Abstract
The production of H2 and O2 from solar-light photocatalytic water splitting has attracted significant research attention as a clean and renewable source of energy. In this study, hydrogenated TiO2/SrTiO3 porous microspheres were prepared as a high-performance photocatalyst. Titanium glycerolate and then strontium complex precursors were first prepared via a two-step solvothermal process, then, after calcination in air and subsequent H2/Ar reduction treatments, hydrogenated TiO2/SrTiO3 porous microspheres with controllable defects and band positions were prepared. Several characterization techniques were used to demonstrate that the catalyst heterostructures, the oxygen-vacancy content, and the unique porous structures synergistically enhanced the visible-light harvesting abilities and photogenerated charge separation, and resulted in improved photocatalytic efficiency for H2 and O2 evolution. As expected, the optimum treatment conditions provided hydrogenated TiO2/SrTiO3 porous microspheres that showed excellent photocatalytic activity with H2 and O2 evolution rates of 239.97 and 103.79 μmol h−1 (50 mg catalyst, under AM 1.5 irradiation), respectively, which were ca. 5.9 and 6.6 times higher, respectively, than those of solid TiO2/SrTiO3 materials. Thus, this type of hydrogenated TiO2/SrTiO3 porous microsphere catalyst shows great potential as a photocatalyst for solar-energy conversion applications.
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Xiang Q, Yu J, Jaroniec M. Synergetic effect of MoS2 and graphene as cocatalysts for enhanced photocatalytic H2 production activity of Ti2 nanoparticles. J Am Chem Soc, 2012, 134: 6575–6578
Liu W, Qu Y, Zhou W, et al. A versatile salicylic acid precursor method for preparing titanate microspheres. Sci China Mater, 2015, 58: 106–113
Bi W, Ye C, Xiao C, et al. Spatial location engineering of oxygen vacancies for optimized photocatalytic H2 evolution activity. Small, 2014, 10: 2820–2825
Wang Z, Yang C, Lin T, et al. H-doped black titania with very high solar absorption and excellent photocatalysis enhanced by localized surface plasmon resonance. Adv Funct Mater, 2013, 23: 5444–5450
Srinivasan N, Sakai E, Miyauchi M. Balanced excitation between two semiconductors in bulk heterojunction Z-scheme system for overall water splitting. ACS Catal, 2016, 6: 2197–2200
Li R, Weng Y, Zhou X, et al. Achieving overall water splitting using titanium dioxide-based photocatalysts of different phases. Energy Environ Sci, 2015, 8: 2377–2382
Ouyang S, Tong H, Umezawa N, et al. Surface-alkalinization-induced enhancement of photocatalytic H2 evolution over SrTiO3-based photocatalysts. J Am Chem Soc, 2012, 134: 1974–1977
Niishiro R, Tanaka S, Kudo A. Hydrothermal-synthesized SrTiO3 photocatalyst codoped with rhodium and antimony with visiblelight response for sacrificial H2 and 2 evolution and application to overall water splitting. Appl Catalysis B-Environ, 2014, 150-151: 187–196
Wu QS, Liu JW, Wang GS, et al. A surfactant-free route to synthesize BaxSr1-xTiO3 nanoparticles at room temperature, their dielectric and microwave absorption properties. Sci China Mater, 2016, 59: 609–617
Zhang J, Bang JH, Tang C, et al. Tailored Ti2-SrTiO3 heterostructure nanotube arrays for improved photoelectrochemical performance. ACS Nano, 2010, 4: 387–395
Wang B, Shen S, Guo L. SrTiO3 single crystals enclosed with highindexed {023} facets and {001} facets for photocatalytic hydrogen and oxygen evolution. Appl Catalysis B-Environ, 2015, 166-167: 320–326
Huang JR, Tan X, Yu T, et al. Hetero-structured Ti2/SrTiO3 nanotube array film with highly reactive anatase Ti2 {001} facets. J Mater Chem A, 2014, 2: 9975–9981
Huang BS, Su EC, Wey MY. Design of a Pt/Ti2–xNx/SrTiO3 triplejunction for effective photocatalytic H2 production under solar light irradiation. Chem Eng J, 2013, 223: 854–859
Maeda K. Z-scheme water splitting using two different semiconductor photocatalysts. ACS Catal, 2013, 3: 1486–1503
