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Enhanced photocatalytic N_(2) fixation using KNbO3/Bi_(4)O_(5)Br_(2) type Ⅱ heterojunction

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 85-97页

作者： Lin Yue Zhihao Zeng Xujie Ren Shude Yuan Chuanqi Xia Xin Hu leihong zhao Lvchao Zhuang Yiming He Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China Department of Materials Science and Engineering Zhejiang Normal UniversityJinhua 321004China

The fabrication of heterojunction catalysts is an effective strategy to enhance charge separation efficiency,thus boosting the performance of *** work presents the synthesis and investigation of a novel KNbO_(3)/Bi_(4)O_(5)Br_(2) heterostructure catalyst for photocatalytic N_(2)-to-NH_(3) conversion under light *** morphology analysis revealed KNbO_(3) microcubes embedded within Bi_(4)O_(5)Br_(2) nanosheets,the composite exhibited no significant improvement in specific surface area or optical property compared to Bi_(4)O_(5)Br_(2) due to the relatively wide band gap and low surface area of KNbO_(3).The main contribution lies in the enhanced separation efficiency of photogenerated electrons and ***,the band structure analysis suggests that KNbO_(3) and Bi_(4)O_(5)Br_(2) exhibit suitable band potentials to form a type II *** from the higher Fermi level of KNbO_(3) than Bi_(4)O_(5)Br_(2),the electron drift at the contact region thus occurs and leads to the formation of a built-in electric field with the direction from KNbO_(3) to Bi_(4)O_(5)Br_(2),accelerating electron migration and improving the operational efficiency of the ***,the KNbO_(3)/Bi_(4)O_(5)Br_(2) catalyst shows an increased photoactivity,achieving an NH_(3) generation rate 1.78 and 1.58 times those of KNbO_(3) and Bi_(4)O_(5)Br_(2),*** work may offer valuable insights for the design and synthesis of heterojunction composite photocatalysts.

关键词： KNbO_(3)/Bi_(4)O_(5)Br_(2) heterojunction photocatalytic N_(2)fixation charge separation

Facile preparation of Ag_(2)S/KTa_(0.5)Nb_(0.5)O_(3) heterojunction for enhanced performance in catalytic nitrogen fixation via photocatalysis and piezo-photocatalysis

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Green Energy & Environment 2023年第6期8卷 1630-1643页

作者： Lu Chen Junfeng Wang Xiaojing Li Jiayu Zhang Chunran zhao Xin Hu Hongjun Lin leihong zhao Ying Wu Yiming He Department of Materials Science and Engineering Zhejiang Normal UniversityYingbin Road 688Jinhua321004China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityYingbin Road 688Jinhua321004China College of Geography and Environmental Sciences Zhejiang Normal UniversityJinhua321004China

In this work, a novel heterojunction composite Ag_(2)S/KTa_(x)Nb_(1-x)O_(3)was designed and synthesized through a combination of hydrothermal and precipitation procedures. The Ta/Nb ratio of the KTa_(x)Nb_(1-x)O_(3)and the Ag_(2)S content were optimized. The best 0.5% Ag_(2)S/KTa_(0.5)Nb_(0.5)O_(3)(KTN) sample presents an enhanced photocatalytic performance in ammonia synthesis than KTN and Ag_(2)S. Under simulated sunlight, the NH_(3)generation rate of 0.5% Ag_(2)S/KTN reaches 2.0 times that of pure KTN. Under visible light, the reaction rate ratio of the two catalysts is ***, XPS, and TEM analysis revealed that Ag2S was intimately decorated on the KTN nanocubes surface, which promoted the electron transfer between the two semiconductors. The band structure investigation indicated that the Ag_(2)S/KTN heterojunction established a type-Ⅱ band alignment with intimate contact, thus realizing the effective transfer and separation of photogenerated carriers. The change in charge separation was considered as the main reason for the enhanced photocatalytic performance. Interestingly, the Ag_(2)S/KTN composite exhibited higher NH3generation performance under the combined action of ultrasonic vibration and simulated sunlight. The enhanced piezo-photocatalytic performance can be ascribed that the piezoelectric effect of KTN improved the bulk separation of charge carriers in KTN. This study not only provides a potential catalyst for photocatalytic nitrogen fixation but also shows new ideas for the design of highly efficient catalysts via semiconductor modification and external field coupling.

