One-pot construction of Ta-doped BiOCl/Bi heterostructures toward simultaneously promoting visible light harvesting and charge separation for highly enhanced photocatalytic activity

The increasing concentration of residual ciprofloxacin (CIP) can cause potential harm to the environment. Photocatalysis has been regarded as an effective method for the degradation of CIP. Bi/BiVO4 with excellent photocatalytic performance was synthesized partial reduction with NaBH4. The structure, morphology, composition, and optical performance of BiVO4 and Bi/BiVO4 were characterized by a variety of techniques. The results showed that the Bi/BiVO4 exhibits high photocatalytic activity in the degradation of CIP. Comparison of BiVO4 and Bi/BiVO4 has lower photoluminescence intensity and higher photocurrent responses intensity. The introduction of Bi made Bi/BiVO4 have a higher charge separation efficiency and generate more active free radicals. In addition, the radical trapping experiments revealed that superoxide free radicals and holes were the main active free radicals during the degradation of CIP. The pathway of CIP degradation was investigated through high performance liquid chromatography-mass spectrometry, and a possible degradation mechanism was proposed.

show abstract

“…The diffraction peak of 2θ = 27.2 • , which belongs to the (012) crystal plane of metallic Bi (JCPDS No. , could be found [34,35].…”

Section: Characterization Of the Prepared Samplesmentioning

confidence: 92%

Insights into the Mechanism of the Bi/BiVO4 Composites for Improved Photocatalytic Activity

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Tao and co-workers have prepared Ta-doped Bi/BiOCl (denoted as Ta−Bi/BiOCl) heterostructures through a onestep solvothermal synthetic approach. 89 During the fabrication process, Bi(NO 3 ) 3 and TaCl 5 were dispersed into glycol under magnetic stirring, finally leading to the formation of Ta-doped Bi/BiOCl heterostructures, in which glycol acted as both a reducer and a capping agent. Therefore, combining metal interface engineering with element doping is an efficient strategy to improve both the solar light harvesting and the separation of charge carriers for BiOCl-based photocatalysts.…”

Section: Categories Of Biocl-based Photocatalystsmentioning

confidence: 99%

“…According to previous research, BiOCl-based photocatalysts can be divided into three main categories: metal/BiOCl, semiconductor/BiOCl, and carbon/BiOCl heterogeneous structures. − ,,,,− ...…”

Section: Categories Of Biocl-based Photocatalystsmentioning

confidence: 99%

Synthesis, Functional Modifications, and Diversified Applications of Hybrid BiOCl-Based Heterogeneous Photocatalysts: A Review

Yang

Sun

Cui

et al. 2021

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

The construction and regulation of heterogeneous interfaces are beneficial to improve solar light harvesting and photocharge separation of hybrid BiOCl-based photocatalysts, which are attributed to the synergistic effects that originate from the integrated interaction between disparate components. With the rapid development of synthetic technologies, hybrid BiOCl-based micro-/nanostructures with diversified components, morphologies, and sizes have been well prepared. Moreover, hybrid BiOCl-based photocatalysts have presented a promising potential for various photocatalytic applications, such as organic pollutant degradation, hydrogen production, NO removal, CO2 reduction, heavy metal ion detection, disinfection, nitrogen fixation, and alcohol oxidation. Previously, several review articles have mainly summarized the advances made in synthetic methods, morphological control, modification strategies, and applications of the bare BiOCl micro-/nanostructures. However, a comprehensive overview based on the type of species and the corresponding correlations between microstructures, performances, as well as photocatalytic mechanisms has been less reported for hybrid BiOCl-based photocatalysts so far. Therefore, a comprehensive understanding of the basic theory and research progress of hybrid BiOCl-based photocatalysts is imperative. This review aims to provide an overview of the important advances made in eight types of hybrid BiOCl-based photocatalysts, including metal/BiOCl, metal oxide/BiOCl, metal sulfide/BiOCl, BiOX (X = Cl, Br, I)/BiOCl, AgX (X = Cl, Br, I)/BiOCl, organics/BiOCl, carbon/BiOCl, and other BiOCl-based multicomponents. In each classification, the synthetic methods, modification strategies, relationships between interfacial microstructures, and enhanced performances are discussed based on some typical examples. Additionally, some scientific issues and potential directions are also given. Hopefully, this review paper will provide a useful reference for researchers currently focusing on exploring new BiOCl-based photocatalysts.

show abstract

“…However, its large band gap energy (3.2 eV) restricts its activity only under UV light [27][28][29][30]. In order not only to extend BiOCl's visible light harvesting properties, but also to enhance its photocatalytic activity, researchers have proposed many morphological and structural modifications [31][32][33]. Zang et al prepared a Z-scheme Ag/BiOCl/AgIO 3 heterojunction, characterized by desired electronic properties, showing higher rhodamine B degradation rate than pure BiOCl [31].…”

Section: Introductionmentioning

confidence: 99%

“…Zang et al prepared a Z-scheme Ag/BiOCl/AgIO 3 heterojunction, characterized by desired electronic properties, showing higher rhodamine B degradation rate than pure BiOCl [31]. In a similar manner, a heterogeneous doped interface Ta-BiOCl/Bi also showed improved catalytic activity for the elimination of both rhodamine B and tetracycline compared to Ta-BiOCl, BiOCl/Bi and BiOCl [32]. Moreover, the photodegradation of ciprofloxacin was greatly enhanced using PVP-induced Bi 2 S 3 /BiOCl heterostructures [33].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Valsartan by MoS2/BiOCl Heterojunctions

et al. 2021

View full text Add to dashboard Cite

In the present study, the removal of valsartan (VLS), an antihypertensive agent, under simulated solar radiation with the use of molybdenum sulfide-bismuth oxychloride composites (MoS2/BiOCl), of variable MoS2 content (0.1–10.0 wt.%) was investigated. The physicochemical properties of the photocatalysts were examined by XRD, DRS, BET and TEM/HRTEM. Preliminary tests were conducted to examine the photocatalytic efficiency of the synthesized MoS2/BiOCl composites towards VLS degradation in ultrapure water (UPW). It was found that the activity of pure BiOCl is improved with the addition of MoS2. The degradation rate was maximized with the use of the catalyst containing 0.25 wt.% MoS2. It was also found that the increase in catalyst concentration (50–1000 mg/L) enhances VLS degradation. It was found that VLS removal decreased by increasing VLS concentration. The effect of the water matrix on VLS removal was studied by carrying out experiments in real and synthetic water matrices. VLS degradation in UPW was faster than in bottled water (BW) and wastewater (WW), mainly due to the existence of organic matter in real aqueous media. Lastly, 0.25 wt.% MoS2/BiOCl showed great stability after 360 min of irradiation, serving as a promising catalyst for water remediation of emerging contaminants under solar irradiation.

show abstract

One-pot construction of Ta-doped BiOCl/Bi heterostructures toward simultaneously promoting visible light harvesting and charge separation for highly enhanced photocatalytic activity

Cited by 61 publications

References 47 publications

Insights into the Mechanism of the Bi/BiVO4 Composites for Improved Photocatalytic Activity

Insights into the Mechanism of the Bi/BiVO4 Composites for Improved Photocatalytic Activity

Synthesis, Functional Modifications, and Diversified Applications of Hybrid BiOCl-Based Heterogeneous Photocatalysts: A Review

Photocatalytic Degradation of Valsartan by MoS2/BiOCl Heterojunctions

Contact Info

Product

Resources

About