Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Yue Tang,Xiaolin Pi,Huiying Li,Xueni Zhang,Lijun Luo,Fengzhi Jiang
This study presents the synthesis of highly active BiPO 4 /AgI/BC composite photocatalysts via a green, simple, and low-cost ambient temperature precipitation method. The electron transfer rate and visible-light responsiveness can be effectively enhanced by utilizing BiPO 4 compounded with the semiconductor AgI, which has a narrow bandgap and good visible-light responsiveness. Additionally, the introduction of biocarbon (BC) enhances the absorption and separation of photogenerated electrons and holes under visible light. Notably, the synthesized BP-AgI 0.6 -BC 5 % could remove 99.16 % and 99.7 % of EE2 and E2, respectively, at a concentration of 3 mg/L after 40 min of light exposure. The capture experiments and electron paramagnetic resonance spectroscopy reveal that the main active substance in the system is ·O 2 - , with BC playing a crucial role in enhancing the ·O 2 - concentration in the system. The findings from phytotoxicity and antimicrobial tests reveal that BP-AgI 0.6 -BC 5 % can efficiently degrade pollutants, producing degradation products that are substantially less toxic than the original pollutants. Moreover, it can remove more than 99.99 % of E. coli under both dark and light conditions, demonstrating excellent antimicrobial performance. Additionally, the photocatalytic mechanism and degradation pathway were examined in this study. Notably, the composite photocatalysts synthesized in this study achieved efficient degradation of EE2 and E2 under visible light conditions while exhibiting efficient bactericidal function. Furthermore, the room-temperature preparation method is conducive to industrial-scale production, highlighting a better prospect for practical applications.
研究领域:
环境科学
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材料科学
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生物学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Ning Liu,Na Lu,HongTao Yu,Shuo Chen,Xie Quan
In recent years, the excellent performance of sulfate radical (SO 4 · − ) in advanced oxidation process has attracted more and more attention. However, it requires the consumption of expensive persulphate (PMS/PDS), and the resulting sulfate ion (SO 4 2− ) requires subsequent processing procedures, which limits its practical application value. In this work, a Z-scheme heterojunction g-C 3 N 4 /BiPO 4 (CNB x ) photocatalyst was constructed to in-situ activate the residual SO 4 2− , H 2 O and dissolved O 2 in organic wastewater simultaneously and produce SO 4 · − , ·OH and O 2 · − efficiently, so as to realize enhanced organic pollutant treatment by using clean and renewable solar energy resources. Under the condition of 10 mM SO 4 2− addition and 100 mW·cm −1 illumination, the degradation rate of BPA ( C 0 = 20 mg·L −1 ) by optimized CNB 150 catalyst was 0.30 min −1 , which was 50% higher than that without SO 4 2− (0.20 min −1 ). Detailed characterizations shown that a direct Z-scheme heterojunction was formed between g-C 3 N 4 and BiPO 4 , which could be simultaneously stimulated by light, and then effective charge separation and migration could be achieved through the internal electric field caused by the Fermi-level difference between the g-C 3 N 4 (-0.12 eV) and BiPO 4 (0.01 eV). In general, this study makes full use of renewable solar energy and provides a feasible path for promoting the simultaneous in-situ utilization of small molecules (SO 4 2− , H 2 O and O 2 ) that originally exist in water, which makes organic wastewater treatment more economic, eco-friendly and sustainable.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2020
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IF 3.442
Dafeng Zhang,Changhua Su,Shujuan Yao,Hong Li,Xipeng Pu,Yanling Geng
BiPO 4 /BiOCl p-n heterojunction photocatalysts were successfully prepared by a facile in situ chemical transformation method with the aim of degrading rhodamine B under simulated sunlight. X-ray diffraction, field emission scanning electron microscopy , ultraviolet–visible diffuse reflectance spectroscopy , photoluminescence , and electrochemistry tests were used to characterized the structure, morphology, optical properties , and inhibited recombination of photoinduced charges. BiPO 4 /BiOCl composites exhibited significantly higher photocatalytic activity for the degradation of rhodamine B than pure BiOCl, and the apparent rate constant is 3.18 times higher than that of BiOCl. The significantly increased photocatalytic activity of the BiPO 4 /BiOCl composites can be ascribed to the formation of a p-n heterojunction , which can effectively boost the separation of photoinduced electron-hole pairs during the photocatalytic process. Additionally, the main active species were investigated and a plausible mechanism is proposed.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Zhongyi Zhang,Junjie Ma,Edwin Hena Dawolo,Bingfa Chen,Ning Ding,Hong Liu
