Fabrication of Niobium-Based Compounds and Their Applications in Dye-Sensitized Solar Cells and Anaerobic Digestion

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• 英文论文题名：Fabrication of Niobium-Based Compounds and Their Applications in Dye-Sensitized Solar Cells and Anaerobic Digestion
• 论文作者：张太宏 ; Xue Li ; Xinlei Huang ; Yuzhi Hou ; Yanfang Liu ; Xiao Zhou ; Wen Fang ; Jing Li ; Chen Wang ; Ziqi Wang ; 云斯宁
• 英文论文作者：Taihong Zhang ; Xue Li ; Xinlei Huang ; Yuzhi Hou ; Yanfang Liu ; Xiao Zhou ; Wen Fang ; Jing Li ; Chen Wang ; Ziqi Wang ; Sining Yun ; Functional Materials Laboratory(FML) ; Xi’an University of Architecture and Technology ; Key Laboratory of Nanomaterials and Nanotechnology of Shaanxi Province
• 年：2017
• 作者机构：西安建筑科技大学,材料与矿资学院,功能材料研究所;陕西省纳米材料与纳米技术重点实验室;
• 英文论文关键词：Nb-based compounds ; counter electrodes ; accelerants ; dye-sensitized solar cells ; anaerobic digestion
• 会议召开时间：2017-05-27
• 会议录名称：第四届新型太阳能电池学术研讨会论文集
• 英文会议录名称：Abstract Book of the 4th Conference on New Generation Solar Cells
• 语种：英文
• 分类号：TM914.4
• 学会代码：ZKYQ
• 会议名称：第四届新型太阳能电池学术研讨会
• 会议地点：中国北京
• 主办单位：中国可再生能源学会光化学专业委员会
• 学会名称：中国科学院物理研究所清洁能源实验室
• 页数：1
• 文件大小：683k
• 原文格式：D
• 会议级别：全国

摘要

Transition metal compounds(TMCs), as a representative family of functional materials, have attracted great attention in the field of renewable energy.Herein, Nb_(3.49)N_(4.56)O_(0.44) and NbN are prepared from the nitridation of NbO_2 in an NH_3 atmosphere.These dual-functional Nb-based compounds were applied to dye-sensitized solar cells(DSSCs) and anaerobic digestion(AD), and the efficiency and stability of these DSSCs and AD systems were systematically evaluated.The Nb_(3.49)N_(4.56)O_(0.44) counter electrode(CE) exhibited considerable electrocatalytic activity and stability in I_3~- reduction in DSSCs, achieving photovoltaic performance comparable with Pt(6.36% vs.7.19%).Furthermore, as accelerants, Nb-based compounds can greatly improve the AD environment, increasing substrate utilization and decreasing the hazards in the digestate.Compared with the control sample(409.2 mL/g·VS and 29.55%), substantially higher cumulative biogas production(437.1-522.7 mL/g·VS) and chemical oxygen demand removal rates(56.08%-65.19%) were achieved using Nb-based accelerants in the AD system.The nitridation technique is an effective and general means of converting Nb-based oxides into oxynitrides and nitrides.The Nb-based compounds with high electrocatalytic activities showed promise for DSSCs applications, while greatly enhancing the biodegradability of the AD system as accelerants.These findings could pave the way for multifunctional applications of TMCs in renewable energy fields.
Transition metal compounds(TMCs), as a representative family of functional materials, have attracted great attention in the field of renewable energy.Herein, Nb_(3.49)N_(4.56)O_(0.44) and NbN are prepared from the nitridation of NbO_2 in an NH_3 atmosphere.These dual-functional Nb-based compounds were applied to dye-sensitized solar cells(DSSCs) and anaerobic digestion(AD), and the efficiency and stability of these DSSCs and AD systems were systematically evaluated.The Nb_(3.49)N_(4.56)O_(0.44) counter electrode(CE) exhibited considerable electrocatalytic activity and stability in I_3~- reduction in DSSCs, achieving photovoltaic performance comparable with Pt(6.36% vs.7.19%).Furthermore, as accelerants, Nb-based compounds can greatly improve the AD environment, increasing substrate utilization and decreasing the hazards in the digestate.Compared with the control sample(409.2 mL/g·VS and 29.55%), substantially higher cumulative biogas production(437.1-522.7 mL/g·VS) and chemical oxygen demand removal rates(56.08%-65.19%) were achieved using Nb-based accelerants in the AD system.The nitridation technique is an effective and general means of converting Nb-based oxides into oxynitrides and nitrides.The Nb-based compounds with high electrocatalytic activities showed promise for DSSCs applications, while greatly enhancing the biodegradability of the AD system as accelerants.These findings could pave the way for multifunctional applications of TMCs in renewable energy fields.

引文

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