Journal of Water Process Engineering
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2022
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IF 7.34
Jian Zhang,Yue Zhao,Maoxin Yang,Hong Jiang,Bing Wang,Yanping Jia,Weihua He
The abuse of doxycycline hydrochloride (DOX) in animal husbandry and its incomplete treatment have led to serious environmental problems, especially the risk of bacterial resistance. As an efficient, simple, and non-polluting method of catalysis, electrocatalysis has many advantages, which has attracted extensive attention in the removal of antibiotic pollutants in wastewater. Hence, the Ni/MWCNTs-OH/Ti composite electrode was prepared by galvanostatic electrodeposition to electrocatalyze DOX, and then the electrode was observed and analyzed by SEM , XRD and XPS. The optimal conditions (MWCNTs-OH was 0.10 mg/L, the concentration of NiSO 4 was 75 mmol/L, the degradation current was 15 mA, NaCl was present at a concentration of 0.20 mol/L, and pH value of 4) for degradation of 30 mg/L DOX within 60 min were determined by controlling variables. The degradation process of DOX followed Langmuir-Hinshelwood quasi-first-order reaction kinetics. As a result of stable the electrode, DOX removal rate was consistently above 70 % after 10 continuous uses, which showed good stability and reusability. The composite electrode electrocatalyzed DOX under the synergistic effect of cathode and anode. To identify the main intermediates involved in the electrochemical degradation of DOX, LC-MS was used. The toxicity of the intermediate products and final products was compared and analyzed by microbial culture experiment. And then Ecosar 2.2 was used to predict the biotoxicity of main intermediates to fish, daphnid, and green algae . This work provides a new material for the environmental remediation of antibiotic pollution.
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Journal of Energy Storage
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2022
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IF 8.907
Xiaolin Sun,Kai Zhao,Zhiqiang Liu,Zhonghan Feng,Zihao Wang,Liang Cui,Jingquan Liu
The construction of cost-effective, efficient, and sustainable energy storage systems is extremely important for future fuels globally. Nickel borates display important characteristics in electrochemical catalytic applications, whereas few reports have focused on their energy storage properties in supercapacitors . Herein, Ni 3 (BO 3 ) 2 nanospheres (NSs) are fabricated on titanium (Ti) mesh to afford Ni 3 (BO 3 ) 2 NSs@Ti using a simple and scalable electrodeposition technique, whose electrochemical performance is carefully studied. The Ni 3 (BO 3 ) 2 NSs@Ti obtained at 1.2 V (Ni 3 (BO 3 ) 2 NSs-1.2V) exhibits a higher specific capacitance of 663 F g −1 with a current density of 0.5 A g −1 . Furthermore, by directly employing Ni 3 (BO 3 ) 2 NSs-1.2V as the positive electrode and activated carbon as the negative electrode , an asymmetric supercapacitor (ASC) device can be fabricated and displays the energy density up to 30.6 Wh kg −1 at the power density of 400 W kg −1 . Hence, the facile electrodeposited Ni 3 (BO 3 ) 2 NSs can be a potential platform for energy storage applications .
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
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IF 7.926
Chunying Dong,Yuang Pang,Yan Chen,Zhan Gao,Meiqiang Cai,Micong Jin,Zongsu Wei
Sludge based catalysts (SBCs) has been considered as a promising and viable approach to sludge reclamation. Herein, we fabricated bimetallic Fe-Ti doped SBCs via a facile synthesis with sludge containing polyacrylamide (PAM) as N-precursor. The adsorption capacity and degradation efficiency of as-synthesized SBCs were assessed using tetracycline (TC) as a target pollutant, in which PAM in sludge played a dual role by promoting porosity, active sites, and structural defects beneficial for persulfate (PS) activation. Fe-Ti doping induced the activation of PS by a fast redox cycle of Fe 3+ /Fe 2+ associated with the coexistence of Ti 4+ /Ti 3+ , which enabled an efficient electron transfer between the catalyst and PS. The synergistic effect of PAM-derived N doping and Fe-Ti bimetals resulted in prevention of iron leaching and enhanced catalyst stability over a wide pH range. The surface SO 4 •− was the primary oxidant in the TC degradation process based on free-radical quenching experiments, and degradation pathways of TC were proposed given the intermediate evidence from UPLC-HRMS analysis. This study promotes the reclamation of PAM-containing sludge providing an eco-friendly and efficient process to activate PS for wastewater treatments .
