Materials
·
2022
·Vol. 15
·期 12
·4058
·
IF 3.748
Haijie He,Kuan Chai,Tao Wu,Zhanhong Qiu,Shifang Wang,Jie Hong
Organic dye rhodamine B is one of the common organic pollutants in the water and soil environment. This study investigated the feasibility of removing rhodamine B from an aqueous solution through adsorption by kaolin, kaolin-sodium bentonite, and kaolin-organic bentonite. Batch adsorption test results showed that the maximum adsorption quantities of kaolin, kaolin-sodium bentonite, and kaolin-organic bentonite were 7.76 mg/g, 11.26 mg/g, and 12.68 mg/g, respectively, implying that the addition of bentonite to kaolin can effectively improve its adsorption capacity for rhodamine B. Moreover, the Langmuir isotherm model is suitable to describe the adsorption of rhodamine B by kaolin and kaolin-sodium bentonite, while it is preferable to use the Freundlich isotherm model in the case of kaolin-organic bentonite. The adsorption kinetic characteristics of rhodamine B, by these three adsorbents, are suitable to be described with a pseudo-second order kinetic model. Furthermore, the characteristics of the above three adsorbents were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The above results indicated that kaolin and organic bentonite can be used to design efficient adsorbents for organic pollutants similar to rhodamine B.
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高影响因子
BIOORGANIC & MEDICINAL CHEMISTRY
·
2017
·Vol. 26
·期 8
·1448-1452
·
IF 2.93
Ting Lv,Yongqian Xu,Hongjuan Li,Fengyu Liu,Shiguo Sun
A new Rhodamine B-based fluorescent probe (RBO) is successfully designed and synthesized, which is a higher selective and sensitive chemosensor for Cu 2+ than other ions. Under physiological conditions (pH = 7.0), the non emission RBO displays a rapid fluorescence increase together with a color change after addition of Cu 2+ and the detection limit is down to 28 nM, which can clearly illustrate the distribution of Cu 2+ with the help of laser scanning confocal microscope in plant tissues. Eventually, it confirmed that the Cu 2+ accumulates mostly in the vascular cylinder and very less in the epidermal cells of maize roots, which is important to understand how the plants take up, transport and store in the Cu 2+ .
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APPLIED GEOCHEMISTRY
·
2026
·
IF 3.5
Wenteng Chu,Runshen Feng,Cheng Wang,Yanting Pan,Hong Su,Feng Jiang,Xiaoming Wang,Hui Yin,Xionghan Feng
Vernadite is often used for pollutant adsorption, oxidation and interfacial catalysis due to its diverse structure, high reactivity and environmental friendliness. Rhodamine B was employed as a model organic contaminant in this study to investigate the capability of Vernadite-activated sulfite for organic pollutant degradation and to elucidate the activation mechanism of sulfite in the Vernadite/sulfite system. Vernadite was able to partially decolorize approximately 90.3% of Rhodamine B (RhB) due to its strong surface activity. Upon the addition of sulfite, RhB was fully degraded within 20 minutes, and the solution was observed to change from red to colorless. It was discovered that dissolved oxygen was crucial to the process. As the sulfite content rose, the degradation efficiency first rose and then decreased, but it rose as the mineral dosage increased. The system was effective within the pH range of 3-7, though efficiency declined as pH increased. The presence of common coexisting ions had minimal impact on the performance, particularly in the presence of humic acid (HA), where degradation remained effective. Mn (III) and singlet oxygen ( 1 O 2 ) were confirmed to be the primary reactive species in charge of RhB degradation by electron paramagnetic resonance (EPR) and quenching studies. These results demonstrate the possible uses of minerals containing manganese dioxide as heterogeneous catalysts for environmental remediation under realistic wastewater treatment conditions.
