APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Qianxin Zhang,Ping Chen,Meihui Zhuo,Fengliang Wang,Yuehan Su,Tiansheng Chen,Kun Yao,Zongwei Cai,Wenying Lv,Guoguang Liu
In this study, novel carbon dots/BiPO 4 (CDBP) photocatalytic complexes were successfully synthesized via a facile hydrothermal-calcination synthesis strategy. The physicochemical properties of the synthesized samples were studied by X-ray diffraction (XRD), UV–vis diffuse reflectance spectra (DRS), Fourier infrared spectrometer (FT-IR), Raman spectrometer, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), photoluminescence26spectra (PL), electrochemical workstation, etc. The activities of the CDBP were evaluated through the photocatalytic degradation of Indometacin(IDM) in an aqueous solution under simulated sunlight irradiation. With increasing concentrations of carbon dots (CDs), the photocatalytic activity of the CDBP initially increased, and then decreased. A CDs content of 3.0 wt% shows 12 times higher photocatalytic activity than that of pristine BiPO 4 . Reactive oxidative species, particularly O 2 − and h + , were the two critical reactive oxidative species to mediator immediate the photocatalytic degradation of IDM. A notable sign of 5, 5-dimethyl-1-pyrrolidone-N-oxyl(DMPOX) was observed through electron spin resonance spectroscopy(EPR) with CDBP as the photocatalyst, which indicated higher oxidability than pristine BiPO 4 under simulated sunlight irradiation. This enhanced photocatalytic activity might due to high-efficiency charge separation, unique up-converted PL properties, as well as the bandgap narrowing of the CDs. Moreover, the byproducts of IDM were detected by HPLC–MS/MS and GC–MS, and the probable pathways were deduced. The acute toxicity at three trophic levels initially increased slowly and then decreased rapidly as the IDM dechlorination and total organic carbon(TOC) decreased during photocatalytic degradation.
研究领域:
环境科学
·
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10739-10746
·
IF 3.288
Xuecheng Liu,Linjie Yan,Linxin He,Zurun Yao,Linfeng You,Lin Liu,Guilin Zhou,Hongyu Huang
The Co–C3N4/BiPO4 photocatalyst is facilely synthesized for application in photocatalytic water splitting. The physical and chemical properties of Co–C3N4/BiPO4 are studied by a wide range of characterization methods. The Co–CN/BP photocatalyst shows good photocatalytic activity for H2 evolution by water splitting without using a noble metal. The Co–C3N4/BiPO4 composite with 5 wt% Co–C3N4 loading exhibits a superior photocatalytic H2 evolution rate of 23.9 μmol h−1 g−1. The remarkable enhancement of the photocatalytic H2 evolution activity of Co–C3N4/BiPO4 composites is mainly ascribed to the effective charge transfer and separation of the electron–hole pairs by the lattice-matched heterojunction structure. This work extends opportunities for the design of non-noble metal photocatalysts with efficient photocatalytic water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chunyu Yang,Weicheng Huang,Yan Gao,Zhao Liu,Na An,Wei Mu,Qinmin Pan,Bin Yang,Chongshen Guo,Xiaojun Han
Although near-infrared (NIR)-mediated phototherapy has achieved great progresses, mice with subcutaneous tumors are employed by nearly all previous phototherapy studies, which is largely different from the clinical human tumors. A large animal model with orthotopic carcinoma is highly demanded before clinical practice. This work designs a non-stoichiometric photoactive substance of BiPO 4−x for the phototherapy on both of subcutaneous tumor-bearing mice and orthotopic VX2 tumor-bearing rabbit, aiming for perspective clinic prediction. Oxygen defective BiPO 4−x is a brand-new phototherapeutic agent with desirable NIR-harvesting properties, which facilitate production of hyperthermia and reactive oxygen species (ROS), and thus contribute to a synergistic photothermal/photodynamic therapy (PTT/PDT) outcome. The photoabsorption mechanism of BiPO 4−x predicted by density functional theory reveals the emergence of abundant middle band transition as oxygen defect introduction, accounting for a NIR absorption resultantly. The antitumor evaluation on large animal model of rabbits is realized with ultrasound (US) technique and contrast-enhanced ultrasound (CEUS) for deep orthotopic tumor examination. To be excited, the effective elimination of orthotopic rabbit tumors is successfully achieved. Hence, this work advances tumor phototherapy further to the macroanimal model, which makes it to be more clinically relevant.
