Enhancing Hydrogen Generation using CdS-modified TiO2 Nanotube Arrays in 2,4,6-Trichlorophenol as a Hole Scavenger

IF 2.4 Q3 ENERGY & FUELS
R. Ratnawati, S. Slamet, Farah Diba Toya, Satrio Kuntolaksono
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引用次数: 1

Abstract

Nowadays, the lack of renewable energy such as hydrogen, and other environmental issues are problems that must be resolved. 2,4,6-Trichlorophenol (2,4,6-TCP) is classified as a recalcitrant pollutant due to its carcinogenic properties, high toxicity, and dangers to the environment therefore it needs to be eliminated. Hydrogen production using organic pollutant (2,4,6-TCP solution) as a hole scavenger on CdS-TiO2 nanotube arrays photocatalyst (TNTA-CdS) has been investigated at various CdS loading on TNTA and the initial concentration of 2,4,6-TCP. The TNTA sample was prepared by anodization and followed by an electrodeposition method to decorate CdS on TNTA. The H2 which was generated by reduction H+ and the 2,4,6-TCP removal was performed simultaneously by photocatalysis with TNTA-CdS as photocatalyst. The mole ratio of CdCl2:CH3CSNH2 as precursors of CdS deposited on TNTA (CdS loading) were 0.1:0.06, 0.2:0.12, and 0.4:0.24 and the initial concentration of 2,4,6-TCP were 10, 20 and 40 ppm. Meanwhile, the photocatalytic performance of the variations in CdS loading on TNTA and initial concentration of 2,4,6-TCP toward hydrogen generation was investigated in a photoreactor for 240 minutes under visible light irradiation with a mercury lamp as a photon source. The CdS decorating on TNTA was confirmed by SEM, EDX, and X-ray diffraction (XRD) characterization. According to the UV-Vis and XRD analysis, the TNTA-CdS samples have bandgap energies in the range of 2.71 - 2.89 eV and comprise a 100% anatase phase. Based on the photocatalysis results, the optimum composition of CdS loading is 0.2:0.16 (TNTA-CdS-2) which produced the highest total hydrogen (2.155 mmol/g) compared to the other compositions and produced 1.5 times higher compared to TNTA at 40 ppm of 2,4,6-TCP.
利用cds修饰的TiO2纳米管阵列增强2,4,6-三氯苯酚的产氢能力
如今,氢等可再生能源的缺乏以及其他环境问题是必须解决的问题。2,4,6-三氯苯酚(2,4,6- tcp)具有致癌性、高毒性和环境危害性,属于顽固性污染物,需要淘汰。研究了以有机污染物(2,4,6- tcp溶液)作为孔洞清除剂,在不同cd负载和2,4,6- tcp初始浓度条件下,CdS- tio2纳米管阵列光催化剂(TNTA-CdS)上的制氢反应。采用阳极氧化法制备TNTA样品,然后采用电沉积法在TNTA表面装饰cd。以TNTA-CdS为光催化剂,同时进行H+还原生成H2和去除2,4,6- tcp的反应。CdCl2:CH3CSNH2的摩尔比分别为0.1:0.06、0.2:0.12和0.4:0.24,2、4、6-TCP的初始浓度分别为10、20和40 ppm。同时,以水银灯为光子源,在可见光照射240 min的光反应器中,研究了cd负载TNTA和2,4,6- tcp初始浓度的变化对制氢的光催化性能。通过SEM, EDX和x射线衍射(XRD)表征证实了CdS在TNTA上的修饰。根据UV-Vis和XRD分析,TNTA-CdS样品的带隙能在2.71 ~ 2.89 eV之间,由100%锐钛矿相组成。结果表明,在2,4,6- tcp浓度为40 ppm时,CdS负载的最佳组合为0.2:0.16 (TNTA-CdS-2),与其他组合相比,总氢产量最高(2.155 mmol/g),比TNTA高1.5倍。
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来源期刊
CiteScore
4.50
自引率
16.00%
发文量
83
审稿时长
8 weeks
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