Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Ye Zhishu,Zhang Chenxing,Xiong Shuchang,Yao Yuming,Zhang Na,Xie Shiwei
In this study, a novel composite particle electrode was fabricated by anchoring antimony-doped tin oxide (ATO) nanoparticles onto a carbon black/polytetrafluoroethylene (CB-PTFE) matrix to construct a continuous-flow 3D electro-oxidation system for tetracycline (TC) degradation. Characterization results confirmed the formation of a hierarchical porous structure with uniformly distributed rutile ATO crystals, which provided abundant active sites. Under optimized conditions (CB:ATO mass ratio of 1:1, voltage of 10.5 V, pH of 3.65, and HRT of 16.67 min), the system achieved a remarkable TC removal efficiency of 98.19%, significantly outperforming the pristine CB-PTFE and 2D control systems. Mechanistic investigations via radical scavenging experiments revealed a dual-pathway mechanism, where the degradation was driven by the synergistic coupling of reactive oxygen species (primarily O 2 · − and · OH) and a robust direct electron transfer (DET) process on the electrode surface. Furthermore, the particle electrodes exhibited excellent mechanical and chemical stability, maintaining approximately 77% degradation efficiency after 24 h of continuous-flow operation. This work provides a promising strategy for designing high-performance 3D electrodes and offers theoretical insights into the complex oxidation mechanisms in antibiotic wastewater remediation.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Kuan Wang,Xue Jiang,Xin-Peng Li,Zhe Cao,Zhen-Hong He,Weitao Wang,Huan Wang,Xiaojuan Lai,Zhao-Tie Liu
The electrocatalytic reduction of carbon dioxide (CO2) to methane (CH4) represents a promising strategy for carbon utilization, however, achieving high selectivity and efficiency remains a significant challenge. Herein, a copper foil-based catalyst with abundant interfaces was synthesized through electrodeposition to achieve Sb and F dual doping on the copper surface (CuSbF-ED), enabling efficient methane production through pulsed CO2 electrolysis. Under the pulsed electrolysis condition, the CuSbF-ED catalyst achieved a remarkably high CH4 Faradaic efficiency of approximately 92.6% and a partial current density of 60.3 mA•cm-2 at an overpotential of -1.2 V vs RHE, representing significant advancement over the static electrolysis performance of pristine copper foil. The in situ infrared spectroscopy results revealed an enhanced coverage of key intermediates *CHO on the CuSbF-ED surface during pulsed electrolysis. Theoretical calculations further confirmed that the CuSbF-ED structure with Sb and F dual doping stabilizes *CO intermediates and promotes the formation and adsorption of *CHO intermediates. Under the pulsed electrolysis conditions, the stabilized Cu species on CuSbF-ED surface facilitate the further conversion of adsorbed *CHO and *CH2O intermediates by deep hydrogenation processes toward high CH4 selectivity. The present research highlights Sb-F dual doping combined with pulsed potential electrolysis as a promising approach for the efficient and selective electroreduction of CO2 to CH4, contributing to sustainable carbon management
研究领域:
材料科学
·
电化学
·
环境科学
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WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 8
·1-12
·
IF 3.8
Li Qi,Zhu Yanping,Liu Yanbiao,Chen Xiaoguang,Jiang Nan,Yan Mengying,Li Xuhua,Xing Haoyu,Bao Yinzhou,Huang Manhong
Antimonate (Sb(V)), sulfate and acid orange 7 (AO7) are common pollutants in printing and dyeing wastewater. Currently, there have been no reports about the effects of sulfate and AO7 on Sb(V) removal by anaerobic granular sludge (AnGS). In this study, the Sb(V) removal and Sb(Ш) accumulation was revealed in presence of sulfate and AO7, and the role of adding granular activated carbon (GAC) was investigated. Results showed that sulfate inhibited Sb(V) removal by AnGS (S + Sb, k = 0.101). GAC alleviated the inhibition of sulfate on Sb(V) removal and Sb(V) removal rate increased by 1.9 times (GAC + S + Sb, k = 0.187). Meanwhile, GAC promoted sulfate reduction by AnGS. AO7 inhibited sulfate reduction, thereby alleviating the inhibition of sulfate on Sb(V) removal, and Sb(V) removal rate increased by 1.5 times (S + Sb + dye, k = 0.147). When Sb(V), sulfate and AO7 coexisted, adding GAC actually inhibited Sb(V) removal (GAC + S + Sb + dye, k = 0.067), which may be due to GAC promoted the reduction of sulfate and AO7 by AnGS. The microbial community analysis revealed that Acinetobacter genus was related to Sb(V) reduction, with higher relative abundance in GAC + S + Sb (49.4%) and S + Sb + dye groups (28.9%). These results provided guidance for anaerobic treatment of printing and dyeing wastewater. Graphical Abstract