研究领域:
肿瘤学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiaoya Gao,Guangbei Tang,Wen Peng,Qian Guo,Yongming Luo
Phosphate modification is a general strategy for improving the photocatalytic activities of semiconductors. Ion exchange can be occurred during the phosphate modification process. This would give a surprise for a new phase formed on the surface of the parent photocatalyst. More importantly, this is conductive to form close contact and continuous interface favoring the charge transfer between two phases. Here, a novel BiOCl-OV-BiPO 4 photocatalyst was fabricated using a facile in situ phosphate modification method. BiOCl-OV-BiPO 4 displayed a maximum carbamazepine (CBZ) degradation efficiency of 81.70% after 30 min Xe lamp irradiation, with a reaction kinetics rate constant ( k ) of 5.75 times higher than ordinary BiOCl samples. Oxygen vacancy (OV) is important for the construction of Z-scheme BiOCl-OV-BiPO 4 : OV benefits the generation of BiPO 4 on the surface of BiOCl; furthermore, OV acting as electron mediator, promotes the separation of photogenerated charge carriers between BiOCl and BiPO 4. Based on the results from PL tests, photocurrent density, EIS Nyquist plots, and cyclic voltammetry, it can be demonstrated that Z-scheme structure of BiOCl-OV-BiPO 4 not only increases the photogenerated electrons-holes separation rate but also retains their strong redox ability. This significantly facilitates the production of superoxide radical (O 2 − ) and holes ( h + ), which dominates the CBZ photodegradation. This work provides a new sight for the fabrication of Z-scheme photocatalysts to improve the photocatalytic performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2023
·
IF 4.6
Ruizhen Li,Wanzhen Yuan,Yu Hu,Yonggang Zeng
Propranolol , a widely used β-adrenergic receptor antagonist drug with potential toxic effects to organisms and human beings, was not completely removed from environment through traditional wastewater treatments . It is necessary to sensitively and selectively monitor the trace content propranolol in various samples. In this work, a novel photoelectrochemical (PEC) aptasensor based on Au nanoparticles (NPs) modified g-C 3 N 4 /BiPO 4 heterojunction was successfully fabricated for detecting (S)-propranolol (S-Pro), an important racemic enantiomer of propranolol. Herein, g-C 3 N 4 was employed as visible light-active semiconductor. The photocatalytic activity of g-C 3 N 4 was enhanced via forming heterojunction with BiPO 4 to facilitate the separation and migration of photogenerated carriers . In addition, Au NPs with perfect conductivity and surface plasmon resonance (SPR) effect are not only beneficial to the electron transfer and visible light harvest of g-C 3 N 4 /BiPO 4 heterojunction, but also the crucial factor on assembling S-Pro-binding DNA aptamer via Au-S bonding. At the same time, as a π-π conjugated material, g-C 3 N 4 with large surface area also provides an excellent platform for loading Au NPs. Under the visible light illumination, the PEC aptasensor displayed high PEC performance. On such a sensor, specific captured S-Pro by the aptamer was quickly oxidized by the photogenerated holes to inhibit the recombination of the photogenerated carriers, enhanced the PEC response, and realized the detection of S-Pro. Under optimal conditions, the designed PEC aptasensor exhibited a wide linear range of 10 nM to 1000 nM with a low detection limit (defined as S/N = 3) of 2.55 nM. Moreover, the proposed sensor displayed high selectivity , good reproducibility, and general long-term stability. And the S-Pro in real sample was accurately detected using this proposed sensor.
