CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Fang Li,Dennis Y.C. Leung
A heterojunction structure of BiVO 4 coupled with a narrow bandgap photocatalyst Bi 2 S 3 was fabricated forming a composite material with strong capacity in visible light absorption and enhancement in the separation rate of photogenerated charge carriers owing to their suitable band structures. As a result, efficiency of hydrogen production through photoelectrocatalysis is highly enhanced. The morphology and composition of as-prepared sample electrodes are measured through X-Ray Diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The performance of the hybrid nanostructure Bi 2 S 3 /BiVO 4 photoelectrode was found to be related to the growing process of Bi 2 S 3 nanowire during the hydrothermal preparation process. The composited Bi 2 S 3 /BiVO 4 photoanode achieved a photoconversion efficiency of 2.9% which is nearly 3-fold that of the bare BiVO 4 electrode under visible light irradiation, while the hydrogen production was greatly enhanced by nearly 5-fold in the photoelectrocatalytic hydrogen production reaction.
研究领域:
材料科学
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能源科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiong Tao,Fengxi Chen,Jun Li,Yunling Liu,Xiaowu Hu,Rong Chen
Emerging Bi 2 S 3 -based nanotechnology has great potential in Cr(VI)-contaminated wastewater treatment . In this work, it was found for the first time that Bi 2 S 3 nanoparticles (BS-D) prepared from dual sulfur sources of L-cysteine and ammonium sulfide efficiently promoted Cr(VI) removal with excellent selectivity for simultaneous removal of Cr(VI) and Cu 2+ from aqueous solutions containing various co-existing ions (including Na + , K + , Ca 2+ , Zn 2+ , Ni 2+ , Cd 2+ , NO 3 – , SO 4 2− and Cl − ) at pH > 3, preferably at pH of 4.5. Besides, BS-D had stable performance for co-removal of Cr(VI) and Cu 2+ in five recycling tests. Kinetic and thermodynamic studies indicated that the adsorption of Cr(VI) or Cu 2+ by BS-D was a spontaneous endothermic process and conformed to pseudo-second-order kinetic model. The adsorbed Cr(VI) ions were partially reduced to Cr(III), which were leached into the solution at pH ≤ 3, inhibiting the adsorption of Cu 2+ on BS-D and its promotional effect on Cr(VI) removal by BS-D. The mutual promotional effects between Cu 2+ and Cr(VI) during their co-removal by BS-D were ascribed to electrostatic attraction between HCrO 4 − and Cu 2+ and smaller pH variation in mixed Cr(VI)-Cu 2+ solutions. Finally, potential applications of BS-D were demonstrated by co-removal of Cr(VI) and Cu 2+ from real electroplating wastewater and contaminated groundwater. This work provided a promising BS-D adsorbent for Cr(VI)-contaminated wastewater treatment, and shed insight on the influence of Cu 2+ on the Cr(VI) removal by BS-D.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Xiao Hui-Jin,Liao Xiao-Jing,Wang Hui,Ren Shu-Wei,Cao Jun-Tao,Liu Yan-Ming
A novel signal-increased photoelectrochemical (PEC) biosensor for l-cysteine (L-Cys) was proposed based on the Bi2MoO6–Bi2S3 heterostructure formed in situ on the indium–tin oxide (ITO) electrode. To fabricate the PEC biosensor, Bi2MoO6 nanoparticles were prepared by a hydrothermal method and coated on a bare ITO electrode. When L-Cys existed, Bi2S3 was formed in situ on the interface of the Bi2MoO6/ITO electrode by a chemical displacement reaction. Under the visible light irradiation, the Bi2MoO6–Bi2S3/ITO electrode exhibited evident enhancement in photocurrent response compared with the Bi2MoO6/ITO electrode, owing to the signal-increased sensing system and the excellent property of the formed Bi2MoO6–Bi2S3 heterostructure such as the widened light absorption range and efficient separation of photo-induced electron–hole pairs. Under the optimal conditions, the sensor for L-Cys detection has a linear range from 5.0 × 10−11 to 1.0 × 10−4 mol L−1 and a detection limit of 5.0 × 10−12 mol L−1. The recoveries ranging from 90.0% to 110.0% for determining L-Cys in human serum samples validated the applicability of the biosensor. This strategy not only provides a method for L-Cys detection but also broadens the application of the PEC bioanalysis based on in situ formation of photoactive materials.