关键词： Photocatalytic nitrogen fixation Ag_(2)S/KTa_(0.5)Nb_(0.5)O_(3) Type-II heterojunction Piezo-photocatalysis Charge separation

Application of Ag/AgBr/GdVO_4 composite photocatalyst in wastewater treatment

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Journal of Environmental Sciences 2018年第1期30卷 68-75页

作者： Xin Zhang Chenghao Wang Chengxi Yu Botao Teng Yiming He leihong zhao Maohong Fan College of Chemistry and Life Sciences Zhejiang Normal University Department of Materials Science and Engineering Zhejiang Normal University Department of Chemical & Petroleum Engineering University of Wyoming

Ag/AgBr/GdVO_4 composite photocatalysts were designed and synthesized in this *** physical and chemical structures, as well as optical properties of the synthesized composite were investigated via XRD, XPS, TEM, and UV–vis. It is found that the composite showed a ternary heterojunction structure of Ag, Ag Br and GdVO_4. Meanwhile, it has a high intensity of light current, indicating its high separation efficiency of electron and *** oxidation of rhodamine B（RhB） under visible light irradiation was performed to investigate the activity of the Ag/Ag Br/GdVO_4 composite. Result indicates that it shows excellent photocatalytic activity. Under visible light irradiation for 12 min, about 80% of Rh B（30 μmol/L） was degraded. The degradation rate is estimated to be 0.253 min1, which is three times higher than that of pure AgBr. The high photoactivity can be ascribed to the synergetic effect of Ag Br, GdVO_4, and Ag nanoparticle in separation of electron–hole pairs.

关键词： Photocatalysis GdVO4 AgBr Composite material

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“人机共存”紫外灯研制及杀菌试验研究

中国照明电器 2024年第7期 6-8页

作者：杜丽华田秀兵赵雷红潘冬宁青岛市光电工程技术研究院山东青岛266109

遵循安全、消杀高效并且安装方便的原则,设计出一款发光波长为222 nm的紫外灯。其主要由光源、滤光片、反光罩、电路模块和外壳构成。并将该紫外灯置于充满白色葡萄球菌气溶胶的封闭气室中进行杀菌试验。结果表明:紫外灯在封闭气室中持... 详细信息

遵循安全、消杀高效并且安装方便的原则,设计出一款发光波长为222 nm的紫外灯。其主要由光源、滤光片、反光罩、电路模块和外壳构成。并将该紫外灯置于充满白色葡萄球菌气溶胶的封闭气室中进行杀菌试验。结果表明:紫外灯在封闭气室中持续照射2 h后,几乎没有存活的白色葡萄球菌。发光波长为222 nm的紫外灯对白色葡萄球菌具有良好杀灭效果,在室内杀菌消毒方面具有应用前景。

关键词：紫外灯 222 nm远紫外线白色葡萄球菌杀菌效果

High piezo/photocatalytic efficiency of Ag/Bi_(5)O_(7)I nanocomposite using mechanical and solar energy for N2 fixation and methyl orange degradation

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Green Energy & Environment 2023年第1期8卷 283-295页

作者： Lu Chen Wenqian Zhang Junfeng Wang Xiaojing Li Yi Li Xin Hu leihong zhao Ying Wu Yiming He Department of Materials Science and Engineering Zhejiang Normal UniversityJinhua321004China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua321004China

In this work,Ag/Bi_(5)O_(7)I nanocomposite was prepared and firstly applied in piezo/photocatalytic reduction of N2 to NH3 and methyl orange(MO)***_(5)O_(7)I was synthesized via a hydrothermal-calcination method and shows nanorods *** nanoparticles(NPs)were photo deposited on the Bi_(5)O_(7)I nanorods as electron trappers to improve the spatial separation of charge carriers,which was confirmed via XPS,TEM,and electronic chemical *** catalytic test indicates that Bi_(5)O_(7)I presents the piezoelectric-like behavior,while the loading of Ag NPs can strengthen the *** ultrasonic vibration,the optimal Ag/Bi_(5)O_(7)I presents high efficiency in MO *** degradation rate is determined to be 0.033 min1,which is 4.7 folds faster than that of Bi_(5)O_(7)*** Ag/Bi_(5)O_(7)I also presents a high performance in piezocatalytic N2 *** piezocatalytic NH3 generation rate reaches 65.4 μmol L^(-1)g^(-1)h^(-1)with water as a hole *** addition of methanol can hasten the piezoelectric catalytic ***,when ultrasonic vibration and light irradiation simultaneously act on the Ag/Bi_(5)O_(7)I catalyst,higher performance in NH3 generation and MO degradation is ***,due to the weak adhesion of Ag NPs,some Ag NPs would fall off from the Bi_(5)O_(7)I surface under long-term ultrasonic vibration,which would greatly reduce the piezoelectric catalytic *** result indicates that a strong binding force is required when preparing the piezoelectric composite *** current work provides new insights for the development of highly efficient catalysts that can use multiple energies.

