Novel urea assisted hydrothermal synthesis of hierarchical BiVO4/Bi2O2CO3 nanocomposites with enhanced visible-light photocatalytic activity

Madhusudan, Puttaswamy; Ran, Jingrun; Zhang, Jun; Wang, Yuanyuan; Liu, Gang

doi:10.1016/j.apcatb.2011.09.014

Cited by 402 publications

(170 citation statements)

References 64 publications

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“…The N 2 adsorption-desorption isotherms of ZCS, NiS-ZCS, Ni-ZCS, and Ni(OH) 2 -ZCS are of type IV with H3 hysteresis loops ( Figure 5), which implies the presence of well-defined mesopores. [36,37] The pore size distribution curves show a wide range of 2-100 nm ( Figure 5 inset), which further confirms the existence of mesopores. Quantitative details of the BET surface areas and pore volumes of the as-prepared samples are given in Table 1.…”

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confidence: 75%

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

et al. 2014

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The application of various earth-abundant Ni species, such as NiS, Ni, Ni(OH)2 , and NiO, as a co-catalyst in a Znx Cd1-x S system for visible-light photocatalytic H2 production was investigated for the first time. The loading of Ni or NiS enhanced the photocatalytic activity of Znx Cd1-x S because they could promote the electron transfer at the interface with Znx Cd1-x S and catalyze the H2 evolution. Surprisingly, Ni(OH)2 -loaded Znx Cd1-x S exhibits a very high photocatalytic H2 -production rate of 7160 μmol h(-1) g(-1) with a quantum efficiency of 29.5 % at 420 nm, which represents one of the most efficient metal sulfide photocatalysts without a Pt co-catalyst to date. This outstanding activity arises from the pronounced synergetic effect between Ni(OH)2 and metallic Ni formed in situ during the photocatalytic reaction. However, the loading of NiO deactivated the activity of Znx Cd1-x S because of their unmatched conduction band positions. This paper reports the optimization of the Znx Cd1-x S system by selecting an appropriate Ni-based co-catalyst, Ni(OH)2 , from a series of Ni species to achieve the highest photocatalytic H2 -production activity for the first time and also reveals the roles of these Ni species in the photocatalytic activity.

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confidence: 75%

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

et al. 2014

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“…The n is determined by the type of optical transition of a semiconductor (n = 1 for a direct transition and n = 4 for an indirect transition). As reported, the n value of Bi 2 S 3 [33] and (BiO) 2 CO 3 [30] is 1 and 4, respectively. From the plots of (Ahm) 2 versus (hm) shown in Fig.…”

Section: Resultsmentioning

confidence: 85%

“…element doping [8,11,12], photosensitization [27], and metal surface plasmonic resonance (SPR) [28] have ever been employed for the improvement of as-known semiconductor-based catalysts. Among them, semiconductor coupling cannot only broaden the light absorption range but also promote the separation of photo-induced electronhole pairs, resulting in remarkably improved photocatalytic activity [29][30][31]. It is reported that as a typical semiconductor bismuth sulfide (Bi 2 S 3 ) can exhibit highly enhanced visible light response after combining with TiO 2 [32], Bi 2 WO 6 [33], BiOCl [34] or (BiO) 2 CO 3 [35].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted synthesis of amorphous Bi2S3 coupled (BiO)2CO3 catalyst with improved visible light-responsive photocatalytic activity

Zhu

Meng

2014

J Mater Sci

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A series of Bi 2 S 3 /(BiO) 2 CO 3 composite photocatalysts with different loadings of amorphous Bi 2 S 3 were successfully synthesized through an ultrasonic-assisted ionexchange reaction between thioacetamide (CH 3 CSNH 2 ) and (BiO) 2 CO 3 , and characterized by XRD, XPS, BET, EELS, EDX, SEM, TEM/HRTEM, UV-Vis, and photoluminescence (PL) techniques. The results of TEM/HRTEM, EELS, and EDX indicate that the composite catalyst Bi 2 S 3 / (BiO) 2 CO 3 has been successfully synthesized with the deposited Bi 2 S 3 present in amorphous state on the surface of (BiO) 2 CO 3 . The activities of the catalysts for RhB degradation under visible light show that the catalyst prepared under ultrasonic is more active than the one synthesized without ultrasonic. The optimized sample Bi 2 S 3 / (BiO) 2 CO 3 (U5.0) exhibits a much higher activity, about 4.8 times to that of pure (BiO) 2 CO 3 . Based upon the band structures of Bi 2 S 3 /(BiO) 2 CO 3 , it is deduced that the migration of the visible light-induced electrons from the conduction band of Bi 2 S 3 to that of (BiO) 2 CO 3 should have facilitated the separation of photogenerated carriers, as confirmed by the suppressed photoluminescence spectra. Using different scavengers, the ÁO 2 -and holes are clearly identified as the main oxidative species for RhB photodegradation. In light of these observations, a potential photocatalytic mechanism of RhB degradation over Bi 2 S 3 / (BiO) 2 CO 3 is proposed.

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“…Then the carriers transfer to the catalyst surface to react with the adsorbed reactants and the migration direction of the photo-generated charge carriers is dependent on the relative band edge positions of the two components in composite photo-catalysts [49].…”

Section: Resultsmentioning

confidence: 99%

Atypical BiOCl/Bi2S3 hetero-structures exhibiting remarkable photo-catalyst response

Tanveer

Qadeer

et al. 2017

Sci. China Mater.

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Novel urea assisted hydrothermal synthesis of hierarchical BiVO4/Bi2O2CO3 nanocomposites with enhanced visible-light photocatalytic activity

Cited by 402 publications

References 64 publications

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Ultrasonic-assisted synthesis of amorphous Bi2S3 coupled (BiO)2CO3 catalyst with improved visible light-responsive photocatalytic activity

Atypical BiOCl/Bi2S3 hetero-structures exhibiting remarkable photo-catalyst response

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Novel urea assisted hydrothermal synthesis of hierarchical BiVO4/Bi2O2CO3 nanocomposites with enhanced visible-light photocatalytic activity

Cited by 402 publications

References 64 publications

Enhanced Visible‐Light Photocatalytic H2 Production by ZnxCd1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Enhanced Visible‐Light Photocatalytic H2 Production by ZnxCd1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Ultrasonic-assisted synthesis of amorphous Bi2S3 coupled (BiO)2CO3 catalyst with improved visible light-responsive photocatalytic activity

Atypical BiOCl/Bi2S3 hetero-structures exhibiting remarkable photo-catalyst response

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Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts