检索结果-南通市图书馆

Chinese Journal of Chemical Physics 2014年第6期27卷 725-731,I0004页

作者：林雪郭晓宇赵世铎高新翟宏菊王庆伟常立民吉林师范大学环境友好材料制备与应用教育部重点实验室四平136000

Novel Bi2WO6-bipo4 photocatalysts with heterojunction structure were fabricated through a facile hydrothermal route. The photocatalytic properties of Bi2WO6-bipo4 composites were evaluated by photocatalytic degradation of rhodamine B （Rh B） under simulated sunlight irradiation. The results showed that Bi2WO6-bipo4 photocatalysts displayed much higher photocatalytic performances for Rh B degradation than the single bipo4 and Bi2WO6. The best photocatalytic activity of Bi2WO6-bipo4 with nearly 100% Rh B degradation located at molar ratio of 1：1 after 20 min irradiation. The enhanced photo-catalytic performance could be mainly ascribed to the formation of heterojunction interface in Bi2WO6-bipo4 which facilitated the transfer and separation of photogenerated electron-hole pairs, as well as the strong visible light absorption originating from the sensitization role of Bi2WO6 to bipo4. It was also found that the photodegradation of Rh B molecules was mainly attributed to the oxidation action of the generated O2^· - radicals and partly to the action of hvb^＋ via direct hole oxidation process.

关键词： Bi2WO6 bipo4 Heterojunction Photocatalytic activity Mechanism

Origin of Photocatalytic Activity of bipo4： the First-principles Calculations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2017年第8期36卷 1299-1306页

作者：祝林马新国危阳楚亮王辉虎黄楚云 School of Science Hubei University of Technology Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy Hubei University of Technology School of Science Nanjing University of Posts and Telecommunications

Geometric and electronic structures of three polymorphs of bipo4（m MBIP, n MBIP and HBIP） have been investigated by the first-principles calculations. The results show that PO4 tetrahedron in n MBIP is distorted most, and m MBIP possesses minimum effective mass of carriers in three polymorphs of bipo4. Further, the leading role of inductive effect of dipole moment or effective mass of carries in the separation of electron-hole pairs is analyzed. Based on the fact that n MBIP has higher photocatalytic activity than m MBIP, it can be inferred that the inductive effect of dipole moment deriving from distorted PO4 tetrahedron is the dominant factor affecting the separation efficiency of carries. The calculated results represent that n MBIP has more appropriate redox potential and narrower band gap than others. These findings may provide meaningful guidance for further understanding on the relationship between unique crystal structure and photocatalytic activity of bipo4.

关键词： bipo4 photocatalysis the first-principles calculations

Synthesis, Photoluminescence and Photocatalytic Performance of bipo4 with Different Phase Structures

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2013年第3期29卷 556-562页

作者： WANG Yun-jian LI Li-ping ZHENG Jing HUANG Xin-song LI Guang-she State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 P. R. China Graduate University of Chinese Academy of Sciences Beijing 100049 P. R. China

Three kinds of crystal phase bipo4（HP, LTBP, and HTBP） were selectively synthesized by controlling the preparation conditions. Structures of the three samples are all constructed by PO4 and BiO8 polyhedra but with different geometric structures. Detailed characterization was carried out by X-ray diffraction（XRD）, scanning eletron microscopy（SEM） and Raman, UV-Vis, and luminescence spectrometries. Three samples exhibit huge distinctions in their photoluminescence（PL） lifetime： 0.68, 162 and 160 μs for HP, LTBP, and HTBP, respectively. More interesting, an outstanding photocatalytic activity is observed for as-prepared LTBP nanorod, which shows even higher activity for the degradation of MB solution than P25. In addition, experiments were carried out to clarify the role of hydroxyl （OH） and superoxide radicals（O2·） played in photocatalytic process and it was found O2·was the main active species in bipo4 photocatalysts. Further comparison of structural and photocatalytic properties of the three samples finds that structure distortion is contributed to their property difference. A correlation was found between photocatalytic performance and the distortion of BiO8 dodecahedra. The internal field generated by the distortion of BiO8 dodecahedra was believed advantageous for the separation of electron and hole, which was in favor of the improvement of photocatalytic activity. This correlation may help to design other photocatalysts with high activity.

