APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Yan Zhang,Xinhui Huang,Yaxue Zhang,Letian Lv,Chengyuan Su,Shu Gao,Zhi Huang,Menglin Chen,Xianfeng Lin
We prepare CdS-CeO 2 /sepiolite materials in a one-step process and characterize their structural, morphological, and optical properties. CdS-CeO 2 /sepiolite displays enhanced adsorption of the environmentally hazardous dye Rhodamine B (RhB), up to 34.92 mg/g. Harnessing synergy between adsorption and photocatalysis, CdS-CeO 2 /sepiolite removes 98.57 % of RhB from solution after 150 min of visible light illumination and is robust to a wide pH range. Quenching experiments and electron spin resonance (ESR) indicates that singlet oxygen and holes are the main reactive groups during photocatalytic degradation. CdS and CeO 2 hinder the recombination of photogenerated electron-hole pairs, accelerate charge transfer, and enhance visible light absorption. These CdS-CeO 2 /sepiolite materials have potential application in the efficient photodegradation of dye in a wide range of pH.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2021
·
IF 4.051
Hailin Tian,Yan Gu,Houle Zhou,Yingping Huang,Yanfen Fang,Ruiping Li,Changcun Tang
In this work, bismuth bromideoxide (BiOBr), a typical visible-light photocatalyst , was coated with Zr-based MOFs (UiO-66) to prepare the BiOBr@UiO-66 photocatalysts with different mole ratios by the solvothermal method. The core–shell BiOBr@UiO-66 photocatalysts with abundant activated sites was obtained due to the modification of UiO-66 on the surface of BiOBr. The structure and properties of the BiOBr@UiO-66 photocatalysts were characterized by several methods. The 30% BiOBr@UiO-66 photocatalysts exhibited the biggest photodegradation rate constant (k = 0.0669 min −1 ) for RhB under visible-light irradiation than pure BiOBr (k = 0.0281 min −1 ) and UiO-66 (k = 0.0041 min −1 ). Additionally, the 30% BiOBr@UiO-66 photocatalysts exhibited the enhanced photocatalytic activity and stable recyclability due to the effective electron-hole separation and synergistic effect. The photocatalytic mechanism of the BiOBr@UiO-66 photocatalysts for RhB, which contained a photosensitization process, was discussed with the trapping experiment of active species and the proposed energy band alignments.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2015
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IF 3.091
Meichao Gao,Dafeng Zhang,Xipeng Pu,Hong Li,Dongdong Lv,Bingbing Zhang,Xin Shao
Bi/BiOBr photocatalysts with improved photodegradation performances were synthesized by a facile one-step hydrothermal method using ethanol–water mixed solution. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, UV–vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. The addition of ethanol results in the partial reduction of Bi 3+ ions to metallic Bi, different morphology from pure BiOBr , and the formation of oxygen vacancies. The dosage of ethanol plays a vital role in the morphologies and photodegradation performances of as-obtained Bi/BiOBr. The Bi/BiOBr photocatalysts show improved photodegradation performances, which is attributed to the high surface area, narrow band gap, and inhibited recombination of electron–hole pairs .
