Hierarchical architectures of ZnS–In2S3 solid solution onto TiO2 nanofibers with high visible-light photocatalytic activity

Liu, Chengbin; Meng, Deshui; Li, Yue; Wang, Longlu; Liu, Yutang; Luo, Shenglian

doi:10.1016/j.jallcom.2014.11.096

Cited by 31 publications

(7 citation statements)

References 41 publications

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“…Therefore, core-shell a-Fe 2 O 3 @TiO 2 composites show the efficient photocatalytic activity in visible light region. The reaction constants of core-shell a-Fe 2 O 3 @TiO 2 composites are smaller than those reported in recent literatures [61][62][63][64][65], which might be attributed to the different reaction conditions, such as the initial concentration, catalysts dosage. The photocatalytic activities for the core-shell a-Fe 2 O 3 @TiO 2 -0.75 nanorods obtained at different calcination temperature were also evaluated under the irradiation of UV light.…”

Section: Effect Of Calcination Temperaturecontrasting

confidence: 65%

Template-assisted synthesis of core–shell α-Fe2O3@TiO2 nanorods and their photocatalytic property

Chen

Xiao

et al. 2015

J Mater Sci

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Novel core-shell a-Fe 2 O 3 @TiO 2 composites were synthesized using a-FeOOH nanorods as hard template via a facile hydrothermal process. The as-prepared a-Fe 2 O 3 @TiO 2 composites were characterized by transmission electron microscopy, scanning electron microscopy, and X-ray powder diffraction. The effects of various experimental parameters, including thickness of TiO 2 coating and calcination temperature on the morphologies of the resulted products, were systematically investigated. Then, the photocatalytic degradation Rhodamine B (RhB) is chosen as a model reaction to evaluate the catalytic performance of the as-prepared a-Fe 2 O 3 @TiO 2 composites. The results confirmed that the present core-shell a-Fe 2 O 3 @TiO 2 composite nanorods exhibit the efficient optical response and the photocatalytic activity from the ultraviolet to the visible region. The thickness and crystal structure of TiO 2 affect the photocatalytic activity. The proposed synthesis strategy might provide a facile and effective method for developing noble semiconductors core-shell architecture nanocomposites.

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Section: Effect Of Calcination Temperaturecontrasting

confidence: 65%

Template-assisted synthesis of core–shell α-Fe2O3@TiO2 nanorods and their photocatalytic property

Chen

Xiao

et al. 2015

J Mater Sci

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“…Thus far, several TiO 2 modification strategies such as surface fluorination [23], noble metal deposition [24][25][26] and heterojunction construction [27][28][29][30][31][32][33] have been proposed. The modification techniques improve H 2 O 2 productivity by effectively inhibiting decomposition and promoting interfacial charge separation.…”

Section: Introductionmentioning

confidence: 99%

TiO2/In2S3 S-scheme photocatalyst with enhanced H2O2-production activity

et al. 2021

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Photocatalytic production of hydrogen peroxide (H 2 O 2 ) is an ideal pathway for obtaining solar fuels. Herein, an S-scheme heterojunction is constructed in hybrid TiO 2 /In 2 S 3 photocatalyst, which greatly promotes the separation of photogenerated carriers to foster efficient H 2 O 2 evolution. These composite photocatalysts show a high H 2 O 2 yield of 376 μmol/(L•h). The mechanism of charge transfer and separation within the S-scheme heterojunction is well studied by computational methods and experiments. Density functional theory and in-situ irradiated X-ray photoelectron spectroscopy results reveal distinct features of the S-scheme heterojunction in the TiO 2 /In 2 S 3 hybrids and demonstrate charge transfer mechanisms. The density functional theory calculation and electron paramagnetic resonance results suggest that O 2 reduction to H 2 O 2 follows stepwise one-electron processes. In 2 S 3 shows a much stronger interaction with O 2 than TiO 2 as well as a higher reduction ability, serving as the active sites for H 2 O 2 generation. The work provides a novel design of S-scheme photocatalyst with high H 2 O 2 evolution efficiency and mechanistically demonstrates the improved separation of charge carriers.

