استراتژی های بهبود شکافت فوتو کاتالیستی آب در راستای تولید هیدروژن
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استراتژی های بهبود شکافت فوتو کاتالیستی آب در راستای تولید هیدروژن

عنوان فارسی مقاله: یک بررسی انتقادی در استراتژی های بهبود شکافت فوتو کاتالیستی آب در راستای تولید هیدروژن
عنوان انگلیسی مقاله: A critical review in strategies to improve photocatalytic water splitting towards hydrogen production
مجله/کنفرانس: مجله بین المللی انرژی هیدروژن - International Journal of Hydrogen Energy
رشته های تحصیلی مرتبط: مهندسی انرژی، شیمی
گرایش های تحصیلی مرتبط: انرژی های تجدیدپذیر، شیمی کاتالیست، فناوری های انرژی، شیمی تجزیه
کلمات کلیدی فارسی: کاتالیزگری نوری، تولید هیدروژن، ترمودینامیک، TiO2/g-C3N4، ساختار ناهمگن، راکتورهای نوری
کلمات کلیدی انگلیسی: Photocatalysis، Hydrogen production، Thermodynamics، TiO2/g-C3N4، Heterojunctions، Photoreactors
نوع نگارش مقاله: مقاله مروری (Review Article)
نمایه: Scopus - Master Journals List - JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.ijhydene.2018.10.200
دانشگاه: Chemical Reaction Engineering Group (GREG), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
ایمپکت فاکتور: 4/216 در سال 2018
شاخص H_index: 187 در سال 2019
شاخص SJR: 1/1 در سال 2018
شناسه ISSN: 0360-3199
شاخص Quartile (چارک): Q2 در سال 2018
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 38
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
کد محصول: E11399
فهرست انگلیسی مطالب

Abstract


Introduction


Fundamentals and thermodynamics of photocatalysis


Advancements in photocatalysts for water splitting


Heterojunction construction


Factors that influence photocatalyst activity


Advancements in photoreactors


Conclusion and future perspectives


References

نمونه متن انگلیسی مقاله

Abstract


Water splitting for hydrogen production under light irradiation is an ideal system to provide renewable energy sources and to reduce global warming effects. Even though significant efforts have been devoted to fabricate advanced nanocomposite materials, the main challenge persists, which is lower efficiency and selectivity towards H2 evolution under solar energy. In this review, recent developments in photo-catalysts, fabrication of novel heterojunction constructions and factors influencing the photocatalytic process for dynamic H2 production have been discussed. In the mainstream, recent developments in TiO2 and g-C3N4 based photo-catalysts and their potential for H2 production are extensively studied. The improvements have been classified as strategies to improve different factors of photocatalytic water splitting such as Z-scheme systems and influence of operating parameters such as band gap, morphology, temperature, light intensity, oxygen vacancies, pH, and sacrificial reagents. Moreover, thermodynamics for selective photocatalytic H2 production are critically discussed. The advances in photo-reactors and their role to provide more light distribution and surface area contact between catalyst and light were systematically described. By applying the optimum operating parameters and new engineering approach on photoreactor, the efficiency of semiconductor photocatalysts for H2 production can be enhanced. The future research and perspectives for photocatalytic water splitting were also suggested.


Introduction


Natural resources such as coal and petroleum products as a source of energy are nearly exhausted [1]. The reduction of fossil fuel reserves has prompted substantial research efforts toward the usage of hydrogen (H2) as an environmentally friendly energy carrier for the post fossil fuel regime [2]. It is currently generally agreed that H2 may be the best option for tackling the triple issues of exhaustion, pollution and climate change effects [3]. One of the technologies for H2 production is photocatalytic water splitting, since it entails photonic energy, which is the most abundant energy resource on the Earth [4]. Previous research states that solar based H2 generation by photocatalysis provides near zero global warming and air pollutants [5], and can be stored easily [6]. Therefore, H2 is considered as a possible important energy in future, since it is free from toxic and it can produce high energy content from natural resources such as light (photon) energy and water, which are clean, long lasting sources of energy, and renewable resources [7]. Pioneer work as early as 1972 by Fujishima and Honda [8] reported water splitting for H2 production over TiO2 semiconductor. Since then, various types of semiconductors for photocatalytic H2 productions are under investigation. Among all, titanium dioxide (TiO2) with band gap 3.2 eV is a recognized photocatalyst and it has been extensively studied because of numerous advantages such as low cost, high photochemical stability and non-toxic [6,9]. On the other hand, wide band gap limits its applications under visible light and faster charges recombination rate lowers its photocatalytic activity [6,10]. Coupling TiO2 with visible light semiconductors can narrowing the band gap with faster charges separation, thus could enables enhanced photo-catalytic activity. Among the low band gap semiconductors, polymeric graphitic carbon nitride (g-C3N4) has attracted more attentions as metal-free polymeric semiconductor in photocatalytic water splitting. It is a visible light responsive with lower band gap and low cost semiconductor. It can be synthesized from cheap precursors such as melamine and urea by simple thermal approach. In addition, g-C3N4 has numerous advantages such as high thermal and chemical stability and appropriate band structure (2.7 eV) to absorb visible light irradiation [11]. Among the limitations, g-C3N4 has low surface area and small active sites for interfacial (photon) reaction, moderate oxidation reaction of water to Hþ and low charge mobility which disrupt the delocalization of electrons.

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