研究领域:
环境科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Yidi Wang,Bowen Li,Guanshu Li,Yingying Huang,Dawei Fang,Jun Wang,Youtao Song
Three crystal phases of BiPO 4 (HBIP, nMBIP and mMBIP), corresponding photocatalysts (Er 3+ :Y 3 Al 5 O 12 /HBIP, Er 3+ :Y 3 Al 5 O 12 /nMBIP and Er 3+ :Y 3 Al 5 O 12 /mMBIP) and their nanocomposite photocatalyst (Er 3+ :Y 3 Al 5 O 12 /(H-nM-mM)BIP) were prepared by hydrothermal, ultrasonic dispersion and liquid boiling methods. The prepared photocatalysts were characterized by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and UV–vis diffuse reflectance spectra (DRS). The catalytic activity of prepared photocatalysts was evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light, visible-light and simulated solar-light irradiations. These three photocatalysts all exhibited excellent performance under simulated solar-light irradiation and reached 85.36%, 84.42% and 78.53% conversion rates, respectively, for Er 3+ :Y 3 Al 5 O 12 /mMBIP, Er 3+ :Y 3 Al 5 O 12 /nMBIP and Er 3+ :Y 3 Al 5 O 12 /HBIP. Particularly, Er 3+ :Y 3 Al 5 O 12 /(H-nM-mM)BIP was also found to play a high catalytic activity, resulting in 78.68%, 70.04% and 82.57% conversion rates, respectively, under ultraviolet-light, visible-light and simulated solar-light irradiation. In addition, the study of used times showed that the prepared photocatalysts can be effectively recycled without an apparent inactivation on the photocatalytic activity. This research may provide a potential way for converting nitrite and other contaminants by utilizing solar energy efficiently.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Meichao Gao,Dafeng Zhang,Xipeng Pu,Huiyan Ma,Changhua Su,Xin Gao,Jianmin Dou
BiPO 4 /BiOBr photocatalysts were successfully prepared via a facile in situ chemical transformation method. The X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy, photoluminescence and photocurrent measurements were employed to characterize the crystal structures, morphologies, optical properties, and electron-hole separation efficiency of as-synthesized photocatalysts. BiPO 4 /BiOBr composites exhibited much higher photocatalytic activity for the degradation of Rhodamine B than pure BiOBr under visible light irradiation. The significant enhancement of photocatalytic activity could be mainly ascribed to the formation of heterojunction structure of BiPO 4 /BiOBr composite which can effectively improve electron–hole separation during photocatalytic process. Moreover, the effects of Cl − , SO 4 2− , NO 3 − and HCO 3 − anions on the photodegradation performance were investigated, and the as-synthesized BiPO 4 /BiOBr photocatalysts exhibit excellent photo-stability under visible light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 1
·450-459
·
IF 3.049
Zhikai Wei,Peng Li,Muhammad Hassan,Pu Wang,Cong Xu,Long-Fei Ren,Yiliang He
Photovoltaic wastewater contains a large amount of thiourea that cannot be directly treated by biological methods because of its biotoxicity. In this study, a novel O3/H2O2 + BiPO4/UV synergy technique was used as a pre-treatment process to degrade thiourea. The effects of H2O2 and catalyst loading were investigated, and the transformation pathway of thiourea was predicted based on the intermediates detected by UPLC-Vion-IMS-QToF. The synergy technique degraded 89.14% thiourea within only 30 min, and complete degradation occurred after 150 min. The TOC removal of O3/H2O2 + BiPO4/UV was 1.8, 1.5, and 1.9 times that of O3/H2O2 and BiPO4/UV/H2O2 single processes and O3/H2O2 + UV process, respectively, which was due to the synergy between H2O2 residues and BiPO4. In addition, thiourea was mainly degraded by ·OH into thiourea dioxide and melamine (polymerized by other intermediates) and then further degraded into biuret and methyl carbamate by the holes of BiPO4, followed by complete mineralization into H2O and CO2. These results confirm that the O3/H2O2 + BiPO4/UV synergy technique is a promising option for the degradation of thiourea.
研究领域:
环境工程
·
水处理
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 12
·6319-6334
·
IF 3.784
Limin Zhao,Ruifa Jin,Baofeng Zhang
In this paper, a novel Z-scheme photocatalyst Er 3+ :Yb 0.5 Y 2.5 Al 5 N 0.01 F 0.01 O 11.98 /g-C 3 N 4 –Pt–BiPO 4 was synthesized by sol-hydrothermal and calcination methods. The prepared samples were characterized by XRD, SEM, TEM, EDS mappings, XPS, PL, and DRS. In addition, the optimal hydrothermal conditions for the preparation of BiPO 4 were explored with the azofuchsin solution and ciprofloxacin(CIP) solutions as the target pollutants. At the same time, the best calcination temperature and the best calcination time of the Er 3+ :Yb n Y 3−n Al 5 N x F y O 12−x−y and BiPO 4 were investigated. The results showed that the Z-scheme Er 3+ :Yb 0.5 Y 2.5 Al 5 N 0.01 F 0.01 O 11.98 /g-C 3 N 4 –Pt–BiPO 4 photocatalyst has strong redox ability, wide absorption range of visible light, and excellent separation effect of electron–hole pairs, which can efficiently degrade organic pollutants and antibiotic.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Jun-Tao Cao,Jing-Lu Lv,Xiao-Jing Liao,Shu-Hui Ma,Yan-Ming Liu
The photoelectrochemical (PEC) self-powered system has attracted great attention in disease detection. The determination of a simple and efficient approach for disease-related biomarkers is highly interesting and appealing. Herein, an ingenious visible light-induced membraneless self-powered PEC biosensing platform was constructed, integrating a signal amplification strategy for ultrasensitive split-type PEC bioanalysis . The system was comprised of a Bi 2 S 3 /BiPO 4 heterojunction photoanode and a platinum (Pt) cathode in a one compartment chamber. An alkaline phosphatase (ALP)-loaded sandwich immunoassay was used to generate the signal reporter ascorbic acid (AA) in a 96-well plate, and myoglobin (Myo) was used as a model protein. In the presence of AA, ferrocene (Fc), and Tris (2-carboxyethyl) phosphine (TCEP), the chemical-chemical redox cycling scheme was operated upon the initial oxidation of Fc by the holes in the Bi 2 S 3 /BiPO 4 photoelectrode , and Fc was regenerated from Fc + by AA. Subsequently, AA was regenerated by TCEP after its oxidation, and cycling was triggered. As a result, the proposed self-powered PEC sensing exhibited excellent performance with a wide linear range from 5.0 × 10 −13 to 1.0 × 10 −7 g/mL, and a low detection limit of 2.0 × 10 −13 g/mL for Myo. This work provided a new design of a redox cycling strategy in the self-powered PEC biosensor, and showed an effective approach for the clinical diagnosis.