研究领域:
环境科学
·
微生物学
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Nanomaterials
·
2023
·Vol. 13
·期 2
·257
·
IF 5.3
Junze Zhang,Hanwen Xu,Zhuanghao Zheng,Cong Wang,Xinru Li,Fu Li,Ping Fan,Yue-Xing Chen
For thermoelectric thin film, the substrate plays an important role during the growing process and produces effects on its thermoelectric properties. Some special kinds of substrates provide an optimal combination of influences on both the structure and thermoelectric properties. In this work, Bi-Sb-Te films are deposited on Si substrates with different initial orientations by magnetron sputtering in two ways: with and without a pre-coating process. The preferred orientations of the Bi-Sb-Te films are greatly affected by the substrates, in which the thin film tends to deposit on Si substrate with (100) initial orientation and high (015)-texture, while the (00l)-textured Bi-Sb-Te film easily deposits on Si substrate with (110) initial orientation. The experimental and theoretical calculation results indicate that Bi-Sb-Te film with (00l)-texture presents good electrical conductivity and a higher power factor than that of film with (015)-texture.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Dingping Huang,Yanlin Li,Jia Lei,Xiaofang Feng,Xiaotong Yang,Rong He,Rui Zhang,Hongyuan Wei,Wanjun Mu,Huanhuan Liu,Wenkun Zhu
The selective separation of 90 Sr from its daughter 90 Y is crucial for obtaining carrier-free 90 Y. Herein, we demonstrate a La doping strategy to modulate the microstructure and surface properties of Sb 2 O 5 to enhance the separation performance of Sr/Y. Batch studies show that 7%-LaSb exhibits significantly enhanced separation performance compared to Sb 2 O₅ across a broad range of HNO₃ concentrations, achieving a remarkable separation factor of 3449 for Sr 2+ in 0.3 M HNO₃. The equilibrium isotherms align with the Langmuir model, yielding a maximum Sr 2+ adsorption capacity of 40.82 mg/g for 7%-LaSb. Column experiments further validate the practical efficacy of Sr 2+ separation from Y 3+ -containing streams. Mechanistic studies indicate that the high separation performance is attributed to the changes in surface microenvironment induced by La doping: (i) defect-rich porous pathways for Sr 2+ ion access, (ii) a more electronegative surface for enhanced Sr 2+ attraction, and (iii) abundant active Sb-OH sites for specific ion-exchange. This work provides a promising new adsorbent for the separation of Sr/Y in strong acid environments.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 57
·120030-120043
·
IF 5.8
Zhou Chuchen,Wan Lei,Lou Zimo,Wu Shuang,Baig Shams Ali,Xu Xinhua
Elevated Sb(V) concentration in textile wastewater is a growing environmental concern worldwide and has received wider attention in recent years. Iron oxides possess appealing characteristics as efficient and cost-effective adsorbents in large-scale applications. In the present study, Sb(V) adsorption capacity of α-Fe 2 O 3 , γ-Fe 2 O 3 , and Fe 3 O 4 was compared under experimental conditions close to the practical textile wastewater treatment. Results demonstrated that α-Fe 2 O 3 performed better under different pH values, reaction times, dye compounds, and co-existing ions as compared to γ-Fe 2 O 3 and Fe 3 O 4 , and the adsorption equilibrium was achieved within 8 h. Sb(V) adsorption is found to be highly pH dependent, and higher removal was achieved in lower pH, indicating the involvement of electrostatic interactions. The pH pzc value of α-Fe 2 O 3 was 7.15, which favored Sb(V) adsorption in practical wastewater having neutral pH value (pH ~ 7). Pseudo-first- and pseudo-second-order described the data and the simulated values of q e fitted well with the experimental values, indicating that pseudo-second-order model described the adsorption kinetics better with R 2 (> 0.95) higher than of pseudo-first-order plots. The Langmuir and Freundlich models both described well the sorption data of all the adsorbents, where the R 2 values were > 0.90 with a better fit in the Freundlich model for α-Fe 2 O 3 , suggesting that the adsorbent has heterogeneous surface characteristics. Similarly, characterizations revealed that the specific surface area, pore volume, and hydroxyl group content in α-Fe 2 O 3 were higher than others, making it easier for contaminants to bind on to the active sites. Furthermore, the effect of dyes and co-existing anions on Sb(V) adsorption was negligible, except for SO 4 2− , CO 3 2− , and PO 4 3− by the formation of inner-sphere complexes with iron oxides through competitive adsorption with [Sb(OH) 6 ] − . Findings from the present study suggested that α-Fe 2 O 3 effectively reduced Sb(V) in textile wastewater and could be a promising alternative for practical textile wastewater treatment. Graphical Abstract