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CHEMICAL PAPERS
·
2025
·
IF 2.5
Li Liuqing,Wei Zhengwen,Lü Xiang-fei,Jiang Zhen-Yi,Wang Wei
By utilizing the in situ polymerization reaction of o-tolidine and p-phthalaldehyde, magnetic inorganic/organic hybrid materials were synthesized. Various characterization techniques were employed to analyze the morphology and phase composition of the materials. Using Rhodamine B as a characteristic pollutant, it was found that the maximum adsorption capacity of the materials reached 171.59 mg/g. Density functional theory (DFT) calculations were conducted on different adsorption configurations, revealing that the adsorption process is primarily dominated by π–π interactions, alongside electrostatic attraction and donor–acceptor interactions. This provides a theoretical basis for the subsequent design and preparation of more efficient adsorption materials.
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Journal of the Taiwan Institute of Chemical Engineers
·
2026
·
IF 6.3
Zhenying Li,Yanze Yang,Xu Chen,Yulu Hu,Xia Sun,Jiliang Xie,Tao Yang
Background:As a typical refractory cationic dyes, Rhodamine B (RhB), poses a significant challenge in aquatic environment. Methods:To address this issue, this study fabricated a novel TBO-PSPH/MXene composite membrane by covalently grafting the silane-based N-halamine poly[5,5-dimethyl-3-(3’-triethoxysilylpropyl)hydantoin](PSPH) onto the surface of MXene, followed by the intercalation of the polycyclic dye Toluidine Blue O (TBO) into MXene interlayers. The composite membrane was characterized by XRD, XPS, FT-IR, N 2 adsorption /desorption, AFM and FESEM. Signifiicant Findings:The results demonstrated that the intercalation of TBO significantly enhanced structural stability of the membrane as well as the incorporation of PSPH reduced the surface negative charges and improved hydrophilicity of the membrane. Separation experiments with a 15 mg/L RhB solution at pH 1 and room temperature (RT) demonstrated a high rejection of 97.3% and a water flux of 4.63 L/(m²·h·bar). Notably, the incorporation of 10% NaCl significantly enhanced membrane performance, elevating RhB rejection to 98.9% while increasing water flux to 6.29 L/(m²·h·bar). The separation mechanism is attributed to synergistic effects of electrostatic repulsion, size-sieving, steric hindrance, and adsorption. This work provides a promising strategy for developing high-performance MXene membranes for treating challenging dye wastewater under various conditions.
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Journal of Applied Spectroscopy
·
2026
·
IF 0.7
Hu Guowei,Wang Xiaohuan,Yuan Zhipeng,Guo You,Yang Congjie
Constructing heterojunctions is important for improving the photocatalytic performance of materials. In this study, porous Fe 2 TiO 5 was prepared via a sol-gel method, and CuS was grown in situ on its surface through a hydrothermal process, thereby successfully synthesizing CuS/Fe 2 TiO 5 heterojunction composites. The CuS/Fe 2 TiO 5 composites were characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-Vis), and Brunauer–Emmett–Teller (BET) analysis. The results indicated that CuS is uniformly loaded on the surface of Fe 2 TiO 5 , with lattice spacings of 0.3550 and 0.2972 nm corresponding to CuS and Fe 2 TiO 5 , respectively, and no impurity phases were observed. Heterojunction construction induced distortion of the TiO 6 octahedra at the interface, resulting in the emergence of a new absorption peak in the ultraviolet region. Among the samples, the 20 wt.% CuS/Fe 2 TiO 5 (denoted as 20CuF 2 ) composite exhibited a specific surface area (S BET = 6.17 m 2 /g) between those of CuS (S BET = 4.87 m 2 /g) and Fe 2 TiO 5 (S BET = 7.71 m 2 /g). Its bandgap was tuned to 1.78 eV, and the photoluminescence intensity was significantly reduced. A CuS/Fe 2 TiO 5 heterojunction composite was applied to facilitate the degradation of rhodamine B (RhB), achieving a degradation efficiency of 91.8%. The heterojunction catalysts developed in this study enable the effective degradation of pollutants in wastewater, providing a feasible technical reference for catalyst development and application.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Yongmin Chen,Shulan Pu,Dongying Wang,Yongchao Zhang,Guojiang Wan,Qiang Zhao,Yan Sun
