JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Shan Huang,Mengmeng Wang,Jiajia Liu,Xinqi Liu,Min Xue,Yi Fang,Qi Xiao
Black phosphorus (BP) is highly regarded in photocatalysis for its bandgap thickness dependency, high hole mobility, and broad visible light absorption. This study introduces a simple hydrothermal method to construct a BP QDs/BiVO 4 direct Z-scheme heterojunction. The composite’s crystal structure, morphology, and photochemical properties were comprehensively characterized. The photocatalytic activity was evaluated using Rhodamine B (RhB) degradation under visible light. Notably, BP QDs 0.12% /BiVO 4 exhibited exceptional performance, achieving a 95.4 % RhB degradation after 100 min, three times higher than BiVO 4 alone. The direct Z-scheme heterojunction played a pivotal role in facilitating O 2 − and h + involvement in the degradation process. The interfacial interaction between BP QDs and BiVO 4 significantly enhanced BiVO 4 ′s visible light absorption, preserving its strong oxidation–reduction capacity. This enhancement was further corroborated by DFT simulation calculations. Overall, this study presents a novel approach for constructing efficient Z-scheme photocatalysts based on BP QDs, laying a solid foundation for their application in the field of photocatalytic degradation.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Dechong Ma,Jiawei Tang,Guowen He,Yun Xue,Sai Pan,Fengjiao Liu,Jingzhe Zhao
This study utilized X-diffraction, BET, photoluminescence , UV–vis DRS, FTIR , SEM, XPS , TOC analysis, EPR , electrochemical measurements, and LC-MS to characterize the structural characteristics, morphology, optical properties , photocatalytic activity , surface electronic states, active compounds, and potential photodegradation pathways of rhodamine B (RhB) over as-prepared Bi 2 O 3. The as-prepared Bi 2 O 3 photocatalyst exhibited a narrow bandgap, which enabled efficient absorption of visible light, thereby contributing to its enhanced photocatalytic activity. Additionally, Bi 2 O 3 exhibited a high degradation efficiency for RhB. with up to 96.8 % of RhB removed within 120 min at pH 3.0. The excellent photocatalytic performance of Bi 2 O 3 can be attributed to the formation of the heterogeneous Bi 2 O 3 /BiOCl structure on the Bi 2 O 3 surface in the presence of HCl. Moreover, the TOC analysis revealed that over 58.1 % of the carbon in the RhB solution was mineralized into CO 2 after 120 min of irradiation. The effect of catalyst content, RhB concentration, initial pH, and inorganic anions on the photocatalytic degradation of RhB over Bi 2 O 3 was examined. Furthermore, the active compounds and potential photocatalytic mechanism of the Bi 2 O 3 /BiOCl heterogeneous structure toward RhB were evaluated. The intermediates formed during RhB degradation were identified, and the corresponding degradation pathway was deduced via LC-MS.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 44
·20575-20592
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IF 3.5
Yang Yutong,Qi Wenkang,Xie Yuanyuan,Huang Chunjie,Su Qiaoqiao,Xue Xingyong,Han Yaocong,Wei Dongping
As efficient activators of peroxymonosulfate (PMS), cobalt ions play an important role in the degradation of organic pollutants. It is imperative to synthesize PMS activators from low-cost materials with uniform structures to improve the catalytic efficiency and cycle life and reduce the cost of wastewater treatment, which has practical importance. In this work, alkali-activated slag geopolymer microsphere-supported Co catalysts (Co-GMs) were synthesized via a simple solution impregnation method and used for the degradation of Rhodamine B (RhB). The Co-GM/PMS system is highly efficient, and the degradation rate of RhB (40 mg/L) reached 99.8% within only 10 min. Moreover, Co-GM has a wide pH range from 3 to 9 and good anti-interference performance for other ions, as well as low Co 2+ leaching (0.809 mg/L) and favorable reusability. Reactive oxygen species (ROS) were explored via radical quenching experiments and electron spin-resonance (ESR) spectroscopy, which revealed determined that the major ROS involved in the degradation of RhB are 1 O 2 and SO 4 ·− . The synergistic effect of free and nonfree radicals plays an important role during degradation. Moreover, four probable degradation pathways were proposed via liquid‒phase mass spectrometry (LC‒MS). The results revealed that the removal rate of total organic carbon (TOC) reached 74.2% within 60 min. This research innovatively proposed the application of geopolymer composite catalysts in advanced oxidation and developed an ultralow-cost PMS activator for highly efficient degradation of RhB, which represents a new choice for wastewater treatment. Graphical abstract
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70023
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IF 0
Xinpeng Chen,Jiabao Wu,Runshan Chu,Lili Xing,Yurong Sun,Jiapeng Wang,Guoqiang Chen,Tieling Xing
There are tremendous potential in utilizing metal–organic frameworks (MOFs) for enhancing the removal of organic dyes from wastewater. However, the recovery of powdered catalysts poses a significant challenge. In this study, four different iron-based metal–organic frameworks (Fe-MOFs) were synthesized by growing them in situ on carboxylated cotton fabrics. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were employed to conduct a comprehensive characterization of the Fe-MOFs. The dye removal rate of Fe-MOF@Cotton was meticulously determined by comprehensively investigating various factors including the concentration of the dye and hydrogen peroxide (H 2 O 2 ), the pH value of the solution, and the temperature. Extensive catalytic degradation experiments were conducted to assess the performance of Fe-MOF@Cotton. The results vividly demonstrated that Rhodamine B (RhB) was photocatalytically degraded by Fe-MOF@Cotton with remarkable efficiency in the presence of H 2 O 2 . Notably, the four MOF fabric composites were capable of degrading over 97% of RhB with a concentration of 20 mg/L. Moreover, these composites exhibited excellent reusability, strongly indicating their significant potential for application in the dye wastewater treatment industry. This not only highlights the effectiveness of Fe-MOF@Cotton in dye removal but also offers a promising avenue for addressing the challenges associated with dye-contaminated wastewater treatment.
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Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 4
·1-12
·
IF 23.2
Lu Yukun,Zhang Yaojie,Zhang Jiale,Li Zhaoyang,Hu Feiyang,Pan Duo,Melhi Saad,Shi Xuetao,Amin Mohammed A.,El-Bahy Zeinhom M.,Shao Qian
Tin (Sn) micro-nanoparticles with special pine tree dendritic morphology were synthesized by using tin foil as the anode and titanium as the cathode through simple anodization method. Surprisingly, it is found that the morphology of Sn particles is closely related to factors such as the type of electrolyte, the concentration of the electrolyte, and the different applied voltages, and briefly discussed the influence of various factors on the growth of Sn particles. In addition, Sn particles are calcined under different temperature conditions to obtain Sn/SnO 2 hybrid materials with different tin dioxide (SnO 2 ) contents. The changes in morphology and the phase of SnO 2 crystal lattices were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively, which proved the successful synthesis of Sn/SnO 2 mixed materials. Finally, the Sn/SnO 2 hybrid material with metal-doped modified semiconductor properties was used to photocatalytic degradation of simulated organic pollutants rhodamine B (RhB). It was found that the photocatalytic degradation efficiency of the Sn/SnO 2 hybrid material under simulated sunlight conditions is near 90% in 5 h. Therefore, this work provides a convenient and effective environmental protection approach for the treatment of architecture and industrial dyes. Graphical Abstract Tin (Sn) micro-nanoparticles with special pine tree dendritic morphology are synthesized through simple anodization method, and the final product Sn/SnO 2 particles after different heat treatments show superior photocatalytic degradation of RhB under simulated solar light.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tian Wang,Wei Wang,Yunqing Zhu,Baozhong Zhang