In order to effectively degrade tetracycline (TC), a novel B i PO 4 / B i 2 F e 4 O 9 photocatalytic composite was created in this study. When compared to several bismuth-based photocatalytic materials, the system demonstrated excellent degradation activity. PMS is activated under visible light irradiation. System B i PO 4 / B i 2 F e 4 O 9 /PMS/Vis removes 89.3% of TC in 60 minutes. Based on the energy band structures of B i 2 F e 4 O 9 and B i PO 4 , the catalytic efficiency of the composites could be explained by type Z heterojunction mechanism. Superoxide radicals and holes are the primary causes of TC degradation, as shown by experiments using electron paramagnetic resonance and free radical entrapment. In addition, the system B i PO 4 / B i 2 F e 4 O 9 /PMS/Vis maintained its high degradation capacity and pristine composition after multiple recycling. The reaction system's TC degradation was not considerably impacted by pH, anions, or ionic strength. The TC degradation intermediates demonstrated a noteworthy decrease in toxicity within the BPFO-10/PMS/Vis system, hence guaranteeing the intermediates' safe conversion. These findings highlight the significant potential of the novel bismuth-based photocatalytic composite for degrading emerging pollutants in wastewater.
研究领域:
环境科学
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材料科学
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光催化技术
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Yuting Li,Jiaming Song,Xin Zhao,Bingda Li,Zhuo Wang,Juanjuan Yang,Guoshuai Ban,Feng Teng,Jialong Ma,Chaoying Meng,Honggang Ye,Guangde Chen,Zhonghua Dai,Yu Cong
With increasing environmental pollution, the utilization of green techniques, such as photocatalysis, is required to degrade harmful sources without secondary pollution. In this study, we synthesized an efficient photocatalyst, i.e., a h-BN/BiPO4 heterostructure modified by Ag nanoparticles at the interface (Ag/BN/BPO) by photodeposition and a hydrothermal method, and investigated photocatalytic degradation performance for rhodamine B dye (RhB). It was found that 95% of RhB was removed by Ag/BN/BPO (optimal ratio) after 60 min of light exposure. Compared to BiPO4 and BN/BiPO4, the removal efficiency was improved by 50 and 30%, respectively. The high photocatalytic degradation activity of Ag/BN/BPO could be possibly attributed to the synergistic effect of the improved separation efficiency of electron–hole pairs by the special heterostructure design and the increased adsorption capacity due to the large specific surface area of the layered h-BN. This study provided a possible route for the development of highly efficient photocatalysts for the degradation of organic pollutants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 15
·12638-12648
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IF 2.22
Zhou Xiaohong,Chen Yongyang,Wang Peiying,Xu Chengyang,Yan Qishe
The AgI/BiPO 4 n–n heterojunction hybrids were favorably fabricated over amorphous particles AgI closely in contact with petty polyhedron-assembled star-like BiPO 4 by precipitation technology for the first time. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis diffuse reflectance spectra (DRS), electrochemical test, etc. The degradation of tetracycline hydrochloride (TC) and methylene blue (MB) was employed to testify the performance of as-prepared composites upon exposure of simulated solar light and the AB-X composites exhibited boosted degradation efficiency in comparison with the as-prepared pure BiPO 4 and AgI. For instance, the calculated k TC of pseudo-first-order kinetics model on 24 wt% AgI/BiPO 4 sample was 36 times relative to those on pure BiPO 4 . This enhanced activity might due to increased charge transfer and separation efficiency in the formed n–n heterojunction and the dominant reaction active species were authenticated by trapping experiments. Furthermore, the internal electric field in the AgI/BiPO 4 heterojunction and the transfer path of electron–holes were tentatively deduced through graphical elucidation.