Zeolitic imidazolate framework-8 (ZIF-8) was coupled with AgBr using a facile deposition–precipitation method to synthesize AgBr@ZIF-8 composites. The photocatalytic activity of prepared photocatalysts was evaluated by the degradation of Rhodamine B (RhB). As expected, the photocatalytic activity of the AgBr@ZIF-8 photocatalysts was superior to that of ZIF-8 and AgBr. Among the AgBr@ZIF-8 photocatalysts, AgBr@ZIF-8 with a ZIF-8 loading of 5 wt% exhibited the highest photocatalytic efficiency of 99.5 % within 15 min. The remarkable photocatalytic activity of the AgBr@ZIF-8 composites was attributed to the heterojunction between ZIF-8 and AgBr, which reduced the recombination rate of electron-hole pairs, thereby enhancing the photocatalytic efficiency of the catalysts. According to the trapping experiment, superoxide radicals (•O 2 - ) and holes (h + ) were certified as the main species in the efficient removal of RhB.
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Sustainability
·
2023
·Vol. 15
·期 17
·13034
·
IF 3.9
Tiantian Ye,Lihong Liu,Yilin Wang,Jianqiang Zhang,Zhenxing Wang,Cong Li,Haoyu Luo
In this study, an innovative method for RhB (Rhodamine B) degradation in a persulfate (PS) and hand warmer heterogeneous activation system was investigated. The hand warmer showed better catalytic performance and excellent reusability in terms of PS activation. The reaction rate constants of RhB removal in the hand warmer/PS process (0.354 min−1) were much faster than those in other PS- and Fe-related processes (0.010–0.233 min−1) at pH 7. The iron in the hand warmer is the main active ingredient to catalyze PS, and activated carbon, salt, and H+/OH−accelerate the activated reaction due to the formation of micro-batteries in the solution. Moreover, the catalyst of the hand warmer showed excellent stability and reusability with a low level of iron leaching. This new, effective, inexpensive, repeatable, and environmentally friendly catalyst combined with PS has promising prospects for the removal of dyes from industrial wastewater.Keywords:heterogeneous activation;persulfate;hand warmer
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CHEMOSPHERE
·
2022
·
IF 8.943
Peng Wang,Shiqi Zhong,Mei Lin,Cong Lin,Tengfei Lin,Min Gao,Chunlin Zhao,Xiangqi Li,Xiao Wu
Recently, the lead-free piezoelectric material Bi 0.5 Na 0.5 TiO 3 (BNT) has been adopted for piezo-catalysis and synergistic catalysis, such as piezo-photocatalysis. Nonetheless, the catalytic effect of single BNT is too weak to degrade multifarious contaminants. Here, BNT and multi-walled carbon nanotubes (MWCNTs) composite were prepared and the catalytic performance of BNT was prominently boosted by introducing MWCNTs as the electron capturer. Particularly, the degradation rate of Rhodamine B (RhB, a typical contaminant) could reach 90% within 30 min, with a high rate constant of 0.0805 min −1 . The specific degradation pathway of RhB was analyzed. The formation of oxygen vacancies was confirmed by XPS analysis, and the vital role of oxygen vacancies in the separation of photo-generated carriers was elucidated. Meanwhile, the BNT/MWCNTs composites manifested stronger transient current response compared to single BNT under the action of light irradiation and ultrasonic vibration, respectively. According to impedance analysis, the composites exhibited lower carrier transport resistance. Eventually, the mechanism of enhanced piezo-photocatalysis was explained in detail. This study provides an effective route to break the shackle of carrier recombination and speed up the carrier transport in piezo-photocatalytic materials.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Aijing Li,Xinpeng Chen,Yurong Sun,Jin Cheng,Ping Yao,Tieling Xing,Guoqiang Chen
An essential factor affecting the photocatalytic efficiency of a catalyst is the efficient separation of photogenerated electrons and holes. In the present study, a novel heterojunction material, PCN@GO/AgNPs, was synthesized with the aim of improving the photocatalytic performance. This achievement was accomplished through the establishment of a heterojunction between graphitic phase carbon nitride (PCN) and nano silver (AgNO 3 ). The PCN was prepared from melamine powder calcined at high temperature under nitrogen environment, and was modified by graphene oxide (GO) to form heterojunction with silver nanoparticles, which resulted in a significant improvement in the photocatalytic efficiency of the catalyst. Under ultraviolet（UV）excitation, the catalytic rate constant of PCN@GO/AgNPs heterojunction on RhB dye can reach 10.594 × 10 −2 min −1 . This research represents a promising strategy to increase the surface area of PCN photocatalysts through simply doping noble metal and thus improving photocatalytic performance, which contributes to understand the reaction mechanism of photocatalytic effect.
