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Berlin Green Framework‑Based Gas Sensor for Room‑Temperature and high‑selectivity Detection of Ammonia

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Nano-Micro Letters 2021年第4期13卷 146-158页

作者： Tingqiang Yang Lingfeng Gao Wenxuan Wang Jianlong Kang Guanghui Zhao Delong Li Wen Chen Han Zhang Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‑Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070People’s Republic of China Research Center for Materials Genome Engineering Wuhan University of TechnologyWuhan 430070People’s Republic of China

Ammonia detection possesses great potential in atmosphere environmental protection,agriculture,industry,and rapid medical diagnosis.However,it still remains a great challenge to balance the sensitivity,selectivity,working temperature,and response/recovery speed.In this work,Berlin green(BG)framework is demonstrated as a highly promising sensing material for ammonia detection by both density functional theory simulation and experimental gas sensing investigation.Vacancy in BG framework offers abundant active sites for ammonia absorption,and the absorbed ammonia transfers sufficient electron to BG,arousing remarkable enhancement of resistance.Pristine BG framework shows remarkable response to ammonia at 50–110°C with the highest response at 80°C,which is jointly influenced by ammonia’s absorption onto BG surface and insertion into BG lattice.The sensing performance of BG can hardly be achieved at room temperature due to its high resistance.Introduction of conductive Ti3CN MXene overcomes the high resistance of pure BG framework,and the simply prepared BG/Ti3CN mixture shows high selectivity to ammonia at room temperature with satisfying response/recovery speed.

关键词： Berlin green framework Gas sensor Ammonia Room temperature high selectivity

Fe,Cu-codoped metal-nitrogen-carbon catalysts with high selectivity and stability for the oxygen reduction reaction

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Chinese Chemical Letters 2021年第1期32卷 506-510页

作者： Yuemin Wang Ergui Luo Xian Wang Qinglei Meng Junjie Ge Changpeng Liu Wei Xing Laboratory of Advanced Power Sources Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China Jilin Province Key Laboratory of Low Carbon Chemical Power Sources Changchun 130022China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Metal-nitrogen-carbon materials(M-N-C) are non-noble-metal-based alternatives to platinum-based catalysts and have attracted tremendous attention due to their low-cost,high abundance,and efficient catalytic performance towards the oxygen reduction reaction(ORR).Among them,Fe-based materials show remarkable ORR activity,but they are limited by low selectivity and low stability.To address these issues,herein,we have synthesized FeCu-based M-N-C catalysts,inspired by the bimetal center of cytochrome c oxidase(CcO).In acidic media,the selectivity was notably improved compared with Febased materials,with peroxide yields less than 1.2%(high stability.

关键词： Fuel cell Oxygen reduction reaction Fe Cu-codoped metal-nitrogen-carbon catalysts high selectivity high stability

CuAlCl4 doped MIL-101 as a high capacity CO adsorbent with selectivity over N2

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Frontiers of Chemical Science and Engineering 2014年第3期8卷 340-345页

作者： Yixiu WANG Chao LI Fanchao MENG Shuling LV Jintao GUO Xiaoqin LIU Chongqing WANG Zhengfei MA College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009 China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing University of Technology Nanjing 210009 China

A CuAlCl4 doped metal organic framework, CuAlCl4@MIL-101, was prepared by introducing CuAlCl4 into the pores of MIL-101 for the selective adsorption of CO over N2. The CuAlCl4 molecules were evenly distributed into various pores sizes and did not change the intrinsic structure of the MIL-101. Isotherms for CO and N2 adsorption at 298 K showed that the CO capacity on CuAlCl4@MIL-101 was much higher than that on virgin MIL-101, whereas the N2 capacity decreased. The selectivity for CO over N2 improved from 4.64 to 31.5 at 298 K and 1 bar. The CuAlCl4@MIL-101 adsorbent displayed outstanding CO adsorption stability and the adsorbent could be regenerated by applying a simple vacuum of 4 mmHg.

关键词： metal organic framework CO adsorbent highstability high selectivity CuAlCl4

Removal of iodide anions in water by silver nanoparticles supported on polystyrene anion exchanger

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Journal of Environmental Sciences 2023年第6期128卷 45-54页

作者： Li Li Su-Juan Yu Rong-Gang Zheng Peng Li Qing-Cun Li Jing-Fu Liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances Institute of Environment and HealthJianghan UniversityWuhan 430056China University of Chinese Academy of Sciences Beijing 100049China Department of Ecology and Resources Engineering He Tao CollegeInner Mongolia 015000China