研究领域:
材料科学
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环境化学
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光催化
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纳米材料
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半导体异质结
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污染物降解
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能源与环境技术
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
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2023
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IF 3.7
Qirui Zhang,Xiushuai Guan,Xiaokun Wang,Xiaochao Zhang,Changming Zhang,Jinbo Xue,Caimei Fan
The construction of heterojunction structure is an effective strategy for solving photogenerated electron-hole recombination. In this work, a kind of 1D/2D S-scheme BiPO 4 /BiOBr heterojunction film is designed and constructed by in-situ electrochemical-ion-exchange method on Bi plate. The S-scheme transfer path of photogenerated electrons of BiPO 4 /BiOBr film is collaboratively confirmed through DFT calculation and in-situ X-ray photoelectron spectra. As-prepared S-scheme BiPO 4 /BiOBr heterojunction film has the higher CO 2 photoreduction activity (296.5 μmol·g −1 ) to CO, 1.9 times than pure BiOBr film, which should be mainly attributed to improved light utilization efficiency and effective separation/migration of photogenerated electron-hole pairs.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Yilin Wang,Qian Fu,Jia Chen,Yueli Lin,Yaqi Yang,Chenxi Wang,Yixi Xie,Pengcheng Zhao,Junjie Fei
Catechol is a phenolic environmental pollutant that is highly toxic to living organisms and is released into the environment, where it is difficult to degrade in the ecosystem, thereby contaminating the environment and groundwater. Here, P(NIPAM-co-BMA)/BiPO 4 /BiOCl/MWCNTs nanocomposites were synthesized, and a temperature-controlled "on/off" electrochemical sensor was constructed. In addition, the P(NIPAM-co-BMA)/BiPO 4 /BiOCl/MWCNTs/GCE sensor shows good thermal sensitivity and electrochemical detection of catechol. Reproducible "on/off" switching on the CVs curve can be achieved by controlling the temperature of the solution. Under optimal conditions, the sensor was able to detect catechol in the linear range of 0.5–86.51 μM with a limit of detection of 0.2 μM (S/N = 3). Satisfactory results were obtained for the detection of natural environmental samples (tap water). In addition, the redox mechanism and electrochemical reaction sites of catechol were investigated by scanning rates. This work demonstrates for the first time the combination of temperature-sensitive polymers, bismuth-based compounds and multi-walled carbon nanotubes as electrochemical sensors for the detection of catechol, opening a new window for the sensitive detection of catechol. At the same time, the constructed switch-like electrochemical sensors can be better applied to different special scenarios.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2022
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IF 3.841
Ruizhen Li,Yu Hu,Lijun Du,Jiawen Li,Jigang Yuan,Xingyong Liu
In recent years, advanced oxidation processes (AOP) based on sulfate free radicals (SO 4 − ·) have attracted considerable attention due to the excellent advantages of SO 4 − · compared with hydroxyl radical (·OH). However, SO 4 − · generally produced by activating extra persulphates, which causes high cost and risk of secondary pollution. In this work, BiPO 4 modified carbon paper electrode (BiPO 4 /CP) successfully fabricated via simple method can be used as a photocatalyst to effectively activate sulfate originally existed in wastewater to generated sulfate radicals in-situ without adding any extrinsic chemical oxidants. Pefloxacin (PFX) was degraded effectively on BiPO 4 /CP with the help of applied potential. CP with large surface area and high electrical conductivity as an excellent support for BiPO 4 is beneficial to improve the reutilization, electron transfer and photocatalytic performance of BiPO 4 . Moreover, BiPO 4 with large bandgap has sufficient redox capacity to produce not only ·OH, superoxide radical (·O 2 − ), but also SO 4 − ·, which is crucial for photocatalytic pollutant degradation. Detailed characterizations give strong evidences of the successful fabrication of photocatalyst, thermodynamic feasibility of SO 4 − · in-situ formation, the generation of free radicals, and the possible mechanism. Consequently, under the optimal conditions (pH=5.6, +1.0 V (vs.SCE), [SO 4 2− ]=10 mM, 61 μW cm −2 UV light irradiation, 33 mg BiPO 4 loaded on CP), the degradation efficiency of PFX (10 mg/L) was 87.8% in 120 min, which was 5.1 ad 8.2 times higher than that in photocatalytic and electrocatalytic system and 3.3 times higher than that without SO 4 2− . Meanwhile, BiPO 4 /CP maintains high level of degradation efficiency of PFX after 6 cycles under the optimal conditions.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2022
·Vol. 24
·期 37
·22987-22997
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IF 3.945
Long Shi,Juanqin Xue,Wen Xiao,Peng Wang,Mingyang Long,Qiang Bi
