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BiVO4

BiVO4的相关文献在2006年到2022年内共计138篇,主要集中在化学、化学工业、一般工业技术 等领域,其中期刊论文133篇、会议论文5篇、专利文献123793篇;相关期刊77种,包括材料导报、功能材料、广东化工等; 相关会议5种,包括2010年第九届中国国际纳米科技(西安)研讨会、第二届中国西部药物分析学术研讨会、第七届全国工业催化技术及应用年会等;BiVO4的相关文献由519位作者贡献,包括王敏、刘伟、刘国聪等。

BiVO4—发文量

期刊论文>

论文:133 占比:0.11%

会议论文>

论文:5 占比:0.00%

专利文献>

论文:123793 占比:99.89%

总计:123931篇

BiVO4—发文趋势图

BiVO4

-研究学者

  • 王敏
  • 刘伟
  • 刘国聪
  • 姚秉华
  • 张进
  • 杨长秀
  • 陈渊
  • 陈颖
  • 朱彤
  • 李慧
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 张钒; 蒋海燕; 王萍; 于曙光
    • 摘要: 采用简单的醇-水热法合成了花状和棒状BiVO_(4)光催化剂,并利用X射线衍射、扫描电子显微镜和紫外-可见吸收光谱技术表征BiVO_(4)光催化剂的物理性质,以可见光照射下光催化降解甲基橙的反应考察它们的光催化活性。结果表明:所得BiVO_(4)光催化剂均为高纯度、高结晶度的单斜相BiVO_(4),表面活性剂的加入有助于控制粒子的形貌。其中,花状BiVO_(4)光催化剂的光催化活性最好,这是因为相较于其他光催化剂,花状BiVO_(4)光催化剂具有最低的带隙能和最高的结晶度。
    • Hongyun Cao; Taotao Wang; Jiaxing Li; Jinbao Wu; Pingwu Du
    • 摘要: BiVO_(4) has been attracting a lot of interest in photoelectrochemical (PEC) water oxidation due to its efficient solar absorption and appropriate band positions.So far,sluggish water oxidation kinetics and fast photogenerated charge recombination still hinder the PEC performance ofBiVO_(4) .In this study,a novel PEC photoanode was designed by depositing ultrathin FeOOH nanolayers on the surface of nanoporousBiVO_(4) electrode,followed by modification with a cobaloxime (Co(dmgH)_(2)(4-COOH-py)Cl) molecular cocatalyst.Under irradiation of a 100 mW cm^(-2)(AM 1.5G) Xe lamp,the photocurrent density of the cobaloxime/FeOOH/BiVO_(4) composite photoanode reached 5.1 mA cm^(-2)at 1.23 V vs.RHE in 1.0 M potassium borate buffer solution (pH=9.0).The onset potential of the optimal cobaloxime/FeOOH/BiVO_(4) photoanode exhibited a 460 m V cathodic shift relative to bareBiVO_(4) .In addition,the surface charge injection efficiency of the composite photoanode reached~80%at 1.23 V vs.RHE and the incident photon-to-current efficiency (IPCE) reached~88%at 420 nm.
    • Kai Song; Fang He; Ergang Zhou; Lin Wang; Huilin Hou; Weiyou Yang