关键词： Ag/Bi_(5)O_(7)I Piezocatalysis Photocatalysis N2 fixation MO degradation

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SOLO分类评价法及其应用

上海教育科研 2005年第10期 56-58页

作者：宋洁赵雷洪浙江师范大学化学与生命科学学院 321004

传统的教育评价中对量的考核多于对质的评判.教育质量的优劣,学生成绩的好坏,常常以学生掌握知识点的多少作为尺度.SOLO分类评价法是由比格斯(***)教授首倡,是一种以等级描述为基本特征的质性评价方法,在海外有广泛的应用①.

关键词：评价法应用分类教育质量学生成绩教育评价评价方法基本特征知识点

普通高中教师在计算机辅助化学教学中基本情况的调查分析

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现代教育技术 2007年第7期17卷 85-89页

作者：宋洁赵雷洪上海电机学院电子信息学院上海200240 浙江师范大学化学与生命科学学院浙江金华321004

为了更好地发挥计算机在辅助化学教学中的作用,问卷调查了普通高中教师在计算机辅助化学教学中的基本情况。说明在化学教学中开展计算机辅助具有一定的条件支持,教师可以考虑开展基于积件的计算机辅助教学,选择适当的教学内容进行,并与... 详细信息

为了更好地发挥计算机在辅助化学教学中的作用,问卷调查了普通高中教师在计算机辅助化学教学中的基本情况。说明在化学教学中开展计算机辅助具有一定的条件支持,教师可以考虑开展基于积件的计算机辅助教学,选择适当的教学内容进行,并与传统教学方式达到最佳组合,多进行师生间的沟通,从而使计算机辅助教学能够更好地促进学生的发展。

关键词：计算机辅助化学教学高中教师调查

Combination of binary active sites into heterogeneous porous polymer catalysts for efficient transformation of CO_(2) under mild conditions

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Chinese Journal of Catalysis 2021年第4期42卷 618-626页

作者： Zhifeng Dai Yongquan Tang Fei Zhang Yubing Xiong Sai Wang Qi Sun Liang Wang Xiangju Meng leihong zhao Feng-Shou Xiao Department of Chemistry College of ScienceZhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina Key Laboratory of Applied Chemistry of Zhejiang Province and Department of Chemistry Zhejiang UniversityHangzhou 310028ZhejiangChina Key Lab of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Institute of Advanced Materials College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022JiangxiChina Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life ScienceZhejiang Normal UniversityJinhua 321004ZhejiangChina

The transformation of CO_(2)into cyclic carbonates via atom-economical cycloadditions with epoxides has recently attracted tremendous *** one hand,though many heterogeneous catalysts have been developed for this reaction,they typically suffer from disadvantages such as the need for severe reaction conditions,catalyst loss,and large amounts of soluble *** the other hand,the development of heterogeneous catalysts featuring multiple and cooperative active sites,remains challenging and *** this study,we prepared a series of porous organic catalysts(POP-PBnCl-TPPMg-x)via the copolymerization metal-porphyrin compounds and phosphonium salt monomers in various *** resulting materials contain both Lewis-acidic and Lewis-basic active *** molecular-level combination of these sites in the same polymer allows these active sites to work synergistically,giving rise to excellent performance in the cycloaddition reaction of CO_(2)with epoxides,under mild conditions(40℃ and 1 atm CO_(2))in the absence of soluble ***-PBnCl-TPPMg-12 can also efficiently fixate CO_(2)under low-CO_(2)-concentration(15%v/v N2)conditions representative of typical CO_(2)compositions in industrial exhaust *** importantly,this catalyst shows excellent recyclability and can easily be separated and reused at least five times while maintaining its *** view of their heterogeneous nature and excellent catalytic performance,the obtained catalysts are promising candidates for the transformation of industrially generated CO_(2)into high value-added chemicals.

关键词： Copolymerization Porous organic polymers Binary active sites Carbon dioxide fixation Heterogeneous catalysis

基于化学核心素养的教学设计——以“SO_2的性质和作用”为例

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化学教学 2019年第1期 46-51页

作者：戴维赵雷洪浙江师范大学教师教育学院浙江金华321004

基于2017新课程标准理念,参照其中的教学案例设计,在教学实践中,通过一种"手掌"模型的创新表达方式,以"SO_2的性质和作用"教学内容为例进行阐述,以期帮助化学教师对高中化学学科核心素养形成更为生动、直观的认识,从而指导学生在学习化... 详细信息

基于2017新课程标准理念,参照其中的教学案例设计,在教学实践中,通过一种"手掌"模型的创新表达方式,以"SO_2的性质和作用"教学内容为例进行阐述,以期帮助化学教师对高中化学学科核心素养形成更为生动、直观的认识,从而指导学生在学习化学的过程中化学核心素养得到更好的落实和发展。

关键词：化学核心素养 “手掌”模型 SO2的性质