The removal of iodide(I^(−))from source waters is an effective strategy to minimize the formation of iodinated disinfection by-products(DBPs),which are more toxic than their brominated and chlorinated analogues.In this work,a nanocomposite Ag-D201 was synthesized by multiple in situ reduction of Ag-complex in D201 polymer matrix,to achieve highly efficient removal of iodide from water.Scanning electron microscope/energy dispersive spectrometer characterization showed that uniform cubic silver nanoparticles(AgNPs)evenly dispersed in the D201 pores.The equilibrium isotherms data for iodide adsorption onto Ag-D201 was well fitted with Langmuir isotherm with the adsorption capacity of 533 mg/g at neutral pH.The adsorption capacity of Ag-D201 increased with the decrease of pH in acidic aqueous solution,and reached themaximum value of 802 mg/g at pH 2.This was attributed to the oxidization of I^(−),by dissolved oxygen under the catalysis of AgNPs,to I2 which was finally adsorbed as AgI3.However,the aqueous solutions at pH 7–11 could hardly affect the iodide adsorption.The adsorption of I^(−)was barely affected by real water matrixes such as competitive anions(SO_(4)^(2−),NO_(3)^(−),HCO3−,Cl^(−))and natural organic matter,of which interference of NOM was offset by the presence of Ca^(2+).The proposed synergistic mechanism for the excellent performance of iodide adsorption by the absorbent was ascribed to the Donnan membrane effect caused by the D201 resin,the chemisorption of I^(−)by AgNPs,and the catalytic effect of AgNPs.

关键词： Ag-D201 Iodide removal Donnan membrane effect Chemisorption Catalytic effect high selectivity

COMPACT BANDPASS FILTER WITH high selectivity AND WIDE STOPBAND USING SLOTTED STEPPED-IMPEDANCE RESONATOR

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Journal of Electronics(China) 2012年第1期29卷 23-26页

作者： X11Jin JiYuxue MiaoChen WuWen MinisterialKeyLaboratoryofJGMT NanjingUniversityofScienceandTechnologyNanjing210094China

In this paper,a Slotted Stepped-Impedance Resonator (SSIR) is proposed.Due to the slots in the low-impedance section of the conventional SIR,the new resonator has a lower fundamental resonance f0 and can provide a potential finite transmission zero fz close to f0.Based on the proposed SSIR,a fourth-order Chebychev BandPass Filter (BPF) is designed at f0=1 GHz.The measured results show that a better than-65 dB rejection is achieved on both the lower and the upper stopband.Moreover,the new filter has a wide-30 dB rejection upper stopband from 1.13f0 to 6.52f0.The fabricated filter exhibits a size of The new filter has a planar topology and is easily integrated with modern portable communication systems.

关键词： BandPass Filter (BPF) Stepped-Impedance Resonator (SIR) high selectivity Wide stopband

Active plane modulation of Bi_(2)O_(3)nanosheets via Zn substitution for efficient electrocatalytic CO_(2)reduction to formic acid

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Nano Research 2023年第8期16卷 10803-10809页

作者： Yumei Liu Tiantian Wu Hongfei Cheng Jiawen Wu Xiaodong Guo Hong Jin Fan College of Chemical Engineering Sichuan UniversityChengdu 610065China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore School of Chemistry Xi’an Key Laboratory of Sustainable Energy Materials ChemistryState Key Laboratory of Electrical Insulation and Power EquipmentXi’an Jiaotong UniversityXi’an 710049China Institute of Materials Research and Engineering A*STAR2 Fusionopolis WaySingapore 138634Singapore

Formic acid is considered one of the most economically viable products for electrocatalytic CO_(2)reduction reaction(CO_(2)RR).However,developing highly active and selective electrocatalysts for effective CO_(2)conversion remains a grand challenge.Herein,we report that structural modulation of the bismuth oxide nanosheet via Zn^(2+)cooperation has a profound positive effect on exposure of the active plane,thereby contributing to high electrocatalytic CO_(2)RR performance.The obtained Zn-Bi_(2)O_(3)catalyst demonstrates superior selectivity towards formate generation in a wide potential range;a high Faradaic efficiency of 95%and a desirable partial current density of around 20 mA·cm^(-2)are obtained at−0.9 V(vs.reversible hydrogen electrode(RHE)).As proposed by density functional theory calculations,Zn substitution is the most energetically feasible for forming and stabilizing the key OCHO*intermediate among the used metal ions.Moreover,the more negative adsorption energy of OCHO*and the relatively low energy barrier for the desorption of HCOOH*are responsible for the enhanced activity and selectivity.

关键词： electrocatalytic CO_(2)reduction Bi_(2)O_(3)catalyst active plane modulation Zn substitution high selectivity

A pyrazine based metal-organic framework for selective removal of copper from strongly acidic solutions

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Frontiers of Environmental Science & Engineering 2023年第3期17卷 75-86页

作者： Jiachuang Shao Penghui Shao Mingming Peng Min Li Ziwei Yao Xiuqin Xiong Caiting Qiu Yufan Zheng Liming Yang Xubiao Luo Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource utilizationNanchang Hangkong UniversityNanchang 330063China Department of Chemical Engineering Chongqing University of Science and TechnologyChongqing 401331China

The selective capture of copper from strongly acidic solutions is of vital importance from the perspective of sustainable development and environmental protection.Metal organic frameworks(MOFs)have attracted the interest of many scholars for adsorption due to their fascinating physicochemical characteristics,including adjustable structure,strong stability and porosity.Herein,pz-UiO-66 containing a pyrazine structure is successfully synthesized for the efficient separation of copper from strongly acidic conditions.Selective copper removal at low pH values is accomplished by using this material that is not available in previously reported metal–organic frameworks.Furthermore,the material exhibits excellent adsorption capacity,with a theoretical maximum copper uptake of 247 mg/g.As proven by XPS and FT-IR analysis,the coordination of pyrazine nitrogen atoms with copper ions is the dominant adsorption mechanism of copper by pz-UiO-66.This work provides an opportunity for efficient and selective copper removal under strongly acidic conditions,and promises extensive application prospects for the removal of copper in the treatment for acid metallurgical wastewater.