    • 摘要: The sluggish kinetics for water oxidation is recognized as one of the major problems for the unsatisfied photoelectrochemical(PEC) performance. Herein, we developed a feasible strategy based on in-situ selective surface cation exchange, for activating surface water oxidation reactivity toward boosted PEC water oxidation of BiVO_(4) photoanodes with fundamentally improved surface charge transfer. The asconstructed Co/BiVO_(4) photoanodes exhibit 2.6 times increase in photocurrent density with superior stability, in comparison to those of pristine counterpart. Moreover, the faradaic efficiency of as-fabricated photoanode can be up to ~ 95% at 1.23 V(vs. RHE). The unique selective replacement of Bi by Co on the surface could modify the electronic structure of BiVO_(4) with reduced energy barrier of the deprotonation of OH^(+) to O, thus favoring the overall excellent PEC performance of Co/BiVO_(4) photoanode.
    • Shankara S.Kalanur; Hyungtak Seo
    • 摘要: Monoclinic BiVO_(4) is a widely researched semiconductor in solar water splitting owing to its suitable characteristics. However, BiVO_(4) faces limitations, such as the inefficient separation and transportation of photogenerated charges in the bulk and poor catalytic water oxidation reactions at the surface that affect the water-splitting efficiency. In this work, the Cs intercalation strategy at the surface of BiVO_(4) is proposed for the enhanced water splitting to H_(2) and O_(2) productions via the effective separation and transportation photogenerated charges and improved surface catalytic water oxidation reactions. The Cs ions are found to intercalate at the surface of BiVO_(4) and regulate the oxygen vacancies to provide active O_(2) production sites and stability. The surface intercalation of Cs boosts the photocurrent to 1.89 mA cm^(-2)at 1.23 V vs.reference hydrogen electrode(RHE). A stoichiometric evolution of H_(2) and O_(2) is recorded with a faradaic efficiency of 92%. The open-circuit voltage measurements confirmed the increase in the carrier lifetime with the work function tuning upon Cs intercalation. The proposed Cs intercalation strategy suggests an effective route to suppress the charge recombination with an increase in carrier lifetime and charge separation in BiVO_(4) for the enhanced PEC application.
    • 姚腾飞; 傅毛生; 张帆; 罗颖琦; 聂宗翼; 梁嘉龙; 刘乐雄