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CRYSTAL RESEARCH AND TECHNOLOGY
·
2020
·Vol. 55
·期 11
·2000093
·
IF 1.169
Hongjun Chen,Zi Wang,Zeyang Xue,Chunhu Yu,Lizhai Pei,Chuangang Fan
A Bi 2 O 3 /In 2 O 3 heterojunction is successfully fabricated via a facile hydrothermal method using sodium bismuthate and indium nitrate as the source materials. The crystal structure, composition, micromorphology, and optical property of the Bi 2 O 3 /In 2 O 3 heterojunction are analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectrum, scanning electron microscopy, transmission electron microscopy, and solid ultraviolet-visible (UV-vis) diffuse reflectance spectra. The Bi 2 O 3 /In 2 O 3 heterojunction exhibits a remarkable photocatalytic degradation capacity for Rhodamine B, which is better than that of pure Bi 2 O 3 and In 2 O 3 . The photogenerated charges separation and transfer process of the Bi 2 O 3 /In 2 O 3 heterojunction follows a direct Z-scheme mechanism under UV–vis light irradiation. The trapping experiment indicates that oxidative radicals including •OH, h + , and •O 2 − play crucial roles in the photodegradation process. The outstanding photodegradation capacity is ascribed to spatially separated charge carriers, fast-charge transportation characteristic, and special bandgap structure of the Bi 2 O 3 /In 2 O 3 heterojunction. The introduction of H + and OH − ions into the reaction system promotes the formation of •OH and •O 2 − radicals, significantly enhancing the photodegradation rate of RhB. This study presents a new insight into the construction of the Z-scheme Bi 2 O 3 /In 2 O 3 heterojunction photocatalyst with potential application in wastewater treatment.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Fenqi Du,Dongmei Yang,Yue Sun,Yang Jiao,Feng Teng,Haibo Fan
Ultrawide band gap semiconductor materials have attracted considerable attention in recent years owing to their great potential in the photocatalytic field. In this study, Zn-doped Ga 2 O 3 nanofibers with various concentrations were synthesized via electrospinning; they exhibited a superior photocatalytic degradation performance of rhodamine B dye compared to that of undoped Ga 2 O 3 nanofibers. The Zn dopant replaced Ga sites via replacement doping, which could increase the concentration of oxygen vacancies and lead to enhanced photocatalytic properties. When the Zn concentration increased, a Ga 2 O 3 /ZnGa 2 O 4 hybrid structure formed, which could further enhance the photocatalytic performance. The separation of photogenerated carriers due to Zn doping and heterojunctions were the primary causes of the enhanced photocatalytic performance. This study provides experimental data for the fabrication of high-performance photocatalysts based on Ga 2 O 3 nanomaterials .
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