研究领域:
生物传感技术
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材料科学与工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jialong Li,Fanming Meng,Hao Wu,Han Zhang
The construction of Z-scheme heterostructures is one of the most effective strategies to improve photocatalytic efficiency. In this study, Ag + doped ZnIn 2 S 4 /Bi 2 S 3 composite nanosphere materials with different mass fractions of Bi 2 S 3 were successfully synthesized by the solvothermal method. Systematic studies showed that the construction of heterogeneous structures and Ag + doping could extend the optical absorption edge and provide more active sites. More importantly, it was shown by photoelectrochemical and PL spectroscopy tests that Ag: ZnIn 2 S 4 /Bi 2 S 3 has strong visible light absorption and photocarrier transfer capability. In addition, the Z-scheme mechanism of Ag: ZnIn 2 S 4 /Bi 2 S 3 was investigated by electron spin response (ESR) and active substance capture experiments, which confirmed that both superoxide radicals( O − 2 ) and hydroxyl radicals( OH) were involved in the photocatalytic reaction. The results showed that the optimized Ag: ZnIn 2 S 4 /2.5%Bi 2 S 3 degraded TC by 89.7%, 1.87 times higher than the original ZnIn 2 S 4 . This work provides a promising method for the construction of Z-scheme heterojunctions based on ZnIn 2 S 4 .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
·
IF 3.387
Yuwei Mi,Haiping Li,Yongfang Zhang,Renjie Zhang,Wanguo Hou
One-dimensional (1D) belt-like Bi 2 S 3 /BiOCl composites were synthesized by a facile one-pot solvothermal method, using bismuth subsalicylate as the Bi source and, in particular, as the morphological template. The synthesized composites were characterized by many techniques, such as XRD, SEM, XPS, TEM and UV–vis diffuse reflectance and photoluminescence spectra. Photocatalytic activity of the composites was evaluated via catalytic degradation of salicylic acid (SA) and Rhodamine B (RhB) under visible light irradiation. The belt-like composites show a heterojunction structure in which the Bi 2 S 3 nanoparticles are uniformly dispersed in the BiOCl matrix with dominant exposed (010) facets. They exhibit enhanced photodegradation efficiency in comparison with pure belt-like Bi 2 S 3 and BiOCl. With increasing Bi 2 S 3 content, the photodegradation efficiency of the composites increases then decreases. The Bi 2 S 3 /BiOCl composite with a Bi 2 S 3 content of ∼2% exhibits the highest photocatalytic activity. The apparent first-order photodegradation rate constants of the composite for SA (∼0.048 h −1 ) and RhB (∼0.299 min −1 ) are significantly higher than those of the pure BiOCl and Bi 2 S 3 for SA (∼0 and ∼0.0007 h −1 ) and RhB (∼0.102 and ∼0.002 min −1 ), respectively. The enhancement in photocatalytic activity is attributed to the efficient separation of photoinduced electrons and holes along with the increased specific surface area and visible-light absorption. The holes and superoxide radicals are the major active species. In addition, the belt-like Bi 2 S 3 /BiOCl photocatalysts exhibit excellent stability and reusability. This work provides a facile strategy for synthesis of 1D hierarchical Bi-based composite photocatalysts, and demonstrates the potential of belt-like Bi 2 S 3 /BiOCl composites for application in environmental remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Lingnan Wang,Zhenbang Liu,Dandan Wang,Shuang Ni,Dongxue Han,Wei Wang,Li Niu
Along with continuous growing widespread adulterations of botanical drugs, the necessity for drug quality monitoring has become more popular than ever. Considering that antioxidants are widely found in natural plant pharmaceuticals, gallic acid (GA) is often regarded as the reference standard to make sure whether these are up to grade as guided by Chinese Pharmacopeia. Herein, a novel Bi 2 MoO 6 /Bi 2 S 3 photoelectrochemical sensor has been successfully involved toward selective GA analysis to supervise drug quality, in which γ-Bi 2 MoO 6 nanobelts were treated as template nanocrystal and scaffold. Such Bi 2 S 3 accommodated in Bi 2 MoO 6 nanobelts render platform with excellent light-harvesting capability, selectivity and reproducibility. Concerned mechanism was in-depth pursued through theoretical computation and morphology speculation, inferring that two aspects mainly contribute to the findings: (1) engineering particular structure brings about surface dangling bonds , which raises the likelihood of electrostatic interaction with opposite charges; (2) appending Bi 2 S 3 to the Bi 2 MoO 6 nanobelts acted as a new avenue to mediate photoelectrochemical behavior, nearly devoid of interference effect. Our work opens up broad possibilities for finely distinguishing different antioxidants. As the extension of this simple and valid strategy, photoelectrochemistry will become a potent backing for quality guaranty in drug field, which offers an entry into ensuring good consistency in batch production .
