RSC Advances
·
2025
·Vol. 15
·期 16
·12629-12644
·
IF 4.6
Yinqi Yang,Guoshuai Ma,Xiaoli Hu,Wei Wang,Zhonglin Du,Yao Wang,Xue-zhong Gong,Haoyu Tan,Fengxiang Guo,Jianguo Tang
In the context of sustainable development, the utilization of semiconductor materials for the degradation of dyes, antibiotics, heavy metals, and pesticides in wastewater under visible light has emerged as a focal point of contemporary research. In this investigation, a WO3@TiO2 composite was synthesized via a solvothermal method, with the composite exhibiting a molar ratio of 5% WO3 to TiO2 precursors demonstrating optimal photocatalytic degradation performance. This material achieved complete degradation of 20 mg per L Rhodamine B (RhB) dye and tetracycline (TC) antibiotic within 30 min. Furthermore, the effects of initial pollutant concentration and solution pH on catalytic efficacy were systematically explored. The findings revealed that at RhB concentrations below 40 mg L−1, the degradation proceeded at an accelerated rate, with a rate constant exceeding 0.128 min−1. The catalyst exhibited robust performance across a broad pH range, attaining peak degradation efficiency at pH ≈ 3. The exceptional photocatalytic prowess of the WO3@TiO2 composite is predominantly attributable to its distinctive hollow microstructure, the intimate interfacial synergy between WO3 and TiO2, and the efficient separation of photogenerated electrons and holes facilitated by the type-II heterojunction architecture.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Chengqun Xu,Honghai Wu,Feng Long Gu
BiOBr/Na–montmorillonite composites (BiOBr–Mt) were prepared under laboratory ambient conditions by using the surfactant cetyltrimethylammonium bromide (CTAB) as the Br source and template, and the as-synthesized samples were characterized by XRD, FT-IR, FESEM, TEM equipped with EDS, BET and UV–vis DRS techniques. Interestingly, the particle size of BiOBr can be controlled by CTAB modified Na-montmorillonite. The photocatalytic activity of the as-prepared was further evaluated by decomposition of Rhodamine B (RhB) under visible light irradiation; the obtained results revealed that the BiOBr–Mt sample had strong photoabsorption in the visible light region. It has higher photocatalytic activity than pure BiOBr alone. There exists an efficient adsorption for RhB onto BiOBr–Mt contrast to that onto the pure BiOBr. The adsorption processes can be well described by pseudo-second-order kinetic model; meanwhile, the adsorption behaviors can be described by both Freundlich and Langmuir equations but the former was better. Additionally, the relevant adsorption and degradation mechanisms were explored and the possible mechanisms were presented. The photocatalytic activity has high effect both in acidic and basic conditions on the degradation reaction but in acidic condition is more favorable. After three recycles, BiOBr–Mt did not exhibit any significant loss of photocatalytic activity, confirming the photocatalyst was essentially stable.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2015
·Vol. 33
·期 10
·1470-1476
·
IF 1.835
Zu Xi-hong,Jian Zhi-hui,Yi Guo-bin,Huang Hai-liang,Zhong Ben-bin,Luo Hong-sheng,Huang Jia-rong,Wang Cui
In this study, well-ordered gold nanoparticle array on silicon substrate was adopted as an active surface-enhanced Raman scattering substrate for detecting rhodamine B (RB), and the influence of RB morphologies on surface-enhanced Raman scattering (SERS) properties was discussed. The Au nanoparticle array was prepared by using patterned P4VP nanodomains of poly(styrene- b -4-vinylpyridine) (PS- b -P4VP) diblock copolymer thin films as nanoreactors which is a simple and economical approach. The results show that Raman spectra of RB on the Au nanopaticle array have much stronger intensity than those on the bare silicon substrate by detecting same RB solution. It indicates that the prepared Au nanoparticle array on silicon substrate has a significant Raman enhancement for RB. Interestingly, the Raman intensity of RB from its ethanol solution is much stronger than that from its aqueous solution due to the special morphologies of RB formed in their ethanol solutions. This work provides an effective approach to prepare highly sensitive and stable surface-enhanced Raman scattering substrate.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 14
·21632-21645
·
IF 0
He Yuanzhen,Zhong Dengjie,Xu Yunlan,Zhang Jiayou,Jiang Ran,Liao Pengfei
