MOLECULES
·
2023
·Vol. 28
·期 14
·5554
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IF 4.6
Sheli Zhang,Yuerong Yan,Wei Hu,Yunchang Fan
Metal oxide nanoparticles (NPs) have been widely used as catalysts in the chemical industry, but their preparation is usually limited by strict conditions such as high temperature, elevated pressure, and the use of volatile and highly toxic organic solvents. To solve this problem, this work developed an environmentally benign method using green solvents, i.e., natural deep eutectic solvents (NADESs), as a reaction medium to prepare copper oxide (CuO) particles. The experimental results suggested that the synthesized CuO particles were sheet-like mesoporous NPs, and they exhibited excellent catalytic performance towards the photodegradation of rhodamine B (RhB) in the presence of potassium monopersulfate (PMS). The catalytic activity of the synthesized CuO NPs was better than that of the reported metal oxide-based catalysts. Reactive species such as photoexcited holes, superoxide radicals, and singlet oxygen were involved in the RhB degradation. These results indicated that NADESs are good media for the preparation of CuO NPs, and exhibit the potential for application to the preparation of other metal oxides.Keywords:natural deep eutectic solvents;photocatalytic degradation;copper oxide;rhodamine B;photoexcited holes
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Kanghua Li,Yang Xiao,Yuchi Zhao,Yonghui Xia,Jianhua Ding,Quanguo He,Juan Ling,Guangli Li
Rhodamine B (RhB) is a synthetic xanthine dye that is harmful to environment and human health. Therefore, the development of low cost and efficient analytical techniques for RhB monitoring is very critical for environmental protection and food safety. Herein, a novel metal-free voltammetric sensor was constructed for sensitive detection of RhB using carboxyl-functionalized carbon nanomaterials. To understand the role of carboxyl functionalization in RhB electrooxidation, the electrochemical properties and voltammetric responses of carboxyl-functionalized multi-walled carbon nanotube (f-MWCNT), carboxyl-functionalized reduced graphene oxide (f-RGO), multi-walled carbon nanotube (MWCNT) and reduced graphene oxide (RGO) were compared. Amongst, the f-MWCNT/GCE exhibited the lowest charge transferred resistance and the largest electroactive surface area. The f-MWCNT/GCE showed extraordinary electrocatalytic activity for RhB oxidation, which is primarily attributed to the unique 3D structure and the carboxyl functionalization. The anodic peak current of RhB is linearly correlated to RhB concentration from 0.05 to 100 μM with a low limit of detection (LOD, 2.6 nM). In addition, the f-MWCNT/GCE achieved the selective identification and detection of RhB in presence of common metal ions and other red dyes, and retained a robust and stable voltammetric responses for at least a week. The f-MWCNT/GCE was successfully applied to detect RhB concentration in tomato sauce samples with good recovery.
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RSC Advances
·
2022
·Vol. 12
·期 20
·12655-12662
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IF 4.036
Huihui Tao,Zhao Zhang,Qiao Cao,Lingfei Li,Shihao Xu,Changlong Jiang,Yucheng Li,Yingying Liu
A novel carbon dot/Rhodamine B-based ratiometric fluorescent probe was developed for a highly sensitivity and selective detection of nitrite (NO2−). The probe showed colour changes from blue to orange under ultraviolet light in response to NO2− with a detection limit as low as 67 nM in the range of 0 to 40 μM. A ratiometric fluorescent test paper was successfully prepared using the probe solution, which demonstrated its feasibility towards a rapid and semi-quantitative detection of NO2− in real samples.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Shan Xue,Zhilin Xie,Xiaoyu Ma,Yinqi Xu,Shiyu Zhang,Qina Jia,Rui Wan,Haisheng Tao
Carbon-based catalyst-activated persulfate-driven advanced oxidation processes (AOPs) have received great attention for wastewater treatment . Herein, a magnetic Fe-doped activated carbon (FeC 2 O 4 /AC) was successfully prepared via a conventional method using FeC 2 O 4 as an iron source and Zoysia sinica as biomass. FeC 2 O 4 /AC was characterized and used to activate peroxymonosulfate (PMS) for Rhodamine B (RhB) degradation. The influence of various factors on RhB removal was evaluated, including initial pH, temperature, coexisting ions, RhB concentration, PMS concentration and catalyst dosage. Under the optimized condition, the removal efficiency of FeC 2 O 4 /AC for RhB (300 mg/L) reached up to 97% within 150 min. Radical scavenging results and EPR experiments confirm that singlet-oxygen ( 1 O 2 ) was confirmed as the main active species in the degradation of RhB in the FeC 2 O 4 /AC/PMS system. More importantly, the possible route of 1 O 2 generation was revealed: the synergistic effect of Fe species and the activated carbon acts as a crucial part in promoting the PMS activation and contributing to the generation of 1 O 2 . The reaction rate constant ( k obs ) of FeC 2 O 4 /AC is about 7.4 times that of pure AC, and the excellent leaching rate of Fe 2+ (<0.09%) proves that this material is an excellent catalyst. This research on the development of Fe-doped activated carbon with high activity and high stability has profound implications for the effective treatment of organic wastewater.