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PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Qiang Bi,Yifei Sun,Bo Yang,Yilin Zhao,Zekun Zhang,Juanqin Xue
Electrochemical advanced oxidation technology produces hydroxyl radicals and has no secondary pollution, making it one of the most promising technologies for treating organic pollutants in industrial wastewater. Nevertheless, low energy efficiency and short lifetime are the key issues hindering the widespread application of electrodes. In this study, TiC nanoparticles were uniformly dispersed in the deposition solution, and the Ti/Sb-SnO 2 electrode was prepared by sol electrodeposition , after calcination , a porous double-layer structure was formed, which improved the catalytic performance and effectively delayed the penetration of industrial wastewater into the electrode. Compared with the Ti/Sb-SnO 2 electrode, the electrode life is increased by nearly 6 times, the phenol removal rate reaches 90.64 % (2000 mA/cm 2 , 1 mol/L H 2 SO 4 ), the oxygen evolution potential of 2.13 V, a current density of 0.096 A/cm 2 , a charge transfer resistance of 2.245 Ω. The results show that the porous structure is conducive to providing a larger specific surface area and contact area for the reaction, maximizing the utilization of catalytic active sites, shortens the mass transfer distance between the hydroxyl radicals and pollutants, increases the degradation rate, reduces the corrosion rate of the electrode materials, and improves electrode stability. The unique double-layer structure is obviously different from traditional electrodes, adding a layer of protective barrier, which provides a new idea for prolonging the life of electrodes. The electrode prepared in this study has a simple process, a greatly improved lifespan and an excellent energy utilization rate, which is suitable for industrial application.
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CHEMOSPHERE
·
2023
·
IF 8.8
Guobo Li,Yaping Zhang,Peng Wu,Kai Shen,Shule Zhang,Shipeng Ding
The synergistic degradation of VOCs and NO x that were emitted from the incineration of municipal and medical wastes by a single catalyst is challenging, due to the poor activity at low temperatures, and the SO 2 poisoning on the active sites. Herein, N-doped TiO 2 (N–TiO 2 ) was used as the support for designing a highly efficient and stable catalyst system for CB/NO x synergistic degradation even in the presence of SO 2 . The prepared SbPdV/N–TiO 2 catalyst, which presented excellent activity and tolerance to SO 2 in the CBCO + SCR process, was investigated by a series of characterizations (such as XRD, TPD, XPS, H 2 -TPR and so on) as well as DFT calculations . The electronic structure of the catalyst was effectively modulated after N doping, resulting in effective charge flow between the catalyst surface and gas molecules. More importantly, the adsorption and deposition of sulfur species and reaction transient intermediates on active centers were restrained, while a new N adsorption center for NO x was provided. Abundant adsorption centers and superior redox properties ensured smooth CB/NO x synergistic degradation. The removal of CB mainly follows the L-H mechanism, while NO x elimination follows both E-R and L-H mechanisms. As a result, N doping provides a new approach to develop more advanced anti-SO 2 poisoning CB/NO x synergistic catalytic removal systems for extensive applications.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Weichen Zeng,Han Zhang,Rui Wu,Luming Liu,Guibai Li,Heng Liang
This study focused on the preparation, characterization, and sulfamethoxazole (SMX) removal performance of the SnO 2 -coated reactive electrochemical membrane (REM). This REM was fabricated by loading SnO 2 on the reduced TiO 2 nanotube arrays (RTNA)-based Ti membrane (TM). Regarding the dopant for SnO 2 , Sb was more effective in boosting the electrocatalytic activity than Bi, and the energy consumption for Sb-SnO 2 -coated REM (TM/RTNA/ATO) was lower than Bi-SnO 2 -coated REM (TM/RTNA/BTO). As for the internal layer, RTNA provided TM/RTNA/ATO with more electroactive surface areas and prolonged the service lifetime. Compared with batch mode, the SMX removal efficiency in flow-through mode was increased up to 8.4-fold. The SMX degradation performances were also affected by fluid velocity, current density, initial SMX concentration, and electrolyte concentration. The synergistic effects of • OH oxidation and direct electron transfer were responsible for the effective removal of SMX. TM/RTNA/ATO was proved to be stable and durable by multi-cycle and accelerated lifetime tests. Its extensive applicability was verified with high removal efficiencies of SMX in the surface water and wastewater effluent. These results demonstrate the promise of TM/RTNA/ATO for water treatment applications.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Yiyin Guan,Wenjie Liu,Shixiang Zuo,Xiangyu Yan,Jingyi Ni,Chao Yao,Fengqin Wu