AuNPs/rGO composite cathode was prepared using in-situ reduction method and was applied for H 2 O 2 generation through molecular oxygen (O 2 ) undergoing a 2-electron reduction reaction in the electro-Fenton system. The results showed the AuNPs/rGO cathode exhibited good activity and stability. The size and loading amount of AuNPs, as well as applied voltages were considered for evaluating the catalytic activity of AuNPs/rGO cathode. AuNPs 2:1 /rGO with the smallest size (2.8 ± 0.6 nm) exhibited higher catalytic activity in the electro-Fenton system when the AuNPs 2:1 loading amount was 2.7 %, pH= 3, and applied voltage was −0.6 V (vs. SCE), resulting in an H 2 O 2 yield of 19.3 ± 0.1 mmol g −1 . The synergistic effect of AuNPs 2:1 and rGO enhanced the activation of H 2 O 2 , generating a large number of hydroxyl radicals (∙OH) for efficient degradation of rhodamine B (RhB), corresponding to a degradation efficiency of 100 % within 30 min. In addition, AuNPs 2:1 /rGO exhibited excellent stability and reusability in cyclic experiments. The quenching experiment and the radical spin trap test showed ∙OH and superoxide anion (∙O 2 ̄) as the active species during the reaction process. Furthermore, LC-MS and in-situ FTIR were used to analyze the intermediate products of the degradation process and determine the reaction mechanism.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Yilan Zhao,Xue Jiang,Ke Huang,Xiaoli Xiong,Qing Yang
A switchable ratiometric fluorescent smartphone-assisted sensing platform based on nitrogen-doped carbon dots (N-CDs) and Rhodamine B was fabricated for the determination of the ascorbic acid (AA) content in fruits by quenching the fluorescence of N-CDs with Hg 2+ (turn-off) and recovering with AA (turn-on). The blue-emission N-CDs was synthesized by liquid dielectric barrier discharge microplasma with an average size of 3.65 nm and an absolute quantum yield of 18 % (excited at 345 nm). In addition, the fluorescence color was converted to RGB values, enabling visual and quantitative determination of AA. Under optimal parameters, the linear ranges for detecting AA were found to be 3–170 μM and 5–170 μM for fluorescence spectrometer and smartphone sensing platform. The detection limits were 0.98 μM and 2.90 μM, respectively. Furthermore, the satisfactory recoveries in fruits were obtained by RF probe and smartphone platform. This smartphone-assisted platform will facilitate sensitive and visual determination for AA.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Song He,Jianxu Gao,Xin Jin,Saiping Guo,Yajun Huang
Sulfate radical-based advanced oxidation technologies (SR-AOPs) are extensively employed in the degradation of diverse wastewater pollutants owing to their superior capacity for degrading emerging and recalcitrant pollutants and their excellent adaptability. However, how to reduce the secondary pollution caused by metal ion spillage is still a major problem. In this work, Co 2+ was introduced into the molding process of SiO 2 microspheres as a novel activator of per-oxomonosulfate (PMS), which 15 mg of the catalyst completely degraded 100 mL of 40 mg/L of Rhodamine B (RhB) in 10 min, with a low Co leaching of only 0.18 mg/L. The effects of the introduction of Co, the addition of polyvinylpyrrolidone (PVP), H 2 O, and PMS, and the adjustment of pH, temperature, and anionic inorganics on the degradation of RhB were investigated. Based on the PMS activation mechanism analysis, it was concluded that the degradation of RhB involves two pathways, including the non-radical pathway dominated by 1 O 2 and mediated electron transfer and the radical pathway dominated by SO4 − , OH, and O2 − . This study presents a novel hybrid catalyst with high efficiency and easy recyclability, good recyclability, and low secondary pollution, which provides valuable insights into the field of wastewater treatment.