In this paper, La-doped Ti/SnO 2 -Sb 2 O 4 electrode was prepared by electrodeposition and used for electrochemical degradation of rhodamine B. The optimum preparation conditions of the electrode were optimized as deposition time of 15 min and calcination at 500 ℃ for 2 h. The water treatment conditions were selected as initial pH 3.0, electrolyte Na 2 SO 4 concentration 0.1 M, current density 30 mA cm −2 , and initial rhodamine B concentration 20 mg L −1 ; the color and TOC removal of RhB reached 99.78% and 82.41% within 30 min. The FESEM, XRD, XPS, CV, LSV, and EIS characterization studies demonstrated that Ti/SnO 2 -Sb 2 O 4 -1%La electrode had a dense structure and the highest oxygen evolution potential (2.14 V) and lowest charge transfer resistance (0.198 Ω cm −2 ), indicating that doped La has lower energy consumption. Moreover, La doping can expand the specific surface area, active site, performance of pollutant degradation, and service life of the electrode. Especially, the service life of Ti/SnO 2 -Sb 2 O 4 -1%La is increased by three times, and the maximum life span reaches 90 min (1000 mA cm −2 , 1 M H 2 SO 4 ). Free radical quenching experiments show that ·OH plays a major role in the degradation of RhB. The Ti/SnO 2 -Sb 2 O 4 -1%La electrode prepared in this paper and its results will provide data support and reference for the design of efficient electrocatalytic electrode. Graphical
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Desalination and Water Treatment
·
2024
·
IF 1
Lu Peng,Peng Nian,Jingwei Feng,Xiangxiang Han,Binhua Cui,Songsheng Lu,Jie Zhang,Chenming Li,Aiyong Zhang
The present study evaluated fabrication of bioactivated carbon (BAC) from waste activated sludge (WAS) for methyl tert-butyl ether (MTBE) removal from aqueous solution. BACs were prepared using KOH, H 3 PO 4 , and ZnCl 2 as chemical activation reagents, followed by thermal activation. Batch experiments with different BAC types and dosages, solution pH, initial MTBE concentrations, and contact times were conducted to investigate the BAC effectiveness. The obtained data were analyzed using the kinetics and isotherm model and also with artificial neural network (ANN). The result of Fourier transform infrared (FTIR) spectra of WAS and BAC was depicted that the C–H and C–C were major surface functional groups. The ZnCl 2 activated carbon had the highest adsorption capacity for MTBE adsorption, followed by H 3 PO 4 and KOH activated carbons. The results showed that the highest MTBE removal was observed at solution pH equal to 4 and approximately 30% of MTBE could be adsorbed with 30 min contact time. It was also found that MTBE adsorption followed the R–P isotherm and pseudo-second order (type 1) kinetic models. During ANN modeling, the optimum neurons number for Levenberg–Marquardt training algorithm was determined equal to 5 with highest R 2 value and lowest mean square error were found to be 0.99 and 5.7 × 10 –4 , respectively.
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CATALYSIS TODAY
·
2026
·
IF 5.1
Feng-Xiao Xue,Shuang Wang,Yushuai Sang,Xiao-Qian Feng,Huan Wang,Xuelan Hou,Yong-Hua Zhao
The growing global concern over water pollution has amplified the demand for advanced, sustainable water treatment technologies. Photocatalysis offers a promising solution for effectively removing toxic organic contaminants, such as Rhodamine B (RhB), without generating secondary pollutants. However, despite the widespread use of TiO 2 -In 2 S 3 heterojunctions as photocatalysts to overcome the limitations of TiO 2 , the mechanisms behind their enhanced performance still need to be explored. In this study, a TiO 2 -In 2 S 3 photocatalyst with a heterojunction was constructed, and its enhanced photocatalytic performance was demonstrated by 90.6% degradation of RhB within 30 min, with a degradation rate constant 6.01 times that of pure TiO 2 and 4.89 times that of In 2 S 3 . Mechanistic investigations, including density functional theory calculations, revealed that hydroxyl radicals were the primary active species in the degradation process. Moreover, the TiO 2 -In 2 S 3 heterojunction enhanced the adsorption and stabilization of reaction intermediates, optimizing both reaction kinetics and selectivity. These findings highlight the potential of TiO 2 -In 2 S 3 heterojunctions as highly efficient photocatalysts for environmental remediation.