研究领域:
材料科学
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分析化学
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药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 40
·61148-61160
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IF 5.19
Cao Yunmeng,Yue Lin,He Zhuang,Li Zaixing,Lian Jing,Zhou Shilei,Luo Xiao
In this study, the flower-shaped Bi 2 S 3 /g-C 3 N 4 -2.6 heterojunction obtained by solvothermal method and its photocatalytic degradation efficiency of rhodamine B (RhB) and tetracycline (TC) in aqueous solution within 40 min is as high as 98.8% and 94.6%. For RhB degradation, the photocatalytic reaction rate constant (k) of Bi 2 S 3 /g-C 3 N 4 -2.6 is approximately 1.8 and 45.5 times that of Bi 2 S 3 and g-C 3 N 4 . For TC, k is 3.1 and 2.4 times that of Bi 2 S 3 and g-C 3 N 4 , respectively. The key to determining the high catalytic activity of Bi 2 S 3 /g-C 3 N 4 lies in the formation of a good heterojunction between Bi 2 S 3 and g-C 3 N 4 , which accelerates the electron transfer rate between the heterojunction interface and effectively avoids electron–hole recombination. The effects of catalyst dosage, different pH values, inorganic anions, and capture agents on the photodegradation performance of RhB were investigated. The results show that the catalyst dosage is 1.33 g/L, and the solution pH is in the range of 5–9, which has the best removal effect on pollutants, and the isolation of holes ( h + ) with strong oxidizing ability promotes the collapse of pollutant molecules. Combined with electrochemical tests, a possible degradation mechanism was advised.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Jiawen Wu,Panpan Ou,Yu Lin,Xuecai Tan,Fucun Wei,Yan Mi,Shaogang Liu,Kejing Huang
Due to the environmental pollution and food safety problems that caused by the abuse of chlorpyrifos (CPF), a strategy of which is detected with high efficiency is urgently demanded. Herein, a photoelectrochemical sensor which using TiO 2 nanotube arrays with oxygen vacancies (V o -TNTAs) as electrode was constructed. Oxygen vacancies are introduced into TNTAs in order to generate a new defect level that narrows its band gap. The bismuth sulfide nanoparticles are loaded on V o -TNTAs to accelerate the separation of electron-hole pairs. Thus, the Bi 2 S 3 /V o -TNTAs hetero-structure is designed and constructed. With the existence of CPF, a complex which composed by Bi ions and CPF will be formed in situ to block the electrons transfer from electron donor (ascorbic acid) to Bi 2 S 3 , causing the weakened photocurrent. Consequently, the Bi 2 S 3 /V o -TNTAs electrode possess higher photocurrent response than that of pure V o -TNTAs and TNTAs. The Bi 2 S 3 /V o -TNTAs-based PEC sensor displays a linear range of 0.07–3.0 μmol/L with a detection limit of 6.0 nmol/L (S/N = 3) and can be utilized for CPF detection in lettuce and cucumber samples with recoveries of 95.7 to 110 %.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2018
·
IF 1.1
Yanan Li,Zhongmin Liu,Yaru Li,Yongchuan Wu,Jitao Chen,Yanjun Liu,Ping Na
The Bi 2 S 3 -TiO 2 -RGO composites were synthesized by a facile one-step hydrothermal method and applied for the photocatalytic degradation of Rhodamine B (Rh B) under the visible light. The Bi 2 S 3 -TiO 2 -RGO composites were characterized by transmission electron microscopy, X-ray diffraction, Raman and Fourier transform infrared spectrometer. The results indicated that the Bi 2 S 3 -TiO 2 -RGO composites were successfully prepared, and Ti-O-C and S-C bonds were existing among Bi 2 S 3 , TiO 2 as well as RGO. Furthermore, the photocatalytic ability of Bi 2 S 3 -TiO 2 -RGO composites was excellent under visible light due to its responding to the whole visible light region, low recombination rate of photogenerated electron–hole pairs and relatively negative conduction band. Rh B photocatalytic degradation rate was 99.5% after 50 min and still could reach 98.4% after five cycles. Finally, a formation mechanism as well as a photocatalytic mechanism of Bi 2 S 3 -TiO 2 -RGO composites were proposed based on the experimental results.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Litao Jia,Chenjia Yang,Xiaoyong Jin,Dan Wang,Fanghua Li
