Enhanced photocatalytic degradation of tetracycline under visible light by using a ternary photocatalyst of Ag3PO4/AgBr/g-C3N4 with dual Z-scheme heterojunction

Yu, Hao; Wang, Danyang; Zhao, Bin; Lü, Ying; Wang, Xinhong; Zhu, Suiyi; Qin, Weichao; Huo, Mingxin

doi:10.1016/j.seppur.2019.116365

Cited by 147 publications

(47 citation statements)

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“…The performances of the g-CN/SmFeO 3 (80:20) composite are better than those of g-CNbased catalysts recently developed for the degradation of TC (P-and S-doped g-CN, C-doped g-CN, WO 3 /g-CN/Bi 2 O 3 or Ag 3 PO 4 /AgBr/g-CN) [51][52][53][54]. The photodegradation yield is of 70-85% after ca.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity

et al. 2020

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In this work, novel heterostructured photocatalysts associating graphitic carbon nitride (g-CN) and SmFeO 3 were prepared via a mixing-ultrasonication process. Structural, optical and morphological characterizations demonstrate that the interfacial junction between g-CN and SmFeO3 is well established for all g-CN/SmFeO3 composites prepared with g-CN:SmFeO 3 weight ratio of 20:80, 50:50 and 80:20. The g-CN/SmFeO 3 (80:20) composite exhibits the highest photocatalytic activity for the degradation of pollutants like the Orange II dye and the tetracycline hydrochloride antibiotic under visible light irradiation. This high photocatalytic activity originates from the enhanced light absorption over the whole visible region compared to pure g-CN and from the improved separation and transfer of photogenerated electron/hole pairs as demonstrated by photoluminescence and photocurrent measurements. A Z-scheme charge carrier transfer mechanism was demonstrated for the photocatalytic reactions. The g-CN/SmFeO 3 (80:20) catalyst was also demonstrated to be stable and can be reused up to six times without significant alteration of the activity.

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Section: Photocatalytic Activitymentioning

confidence: 99%

Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity

et al. 2020

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“…For instance, tetracycline hydrochloride (TCH), as one of the main components of pharmaceutical wastewater, is usually chemically stable and hardly removed by conventional biochemical and physical measures. It can bring about a series of environmental concerns such as causing the formation of resistant microorganisms and upsetting the natural balance [ 1 , 2 , 3 , 4 ]. To mitigate the threats and promote the sustainable and rapid development of industry, it is an emergency to exploit novel technologies aimed at the purification of industrial wastewater.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

Jiang

Huang

Wei³

et al. 2021

Nanomaterials

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The rational design of direct Z-scheme heterostructural photocatalysts using solar energy is promising for energy conversion and environmental remediation, which depends on the precise regulation of redox active sites, rapid spatial separation and transport of photoexcited charge and a broad visible light response. The Bi2WO6 materials have been paid more and more attention because of their unique photochemical properties. In this study, S2− doped Bi2WO6-x coupled with twin crystal ZnIn2S4 nanosheets (Sov−BWO/T−ZIS) were prepared as an efficient photocatalyst by a simple hydrothermal method for the removal of tetracycline hydrochloride (TCH). Multiple methods (XRD, TEM, XPS, EPR, UV vis DRS, PL etc.) were employed to systematically investigate the morphology, structure, composition and photochemical properties of the as-prepared samples. The XRD spectrum indicated that the S2− ions were successfully doped into the Sov−BWO component. XPS spectra and photoelectrochemical analysis proved that S2− served as electronic bridge and promoted captured electrons of surface oxygen vacancies transfer to the valence band of T−ZIS. Through both experimental and in situ electron paramagnetic resonance (in situ EPR) characterizations, a defined direct Z-scheme heterojunction in S-BWO/T−ZIS was confirmed. The improved photocatalytic capability of S-BWO/T−ZIS results ascribed that broadened wavelength range of light absorption, rapid separation and interfacial transport of photoexcited charge, precisely regulated redox centers by optimizing the interfacial transport mode. Particularly, the Sov−50BWO/T−ZIS Z-scheme heterojunction exhibited the highest photodegradation rate was 95% under visible light irradiation. Moreover, this heterojunction exhibited a robust adsorption and degradation capacity, providing a promising photocatalyst for an organic pollutant synergistic removal strategy.

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“…Besides, as a semiconductor material with good photosensitivity, silver bromide (AgBr) is easy to synthesize, possesses stable physical and chemical properties, a narrow band gap, and outstanding renewability [22,23]. What's more, numerous heterojunctions were synthesized based on AgBr according to previous researches such as AgPO 3 /AgBr/g-C 3 N 4 [24], BiOBr/AgBr/LaPO 4 [25], and AgBr/p-g-C 3 N 4 [26]. Because AgBr possesses a narrow band gap, strong photosensitivity and high charge separation ability, also AgBr is easiest to produce metallic Ag under illumination, which can promote electron transfer in heterojunctions and improve charge separation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

et al. 2020

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Promoting the separation of photogenerated charges and enhanced optical absorption capacity is the main means to modify photocatalytic capacities to advance semiconductor photocatalyst applications. For the first time, a novel ternary photocatalyst for dual Z-scheme system AgBr/LaNiO3/g-C3N4 (ALG) was prepared via a modest ultrasound-assisted hydrothermal method. The results indicated that LaNiO3 nanoballs and AgBr nanoparticles were successfully grown on the surface of g-C3N4 nanosheets. A dual Z-scheme photocatalytic reaction system could be constructed based on the energy band matching within AgBr, LaNiO3 and g-C3N4. Metallic Ag during the photocatalytic reaction process acted as the active electrons transfer center to enhance the photocatalytic charge pairs separation. The chemical composition of ALG was optimized and composites with 3% AgBr, 30% LaNiO3 and 100% g-C3N4 which was noted as 3-ALG displayed the best photocatalytic performance. A total of 92% of norfloxacin (NOR) was photodegraded within two hours over ALG and the photodegradation rate remained >90% after six cycles. The main active species during the degradation course were photogenerated holes, superoxide radical anion and hydroxyl radical. A possible mechanism was proposed based on the synergetic effects within AgBr, LaNiO3 and g-C3N4. This work would offer a credible theoretical basis for the application of dual Z-scheme photocatalysts in environment restoration.

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Enhanced photocatalytic degradation of tetracycline under visible light by using a ternary photocatalyst of Ag3PO4/AgBr/g-C3N4 with dual Z-scheme heterojunction

Cited by 147 publications

References 50 publications

Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity

Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

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Enhanced photocatalytic degradation of tetracycline under visible light by using a ternary photocatalyst of Ag3PO4/AgBr/g-C3N4 with dual Z-scheme heterojunction

Cited by 147 publications

References 50 publications

Graphitic carbon nitride/SmFeO3 composite Z-scheme photocatalyst with high visible light activity

Graphitic carbon nitride/SmFeO3 composite Z-scheme photocatalyst with high visible light activity

Investigation of the Kinetics and Reaction Mechanism for Photodegradation Tetracycline Antibiotics over Sulfur-Doped Bi2WO6-x/ZnIn2S4 Direct Z-Scheme Heterojunction

Synthesis of Novel Ternary Dual Z-scheme AgBr/LaNiO3/g-C3N4 Composite with Boosted Visible-Light Photodegradation of Norfloxacin

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Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity

Graphitic carbon nitride/SmFeO₃ composite Z-scheme photocatalyst with high visible light activity