Firstly, Sb–SnO 2 /potassium titanate (Sb–SnO 2 /K 4 TiO 4 (KTO)) was fabricated by a sol-gel method, and then TiO 2 nanorod arrays were grown on the surface of Sb–SnO 2 /KTO by a hydrothermal method (TiO 2 NRA/Sb–SnO 2 /KTO). The photocatalytic activity was evaluated by degrading tetracycline hydrochloride (TCH). The prepared samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), ultraviolet–visible diffuse reflectance spectrometer (UV–Vis), and X-ray photoelectron spectroscopic characterizations (XPS). The results show that the Z-scheme heterojunction formed between SnO 2 /KTO and TiO 2 can enhance the range of light response. With the doping of Sb, the conductivity of the composite is enhanced, which is advantageous to the transfer of electron and the low recombination rate of electron-hole pairs. Thus, the doping of Sb is effective to improve the photocatalytic performance. Our work demonstrates the optimal doping amount of Sb is 5%. The degradation efficiency of TCH concentration can reach 95.6% after 2 h and TiO 2 NRA/Sb–SnO 2 /KTO shows good reusability .
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 6
·e5612
·
IF 3.14
Na Zhang,Jiaqi Bu,Yong Meng,Jia Wan,Lu Yuan,Xin Peng
In this study, Ti-Si-Sn-Sb/GAC particle electrodes were prepared by sol–gel method. The particle electrodes were characterized by SEM, XRD, EDX, and BET then used to carry out three-dimensional (3D) electrocatalytic oxidation degradation on simulated refractory p-aminophenol (PAP) wastewater. The effects of initial pH, cell voltage, aeration flow rate and initial PAP concentration on degradation experiments were investigated. Under the optimal conditions, the PAP and COD removal rates were 89.45% and 75.17% respectively. In addition, the possible degradation mechanism of PAP was further investigated by UV–Vis and HPLC. Finally, it was found that the Ti-Si-Sn-Sb/GAC particle electrodes with high catalytic activity and excellent stability could significantly improve the PAP wastewater removal efficiency.
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JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Wei Jin,Rongrong Wang,Xirong Huang
The horseradish peroxidase (HRP) mediated synthesis of conducting polyaniline (PANI) was investigated in detail in the bicontinuous microemulsion stabilized by both sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and dodecyl sulfobetaine (SB-12). The addition of zwitterionic surfactant SB-12 not only reduces the phase inversion temperature of the anionic surfactant AOT stabilized microemulsion, but also enhances the catalytic performance of the solubilized HRP. Compared with the previously reported AOT/SDS stabilized bicontinuous microemulsion, the present AOT/SB-12 stabilized bicontinuous microemulsion is much more suitable for the expression of the catalytic activity of HRP; moreover, the conductivity of the resulting PANI improves greatly (a 15-fold increase in conductivity). The present results indicate further that the catalytic activity of HRP and its stability are crucial for the biosynthesis of PANI in bicontinuous microemulsions. To understand the underlying mechanism of the medium effects, electron spin resonance (ESR), UV–vis-NIR and small-angle X-ray scattering (SAXS) spectroscopies were used to investigate the effects of the oil-to-water ratio ( α ) and the surfactant concentration ( γ ) of the present bicontinuous microemulsion on the conductivity of resulting PANI. Results show that the bicontinuous microemulsion stabilized by both AOT and SB-12 still has a template role in the biosynthesis of PANI and the PANI conductivity is mainly determined by the microstructure of the template and by the microstructure-dependent activity and stability of the solubilized HRP. Lower α and γ values are beneficial to the enzymatic synthesis of high-quality PANI. The present study is of great help not only to deepen the understanding of the template role of anionic surfactant aggregates in the biosynthesis of conducting PANI, but also to develop new strategies for the biosynthesis of high quality PANI.
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