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CELLULOSE
·
2024
·
IF 4.9
Liu Lei,Hu Yufan,Yang Yuhui,Cheng Hongbin,Xiao Shili
Printing and dyeing wastewater can cause serious environmental pollutant and must be treated to meet the emission standards before discharge. In this study, we report a method to prepare nano zero-valent iron (nZVI) particle-immobilized cotton (nZVI@cotton) fabrics assisted by polydopamine (PDA) deposition using cotton fabrics as the substrate. The mechanical property tests of cotton fabric revealed a significant improvement in the breaking strength after deposition of PDA. The pollutant removal capability of nZVI@cotton fabric was evaluated using rhodamine B and Cr(VI) as models. The decolorization efficiency of rhodamine B could be up to 79.45% and Cr(VI) removal efficiency was 70.74% within 60 min, respectively. In addition, the iron content, different nZVI@cotton fabric system, the effect of pollutant composition and reusability of nZVI@cotton fabric were systematically investigated. Results showed that nZVI@cotton fabric prepared with the assistance of PDA was a kind of comparable wastewater purification material with the advantages of high removal efficiency to rhodamine B and Cr(VI) ions and easy to be recycled.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Hong Wu,Yumin Hao,Xinyan Cheng,Huiping Wang,Wenjuan Dong,Shaomin Shuang,Qin Hu,Chuan Dong,Xiaojuan Gong
Nitrite (NO 2 − ) is common in food and water and poses health risks, requiring rapid detection. Here, a ratiometric fluorescent probe combining phenylenediamine-derived carbon dots (Ph-CDs) with Rhodamine B (RhB) was developed for quick, accurate NO 2 − sensing. Under acidic conditions, NO 2 − reacts with amino groups on Ph-CDs via diazotization, causing a clear fluorescence change within 200 s. RhB provides a stable reference, allowing self-calibrating dual-emission output that reduces matrix and environmental interferences. Coupled with smartphone imaging, the probe enables real-time visual detection and quantification without complex instruments. The system showed high sensitivity (LOD: 0.10 μM) and good accuracy (recoveries: 96.8 %–101.8 %) when tested in food and tap water, demonstrating strong reliability in complex samples like cured meats. This portable, user-friendly platform offers an effective tool for on-site NO 2 − screening, supporting food safety and environmental monitoring, especially in resource-limited settings.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Denis P. Ordinartsev,Andrey A. Rempel,Xiaojun Han
Finding new, effective photocatalysts for the degradation of organic pollutants is a pressing issue in water treatment. Oxide photocatalysts are difficult to synthesize and impractical to use because they are most effective in the form of suspensions, sols, or nanoscale powders. This article demonstrates the photocatalytic ability of a hybrid polyvinyl alcohol-titanyl film photocatalyst to degrade Rhodamine B and formaldehyde. This hybrid material is an easily synthesized alternative to oxide photocatalysts that can be used to photodegrade organic pollutants. 99.8 % of Rhodamine B is degraded in 90 min with a catalyst-to-solution ratio of 1:100 for a 0.05 mM Rhodamine B solution. The film photocatalyst is transparent and colorless, with a band gap of 3.39 eV and an adsorption edge at 354 nm, corresponding to a forbidden direct transition. After irradiation, the photocatalyst's color changed to blue, and new photodegradation activity peaks were registered at 400 and 500 nm. The reversible color change of the photocatalyst enhances light absorption and promotes the effective separation of electron-hole pairs. Based on data from the Scavenger study and TOC measurements, a mechanism for the photodegradation of Rhodamine B on a hybrid polyvinyl alcohol-titanyl photocatalyst was proposed. The structure of the hybrid photocatalyst was characterized using XPS and IR spectroscopy, and the distribution of titanium in polymeric matrix was analyzed by SEM combined with EDX. This work demonstrates the potential of the synthesized polyvinyl alcohol-titanyl hybrid photocatalyst for the efficient photodegradation of organic pollutants.
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LANGMUIR
·
2025
·
IF 3.9
Heng Li,Chengzhong Zhang,Yuhang Jiang,Wenwu Ni,Mingshuo Li,Jing Wang
Widespread dye contamination poses a serious threat to humans and aquatic environments. Metal–organic frameworks (MOFs) with abundant reactive groups and high specific surfaces are candidates for the adsorption of dyes. In this study, good growth of UiO-66-SO3H crystals on the surface of nylon-6 fibers was achieved based on the idea of in situ growth. UiO-66-SO3H with a sulfonic acid group was successfully introduced into nylon-6 electrostatic spinning fiber, and the UiO-66-SO3H@nylon-6 membrane with high specific surface area and a three-dimensional mesh structure was obtained, which effectively solved the problems of clogging of the equipment, difficulty in being separated and recovered from the water, the possible secondary pollution of the water environment caused by the powder form of the MOF material, etc. The UiO-66-SO3H@nylon-6 membrane has a good adsorption capacity for rhodamine B (RhB), and the experimental data are consistent with the pseudo-second-order kinetic model and Langmuir model, which shows that the adsorption is a spontaneous heat absorption process. Pore-filling, hydrogen bonding, π–π interactions, and electrostatic attraction induced by –SO3H are the adsorption mechanisms of RhB on this adsorbent. In conclusion, the UiO-66-SO3H@nylon-6 membrane is an adsorbent capable of rapid adsorption of RhB and can be easily separated from water for recovery, regeneration, and utilization. This study may provide ideas for the application of MOFs in the field of pollutant removal.
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