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Zhen Huang,Chao Xiong,Lingri Ying,Welong Wang,Shixing Wang,Jing Ding,Jianfeng Lu
Lead ions in water have notorious effects on humans and environment. It is important to design an adsorbent with high adsorption capacity and reproducibility for efficiently removing Pb (II)ions from polluted water. Here, a novel Ti-based MOFs material (BDB-MIL-125(Ti)@Fe 3 O 4 ) was prepared by modifying NH 2 -MIL-125(Ti) with sulfhydryl and amino groups. Due to the large number of active sites, the maximum Pb (II) adsorption capacity of BDB-MIL-125(Ti)@Fe 3 O 4 was 710.79 mg/g at 25 °C and pH = 6 within 120 min corresponding to a maximum removal rate of 95.68%. The adsorbent also has extremely high selectivity and good cycling adsorption performance. The adsorption isotherms and kinetics agree with the Langmuir and the pseudo-second-order models, indicating that the process was chemisorption . Thermodynamic studies prove that spontaneous processes enhance Pb (II) adsorption at higher temperatures. DFT and FMOs calculations were used to discuss the adsorption mechanism. The sulfhydryl groups on the surface of organic ligands have a stronger affinity for Pb (II).
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PubMed
高影响因子
ACS Applied Polymer Materials
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2022
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IF 4.855
Zheng Zhang,Ting Li,Xuhui Zhang,Jing Huang,Bihua Xia,Jie Jiang,Mingqing Chen,Weifu Dong,Yang Wang
The increased demand for environmental protection and sustainable development has promoted the progress of renewable and biodegradable materials, especially in the field of packaging and agriculture. Such a status makes poly(butylene adipate-co-terephthalate) (PBAT) a kind of popular polyester material with an expanded utilization rate for its good mechanical properties and processability. However, a poor barrier property and light aging resistance are always the core issues during application. In order to overcome these shortcomings, Ti–dopamine (TiDA) nanoparticles were synthesized by hybridizing dopamine and a titanium precursor, resulting in a mixed phase of rutile and brookite, which was highly beneficial to light resistance. When TiDA was blended with PBAT at a low concentration (0.5–2.0 wt %), the PBAT composite films showed a great comprehensive performance. While maintaining good mechanical properties (tensile strength over 30 MPa and strain over 800%), the water vapor permeability was reduced by nearly 40%. The UV light of all wave bands could be blocked mostly by PBAT/TD composite films, which also had enhanced aging resistance, retaining over 20 MPa tensile strength and almost 100% strain after aging with UV radiation for 100 h. In summary, the PBAT/TD film material was promising for potential production in the field of agriculture and packaging.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Huachang Jin,Xuejiao Zhang,Yang Yu,Xueming Chen
The extensive evaporation-induced aggregation of scale inhibitors in the wastewater of recirculating cooling systems causes severe environmental pollution . In this study, Amino Trimethylene Phosphonic Acid (ATMP), an ordinary scale inhibitor, was degraded via electrochemical oxidation using a multi-layered Ti/IrO 2 -RhO x -TiO 2 /α-PbO 2 /β-PbO 2 electrode. The electrochemical oxidation experimental results verified the superior electro-catalytic properties of the β-PbO 2 electrode. Accelerated lifetime tests suggested that Ti/IrO 2 -RhO x -TiO 2 /α-PbO 2 /β-PbO 2 possesses a service lifetime of 201 h under a current density of 40000 A/m 2 , which is 3.4–100.5 times as long as other β-PbO 2 electrodes reported by other researchers. Four major operational parameters, namely electrolyte, current density, initial ATMP concentration, and pH, were discovered to significantly affect the ATMP degradation rate and electrical efficiency. The direct oxidation mechanism predominated in the degradation process of ATMP, achieving a 55.11% and 38.82% removal efficiency in Na 2 SO 4 and NaCl solutions, respectively. In addition, two possible degradation pathways of ATMP were proposed: induced by the breaking of either C-P or C-N bonds.