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OPTICAL MATERIALS
·
2022
·
IF 3.754
Zhengdong Zhang,Xingyu Chen,Shanhua Chen,Qi Dong,Xinyi Zhang,Ao Jiang,Dafu Zhang,Yuli Di,Taishan Li
A Z-scheme TiO 2 /g-C 3 N 4 heterostructure system was used to activate peroxymonosulfate (PMS) for the photocatalytic degradation of Rhodamine B (RhB). The Z-scheme TiO 2 /g-C 3 N 4 heterojunction photocatalysts were successfully synthesized by using a simple impregnation method. The structure and surface morphology of the samples were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), X-Ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The optical and electrochemical properties were characterized by UV–vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) electrochemical impedance spectroscopy (EIS).The results indicated that the Z-scheme heterojunction between TiO 2 and g-C 3 N 4 was successful established and the optimal photocatalytic activity was achieved when the mass ratio of TiO 2 to g-C 3 N 4 is 10:1. The degradation rate of RhB (20 mg/L, 50 mL) was 82.79% within 120 min simulated sunlight irradiation. After adding PMS to 10% TiO 2 /g-C 3 N 4 heterojunction photocatalysts , the reaction rate constant (k) of the TiO 2 /g-C 3 N 4 -PMS system is about 11.39 times as large as that with 10% TiO 2 /g-C 3 N 4 system. Moreover, the free radical trapping experiments results demonstrated that h + and SO 4 − · were the main active species in the TiO 2 /g-C 3 N 4 -PMS system.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 27
·13010-13020
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IF 3.925
Jianke Tang,Yanfeng Xue,Chunlei Ma,Shengjian Zhang,Qiaoling Li
The construction of p–n heterojunctions instead of p-type or n-type semiconductors can improve the separation efficiency of photoinduced electrons and holes. In this work, BiOI/tetrapod-like ZnO whisker (T-ZnOw) p–n heterojunction photocatalysts with different Bi/Zn molar ratios were prepared by the in situ precipitation of BiOI on a T-ZnOw substrate. The BiOI/T-ZnOw photocatalysts efficiently degraded rhodamine B (RhB) and oxytetracycline (OTC) under visible light irradiation. The photocatalyst with a Bi/Zn molar ratio of 1 : 10 (BZ-10) exhibited the highest photocatalytic activity, with 97.1% and 88.0% removal of RhB and OTC, respectively. After degradation cycling experiments, the OTC removal efficiency was still 80.7%. The photocatalytic activity of the BZ-10 composite was improved compared to those of pure T-ZnOw and BiOI. This was attributed to the large specific surface area and the efficient separation of charge carriers caused by the formation of p–n heterojunctions between BiOI and T-ZnOw. The photodegradation mechanism was put forward based on radical trapping experiments and electron spin resonance (ESR) results. The synthesized BiOI/T-ZnOw heterojunction composite could be a promising photocatalyst in environmental photocatalysis.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2020
·
IF 3.085
Junnan Qu,Yi Du,Yibing Feng,Jianyong Wang,Bo He,Minxing Du,Yang Liu,Nan Jiang
A visible-light-responsive hybrid photocatalyst , K-doped g-C 3 N 4 /BiOBr, has been synthesized by K-doped g-C 3 N 4 (K–CN) and BiOBr. The property of photocatalysts was characterized by XRD , FT-IR, TEM, SEM , DRS , PL , EIS and HPLC. The photocatalytic activity of K-doped g-C 3 N 4 /BiOBr was evaluated by degradation of Rhodamine B (RhB) and tetracycline hydrochloride under visible-light irradiation. The K-doped g-C 3 N 4 /BiOBr hybrid photocatalyst which contains K–CN with mass fraction of 20% (20K–CN/BiOBr) shows the best degradation efficiency of RhB. The degradation efficiency of RhB (20 mg/L) can be achieved to 99% and the degradation efficiency of tetracycline hydrochloride by BiOBr decreased with the increase of K-doped g-C 3 N 4 doping. The results of photocurrent and EIS assumed that the tight coupling between K–CN and BiOBr can enhance the separating efficiency of photo-generated carrier. In addition, the capture experiment proof that h + is the primary active substance in the system of reaction and ·OH is the auxiliary active substance. After five degradation experiments, the efficiency of the degradation of Rhodamine B by the sample can still reach 90%, which proves that the samples are stable. A new and efficient method is provided in this work to solve the pollution of organic dyes and antibiotics.