    • 摘要: 以乙二胺四乙酸(EDTA)作为铋源络合剂,通过添加缓冲液控制前驱液pH值,采用水热合成技术制备Gd^(3+) 掺杂BiVO_(4)粉体。利用X射线衍射(XRD)和扫描电镜(SEM)表征粉体的相组成、结构和微观形貌,考察Gd^(3+) 掺杂对BiVO_(4)粉体在发光二极管日光灯(LED灯)照射下降解罗丹明 B的可见光光催化性能影响。结果表明:水热法制备的Gd^(3+) 掺杂BiVO_(4)粉体与纯BiVO_(4)粉体的晶型均为单斜白钨矿晶型,结晶度良好,粉体微观形貌为大小约为500 nm 方块饼形。Gd^(3+) 掺杂提高BiVO_(4)粉体的可见光催化性能,其中Gd^(3+) 掺杂摩尔比为6%时是最佳,它同时提高罗丹明 B的降解速率和最终降解率,LED灯光照射掺杂6%Gd^(3+) BiVO_(4)粉体90 min时罗丹明 B降解率为46.7%,而纯BiVO_(4)光照120 min时罗丹明 B降解率只有24.2%。
    • Nengcong Yang; Ruotian Chen; Chenwei Ni; Dongfeng Li; Qi Sun; Lifang Liu; Yu Qi; Shengye Jin; Xiuli Wang; Fengtao Fan; Can Li; Fuxiang Zhang
    • 摘要: One dimensional(1D)semiconductor is a class of extensively attractive materials for many emerging solar energy conversion technologies.However,it is still of shortage to assess the impact of 1D structural symmetry on spatial charge separation and understand its underlying mechanism.Here we take controllably-synthesized 1D BiVO_(4)nanocones and nanorods as prototypes to study the influence of 1D symmetry on charge separation.It is found that the asymmetric BiVO_(4)nanocones enable more effective charge separation compared with the symmetric nanorods.The unexpected spatial charge separation on the nanocones is mainly ascribed to uneven light absorption induced diffusion-controllable charge separation due to symmetry breaking of 1D nanostructure,as evidenced by spatial and temporal resolved spectroscopy.Moreover,the promotion effect of charge separation on the nanocones was quantitatively evaluated to be over 20 times higher than that in BiVO_(4)nanorods.This work gives the first demonstration of the influence of 1D structural symmetry on the charge separation behavior,providing new insights to design and fabricate semiconductor materials for efficient solar energy conversion.
    • 张纹; 田梦; 焦海淼; 蒋海英; 唐军旺
    • 摘要: 光电化学(PEC)分解水制氢,已成为将太阳能转化为绿色可持续氢能极具潜力的途径之一.目前,单斜相钒酸铋(BiVO_(4))因其合适的带隙及能带位置、无毒且含量丰富等优点,被认为是理想的光阳极材料.然而,BiVO_(4)较低的载流子迁移率(4×10^(−2) cm^(2) V−1 s−1)和较短的空穴扩散长度(<100 nm),导致BiVO_(4)光阳极电子-空穴复合较严重,极大地限制了其性能.为克服上述缺陷,除减小BiVO_(4)纳米颗粒的粒径以匹配其较短的空穴扩散长度,使空穴能有效转移到其表面参与水氧化反应;或在其表面沉积一层薄的氧气释放反应助催化剂(OEC)层以增强水氧化反应动力学以外,还应关注如何进一步有效提升BiVO_(4)电荷分离效率.因此,在BiVO_(4)和氟掺杂的氧化锡(FTO)电极界面之间插入另一种半导体材料构筑异质结以促进BiVO_(4)电荷分离,进一步提升BiVO_(4)电荷分离效率.本文采用成本低廉、可控性高的单层胶体晶体(MCC)方法首先合成了单层WO_(3)纳米碗(WO_(3)NB)阵列,再通过分步沉积法在单层WO_(3)NB表面原位生长BiOI,确保BiOI在WO_(3)NB表面的完全覆盖,最后通过热处理将BiOI转化为BiVO_(4)纳米颗粒成功构建高匹配的BiVO_(4)/WO_(3)NB异质结.