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CERAMICS INTERNATIONAL
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2022
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IF 5.532
Wei Zhou,Minghe Cao,Hongye Wang,Hua Hao,Zhonghua Yao,Hanxing Liu
The miniaturization of electronic components requires materials with colossal permittivity. In this work, titanium-powder-doped TiO 2 ceramics with colossal permittivity and a low dielectric loss over a wide range of frequency and temperature were successfully prepared using a solid-state reaction in an Ar atmosphere. TiO 2 ceramics with 2% Ti powder doping had the highest permittivity (110,000) and the lowest dielectric loss (0.029) at 1 kHz and room temperature. Systematic defect analysis showed that Ti 4+ was successfully reduced to Ti 3+ through doping with Ti metal powder. Further, oxygen vacancies were created in the high-temperature inert atmosphere, which promoted the formation of defect clusters with T i 3 + − V o ″ − T i 3 + as the core. Polarization and local confinement of the defect clusters resulted in the colossal permittivity and low dielectric loss. Therefore, this work provides necessary information and novel ideas for the design of correlated defects in colossal permittivity materials.
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JOURNAL OF CHEMICAL RESEARCH
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2022
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IF 1.097
Ying Wang,Fei Du,Chunyan Wang,Jiaqiang Zhao,Haizhu Sun,Chuanyin Sun
High-performance hierarchical cheese-like C-ZSM-5 nanocrystals are successfully prepared by acid–base treatment and are evaluated for oxidative desulfurization of dibenzothiophene. The acid–base treatment can generate a large number of Si-OH bonds and an open-mesoporous structure, which is conducive for the dispersion of TiO2 and also for the transport of dibenzothiophene and its oxidation products simultaneously. The catalytic results indicate that the hierarchical cheese-like C-ZSM-5 nanocrystals are highly active catalysts for the oxidative desulfurization of dibenzothiophene due to open mesoporosity. Complete conversion was obtained within 80 min at 338 K. The excellent performance is due to the large number of active framework sites and open mesopores generated by post-processing.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Beibei Liu,Baoyu Gao,Kangying Guo,Jingwen Pan,Qinyan Yue
Safe and effective coagulants are necessary for surface water treatment. The polyaluminum-titanium chloride (PATC) composite coagulant has promise but its application is limited due to the lack of fundamental theoretical research. We prepared a series of novel PATCs and investigated the effects of the interaction between Al (III) and Ti (IV) on the chemical species distribution, physicochemical properties and coagulation efficiencies. The Al-O-Ti bonds observed in the PATC infrared spectra were predicted by density functional theory computation to appear in 4-atom rings in the structure. The differences in Al species distribution of PATC and PAC illustrated that the introduction of Ti retarded the hydrolysis of monomeric Al species (Al a ) and medium polymerized Al species (Al b ) to colloidal Al species (Al c ) at low B levels, but the transformation was promoted at high basicities (B). PATCs exhibited higher charge densities and larger molecular weights than PAC at the same B levels, which contributed to their excellent coagulation efficiencies. PATC with low B values but high Al/Ti molar ratios mainly provided charge neutralization in removal of humic acid kaolin, while the dominant coagulation mechanism converted from charge neutralization to sweeping and bridging effects at high B values or low Al/Ti molar ratios.