Lan ZA, Zhang G, Wang X. A facile synthesis of Br-modified g-C3N4 semiconductors for photoredox water splitting. Appl Catalysis B-Environ, 2016, 192: 116–125
Jiao Z, Zhang Y, Chen T, et al. Ti2 nanotube arraysmodified with Cr-doped SrTiO3 nanocubes for highly efficient hydrogen evolution under visible light. Chem Eur J, 2014, 20: 2654–2662
Zhao W, Li Y, Zhang M, et al. Direct microwave–hydrothermal synthesis of Fe-doped titania with extended visible-light response and enhancedH2-production performance. Chem Eng J, 2016, 283: 105–113
Hoang S, Berglund SP, Hahn NT, et al. Enhancing visible light photo-oxidation of water with Ti2 nanowire arrays via cotreatment with H2and NH3: synergistic effects between Ti3+ and N. J Am Chem Soc, 2012, 134: 3659–3662
Lin T, Yang C, Wang Z, et al. Effective nonmetal incorporation in black titania with enhanced solar energy utilization. Energy Environ Sci, 2014, 7: 967–972
Lian Z, Xu P, Wang W, et al. C60-decorated CdS/Ti2 mesoporous architectures with enhanced photostability and photocatalytic activity for H2 evolution. ACS Appl Mater Interfaces, 2015, 7: 4533–4540
Chang K, Mei Z, Wang T, et al. MoS2/graphene cocatalyst for efficient photocatalytic H2 evolution under visible light irradiation. ACS Nano, 2014, 8: 7078–7087
Chen X, Liu L, Yu PY, et al. Increasing solar absorption for photocatalysis with black hydrogenated titanium dioxide nanocrystals. Science, 2011, 331: 746–750
Xiao Y, Chen Y, Xie Y, et al. Hydrogenated Ce2-xSx mesoporous hollow spheres for enhanced solar driven water oxidation. Chem Commun, 2016, 52: 2521–2524
Tan H, Zhao Z, Zhu W, et al. Oxygen vacancy enhanced photocatalytic activity of pervoskite SrTiO3. ACS Appl Mater Interfaces, 2014, 6: 19184–19190
Yu X, Kim B, Kim YK. Highly enhanced photoactivity of anatase Ti2 nanocrystals by controlled hydrogenation-induced surface defects. ACS Catal, 2013, 3: 2479–2486
Chen X, Liu L, Huang F. Black titanium dioxide (Ti2) nanomaterials. Chem Soc Rev, 2015, 44: 1861–1885
Zhou W, Li W, Wang JQ, et al. Ordered mesoporous black Ti2 as highly efficient hydrogen evolution photocatalyst. JAmChem Soc, 2014, 136: 9280–9283
Zhao H, Wu M, Liu J, et al. Synergistic promotion of solar-driven H2 generation by three-dimensionally orderedmacroporous structured Ti2-Au-CdS ternary photocatalyst. Appl Catalysis B-Environ, 2016, 184: 182–190
Li K, Chai B, Peng T, et al. Preparation of AgIn5S8/Ti2 heterojunction nanocomposite and its enhanced photocatalytic H2 production property under visible light. ACS Catal, 2013, 3: 170–177
Wang Z, Wu L, Chen M, et al. Facile synthesis of superparamagnetic fluorescent Fe3O4/ZnS hollow nanospheres. J Am Chem Soc, 2009, 131: 11276–11277
Zhang Y, Wu B, Tang Y, et al. Prolonged electron lifetime in ordered Ti2mesophyll cell-likemicrospheres for efficient photocatalytic water reduction and oxidation. Small, 2016, 12: 2291–2299
Bai H, Juay J, Liu Z, et al. Hierarchical SrTiO3/Ti2 nanofibers heterostructures with high efficiency in photocatalytic H2 generation. Appl Catalysis B-Environ, 2012, 125: 367–374
Ng J, Xu S, Zhang X, et al. Hybridized nanowires and cubes: a novel architecture of a heterojunctioned Ti2/SrTiO3 thin film for efficient water splitting. Adv Funct Mater, 2010, 20: 4287–4294
Wu Z, Su Y, Yu J, et al. Enhanced photoelectrocatalytic hydrogen production activity of SrTiO3–Ti2 hetero-nanoparticle modified Ti2 nanotube arrays. Int JHydrogen Energy, 2015, 40: 9704–9712
Tian G, Chen Y, Zhou W, et al. 3D hierarchical flower-like Ti2 nanostructure: morphology control and its photocatalytic property. CrystEngComm, 2011, 13: 2994–3000
Ran J, Ma TY, Gao G, et al. Porous P-doped graphitic carbon nitride nanosheets for synergistically enhanced visible-light photocatalytic H2 production. Energy Environ Sci, 2015, 8: 3708–3717
Zhang M, Luo Z, Zhou M, et al. Photocatalytic water oxidation by layered Co/h-BCN hybrids. Sci China Mater, 2015, 58: 867–876