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ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Lin Hu,Dong Mao,Liu-han Yang,Ming-sheng Zhu,Zheng-hao Fei,Shi-xin Sun,Dong Fang
Enhancing photocatalytic performance via electronic modulation have attracted much attention for synergetic photocatalytic degradation of antibiotic pollutant. In this study, a new hetero-structured system is raised, which comprises In 2 S 3 coupled to In-MOF and operates as an efficient photocatalyst for RhB degradation. The formation of hetero-structure and occurred electron modulation of In 2 S 3 /In-MOF hybrid was confirmed by relevant characterizations. Surprisingly, the In 2 S 3 /In-MOF hybrid represented enhanced photocatalytic ability over In-MOF. The photocatalysis of Rhodamine B in presence of In 2 S 3 /In-MOF hybrid has achieved 92.2 % degradation.
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PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Yiqing Liu,Hong Hu,Ting Wang,Chuanzeng Chen,Linghan Xu
Usually, Cu(II) cannot effectively activate peracetic acid (PAA), but it was observed that the high concentration of Cl - in Cu(II)/PAA process could notably promote the decoloration of rhodamine B (RhB) in the preliminary experiment. Therefore, the mechanism on the enhanced effect of Cl - in Cu(II)/PAA process for RhB decoloration was investigated in detail in this work. With the addition of Cl - in Cu(II)/PAA process, it could rapidly combine with Cu(II) to produce highly active Cu(II)-Cl n complexes, which could promote the Cu(II) reduction to Cu(I) and subsequent PAA activation. At pH 8.5, the RhB decoloration efficiency in Cl - /Cu(II)/PAA process could reach 85.8 %, and CH 3 C(O)OO • and CH 3 C(O)O • mainly contributed to the decoloration of RhB in this condition. However, at pH 4.0, reactive chlorine species were considered to be responsible for RhB decoloration in this process. The increase of Cu(II), PAA and Cl - dosage facilitated the RhB decoloration in Cl - /Cu(II)/PAA process, while the excessive Cl - inhibited RhB decoloration. HCO 3 - showed an apparent improvement effect on RhB decoloration, while fulvic acid (FA) obviously suppressed RhB decoloration. This work provides a deep insight on the facilitation effect of Cl - in Cu(II)/PAA process and a strategy to broaden PAA catalysis via Cu(II).
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DOI
PubMed
高影响因子
Reaction Chemistry & Engineering
·
2024
·Vol. 9
·期 6
·1521-1531
·
IF 3.4
Yuxing Sun,Zilong Zhang,Juan Yang,Xiang Wang,Huanjun Peng,Jingdong Peng
Generally, a Bi-doped TiO2 nanocomposite was synthesized by a microwave-assisted hydrothermal method to introduce Bi4Ti3O12 and an oxygen vacancy onto the pristine TiO2. The optimized composite 6Bi–TiO2 exhibits a good photocatalytic ability for degradation of rhodamine B (RhB), and the calculated reaction rate constant is about 13.7 times higher than that of pristine TiO2. After 60 minutes of light irradiation, the 6Bi–TiO2 sample achieved a degradation rate of 95% and that of the pristine TiO2 was 21%. Furthermore, the catalyst retains a good photocatalytic ability after recycling five times. The enhanced photocatalytic ability can be credited to the improved charge separation efficiency, caused by the altered band structure after the anchoring of Bi4Ti3O12, and the oxygen vacancy also plays a crucial role in the degradation process. This study offers insights into the application of a microwave-assisted hydrothermal method in the effective synthesis of Bi4Ti3O12 on TiO2 by a Bi-doping strategy.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 13
·8311-8320
·
IF 2.599
Qu Lu-Lu,Wang Na,Li Yan-Yan,Bao Dan-Dan,Yang Guo-Hai,Li Hai-Tao
A novel ternary nanocomposite consisting of activated carbon (AC) and titanium dioxide (TiO 2 ) decoration in the presence of reduced graphene oxide (TiO 2 –rGO–AC) was fabricated by a facile hydrothermal synthesis method for use as a high-performance photocatalyst. The as-prepared TiO 2 –rGO–AC nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and UV–Vis diffuse reflectance spectroscopy. The results demonstrated that the TiO 2 and activated carbon were well dispersed on the rGO surface. The photocatalytic performance of the TiO 2 –rGO–AC nanocomposite was evaluated as a catalyst for the photodegradation of rhodamine B. The degradation rate was 3.4 times higher than that of pure TiO 2 under simulated solar light irradiation. The enhancement of photocatalytic performance is attributed to the adsorption of AC which significantly increased the organic molecule concentration near the catalytic surface, allowing the effective transfer and separation of photogenerated electrons. TiO 2 –rGO–AC photocatalyst is also effective for the degradation of tetracycline in aqueous solution, suggesting wide application of these nanocomposite materials in various fields including air purification and wastewater treatment.