A hot research topic in visible-light-driven photoelectrocatalytic (PEC) oxidation technology is the development of superior photoanode materials. The design of the photoanode system with a direct Z-scheme charge transfer mechanism is crucial to achieving effective charge separation for sustainable photoelectrocatalysis. Here, a novel Bi / Bi 2 S 3 /α-MoO 3 heterostructure was successfully assembled by a simple and feasible strategy. The direct Z-scheme heterogeneous formed between Bi 2 S 3 and α-MoO 3 has the advantages of low resistance, high optical response current and the surface plasmon resonance (SPR) effect of Bi nanoparticles (Bi NPs). Thus, the efficiency of photogenerated carrier separation and transfer is further enhanced, and the catalytic activity is significantly improved. It is impressive that the unique photoanode has achieved a maximum removal efficiency of 85.8% of tetracycline (TC) pollutants under visible light irradiation within 60 min and has excellent stability, which is expected to degrade antibiotics efficiently and environmentally in harsh environments. These characteristics give Bi / Bi 2 S 3 /α-MoO 3 promising candidates for practical applications in antibiotic degradation.
研究领域:
环境科学
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材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Meng Lan,Xiaoli Dong,Nan Zheng,Yubo Zhang
The construction of green and efficient photocatalysts for the treatment of heavy metals in wastewater through simple strategies is still an extremely huge challenge. Herein, SnS/Bi 2 S 3 Z-scheme heterostructure photocatalyst with abundant sulfur vacancies was fabricated by one-pot hydrothermal approach and exploited for the efficient elimination of hexavalent chromium (Cr(VI)). Due to the tight contact interface of the in-situ heterostructures, charge transfer was carried out quickly and photogenerated carrier separation was accelerated. Moreover, the unique charge transmission path of the Z-scheme can efficiently inhibit the reorganization of active carriers. The abundant sulfur vacancies can further improve the photogenerated carrier separation efficiency. SnS/Bi 2 S 3 -2 can achieve effective reduction of Cr(VI) with the efficiency of 91.6 % under 30 min visible light illumination. This study provides a promising photocatalyst for the treatment of chromium hexavalent sewage, and effectively promotes the exploration of one-step construction of heterostructure photocatalyst in the field of water environment remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 7
·075101
·
IF 3.404
Hongying Guo,Xiaoshuang Zhao,Hongmei Sun,Hongda Zhu,Honghao Sun
Development of a safe, efficient and inexpensive multifunctional nanoplatform using a facile approach for multimodal imaging and therapeutic functions becomes more and more practically relevant but challenging. In this work, we demonstrated a novel nanocomposites (Bi2S3-Gd) for computed tomography (CT)/magnetic resonance (MR) imaging-guided photothermal therapy (PTT) for cancer in vitro. It was achieved by modification of hydrophobic Bi2S3 with a smart amphiphilic gadolinium-chelated ligand. The as-prepared nanocomposites composed of low-cost Bi2S3 and gadolinium complexes, showed high stability, excellent biocompatibility and good photostability. It was observed that Bi2S3-Gd nanocomposites can efficiently convert the NIR light into heat, and then suppressed the growth of tumor cells under NIR laser irradiation. Apart from serving as an effective photothermal agent, the as-prepared nanomaterials could induce an efficient contrast enhancement for both CT and MR imaging at low concentrations of Bi and Gd, rendering more accurate diagnosis. This work suggests the potential of Bi2S3-Gd nanomaterials as a novel multifunctional nanoplatform for CT/MR imaging-guided PTT for cancer.
研究领域:
医学影像学
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）