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CATALYSIS TODAY
·
2022
·
IF 6.562
Yunfei Ma,Wenhui Yue,Zehong Xu,Ziwei Ye,Jinlong Zhang
Composite nanoparticles consisting upconversion nanoparticles (β-NaYF 4 :Yb/Er) and nitrogen doped TiO 2 nanoparticles were constructed via a chemical assembly method. Efficient energy transfer was enabled since the upconverted energy matched up with the band gap of N-TiO 2 . This enables the resulting composite nanoparticles to possess excellent Rhodamine B (RhB) degradation activity under near infrared (NIR) light irradiation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 10
·7900-7912
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IF 2.779
Hu Xuemei,Bao Jianqin,Qiao Junqiang
We report the experimental realization of using copper zinc tin sulfide (Cu 2 ZnSnS 4 ) material for sonocatalytic application for the first time. Hierarchical Cu 2 ZnSnS 4 microspheres were synthesized via a facile one-pot hydrothermal method and characterized systematically. Aggregated Cu 2 ZnSnS 4 nanosheets with an average thickness of ~ 20 nm formed a highly open hierarchical structure. The hierarchical Cu 2 ZnSnS 4 microspheres displayed remarkable sonocatalytic activity both in Rhodamine B degradation and in Cr(VI) reduction. The detailed sonocatalytic experiments revealed that Rhodamine B dye degraded up to 96.4% in 14 min and Cr(VI) reduced up to 98.7% in 10 min and both Rhodamine B degradation and Cr(VI) reduction followed pseudo-first-order kinetics. The reusability tests confirmed that the hierarchical CZTS microspheres have proper stability after 4 consecutive cycles. Moreover, the effects of initial dye concentration, various scavengers, and oxidants on the sonocatalytic RhB degradation process have also been investigated. Furthermore, the plausible mechanism of the sonocatalytic degradation in the presence of hierarchical CZTS microspheres was proposed.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Hanxun Qin,Wenxuan Cao,Faqi Zhan,Qiong Liu,Jiagang Wu
Bi-induced structural distortion was strategically engineered in BaTiO3 nanowires (BT NWs) to reinforce spontaneous polarization and achieve superior piezo-photocatalytic performance for efficient dye degradation. Bi-doped BT NWs (BT_xBi NWs) were synthesized via a facile two-step hydrothermal method. Comprehensive characterizations revealed that Bi3+ substitution at the A-site induces significant lattice contraction, surface cracks, polycrystalline characteristics, and an increased tetragonal phase fraction. These structural distortions, together with an enhanced carrier concentration and optimized electronic structure, markedly improve ferroelectric polarization, charge separation efficiency, and piezoelectric response under mechanical stress. Under ultrasonic-light synergistic conditions, the optimal BT_0.04Bi NWs exhibited an exceptional Rhodamine B (RhB) degradation rate constant of 487.3 × 10-3 min-1, which surpassed most reported piezo-photocatalysts. Reactive species trapping, electrochemical measurements, KPFM, DFT calculations, and COMSOL simulations collectively confirm that Bi doping breaks local symmetry, introduces additional polarization components, redistributes charge density, and amplifies local piezoelectric potential at crack sites. This work provides a novel and effective doping strategy for simultaneously modulating polarization and electronic properties in ferroelectric perovskites, offering new insights into the design of high-performance piezo-photocatalysts for environmental remediation.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Yuhao Luo,Zhengdong Zhang,Shanhua Chen,Ao Jiang,Xingyu Chen,Xiaodong Zhu,Yuli Di
In this study, to enhance the peroxymonosulfate (PMS)-assisted photocatalytic degradation of Rhodamine B (RhB) under visible light over TiO 2 , a novel halloysite nanotube (HNTs) supported TiO 2 composite photocatalyst was prepared by the sol-gel method. The crystal structure and bonding information of samples were investigated by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–visible diffuse reflection spectroscopy (DRS), photoluminescence (PL) and electrochemical impedance spectroscopy (EIS) were used to characterize the morphology, optical properties and energy band structure of the samples. The composite with weight ratio of 1:5 (HNTs/TiO 2 ) (named HT-20) exhibited apparently enhanced PMS-assisted photocatalytic RhB degradation efficiency and can degrade approximately 95.31 % of RhB in 30 min, and the first-order rate constants (k) of HT-20-PMS system is about 54.5 times higher than that of B–TiO 2 . In addition, the possible mechanism of enhanced PMS-assisted photocatalytic activity of HT-20 was proposed. The improvement of photocatalytic activity in the composite photocatalyst can be ascribed to the large surface area and strong adsorption capacity of HNTs.