关键词： bipo4 Photoluminescence Photocatalysis -

Enhanced Photocatalytic Activity of bipo4 Photocatalyst by Surface Modification of Fe(Ⅲ)Cocatalyst

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2018年第4期33卷 871-875页

作者：汪畅 QIN Xuan 林杉 Institute of Environment and Health Jianghan University The Fifth Hospital of Wuhan College of Resources and Environment Huazhong Agricultural University

Metal ions like Fe（Ⅲ） were testified to be efficient co-photocatalyst in the field of environmental governance. Hence, a series of bipo_4/Fe（Ⅲ） materials were prepared via a hydrothermal method and impregnation. The experimental results indicated that normal organic dye was effectively removed by bipo_4 with the presence of Fe（Ⅲ） as a co-photocatalyst. The enhanced removal mechanism was attributed to the easy transfer of photo-induced electron-hole pairs and relatively high productivity of active redical by synergism of Fe（Ⅲ）.

关键词： bipo4 Fe(Ⅲ) nanostructures synergism photocatalysis

Photocatalytic degradation of benzene in gas phase by nanostructured bipo4 catalysts

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2012年第6期22卷 644-653页

作者： Baihua Long Jianhui Huang Xinchen Wang Research Institute of Photocatalysis State Key Laboratory Breeding Base of PhotocatalysisFuzhou University Department of Environment and Life Sciences Putian University

A rod-shaped bipo4photocatalyst was prepared by a simple hydrothermal method for light-induced catalytic degradation of stable aromatic compounds such as benzene in gas phase under ambient *** samples were subjected to various technical characterizations including X-ray diffraction（XRD）,transmission electron microscopy（TEM）,UV/vis and FTIR spectrum,to determine the crystal structure,morphology,and optical properties of the as-prepared *** indicate that bipo4exhibits much higher photocatalytic activity and stability under UV light irradiation than that of commercial TiO2（Degussa P25） in the degradation of benzene to *** active radical species involved in the degradation reactions over bipo4photocatalyst have been investigated by the spin-trapping electron paramagnetic resonance（EPR） spectra and a photoluminescence *** calculations reveal that bipo4contains highly-dispersive conduction bands,enabling high mobility of the photo-generated carries and therefore leading to fast charge transfer and separation.

关键词： Photocatalyst bipo4 Environmental purification

Preparation of bipo4/graphene photoelectrode and its photoelectrocatalyitic performance

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2020年第2期41卷 302-311页

作者： Zetian He Sen Liu Yi Zhong Daimei Chen Hao Ding Jiao Wang Gaoxiang Du Guang Yang Qiang Hao Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China Beijing Polytechnic College Beijing 100042China Centre for Technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneySydney 2007Australia

In this work, a two-step electrodeposition method was employed to prepare bipo4 nanorod/reduced graphene oxide/FTO composite electrodes(bipo4/r GO/FTO). The bipo4/r GO/FTO composite electrode showed the higher photoelectrocatalytic(PEC) activity for the removal of methyl orange than pure bipo4, which was 2.8 times higher than that of bipo4/FTO electrode. The effects of working voltage and bipo4 deposition time on the degradation efficiency of methyl orange were investigated. The optimum bipo4 deposition time was 45 min and the optimum working voltage was 1.2 V. The trapping experiments showed that hydroxyl radicals(·OH) and superoxide radicals(·O2-) were the major reactive species in PEC degradation process. The bipo4/r GO/FTO composite electrode showed the high stability and its methyl orange removal efficiency remained unchanged after four testing cycles. The reasons for the enhanced PEC efficiency of the bipo4/r GO/FTO composite electrode was ascribed to the broad visible-light absorption range, the rapid transmission of photogenerated charges, and the mixed bipo4 phase by the introduction of r GO in the composite electrode films.

关键词： Reduced graphene oxide bipo4 Fluorine-doped tin oxide Electrodeposition Photoelectrocatalysis Methyl orange

Effcient Removal Phenol Red over Ternary Heterostructured Ag-Bi2MoO6/bipo4 Composite Photocatalyst