研究领域:
生物传感技术
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Nanomaterials
·
2021
·
IF 2.986
Chunbei Wu,Chuxin Zhou,Yuanyuan Chen,Zhigang Peng,Jun Yang,Yuanming Zhang
A Bi-BiOBr/BiPO4 heterojunction structure was successfully synthesized via a two-step solvothermal method with ethylene glycol as a reducer. Little BiPO4 irregular polyhedrons and little metal Bi spherical nanoparticles were uniformly dispersed on the surface of BiOBr nanosheets with intimate contact and formed a heterojunction structure between BiPO4 and BiOBr. It was found that Bi-BiOBr/BiPO4 had a significant improvement in photocatalytic performance for RhB degradation compared to bare BiOBr and BiPO4. The photocatalytic degradation rate constant of 0.2-Bi/BiOBr/BiPO4 was 1.44 h-1, which was 3.8 times and 14.2 times more than that of bare BiOBr and BiPO4, respectively. This is attributed to the formation of a ternary heterojunction, which benefits the separation of photogenerated electron-hole pairs. Furthermore, with the introduction of metal Bi, the SPR effect of metal Bi can effectively improve the absorption ability of Bi-BiOBr/BiPO4 photocatalyst, resulting in enhanced photoactivity. In this work, the mechanism of photocatalytic degradation was studied by using the photochemical technique and the capture experiment of active species, and it was revealed that h+ and ⋅O2- played a major role in the photocatalytic process.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 11
·29190-29205
·
IF 5.19
Qin Wenli,Chen Zefei,Liu Xueya,Zhang Xinyi,Ai Manqing,Zhang Pingping,Ye Ying,Ma Zengling
Bismuth phosphate (BiPO 4 ), a very attractive candidate for organics electrodegradation, harbors tremendous potential on removing contaminants from water. Here, four carbon microtube electrodes were prepared from corncob, each coated with BiPO 4 by a different method to study the electrodegradation of methylene blue (MB). A thorough insight into the composite features of four electrodes was characterized. Better reversibility and electrocatalytic activity of the fourth electrode (BCC4) prepared by digital signal generator was presented with a current density of 5.71 mA cm −2 at a potential of 1.6 V vs Ag/AgCl. The electrochemical impedances and actual lifetime of BCC4 were 125 Ω and 833 h, respectively. The effectiveness of each kind of BiPO 4 /carbon electrode was preliminarily evaluated by analyzing the actual conversion rate of the MB concentration, which confirms MB electrodegradation by the BiPO 4 /carbon electrode was mainly dominated by the hydroxyl radical oxidation. The mass transfer rate was increased by carbon microtube; thereby, electrocatalysis of BiPO 4 /carbon electrode increased as revealed by an increase in the MB degradation rate. The rate constants k obtained for the degradation of MB by BiPO 4 /carbon electrode at 20 ℃ was 0.0046 mM −1 s −1 , which was 11 times than that of BiPO 4 . The diffusion layer was decreased by carbon microtube, resulting in MB electrodegradation rate increased. The BiPO 4 coated on the surface of the carbon microtube electrodes strengthened their electrocatalytic performance, which shed new light on effective selection of suitable carbon electrode for degradation of organics. Therefore, BiPO 4 /carbon electrode could be potentially applied in the electrodegradation of organic pollutants. Graphical Abstract
研究领域:
环境科学
·
电化学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）