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JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
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2021
·
IF 1.99
Baicun Li,Yinhe Sun,Jing Lu,Xin Peng
The binding of rhodamine B (RB) to human serum albumin (HSA) in the absence and presence of Cu2+ or Fe3+ under simulated physiological conditions was studied by using various biophysical methods for the first time. The results showed that the interaction between HSA and RB could spontaneously result in the formation of HSA-RB complex (namely, static quenching mechanism) through hydrophobic interactions and hydrogen bonds irrespective of the absence or presence of metal ions. The presence of metal ions led to the reduction of binding affinity of RB to HSA compared with no metal ions, which might result from the conformational change of HSA caused by the binding of metal ions. Furthermore, the analysis of UV-vis absorption, circular dichroism, synchronous fluorescence and three-dimensional fluorescence experiments demonstrated that the addition of RB induced conformational and microenvironmental changes of HSA without and with metal ions. In short, this work will be helpful to in-depth understand the transport mechanism and biological effect of RB and the effect of metal ions on the interaction of HSA-RB in vivo.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 2
·1577-1589
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IF 3.553
Li Zhaohua,Hu Rui,Ye Shuai,Song Jun,Liu Liwei,Qu Junle
Abstract We report herein a versatile new approach for improving the photodegradation performance of UiO-66 by introducing 2-methylimidazole through a straightforward in situ one-pot solvothermal method. The resultant complex UiO-66-M-0.7 has demonstrated a reaction rate constant of 0.0183 min −1 in the photodegradation of rhodamine B under visible light, which is 69.4% higher than that with unmodulated UiO-66. Further investigation has confirmed that the improved activity can be attributed to enhanced adsorption of the dye by the photocatalyst during the adsorption–desorption equilibrium. The main active species involved in the photodegradation process have been identified as h + and O 2 − ·. In addition, the complex has shown ideal stability in recycling tests and excellent activity in the degradation of methylene blue. This study provides a novel perspective for the future design of various photocatalysts with superior performance. Graphic abstract 2-Methylimidazole-modulated UiO-66 exhibits increased catalytic performance in the photodegradation of rhodamine B (RhB) under visible light because of enhanced adsorption of RhB on the catalyst during the adsorption-desorption equilibrium.
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Biomaterials Science
·
2019
·Vol. 7
·期 5
·1933-1939
·
IF 5.251
Yan-Hua Zhu,Ji-Long Wang,Hou-Bing Zhang,Malik Ihsanullah Khan,Xiao-Jiao Du,Jun Wang
Polymeric nanoparticles as drug delivery systems have the potential to improve the therapeutic efficacy and reduce the toxicity of chemotherapeutic drugs by enhancing the drug selectivity in vivo. The efficacy is directly dependent on the polymeric nanoparticles’ in vivo fate. Therefore, it is very important to develop a method to stably label the polymeric nanoparticles for detecting the in vivo fate. Here, we report a method to stably label self-assembled nanoparticles by the incorporation of rhodamine B-conjugated poly(ε-caprolactone) (PCL–RhoB). Only 1% of PCL–RhoB was released from the RhoB-labeled polymeric nanoparticles (RhoB–PNPs) in phosphate buffer within 12 hours, which suggested that the signal of PCL–RhoB can be used to represent the behaviors of polymeric nanoparticles both in vitro and in vivo. PCL–RhoB could be effectively extracted and quantitatively detected by ultra-high-performance liquid chromatography (UPLC) in various media, such as PBS, a cell culture medium containing 10% FBS (pH = 7.4 and pH = 6.8), mouse serum, simulated intestinal fluid and cell or tissue lysis. The intracellular contents of PCL–RhoB in MDA-MB-231 cells detected by UPLC were linearly correlated to the concentration of the RhoB–PNPs. In addition, the contents of PCL–RhoB in plasma and the spleen were proportional to the injected dose of RhoB–PNPs in vivo. As an application example, the pharmacokinetics and biodistribution of the nanoparticles over time in vivo were analyzed following intravenous injection to confirm the feasibility of this method.
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Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 6
·1345-1361
·
IF 5.958
Yu Zhang,Qian Shao,Heyun Jiang,Lirong Liu,Mingyang Wu,Jing Lin,Jiaoxia Zhang,Shide Wu,Mengyao Dong,Zhanhu Guo
Bismuth oxychloride (BiOCl) and cerium dioxide (CeO2) composites were successfully synthesized via a facile one-step co-precipitation method. The BiOCl/CeO2 composites were observed to be sheet-like structures with some CeO2 nanoparticles distributed on the surface. The BiOCl/CeO2 composites exhibited higher photodegradation performance (98.8%) of rhodamine B (RhB) than pure BiOCl (80.2%) and CeO2 (9.6%) under solar simulated irradiation. The BiOCl/CeO2 composites with a Bi/Ce molar ratio of 4 : 1 exhibited the highest photocatalytic performance for RhB, and an optimal RhB degradation efficiency of 98.8% was achieved under solar simulated irradiation for 60 min. The photocatalytic performance results were compared with other BiOCl composites. The photocatalytic mechanisms of BiOCl/CeO2 composites were discussed by radical trapping experiments and electron spin resonance (ESR), which indicated that h+ and ˙O2− were the dominant radicals for RhB degradation.
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