关键词： Pyrazine Metal-organic frameworks Copper removal Strong acidity high selectivity

Facile synthesis of CuO-Co_(3)O_(4)prickly-sphere-like composite for non-enzymatic glucose sensors

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Rare Metals 2022年第6期41卷 1911-1920页

作者： Dong Wang Hua-Min Zhao Li Guo Long Zhang Hong-Bin Zhao Xuan Fang Sheng Li Gong Wang School of Chemical Engineering Northeast Electric Power University Jilin132012.China Department of Nursing.ChangchunPeople's Hospital Changchun130000 China State Key Laboratory of Advanced Materials for Smart Sensing.General Research Institute for Nonferrous Metals Beijing 100088China State Key Laboratory of high Power Semiconductor Lasers School of ScienceChangchun University of Science and TechnologyChangchun 130022China School of Automation Engineering Northeast Electric Power UniversityJilin 132000China

In the field of glucose sensors,the development of inexpensive and high-efficiency electrochemical glucose sensors is the current research hotspot.In this paper,CuO-Co_(3)O_(4)composite with a prickly-sphere-like morphology is prepared by the facile hydrothermal method for the non-enzymatic electrochemical glucose detection.X-ray diffraction,scanning electron microscopy,transmission electron microscopy,energy-dispersive X-ray spec-troscopy,and X-ray photoelectron spectroscopy are used to analyze the structure,composition,and morphology of the material.In addition,the electrochemical catalytic perfor-mance of CuO-Co_(3)O_(4)to glucose is obtained by cyclic voltammetry and chronoamperometry.The excellent elec-trochemical sensing performance may be attributed to the large number of catalytic sites in the prickly-sphere-like composite and the synergistic effect of Cu and Co.Under an applied voltage of 0.55 V,CuO-Co_(3)O_(4)composite shows sensitivity to glucose(1503.45μA·(mmol·L^(-1))^(-1)-cm^(-2)),a low detection limit(21.95μmol·L^(-1)),excellent selectivity,a high level of reproducibility,and good sta-bility.This indicates that the CuO-Co_(3)O_(4)composite has a broad prospect of non-enzymatic glucose sensing application.

关键词： CuO-Co_(3)O_(4)nanowire Prickly-sphere-like morphology Non-enzymatic glucose sensor high selectivity

Tunable bismuth doping/loading endows NaTaO_(3)nanosheet highly selective photothermal reduction of CO_(2)

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Nano Research 2023年第2期16卷 2142-2151页

作者： Mengmeng Zhang Changhua Wang Yueyun Wang Songmei Li Xintong Zhang Yichun Liu Key Laboratory of Ultraviolet(UV)-Emitting Materials and Technology of Chinese Ministry of Education Northeast Normal UniversityChangchun 130024China

Photothermal CO_(2)reduction with H2O,integrating advantages of photocatalysis driven H2O splitting and thermal catalysis promoted CO_(2)reduction,has drawn sharply increasing attention in artificial synthesis of solar fuels.The photothermal effect of metal nanoparticles facilities CO_(2)hydrogenation and activation of lattice oxygen in oxide photocatalyst promotes H2O oxidation,which is essentially considered for highly efficient photothermal catalysis.However,the large thermal conductivity of most metal nanoparticles induces inevitable heat dissipation,restricting the increase of catalyst temperature.In this work,to minimize the heat dissipation,we employ bismuth nanoparticles as photothermal unit,which is of the lowest thermal conductivity in the metal family.Meanwhile,we adopt bismuth doped NaTaO_(3)as photocatalytic unit because of the bismuth doping induced activation of lattice oxygen.The bismuth nanoparticles are assembled with bismuth doped NaTaO_(3)through one-step tunable transformation from Bi4TaO8Cl.Benefiting from the photothermal effect,thermal insulation caused by bismuth metal,and lattice oxygen activation by bismuth doping,the NaTaO_(3):Bi hybrid exhibits high photothermal catalytic performance.The yield of CO over NaTaO_(3):Bi hybrid at 413 K via photothermal catalysis is 141 times higher than that room temperature photocatalysis.Further,ultraviolet(UV)light irradiation leads to 89.2%selectivity of CO and visible light irradiation leads to 97.5%selectivity of CH4.This work may broaden the photocatalytic application of ABO_(3)perovskite and provides a novel strategy for the development of photothermal catalysts for artificial photosynthesis.

关键词： CO_(2)reduction photothermal catalytic NaTaO_(3) bismuth high selectivity