The coal chemical industry generates large amounts of solid waste and volatile organic compounds (VOCs). In this study, the solid waste semi-coke powder obtained in the semi-coke production process was used as a raw material to prepare high-specific surface area semi-coke activated carbon (SAC) by a carbonization and activation process, and a ternary z-scheme heterojunction photocatalyst with high catalytic performance was loaded for synergistic treatment by adsorption and photodegradation to achieve waste treatment with waste. The prepared semi-coke activated carbon has a specific surface area of 619.27 m2 g−1, which can achieve effective adsorption of VOCs. The ternary z-scheme heterojunction photocatalyst BiPO4–BiVO4–g-C3N4 (PVCN) was supported on a semi-coke activated carbon substrate by a one-step sol–gel method. Based on the synergistic effect of adsorption and photocatalysis, the obtained PVCN/SAC material can degrade toluene by 85.6% within 130 minutes under simulated sunlight irradiation, which is 2.43 times that of pure photocatalyst. The rate of degrading toluene can be increased by 4.43 times. Capture experiments showed that superoxide radicals (˙O2−) and hydroxyl radicals (˙OH) were the key active species in the degradation pathway. Even after five cycles, the material maintained 81.6% of the degradation performance. In this work, we deeply investigate the mechanism of semi-coke activated carbon as a matrix for enhancing photocatalytic degradation performance. The findings of this work provide new insights into the efficient degradation of VOCs and provide a good theoretical basis for the development of high-performance photocatalysts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Yidi Wang,Bowen Li,Guanshu Li,Xue Ma,Hongbo Zhang,Yingying Huang,Guowei Wang,Jun Wang,Youtao Song
Z-scheme structure is an effectively construction to improve the photocatalytic activity due to the excellent photo-generated electron-hole pairs separation efficiency. In this paper, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO), (Au/rGO)/CdS and modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS photocatalysts were prepared by hydrothermal, ultrasonic dispersion, deposition-precipitation and ultrasonic-assisted methods. The prepared samples were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectra (DRS), fourier transform infrared spectra (FT-IR), raman spectra and photoluminescence (PL) spectra. The photocatalytic activity of prepared samples were evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light and simulated solar-light irradiations. Due to the enhanced separation efficiency of electron-hole pairs, the Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS exhibited excellent performance under both ultraviolet-light and simulated solar-light irradiation, reaching 94.59% and 91.25% conversion rates, respectively. Meanwhile, the effects of simulated solar-light irradiation time and corresponding reaction kinetics on photocatalytic conversion of nitrite were studied. Subsequently, the effects of electron and hole scavengers were investigated to further elaborate the possible mechanism. In addition, the study of used times showed that the prepared modified Z-scheme Er 3+ :YAlO 3 @(PdS/BiPO 4 )/(Au/rGO)/CdS nanocomposites can be effectively recycled without an apparent inactivation on photocatalytic activity. This research may provide a potential way by utilizing solar energy efficiently for converting nitrite and other contaminants released into the environment.
研究领域:
材料科学
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环境科学
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化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
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IF 10.7
Jiaying Zhang,Fan Fan,Wei Zhu,Wenqing Yao,Fupeng Zhao,Zhuang Yang,Cong Wang,Yajun Wang
The low regeneration rate of Co(II) is a major obstacle to the efficient activation of peroxymonosulfate (PMS) by Co in advanced oxidation technology. Herein, a Co(II)/oxygen-defect monoclinic monazite BiPO4 (Co(II)/BiPO4−x) photocatalyst was prepared. The degradation efficiency of tetracycline hydrochloride (TCH) and polyethylene terephthalate (PET) in the 25%Co(II)/BiPO4−x/PMS/UV system is up to 99.0% (within 30 min) and 40.4%, which was 1.9 and 6.5 times that of the BiPO4/PMS/UV system, respectively. The loading of Co(II) increases the oxygen defect concentration of BiPO4−x, therefore more photogenerated electrons can involve in the Co cycling to promote PMS activation. Meanwhile, simultaneous illumination X-ray photoelectron spectroscopy (SI-XPS) indicates that the electrons are transferred from BiPO4−x to Co, accelerating the regeneration rate of Co(II). DFT calculation reveals that 25%Co(II)/BiPO4−x exhibits much lower reaction energy barrier. This novel work demonstrates a new perspective to modulate the free radical and nonradical dual-pathway for treating refractory contaminants through defect engineering.
研究领域:
环境科学
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材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）