platinum heteroatom photocatalyst

施肥方式对幼龄楸树非结构性碳器官分配和生长季动态的影响

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西北植物学报 2022年第8期42卷 1355-1362页

作者：关追追卢奇锋陈动邱权苏艳李吉跃何茜广东省森林植物种质创新与利用重点实验室华南农业大学林学与风景园林学院广州510642

以6年生楸树无性系‘9-1’为试验材料,采用水肥一体化、穴施和不施肥(对照)3种施肥方法,分析施肥对楸树生长、各器官非结构性碳(NSC)含量及时间动态变化的影响,探究楸树NSC分配对施肥的响应机制,为评估楸树单株和林分碳储量提供理论依... 详细信息

以6年生楸树无性系‘9-1’为试验材料,采用水肥一体化、穴施和不施肥(对照)3种施肥方法,分析施肥对楸树生长、各器官非结构性碳(NSC)含量及时间动态变化的影响,探究楸树NSC分配对施肥的响应机制,为评估楸树单株和林分碳储量提供理论依据。结果表明:(1)连续施肥4年后,与对照相比,穴施处理的树高和胸径分别提高了4.7%和7.1%,水肥一体化处理则分别提高了7.1%和20.5%,水肥一体化的施肥效果更佳。(2)不同施肥方式并未显著改变楸树各器官中可溶性糖含量,但是水肥一体化施肥明显提高了根中淀粉和总NSC的积累;可溶性糖和总NSC在叶和粗根中分布较多,淀粉则在根中含量较高。(3)不同施肥方式并未显著改变楸树各生长时期可溶性糖含量,但水肥一体化施肥明显提高了生长初期和末期淀粉和总NSC含量。研究发现,在整个生长季中,楸树叶中可溶性糖和总NSC一直被消耗,枝中可溶性糖一部分被消耗用于支持叶片生长,一部分以淀粉的形式进行储存,而根系接受源自叶和枝的NSC后转化为淀粉储存起来帮助树木抵抗低温环境;楸树遵循“碳消耗(初期)-碳消耗(中期)-碳积累(末期)”的NSC分配策略;应用水肥一体化技术可显著提高楸树生物量和生产力,在今后林木施肥试验中值得优先考虑。

关键词：楸树碳分配时间变化水肥一体化生产力

楸树树干节子的空间分布特征及其面积预测模型

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中南林业科技大学学报 2021年第10期41卷 20-28页

作者：关追追卢奇锋何双玉邱权麻文俊苏艳王军辉李吉跃何茜华南农业大学林学与风景园林学院广东省森林植物种质创新与利用重点实验室广东广州510642 中国林业科学研究院林业研究所国家林业局林木培育重点实验室北京100091

【目的】为研究节子空间分布特征以及节子属性对干材质量的影响。【方法】以河南省洛宁县地区楸树人工林为研究对象,采用树干解析和节子剖析技术,获取了7株解析木和355个节子数据。本研究分析了节子的空间分布特征,通过逐步回归分析,筛... 详细信息

【目的】为研究节子空间分布特征以及节子属性对干材质量的影响。【方法】以河南省洛宁县地区楸树人工林为研究对象,采用树干解析和节子剖析技术,获取了7株解析木和355个节子数据。本研究分析了节子的空间分布特征,通过逐步回归分析,筛选主导因子建立预测节子面积的多元线性回归模型。同时通过主成分分析,筛选出评判干材质量的关键节子指标。【结果】1)水平方向上,楸树节子数量主要分布于树干南向,占比59.4%,数量高于北向(占比40.6%);垂直方向上,节子数量在树干高度10.0 m以下分布居多,占比61.4%;节子平均直径随着树干高度增加而增大,在树干高度7.6~10.0 m处达到最大,为4.2 cm,随后节子平均直径逐渐降低。2)通过逐步回归分析,筛选出节子周长(KP)、节子直径(KD)、节子半径(KR)和节子角度(KI)等4个影响节子面积的主导因子,并建立节子面积的多元线性回归模型:Y_(KA)=-62.357+3.123X_(KP)+5.829X_(KD)-4.969X_(KR)+0.633X_(KI)(F=258.798,R^(2)=0.877,P<0.01)。3)节子面积与节子周长、节子半径、节子直径以及节子长度等呈正相关,与节子角度呈负相关。节子周长与节子直径、节子半径以及节子长度呈正相关,与节子角度呈负相关。4)通过主成分分析,筛选出节子面积、节子周长、节子长度和节子宽度4个主要指标,可对楸树干材质量进行综合评价。【结论】可通过节子周长、节子直径、节子半径和节子角度对节子面积大小进行预测,利用节子面积模型来预测楸树节子对干材质量的影响情况。

关键词：楸树节子空间分布节子面积预测模型干材质量

楸树人工林生长规律及其最优生长模型研究——以河南省洛宁县楸树为例

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森林工程 2021年第2期37卷 1-10页

作者：关追追赵江宁邱权麻文俊王少明冯小静苏艳王军辉李吉跃何茜广东省森林植物种质创新与利用重点实验室(华南农业大学林学与风景园林学院) 广州510642 国家林业和草原局林木培育重点实验室(中国林业科学研究院林业研究所) 北京100091 国有洛宁县全宝山林场河南洛阳471000 国有洛宁县吕村林场河南洛阳471000

为更系统地研究楸树的生长规律,进一步确定其速生期和最优生长模型,以河南省洛宁县树龄18~37年生的楸树为研究对象,通过树干解析获取树木的生长数据,应用系列模型对树高、胸径和材积生长过程进行拟合,筛选出楸树最优生长模型。研究结果... 详细信息

为更系统地研究楸树的生长规律,进一步确定其速生期和最优生长模型,以河南省洛宁县树龄18~37年生的楸树为研究对象,通过树干解析获取树木的生长数据,应用系列模型对树高、胸径和材积生长过程进行拟合,筛选出楸树最优生长模型。研究结果表明:①树高总生长量随着树龄的增加呈抛物线型增加形式,胸径总生长量呈S型曲线增加形式,材积总生长量呈J型曲线增加形式;前15 a为树高速生期,平均生长速率为0.715 m/a,3~15 a为胸径快速生长期,此阶段平均生长速率为1.083 cm/a;材积连年生长量与平均生长量曲线在37 a时未相交,此时楸树未达到数量成熟,不宜进行采伐;②树高的最优生长模型为修正Weibull与Mitscherlich模型,决定系数R 2达到0.999;胸径的最优生长模型为修正Weibull模型,R 2达到0.995;材积的最优生长模型为Gompertz与Richards模型,R 2达到0.998。将树木生长指标实测值与模型拟合值进行线性拟合,发现两者相关性十分显著(P<0.01),R 2超过了0.990。从而得到结论,河南省洛宁县楸树的速生期是在造林后前15 a,轮伐期应超过37 a,利用树木生长的最优模型能够准确预测楸树的生长规律。

关键词：楸树树干解析生长模型生长规律数量成熟