在这种新颖的结构设计中,小尺寸的BiVO_(4)纳米颗粒(~90 nm)均匀地沉积在WO_(3)纳米碗(内径约为920 nm)表面.高度有序的WO_(3)NB阵列担载了BiVO_(4)的小尺寸和纳米结构,最小化了WO_(3)颗粒间的晶界缺陷,并增加了与BiVO_(4)纳米粒子的接触面积.结合X射线粉末衍射、X射线光电子能谱、高分辨透射电子显微镜和能带分析发现,BiVO_(4)与WO_(3)NB匹配的能带位置和高度匹配的BiVO_(4)/WO_(3)NB界面可显著增强BiVO_(4)与WO_(3)NB之间的电荷传输;此外,光致发光光谱和电化学阻抗测试结果表明,由于制备的BiVO_(4)纳米颗粒尺寸小于其空穴扩散长度(~100 nm),可确保空穴更有效的传递到NiOOH/FeOOH层中并参与表面水氧化反应;在OEC/BiVO_(4)和BiVO_(4)/WO_(3)NB两种结的协同作用下制备的NiOOH/FeOOH/BiVO_(4)/WO_(3)NB光阳极在中性电解质溶液Na_(2)SO_(4)溶液中,1.23 V vs.RHE偏压下的光电流密度为3.02 mA cm−2,法拉第效率达95%.本文研究结果为设计与构筑高匹配多重“结”BiVO_(4)光阳极提供了有效策略.
    • 胡元潮; 董祥庆; 胡上茂; 安韵竹; 刘刚; 景强
    • 摘要: 采用水热法制备了十面体BiVO_(4)纳米材料,用扫描电子显微镜、X射线衍射进行表征。气敏测试结果表明,制备的BiVO_(4)传感器对H_(2)S气体有着较高的灵敏度响应和良好的选择性。在最佳工作温度(180°C)下,该传感器对于100μL/L H_(2)S的响应值为55.683,响应时间为25 s,最低检测浓度为1μL/L。可为SF_(6)分解气体检测提供参考。
    • 刘丽忠; 胡太平; 代凯; 张金锋; 梁长浩
    • 摘要: 近年来,有机污染物的问题变得越来越严重.为了解决该问题,人们研究和开发了许多有效的光催化剂.本工作采用水热法和化学沉积法合成了BiVO4/Ag3VO4梯型半导体材料,该复合材料在可见光下具有很强的氧化还原能力.其中40%BiVO4/Ag3VO4具有最佳的光催化降解性能,其降解速率为0.05588 min–1,分别是BiVO4和Ag3VO4的22.76和1.76倍.并且其性能稳定,经过四次循环后其降解率仍可保持90%以上.BiVO4和Ag3VO4复合后,其催化性能得到增强,归因于形成了新型的梯型光催化机制,该方法促进了光生电荷的分离并延长了电荷的寿命,且通过PL测试和瞬态光电流响应证明了电荷的有效转移.X射线衍射(XRD)可以观察到Ag3VO4和BiVO4物相,没有其他成分.用扫描电子显微镜(SEM)和透射电子显微镜(TEM)进一步观察了该催化剂的结构和形貌,从SEM可以看出,Ag3VO4生长在BiVO4的上面,能谱分析也证明该催化剂仅包含Ag3VO4和BiVO4的各种元素,而不含其他杂质,TEM进一步证明了两种物质复合在一起,而不是机械混合.通过紫外-可见光漫反射光谱(UV-vis)测试可以得到BiVO4和Ag3VO4的吸收带边,进一步计算BiVO4的带隙和导带分别为2.41和0.455 eV,Ag3VO4的带隙和导带分别为2.20和0.04 eV,二者组成的异质结的带隙满足降解的条件.用荧光光谱(PL)和光电流研究了样品的光电特征,结果表明BiVO4/Ag3VO4光催化剂具有很高的载流子分离效率和很低的光电流电阻,这有助于光生载流子的运输.光催化降解甲基蓝实验表明,BiVO4/Ag3VO4具有很强的光催化降解速率(0.05588 min–1),是BiVO4的22.6倍,Ag3VO4的1.76倍,而且经过四次循环后仍能保持很高的活性.通过XRD发现使用后的催化剂并没有发生变化,说明该催化剂具有良好的稳定性.高分辨X射线光电子能谱(XPS)不仅进一步说明了该催化剂成功复合后没有其他杂质元素,而且从各元素的结合能变化可以看出构成异质结后电子的流向,证实了光催化机制为梯型机制.光照射后,BiVO4和Ag3VO4产生电子空穴对,当催化剂受光激发后,电子从价带被激发到导带,并在价带留下空穴.当BiVO4和Ag3VO4复合后,在接触界面形成内电场,由于库仑相互作用,能带边缘弯曲等作用加速了Ag3VO4价带上某些空穴和BiVO4导带上电子的复合,从而阻止了Ag3VO4和BiVO4内部电子空穴对的复合,这有助于Ag3VO4导带上的电子和BiVO4价带上的空穴参与氧化还原反应.从捕获实验可以看出,本实验中空穴在光催化降解中起着最重要的作用,这与上述结论一致.
    • 房维丽; 张震; 王恩红; 王欢; 王亮
    • 摘要: 采用简单的水热法制备BiVO4纳米片,然后通过NaBH4溶液还原法得到富含氧空位的OVs-BiVO4催化剂,并利用X射线衍射、固体紫外-可见漫反射光谱分析等手段对光催化材料进行分析.选用罗丹明B(RhB)和亚甲基蓝(MB)作为目标污染物探究了氧空位浓度对光催化剂降解性能的影响.结果表明,与原始BiVO4的降解速率相比,含氧空位的OVs-BiVO4-3和OVs-BiVO4-6对污染物的降解速率明显提高.
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