Photoelectrocatalytic generation of H2 and S from toxic H2S by using a novel BiOI/WO3 nanoflake array photoanode

IF 3.1 4区工程技术 Q3 ENERGY & FUELS

Frontiers in Energy Pub Date : 2021-09-10 DOI:10.1007/s11708-021-0775-7

Jing Bai, Bo Zhang, Jinhua Li, Baoxue Zhou

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引用次数: 4

Abstract

In this paper, a photoelectrocatalytic (PEC) recovery of toxic H₂S into H₂ and S system was proposed using a novel bismuth oxyiodide (BiOI)/ tungsten trioxide (WO₃) nano-flake arrays (NFA) photoanode. The BiOI/WO₃ NFA with a vertically aligned nanostructure were uniformly prepared on the conductive substrate via transformation of tungstate following an impregnating hydroxylation of BiI₃. Compared to pure WO₃ NFA, the BiOI/WO₃ NFA promotes a significant increase of photocurrent by 200%. Owing to the excellent stability and photoactivity of the BiOI/WO₃ NFA photoanode and \({{\rm{I}}^ - }{\rm{/I}}_3^ - \) catalytic system, the PEC system toward splitting of H₂S totally converted S²⁻ into S without any polysulfide (\({\rm{S}}_x^{n - }\)) under solar-light irradiation. Moreover, H₂ was simultaneously generated at a rate of about 0.867 mL/(h ·cm). The proposed PEC H₂S splitting system provides an efficient and sustainable route to recover H₂ and S.

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新型BiOI/WO3纳米片阵列光阳极催化有毒H2S生成H2和S

利用新型氧化铋(BiOI)/三氧化钨(WO3)纳米片阵列(NFA)光阳极，提出了一种光电催化(PEC)将有毒H2S回收到H2和S体系中的方法。BiI3浸渍羟基化后，通过钨酸盐的转化，在导电衬底上均匀制备了具有垂直排列纳米结构的BiOI/WO3 NFA。与纯WO3 NFA相比，BiOI/WO3 NFA使光电流显著增加200倍%. Owing to the excellent stability and photoactivity of the BiOI/WO3 NFA photoanode and \({{\rm{I}}^ - }{\rm{/I}}_3^ - \) catalytic system, the PEC system toward splitting of H2S totally converted S2− into S without any polysulfide (\({\rm{S}}_x^{n - }\)) under solar-light irradiation. Moreover, H2 was simultaneously generated at a rate of about 0.867 mL/(h ·cm). The proposed PEC H2S splitting system provides an efficient and sustainable route to recover H2 and S.

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来源期刊

Frontiers in Energy Energy-Energy Engineering and Power Technology

CiteScore

5.90

自引率

6.90%

发文量

708

期刊介绍： Frontiers in Energy, an interdisciplinary and peer-reviewed international journal launched in January 2007, seeks to provide a rapid and unique platform for reporting the most advanced research on energy technology and strategic thinking in order to promote timely communication between researchers, scientists, engineers, and policy makers in the field of energy. Frontiers in Energy aims to be a leading peer-reviewed platform and an authoritative source of information for analyses, reviews and evaluations in energy engineering and research, with a strong focus on energy analysis, energy modelling and prediction, integrated energy systems, energy conversion and conservation, energy planning and energy on economic and policy issues. Frontiers in Energy publishes state-of-the-art review articles, original research papers and short communications by individual researchers or research groups. It is strictly peer-reviewed and accepts only original submissions in English. The scope of the journal is broad and covers all latest focus in current energy research. High-quality papers are solicited in, but are not limited to the following areas: -Fundamental energy science -Energy technology, including energy generation, conversion, storage, renewables, transport, urban design and building efficiency -Energy and the environment, including pollution control, energy efficiency and climate change -Energy economics, strategy and policy -Emerging energy issue