Paier J, Penschke C, Sauer J. Oxygen defects and surface chemistry of ceria: quantum chemical studies compared to experiment. Chem Rev, 2013, 113: 3949–3985
Bai X, Wang L, Zhu Y. Visible photocatalytic activity enhance-ment of ZnWO4 by graphene hybridization. ACS Catal, 2012, 2: 2769–2778
Li H, Chen J, Xia Z, et al. Microwave-assisted preparation of selfdoped Ti2 nanotube arrays for enhanced photoelectrochemical water splitting. J Mater Chem A, 2015, 3: 699–705
Yan J, Wang T, Wu G, et al. Tungsten oxide single crystal nanosheets for enhancedmultichannel solar light harvesting. AdvMater, 2015, 27: 1580–1586
Guo S, Zhao T, Jin Z, et al. Self-assembly synthesis of preciousmetal-free 3D ZnO nano/micro spheres with excellent photocatalytic hydrogen production from solar water splitting. J Power Sources, 2015, 293: 17–22
Zhang X, Peng T, Yu L, et al. Visible/near-infrared-light-induced H2 production over g-C3N4 co-sensitized by organic dye and zinc phthalocyanine derivative. ACS Catal, 2015, 5: 504–510
Hara S, Yoshimizu M, Tanigawa S, et al. Hydrogen and oxygen evolution photocatalysts synthesized from strontium titanate by controlled doping and their performance in two-step overall water splitting under visible light. J Phys Chem C, 2012, 116: 17458–17463
Zhang X, Yu L, Zhuang C, et al. Highly asymmetric phthalocyanine as a sensitizer of graphitic carbon nitride for extremely efficient photocatalytic H2 production under near-infrared light. ACS Catal, 2014, 4: 162–170
Luo Z, Poyraz AS, Kuo CH, et al. Crystalline mixed phase (anatase/rutile) mesoporous titanium dioxides for visible light photocatalytic activity. Chem Mater, 2015, 27: 6–17
Ran J, Zhang J, Yu J, et al. Earth-abundant cocatalysts for semiconductor-based photocatalytic water splitting. Chem Soc Rev, 2014, 43: 7787–7812
Acknowledgments
This work was supported by the National Natural Science Foundation of China (51272070, 21631004, 21371053, and 21376065), the Project for Foshan Innovation Group (2014IT100062), the Application Technology Research and Development Projects in Harbin (2013AE4BW051), the International Science & Technology Cooperation Program of China (2014DFR41110), the Natural Science Foundation of Heilongjiang province (E201455), the Postdoctoral Science-research Developmental Foundation of Heilongjiang province (LBH-Q13136), and the Special Fund of Technological Innovation Talents in Harbin City (2015RAQXJ003).
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Taoran Han received her MSc degree from Heilongjiang University under the supervision of Prof. Guohui Tian. Her research interests include the photocatalytic water splitting, photoelectrochemistry water splitting and controlled synthesis of nanomaterials.
Honggang Fu received his BSc and MSc degrees from Jilin University in 1984 and 1987, respectively. Then, he joined Heilongjiang University as an assistant professor. In 1999, he received his PhD degree fromHarbin Institute of Technology. He became a full professor in 2000. Currently, he is a Cheung Kong Scholar Professor. His interests focus on oxide-based semiconductor nanomaterials for solar energy conversion and photocatalysis, and crystalline carbon-based nanomaterials for energy conversion and storage. Up to now, he has published more than 260 peer-reviewed papers with over 4500 citations.
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Hydrogenated TiO2/SrTiO3 porous microspheres with tunable band structure for solar-light photocatalytic H2 and O2 evolution
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Han, T., Chen, Y., Tian, G. et al. Hydrogenated TiO2/SrTiO3 porous microspheres with tunable band structure for solar-light photocatalytic H2 and O2 evolution. Sci. China Mater. 59, 1003–1016 (2016). https://doi.org/10.1007/s40843-016-5126-1
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DOI: https://doi.org/10.1007/s40843-016-5126-1