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高影响因子
POLYHEDRON
·
2026
·
IF 2.8
Innocent Tayari Mwizerwa,Jiayi Tang,Tianlei Huang,Li Zelong,Zhuyu Sun,Xiaoxiang Zhao
Graphitic carbon nitride photocatalytic efficiency is hindered by limited active sites and fast electron-hole recombination. A facile two-step calcination strategy was used to fabricate iron and nickel co-doped g-C 3 N 4 (Fe/Ni-g-C 3 N 4 ) for enhanced photocatalytic degradation of Rhodamine B (RhB) under visible light irradiation. This increased specific surface area (11.2 m 2 /g for Fe 3 /Ni 1 -g-C 3 N 4 compared to 10.3 m 2 /g for pure g-C 3 N 4 ), improved visible light harvesting, and triggered a prolonged charge carrier lifetime. The Fe 3 /Ni 1 -g-C 3 N 4 catalyst showed superior performance, with a kinetic rate constant of 0.04481 min −1 , which is three times greater than that of its other counterpart photocatalysts. It also exhibited excellent stability, degrading over 90% of RhB for three consecutive cycles. Meanwhile, mechanistic study of radical quenching tests and DFT calculations showed degradation via h + radicals, initiating deethylation and hydroxylation reactions that mineralized RhB into CO 2 and H 2 O. Finally, this report provides the synergy of Fe/Ni and an avenue for efficient and stable metal-doped graphitic carbon nitride photocatalysts.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Shaobo Li,Yuejie Li,Ran Chen,Ying Li,Ming Hua,Li Li,Jing Liu
A cobalt oxide-decorated hollow carbon nitride ( g -C 3 N 4 ) photocatalyst was synthesized and evaluated for the degradation of Rhodamine B (RhB) under ultraviolet (UV) irradiation, with particular attention to removal efficiency, matrix tolerance, and stability. Characterization showed that cobalt oxide species were finely dispersed on the g -C 3 N 4 framework, and the modified composite exhibited a narrower band gap and suppressed charge-carrier recombination relative to pristine g -C 3 N 4 . X-ray photoelectron spectroscopy further suggested interfacial Co-N/Co-O interaction and mixed cobalt valence states. The optimized catalyst achieved more than 95% RhB removal within 30 min under the selected conditions. It retained activity in the presence of common coexisting ions, maintained over 80% degradation efficiency after five reuse cycles, and remained effective after 28 days of storage. Effective degradation was also observed in lake water and paper mill effluent, and methyl violet was removed in these complex matrices, indicating the applicability of the catalyst to dye-containing wastewater. Mechanistic studies showed that •O₂ − and •OH were the dominant reactive species. Density functional theory and high-performance liquid chromatography coupled with quadrupole-time-of-flight tandem mass spectrometry (HPLC-Q-TOF-MS/MS) were further combined to identify preferential radical attack sites and elucidate the major transformation pathways of RhB. The degradation proceeded mainly through sequential de-ethylation, chromophore cleavage, and ring-opening reactions, ultimately yielding low-molecular-weight aromatic acids, including benzoic acid and o-phthalic acid. Toxicity estimation using the Toxicity Estimation Software Tool (T.E.S.T) model suggested that the final products were associated with lower ecological risk than the parent dye. These results indicate that cobalt oxide modification enhances the photocatalytic performance of g -C 3 N 4 for dye-containing wastewater treatment.
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