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Catalysts
·
2026
·Vol. 16
·期 4
·316
·
IF 4.5
Hongbo Liu,Xiaoman Lai,Xinyuan Peng,Jie Huang,Wenbo Tong,Yuhua Chi,Zhiyong Huang
To overcome the inherent limitations of graphitic carbon nitride (g-C3N4), specifically the rapid recombination of photogenerated electron–hole pairs and its confined light absorption range, a sulfur-doped g-C3N4(S-g-C3N4) photocatalyst was developed in this work. The photocatalytic performance and its catalytic mechanism for rhodamine B (RhB) degradation were systematically investigated. Material characterization and performance tests revealed that S doping can narrow the band gap of g-C3N4and effectively enhance the separation and transport efficiency of charge carriers. The as-prepared catalyst demonstrated excellent activity under simulated sunlight, achieving nearly complete degradation of 10 mg/L RhB within 15 min. Moreover, it exhibited robust stability across a pH range of 6 to 11 and in the presence of coexisting anions (Cl−, NO3−, CO32−), with negligible activity loss after five consecutive cycles. Radical trapping experiments verified that ∙OH radicals served as the primary active species, with h+playing a secondary role in the degradation process. This work provides practical guidance for designing durable g-C3N4-based photocatalysts with high performance for organic wastewater treatment.
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高影响因子
CARBON
·
2024
·
IF 10.5
Zhengsen Wang,Dezhi Jiao,Li Cheng,Lanyue Cui,Peimin Hou,Chengbao Liu
Wear microcracks and corrosion are inescapable for marine equipment thus resulting in operational issues, lifespan reduction and even catastrophic failures. Despite significant research has been conducted in anti-wear and corrosion resistant coatings, simultaneous achieving wear-resistant, anticorrosive and visual monitoring of wear damage and corrosion pits remains a significant challenge. Herein, we propose a novel strategy for in-situ and real-time visualization of wear cracks and interfacial corrosion in lubricant coating by utilizing MXene@Rhodamine B (MXene@RhB) fluorescent probes. Through strategic engineering of fluorophores and polyurea networks, conspicuous fluorescence intensification is observed at wear and damaged area, not only immediately upon occurrence but also accompanied with crack propagation. Besides, the precise ion recognition and coordination property of RhB with Fe 3+ brings about distinct fluorescence quenching, enabling visual monitoring of coating wear degradation and interfacial corrosion failure. Moreover, the imbedding of layered MXene significantly improved the tribological performance of composite coating with reduced friction and wear rate. Furthermore, electrochemical investigations revealed that the electrolytes intrusion and steel corrosion reactivity were greatly inhibited through forming numerous shielding layers. The ingenious integration of fluorescent motifs and lubricating units contributes to the development of novel protective coatings, providing reliable strategy for coating lubrication and real-time wear monitoring.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Shulin Zuo,Lilin Wang,Yan Liu,Yanzong Zhang
In recent years, researchers have devoted themselves to developing composites containing cobalt as highly active heterogeneous catalysts of persulfate. Most of them reported that the catalytic degradation processes of organic pollutants were accompanied by the leaching of cobalt ions, but only a few studies considered the contribution of the dissolved cobalt ion to the degradation of organic compounds. A research paper in Journal of Hazardous Materials reported a study on synthesis, application and catalytic mechanisms of cobalt doped hydroxyapatite (Co-HAP) for Rhodamine B (RhB) degradation. We find that non-main catalytic mechanisms were listed and that the effect of Co-HAP was overestimated.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Han Kang,Ze Zhang,Wei Zhou
Rhodamine B(RhB) was encapsulated in Tb(btc) (btc = 1,2,4-benzene tricarboxylic acid) frameworks by “one-pot” method, and the complex RhB@Tb(btc) with host-guest dual fluorescence emissions was synthesized. Compared with the stability of Tb 3+ emission, the characteristic emission of RhB at 620 nm showed a more sensitive response to ambient temperature. By integrating the different temperature dependence of Tb 3+ and RhB emissions, the temperature sensing of RhB@Tb(btc) was determined with relative sensitivity ranging from 0.43 to 0.59% K −1 (temperature range 298–353 K). Among several common antibiotics, RhB@Tb(btc) showed fluorescence quenching response to metronidazole (MDZ) and color transition to levofloxacin (LOFX) respectively with stable reusability. The combination of photoinduced electron transfer and internal filtration effect was confirmed as the contributor to MDZ induced fluorescence quenching. Furthermore, hydrogels and milk, which were added antibiotics on purpose for simulating unsafe foods, were detected at in situ temperature by RhB@Tb(btc) test paper, which achieved highly sensitive and highly selective detection to MDZ and LOFX with limit of detection reaching 10 −6 M.
