Preparation of a Ti(0.7)W(0.3)O(2)/TiO(2) nanocomposite interfacial photocatalyst and its photocatalytic degradation of phenol pollutants in wastewater.
Preparation of a Ti(0.7)W(0.3)O(2)/TiO(2) nanocomposite interfacial photocatalyst and its photocatalytic degradation of phenol pollutants in wastewater.
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Ti0.7W0.3O2/TiO2纳米复合界面光催化剂的制备及其光催化降解废水中苯酚污染物
DOI：
10.1039/c9na00478e
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发表时间：
2020-01-22
影响因子：
4.7
通讯作者：
中科院分区：
文献类型：
--
作者：
设计并制备了Ti0.7W0.3O2/TiO2纳米复合界面光催化剂，用于光催化降解废水中的酚类污染物。采用XRD、SEM、EDX、DRS、UPS和XPS等技术分析了Ti0.7W0.3O2/TiO2纳米复合界面（NCI）的详细性能，结果表明锐钛矿型TiO2纳米球（NSs）均匀分布在金红石型Ti0.7W0.3O2纳米颗粒（NPs）表面，形成了纳米复合界面。5 wt% Ti0.7W0.3O2/TiO2 NCI的DRS和UPS结果表明，其光响应范围大大拓宽，波长短于527 nm，带隙能量较短，为2.37 eV。根据XPS和DRS得到的价带和带隙能，测定了TiO2 NSs、Ti0.7W0.3O2 NPs和5 wt% Ti0.7W0.3O2/TiO2 NCI的导带，并给出了Ti0.7W0.3O2/TiO2 NCI的能级图。在紫外可见光照射下，在最佳条件（pH = 4.5，催化剂投加量为0.45 g L−1，苯酚初始浓度为95 ppm）下，研究了Ti0.7W0.3O2/TiO2 NCI在不同Ti0.7W0.3O2 NPs负载比下对苯酚的光催化降解。5 wt%的Ti0.7W0.3O2/TiO2 NCI具有最高的光催化活性，其初始速率常数(k)为0.09111 min−1。经过6次回收，Ti0.7W0.3O2/TiO2 NCI表现出良好的稳定性和可回收性。使用对苯二甲酸（TA）荧光探针证实了超氧自由基参与了Ti0.7W0.3O2/TiO2 NCI的初始反应。利用紫外可见光谱、高效液相色谱-质谱和气相色谱-质谱技术对光催化降解苯酚的主要中间体进行了分析。提出了苯酚在Ti0.7W0.3O2/TiO2 NCI上光催化降解的可能机理。设计并制备了Ti0.7W0.3O2/TiO2纳米复合界面光催化剂，用于光催化降解废水中的酚类污染物。
A Ti0.7W0.3O2/TiO2 nanocomposite interfacial photocatalyst was designed and prepared for the photocatalytic degradation of phenol pollutants in wastewater. The detailed properties of the Ti0.7W0.3O2/TiO2 nanocomposite interface (NCI) were analyzed by XRD, SEM, EDX, DRS, UPS and XPS technologies, showing that anatase TiO2 nanospheres (NSs) were uniformly dispersed on the surface of rutile Ti0.7W0.3O2 nanoparticles (NPs) and formed the nanocomposite interface. The DRS and UPS results of 5 wt% Ti0.7W0.3O2/TiO2 NCI indicated a greatly broadened light response range with a wavelength shorter than 527 nm and a shorter band gap energy of 2.37 eV. The conduction band of TiO2 NSs, Ti0.7W0.3O2 NPs and 5 wt% Ti0.7W0.3O2/TiO2 NCI were measured based on the results of the valence band and band gap energy obtained via XPS and DRS, and then the energy level diagram of Ti0.7W0.3O2/TiO2 NCI was proposed. The photocatalytic degradation of phenol at Ti0.7W0.3O2/TiO2 NCI with different loading ratios of Ti0.7W0.3O2 NPs was investigated under optimum conditions (i.e., pH of 4.5, catalyst dosage of 0.45 g L−1 and phenol initial concentration of 95 ppm) under the illumination of ultraviolet visible light. Also, 5 wt% Ti0.7W0.3O2/TiO2 NCI exhibited the highest photocatalytic activity, with the initial rate constant (k) calculated as 0.09111 min−1. After recycling six times, Ti0.7W0.3O2/TiO2 NCI showed good stability and recyclability. The involvement of superoxide radicals in the initial reaction at Ti0.7W0.3O2/TiO2 NCI was evidenced by the use of a terephthalic acid (TA) fluorescent probe. Besides, UV-Vis spectroscopy, UHPLC-MS and GC-MS technologies were used to analyze the main intermediates in the photocatalytic degradation of phenol. The probable photocatalytic degradation mechanism of phenol at Ti0.7W0.3O2/TiO2 NCI was also proposed. The Ti0.7W0.3O2/TiO2 nanocomposite interfacial photocatalyst was designed and prepared for the photocatalytic degradation of phenol pollutants in wastewater.
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DOI：
10.1016/s1010-6030(01)00435-x
发表时间：
2001-06-15
影响因子：
4.3
作者：
Galindo, C;Jacques, P;Kalt, A
通讯作者：
Kalt, A
影响因子：
2.8
作者：
Barakat, M. A.;Al-Hutailah, R. I.;Kuhn, J. N.
通讯作者：
Kuhn, J. N.
影响因子：
8.6
作者：
Ahmadi, Mehdi;Kakavandi, Babak;Babaei, Ali Akbar
通讯作者：
Babaei, Ali Akbar
影响因子：
3.9
作者：
Hayati, Farzan;Isari, Ali Akbar;Fattahi, Moslem;Anvaripour, Bagher;Jorfi, Sahand
通讯作者：
Jorfi, Sahand
影响因子：
3.9
作者：
Das, Sujoy K.;Das, Akhil R.;Guha, Arun K.
通讯作者：
Guha, Arun K.