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2016年第5期29卷 600-606,I0002页

作者：姜大雨徐达郑佳杨阳刘畅王宇爽车广波林雪常立民吉林师范大学环境友好材料制备与应用教育部重点实验室长春130103

The fabrication of multicomponent composite systems may provide bene ts in terms of charge separation and the retardation of charge pair recombination. In this work, a ternary heterostructured Ag-Bi2MoO6/bipo4 composite was fabricated through a low-temperature solution-phase route for the rst time. The XRD, SEM, EDX and XPS results indicated the prepared sample is a three-phase composite of bipo4, Bi2MoO6, and Ag. Ag nanopar-ticles were photodeposited on the surface of Bi2MoO6/bipo4 nanosheets, which not only increase visible-light absorption via the surface plasmon resonance, but also serve as good electron acceptor for facilitating quick photoexcited electron transfer. The interface between Bi2MoO6 and bipo4 facilitates the migration of photoinduced electrons from Bi2MoO6 to bipo4, which is also conductive to reduce the recombination of electron-holes. Thus, the ternary heterostructured Ag-Bi2MoO6/bipo4 composite showed signi cant photocatalytic activity, higher than pure Bi2MoO6, bipo4, and Bi2MoO6/bipo4. Moreover, the possible photocatalytic mechanism of the Ag-Bi2MoO6/bipo4 heterostructure related to the band positions of the semiconductors was also discussed. In addition, the quenching effects of di erent scavengers revealed that the reactive ·OH and O2·- play a major role in the phenol red decolorization.

关键词： l-leterostructure Bi2MoO6 bipo4 Ag Photocatalysis Visible light

Er^3+:V0.01Y2.99Al5N0.01F0.01O11.98/bipo4/Pt光催化剂的制备及其在降解废水中亚甲基蓝的应用

在线全文

学校读者我要写书评

暂无评论

分子催化 2020年第3期34卷 201-209,I0001页

作者：赵丽敏靳瑞发马凤英李曙光赤峰学院化学与生命科学学院内蒙古赤峰024000 内蒙古自治区光电功能材料重点实验室内蒙古赤峰024000 阿拉善职业技术学院内蒙古巴彦浩特750306 阿拉善盟农畜产品质量检测中心内蒙古巴彦浩待750306

通过溶胶-凝胶法合成了上转换发光材料Er^3+:V0.01Y2.99Al5N0.01F0.01O11.98(Er:YAG),然后利用水热法合成了bipo4,再利用高温煅烧法合成了Er:YAG/bipo4/Pt复合物光催化剂.通过使用X-射线粉末衍射仪(XRD),扫描电子显微镜(SEM),透射电子... 详细信息

通过溶胶-凝胶法合成了上转换发光材料Er^3+:V0.01Y2.99Al5N0.01F0.01O11.98(Er:YAG),然后利用水热法合成了bipo4,再利用高温煅烧法合成了Er:YAG/bipo4/Pt复合物光催化剂.通过使用X-射线粉末衍射仪(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),光致发光光谱(PL)和上转换发射光谱对样品的组成、形貌及光学特征进行了表征.此外,还研究了不同甘油添加量、Er:YAG和bipo4的摩尔比例和复合温度及光催化剂的循环使用次数对Er:YAG/bipo4/Pt复合物光催化剂活性的影响.实验结果显示Er:YAG/bipo4/Pt复合物光催化剂具有高的光催化活性和较好的稳定性,它可以作为一种高效的光催化剂用于污水中有机污染物的处理.

关键词：上转换发光材料 Er^3+:V0.01Y2.99Al5N0.01F0.01O11.98 bipo4 光催化活性亚甲基蓝

Bi modified bipo4 nanoparticles with rich oxygen vacancies and their photocatalytic activity

在线全文

学校读者我要写书评

暂无评论

Bi modified BiPO4 nanoparticles with rich oxygen vacancies a...

Fabrication of bipo4 photocatalysts for different photodegradation of RhB

中国化学会第九届全国无机化学学术会议

作者： Fan Tian Rong Chen School of Chemistry and Environmental Engineering Wuhan Institute of Technology

Metal-semiconductor nano-heterostructures and vacancies chemistry have been emerged interest in a wide range of application[1-5]. In this work, we design and prepared a novel Bi modified bipo4 nanostructure with rich oxygen vacancies in the surface and sub-surface via a one-pot solvothermal treatment by using sodium tripolyphosphate（STPP） as phosphate precursor. Benefiting the unique structure and composite, the as-prepared nanocrystal heterostructures exhibit significantly enhanced photocatalytic activity for methyl blue degradation. The enhanced photocatalytic activity is ascribing to the synergetic effects between oxygen vacancies and the modified Bi nanocrystal.

关键词： bipo4 Bi oxygen vacancies photocatalysis nanocomposites

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Fabrication of BiPO4 photocatalysts for different photodegra...