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Frontiers in Energy Research
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2021
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IF 4.008
Li Jiayi,Zhou Wei,Huang Yuming,Gao Jihui
Replacing the oxygen evolution reaction (OER), which is of high energy consumption and slow kinetics, with the more thermodynamically favorable reaction at the anode can reduce the electricity consumption for hydrogen production. Here we developed a lignin-assisted water electrolysis (LAWE) process by using Ti/PbO2 with high OER overpotential as the anode aimed at decreasing the energy consumption for hydrogen production. The influence of key operating parameters such as temperature and lignin concentration on hydrogen production was analyzed. Compared with alkaline water electrolysis (AWE), the anode potential can be decreased from 0.773 to 0.303 (V vs. Hg/HgO) at 10 mA/cm2 in LAWE, and the corresponding cell voltage can be reduced by 546 mV. With increasing the temperature and lignin concentration, current density and H2 production rate were efficiently promoted. Furthermore, the anode deactivation was investigated by analyzing the linear sweep voltammetry (LSV) and cyclic voltammetry (CV) tests. Results showed that the anode deactivation was affected by the temperature.
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INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2023
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IF 3.6
Mengxian Zhang,Xianrui Zhao,Junting Zhang,Zhigang Fang,Huan Xu,Hongtao Wang
TiB 2 reinforced Ti(C,N)-based cermet was produced by the reaction spark plasma sintering of Co, Ni, Ti, C, BN, Mo 2 C, WC, and TaC mixtures. To understand the mechanism of reaction sintering, systematic investigation on the microstructure evolution and displacement variation rule was carried out. In addition, the influence of C/BN molar ratio on the microstructures and performances of cermet was investigated. Except an initially increased pressure, three densification patterns were found. The first method was the Co Ti, Ti Ni, and Ti-BN diffusion reactions, resulting in a shrinkage of 22.06%. The second pattern was the viscous flow and dissolution-reprecipitation, which corresponded to the synthesis of Ti(C,N) and TiB 2 . In this process, the shrinkage ratio was increased by 35.62%. The final densification mainly originated from the viscous flow of metallic binder. It contributed to the transformation of macrovoids into microvoids, and an increased displacement of 30.10%. With the increasing of C/BN ratio, more C atoms diffused into Ti(C,N). Furthermore, core/rim structure-Ti(C,N) and coreless (W,Mo,Ta,Ti)(C,N) were fabricated. However, the microvoids in cermets enhanced. As a result, the hardness and fracture toughness first increased and then decreased. Results from this work are helpful to understand the reaction spark plasma sintering technique, and can enrich the preparation method of cermet.
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Water Resources and Industry
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2023
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IF 5.1
Yonghao Zhang,Yating Song,Liu Liu,Jie Zhang,Zhaoyi Zhang,Qian Li,Jing Yang,Wen Li,Lulu Huang,Xue Li,Yulei Zhang,Qiangshun Wu,Xuejie Guo
In this study, porous Ti/Magnéli Ti 4 O 7 nanotube arrays (NTA) was fabricated to pretreat antibiotic wastewater. Characterization of the Ti 4 O 7 -NTA illustrated that highly ordered NTA was successfully generated on the porous Ti substrate, which enlarged the specific surface area by 1.67 times. The Ti 4 O 7 -NTA has a high oxygen evolution potential (2.60 V) as well as low interfacial charge transfer resistance (4.479 Ω cm −2 ). Ceftriaxone sodium (CRO) was completely removed from raw antibiotic wastewater after 3 h of treatment by the Ti 4 O 7 -NTA, under optimal operation conditions. The biodegradability and toxicity of the wastewater were also significantly enhanced and reduced, as the BOD/COD and EC 50,48h values were increased to 0.48 and 57.62 % ± 2.16 %, respectively. The possible degradation pathway of CRO was proposed by LC‒MS. Cathodic polarization was proven to be an effective way to ensure the long-term durability of the Ti 4 O 7 -NTA.
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