Phase relations and optoelectronic characteristics in the NdVO4–BiVO4 system

Phase Evolution and Microwave Dielectric Properties of (Bi1−xFex)VO4 (x ≤ 0.40) Ceramics

“…However, considering the limited sensitivity of the XRD technique, it cannot be concluded that Fe does enter A site in the monoclinic scheelite structure with a solid solubility ≤8%, without any further evidence. Similar to this work, although there was no secondary phase revealed in the XRD patterns of Nd x Bi 1Àx VO 4 system when x < 0.08 as reported by Dragomir et al, 12 it was proved by EXAFS results that the Nd could not enter the A site in monoclinic scheelite structure, due to the specific hybridization of the Bi 6s 2 and O 2p orbitals. According to our previous reports, 5,11 the phase transition from monoclinic to tetragonal scheelite phase can be induced by the increase in equivalent B site ionic radius along with the characteristic merging of (2 0 0) and (0 2 0) diffraction peaks.…”

The synthesize of lanthanide doped BiVO4 and its enhanced photocatalytic activity

“…Evidently, the formation of Nd-BiVO 4 composite with the efficiency separation and transfer of photogenerated carriers is more possible, and well-fabricated Nd-BiVO 4 composite could availably restrict the recombination of photogenerated carriers and effectively enhance the quantum yield. Although, there are some reports about lanthanide elements doping BiVO 4 [29][30][31][32][33], however, to the best of our knowledge, 2D long rod shaped structures NdBiVO4 composite has never been constructed, and the influence of lanthanide sources on the photocatalytic activity of the Nd doped BiVO 4 for the degradation of phenol and desulfurization under visible irradiation has never been studied. Hence, in the present work, we synthesized Nd-doped BiVO 4 composite.…”

“…In order to determine the function of the active free radicals, the benzoquinone (BQ), ethylene diamine tetraacetic acid(EDTA) and isopropanol (IPA) is used to capture the superoxide radical anion O 2 −• , photo-generated hole h + and hydroxyl free radical •OH by a simple electron transfer mechanism, respectively [33][34][35]. The degradation effect of phenol over 0.8 wt.% Nd-BiVO 4 under different scavengers is shown in Fig.…”

Morphology and Photocatalytic Performance Regulation of Nd3+-doped BiVO4 with Staggered Band Structure

“…Key words: BiVO 4 ; staggered energy band; morphology; photocatalytic degradation 钒酸铋是一种重要的半导体光催化材料, 通常 用来降解罗丹明 B、亚甲基蓝、布洛芬等有机污染 物 [1][2][3] , 其结构主要有四方锆石相、四方白钨矿相以 及单斜白钨矿相 [4] 。单斜和四方白钨矿相带隙为 2.40 和 2.39 eV, 小于四方锆石相的 2.90 eV, 因而一 般认为上述两种结构钒酸铋的光催化性能优于后 者 [5] 。合成纯相钒酸铋的方法主要有固相法、水热 法、沉淀法和溶剂热法等 [6][7][8][9] 。另外, 通过离子掺杂、 半导体复合、表面修饰等方法形成电子空穴陷阱、 异质结、肖特基势垒阻止光生载流子复合, 增加 催化过程所需电子空穴数目, 可以提高钒酸铋催化 性能 [10] 。 离子掺杂是一种简单易行的方法, 例如钐掺杂 可以增强钒酸铋紫外和可见光降解亚甲基蓝效率, 最佳钐掺杂浓度为 10at% [11] 。钐掺杂导致相变发生, 并从能带角度解释混合相异质结对光催化的改性机 理。 陈睿智等 [12] [13] ,…”