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CHEMOSPHERE
·
2022
·
IF 8.943
Dongdong Liu,Dengqian Chen,Zhengkai Hao,Yibo Tang,Lipeng Jiang,Tianqi Li,Bing Tian,Cuiping Yan,Yuan Luo,Boyin Jia
In this work, a comparative study of efficient degradation of Rhodamine B (RhB) in CoFe 2 O 4 /H 2 O 2 and CoFe 2 O 4 /PMS systems was performed. Batch experiments indicated that the RhB degradation rate of CoFe 2 O 4 /H 2 O 2 system reached 95.5% at 90 min under the condition of 0.5 g L −1 of CoFe 2 O 4 dosage, 10 mM of H 2 O 2 concentration and 3.0 of initial pH. At certain conditions of initial pH = 7.0, 0.3 g L −1 of CoFe 2 O 4 dosage, 7 mM of PMS concentration, CoFe 2 O 4 /PMS system could completely degrade RhB within 90 min. EPR and quenching experiments indicated that •OH was the main active species of CoFe 2 O 4 /H 2 O 2 system, and •OH, SO 4 • - , •O 2 − and 1 O 2 participated in RhB degradation of CoFe 2 O 4 /PMS system. The circulate of Co(II)/Co(III) and Fe(II)/Fe(III) on the CoFe 2 O 4 surface promoted the formation of free radical species in the two system. In CoFe 2 O 4 /PMS system, the formed •O 2 − and SO 5 • - realized the generation of non-free radical species ( 1 O 2 ). The LC-MS results indicated that N -de-ethylation, chromophore cleavage, opening rings and mineralization were the main steps for the RhB degradation of the two systems. After five cycles of degradation experiment, the CoFe 2 O 4 /H 2 O 2 and CoFe 2 O 4 /PMS systems still maintained the high degradation rate (85.2% and 92.4%) and low mass loss (2.7% and 3.09%). In addition, CoFe 2 O 4 /PMS system had better potential value for the actual water and multi-pollutant degradation than CoFe 2 O 4 /H 2 O 2 system. Finally, the toxicity analysis and cost assessment of the two oxidation systems were preliminarily evaluated.
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Reaction Kinetics Mechanisms and Catalysis
·
2021
·Vol. 134
·期 2
·1003-1015
·
IF 2.081
Chen Anna,Zhang Jin,Zhou Yi,Tang Haiqin
In this study, the MOF-5/BiOBr photocatalyst with microsphere structure was synthesized by hydrothermal method for the first time. The crystal structure, morphology, photoelectric performance and photocatalytic activity of the samples were characterized by XRD, SEM, TEM, XPS and electrochemistry. The results show that the synthesized MOF-5/BiOBr photocatalyst exhibits better photocatalytic performance than pure MOF-5 and BiOBr under simulated sunlight. The efficiency of Rhodamine B (RhB) removal based MOF-5/BiOBr composite (MOF-5 with mass ratio of MOF-5/BiOBr = 20 wt% of) reached 99.7%. The possible photocatalytic mechanism is discussed through the capture experiment of active species. The enhanced photocatalytic performance of the MOF-5/BiOBr composite may be related to the interaction between BiOBr and MOF-5 and the type II charge transfer path. The catalyst has simple preparation process, low cost, high activity under natural light, and high efficiency, and is expected to play a role in the treatment of environmental wastewater. This work provides a new insight for designing MOF-5 based photocatalyst.
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