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“…However, solid solution Mn 1– x Cd x S as a photocatalyst has been reported recently, and it shows excellent photocatalytic hydrogen evolution from water, exhibiting great potential as a highly efficient photocatalyst. − It is well-known that Cd is a toxic metal which can cause environmental pollution, and the development of CdS is severely restricted due to the serious photocorrosion. − On the other hand, In 2 S 3 is supposed to be an environmentally friendly semiconductor with a narrow gap of 2–2.3 eV, which is similar to that of CdS (2.4 eV) . However, the pure In 2 S 3 was also rarely used as a photocatalyst for hydrogen evolution because of its poor photocatalytic activity which is attributed to the faster electron–hole recombination rate. , While the MnS and the In 2 S 3 are combined in a solid solution, the Mn 2 x In 2(1– x ) S 3 as a photocatalyst may have adjusted band-gap structures and improved separation efficiency of electron–hole pairs, thus improving the efficiency of photocatalytic hydrogen evolution …”

Section: Introductionmentioning

confidence: 99%

Mn_0.4In_1.6S₃ Nanoflower Solid Solutions for Visible-Light Photocatalytic Hydrogen Evolution

Liang

Guo

Huang

et al. 2019

ACS Appl. Nano Mater.

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A series of Mn2x In2(1–x)S3 (x < 0.5) nanoflower solid solutions (NSS) were synthesized by a simple one-step hydrothermal method using l-cysteine as S source and chelating reagent. The Mn2x In2(1–x)S3 NSS exhibit excellent hydrogen evolution performance compared with pure In2S3. In particular, the Mn0.4In1.6S3 nanoflower solid solution exhibits the best photocatalytic activity with a hydrogen evolution rate of up to 3570 μmol/(g h) under visible-light irradiation even without any noble metal or cocatalysts, which is about 22 times as high as the pure In2S3 dose, and it shows a favorable stability in catalytic and antiphotocorrosion properties. The apparent quantum efficiency of Mn0.4In1.6S3 NSS was 12.9% at 420 nm. The excellent photoactivity of Mn0. 4In1.6S3 NSS is mainly related to faster separation of photogenerated electron–hole pairs and the band-gap structures. Additionally, the Mn0.4In1.6S3 NSS possesses another active site of Mn for hydrogen evolution compared with pure In2S3, and density functional theory (DFT) simulations for the H binding free energy on active site (ΔG H* ) are performed to gain the fundamental insight into the role of Mn in Mn0. 4In1.6S3 NSS. Furthermore, because of the Mn active site, the Mn0.4In1.6S3 NSS has a very appealing ΔG H* of 0.74 eV, which is closer to zero than In as active sites in both Mn0.4In1.6S3 NSS (−3.83 eV) and pure In2S3 (−4.29 eV). The DFT-based first-principles calculations clearly shows that hydrogen adsorbed at different reaction sites with Mn and In have distinctly different free energies which further impact on hydrogen evolution performance. The research lights a new insight for photocatalytic hydrogen evolution, thus broadening routes for designing photocatalytic materials with multiple reaction sites for enhanced photocatalysis.

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Hierarchical architectures of ZnS–In2S3 solid solution onto TiO2 nanofibers with high visible-light photocatalytic activity

Cited by 31 publications

References 41 publications

Template-assisted synthesis of core–shell α-Fe2O3@TiO2 nanorods and their photocatalytic property

Template-assisted synthesis of core–shell α-Fe2O3@TiO2 nanorods and their photocatalytic property

TiO2/In2S3 S-scheme photocatalyst with enhanced H2O2-production activity

Mn_0.4In_1.6S₃ Nanoflower Solid Solutions for Visible-Light Photocatalytic Hydrogen Evolution

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Hierarchical architectures of ZnS–In2S3 solid solution onto TiO2 nanofibers with high visible-light photocatalytic activity

Cited by 31 publications

References 41 publications

Template-assisted synthesis of core–shell α-Fe2O3@TiO2 nanorods and their photocatalytic property

Template-assisted synthesis of core–shell α-Fe2O3@TiO2 nanorods and their photocatalytic property

TiO2/In2S3 S-scheme photocatalyst with enhanced H2O2-production activity

Mn0.4In1.6S3 Nanoflower Solid Solutions for Visible-Light Photocatalytic Hydrogen Evolution

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Mn_0.4In_1.6S₃ Nanoflower Solid Solutions for Visible-Light Photocatalytic Hydrogen Evolution