ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chengzhang Zhu,Yuting Wang,Zhifeng Jiang,Annai Liu,Yu Pu,Qiming Xian,Weixin Zou,Cheng Sun
Bi3TaO7 is a potential photocatalyst because of its high chemical stability, defective fluorite-type structure, and superior mobility of photoinduced holes. However, few studies have focused on the interfacial effects of Bi3TaO7-based photocatalysts. In this work, 0D Bi3TaO7 nanodot-hybridized 3D V and N codoped TiO2 nanoblock (B/VNT) composites were first synthesized for the photocatalytic removal of oxytetracycline hydrochloride, 2,4,6-trichlorophenol, and tetrabromobisphenol A. The fabricated B/VNT had a photocatalytic performance superior to that of pristine components, and probable degradation pathways were proposed according to the primary intermediates identified by a gas chromatography–mass spectrometer. Interestingly, on B/VNT, the transfer of interfacial electrons was observed from V/N–TiO2 to Bi3TaO7, and the formed built-in electronic field led to a direct Z-scheme structure, rather than type II, as confirmed by the generated •OH and •O2– radicals and band structures from the density functional theory calculation. Therefore, the strong interfacial electronic interaction on the B/VNT was significant, which drove faster photogenerated charge transfer, more visible-light adsorption, and active •OH and •O2– generation, thus improving the photocatalytic activity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Qingfeng Zhou,Yun Gong,Jianhua Lin
NiV 2 O 6 /C composites are prepared via a solid-state conversion process by low temperature (150 °C) annealing nickel‑vanadium-based coordination polymer , [Ni(phen)H 2 O][V 2 O 6 ]. The obtained NiV 2 O 6 /C nanoribbons are interconnected to form a sponge-like morphology, when the composites are first used as supercapacitor electrode, it exhibits a specific capacitance of 745.6 F g −1 at 0.5 A g −1 with a good rate capability of 520.0 F g −1 (69.7% retention) at 10 A g −1 (20-folds). The NiV 2 O 6 /C composite exhibits good cycling performance, the capacitance retentions at 6000th and 12000th charging/discharging cycles at 2 A g −1 are 81.5% and 77.8% relative to the original capacitances, respectively. The morphological and compositional changes of the NiV 2 O 6 /C composite electrode before and after 12,000 GCD cycles (two-electrode system) are carefully elaborated through a series of characterization (SEM, EDS , and XPS). Furthermore, the NiV 2 O 6 /C nanoribbons possess reversible electrochromism , which is probably related to the intervalence charge transfer (IVCT, V IV → V V ).
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2014
·
IF 1.922
Wei Yao,Pinhua Rao,Irene M.C. Lo,Wenqi Zhang,Wenrui Zheng
Pollutants that exist in anionic species are issues of concern in water treatment . Compared to cationic pollutants, the removal of anionic pollutants by adsorption is more difficult because most adsorbents carry predominantly negative charges in neutral and alkaline environments . In this study, a cross-linked chitosan derivative with quaternary ammonium and magnetic properties (QM-chitosan) was prepared and employed to remove chromium(VI) and phosphorus(V) (Cr(VI) and P(V)) from aqueous environments. The QM-chitosan was characterized by Fourier transform infrared spectrometry (FT-IR), thermogravimetric analysis (TGA), energy dispersive X-ray (SEM-EDX) and zeta potential . Batch experiments show that QM-chitosan can effectively remove Cr(VI) and P(V), and the main mechanism was believed to be electrostatic interaction. A pseudosecond-order model was fitted to describe the kinetic processes of Cr(VI) and P(V) removal. The adsorption isotherms of both Cr(VI) and P(V) on the QM-chitosan were well fitted by the Langmuir isotherm equation. The saturated adsorption capacity of P(V) (2.783 mmol/g) was found to be higher than that of Cr(VI) (2.323 mmol/g), resulting from the size of the H 2 PO 4 − ions being smaller than that of the HCrO 4 − ions. However, the theoretical calculation and experimental results showed that QM-chitosan had a stronger affinity for Cr(VI) than P(V). The adsorption–desorption of the QM-chitosan was evaluated, and high regeneration rates were demonstrated.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2013
·
IF 2.266
Tiantian Sheng,Shams Ali Baig,Yunjun Hu,Xiaoqin Xue,Xinhua Xu
The adsorptive removal of As(V) from aqueous solutions using iron-coated honeycomb briquette cinder (Fe-HBC) is presented. Low cost mechanical granulation process was integrated with surface amendment technology to prepare iron-oxide modified granular adsorbent for clean water production. Detailed characterizations were performed using FTIR, XRD, EDS and SEM techniques. Operating parameters including initial As(V) concentration, pH, contact time, adsorbent dose, iron leaching and the effects of competing ions on As(V) removal were evaluated. Results demonstrated that high amount of arsenate (961.5 μg g −1 ) was adsorbed at pH 7.5 in 14 h contact time. Langmuir, Freundlich and Temkin isotherm models were used to analyze the adsorption data, whereas Langmuir model was found to best represent the data with a correlation co-efficient ( R 2 = 0.999). Thus, As(V) sorption on Fe-HBC surface suggested monolayer adsorption and indicated surface homogeneity. Moreover, the dimensionless parameter ( R L ) value calculated to be about 0.118 that reiterated the process is favorable and spontaneous. The influences of competing ions on As(V) removal decreased in the following order:
PO 4 3 − > HCO 3 − > F − > Cl − . The profound inhibition effects of
PO 4 3 − revealed a high affinity toward iron(oxy) hydroxide. Life-cycle assessment confirmed that spent HBC is non-hazardous and can be used as a promising sorbent for arsenic removal.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Ting Zhang,Yaobin Ding,Heqing Tang
An efficient singlet oxygen generation system was first developed by using Bi(V)/Bi(III) composites for degrading organic pollutants . The composites were prepared by hydrolyzing NaBiO 3 in HCl solutions. As monitored by various techniques, it was found that the morphology and composition of the composites were able to be tuned by changing the molar ratio of HCl to NaBiO 3 in the preparation process, which was optimized at 2.0. Due to the efficient generation of singlet oxygen, the use of the composite (0.75 g L −1 ) resulted in almost complete degradation of bisphenol A (0.2 mmol L −1 ) in 20 min, with a pseudo-first-order kinetic constant of 0.14 min −1 . The dominant reactive species in the degradation system were confirmed to be singlet oxygen, which was generated from the release of the lattice oxygen in the composite. The good performances of the concerned singlet oxygen generation system are general for degrading different organic pollutants.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Kai Wang,Wenge Yang,Yonghong Hu,Yumei Kai,Ying Shi
A novel star-shaped monomer 1,3,5-Tri[2-(3,4-ethylenedioxythien-2-yl)vin-1-yl]benzene (TEDOT-V-B) was synthesized by Wittig coupling reaction. The copolymers with BEDOT-V at different feed ratios were prepared onto the ITO-coated glass by cyclic voltammetry (CV) method and the electrochromic properties were reported. The influences of different feed ratios on the spectroelectrochemical and kinetic properties were investigated. Spectroelectrochemical studies indicated that the maximum absorption wavelengths of the copolymer films bathochromically shifted with feed ratios. In addition, the copolymers had tunable and low band gaps. When the feed ratio of BEDOT-V-B/BEDOT-V was 1:3, the copolymer film showed the fastest oxidation switching time of 0.9s (567 nm) and 0.9s (967 nm) and the fastest reduction switching time of 0.8s (567 nm) and 0.9s (967 nm). Compared with PBEDOT-V, the copolymers showed tunable and multicolored electrochromism through feed ratios and the RGB colors were achieved. Additionally, the surface morphology of the copolymer film was investigated by scanning electron microscope (SEM).
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2016
·
IF 2.101
Dong Ri Zhang,Xuan Zhen Jin,Jing Hao Li
TiO 2 nanoparticles doped with 2.0 at.% Sc and 2.0 at.% V calcinated at temperatures of 500–800 °C were investigated by XRD technique. Results show that Sc doping promote the anatase-to-rutile phase transition compared to the pure TiO 2 , while V doping inhibit the anatase-to-rutile phase transition below 600 °C and then rapidly accelerated the anatase-to-rutile phase transition above 600 °C. However, the anatase-to-rutile phase transition is significantly inhibited by Sc V codoping until 750 °C. The M, И and Λ pattern evolutions of the average crystallite size of rutile with calcination temperature are found and two models are proposed for the findings.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2016
·Vol. 2
·期 11
·1600340
·
IF 0
Meng Wang,Zaiyu Wang,Wei Ma,Shan-Ci Chen,Qingdong Zheng
Despite the frequently renewed record high power conversion efficiencies (PCEs) in recent years, achieving single-junction polymer solar cells (PSCs) with both high PCE and large open circuit voltage ( V OC ) remains a challenge because there is a trade-off between high short circuit current density ( J SC ) and large V OC values. Here, the design and synthesis of a novel donor–acceptor (D–A) copolymer ( PIT2FBT ) based on an asymmetric-indenothiophene donor and a difluorinated benzo[c][1,2,5]thiadiazole acceptor is demonstrated. PIT2FBT exhibits a wide optical bandgap of 1.82 eV with a large ionization potential of 5.54 eV. Through systematic morphology control and device engineering, the best performance solar cell based on PIT2FBT shows a high PCE of 9.01% in combination with a large V OC of 1.0 V. To the best of our knowledge, the PCE is the highest for single-junction polymer fullerene solar cells with V OC s up to 1.0 V. At the same time, the influences of solvent additive on the active layer morphology together with the resulting device performance are investigated in-depth. These findings and detailed studies provide an important guidance to tune and optimize the morphology and photovoltaic properties of indenothiophene-based copolymers, which are promising candidates for short-wavelength absorbing materials in tandem PSCs.
✓ 已验证
产品关联
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Bin Zhang,Shuangqing Xia,Zhenyi Wang,Wenqian Li,Boda Li,Haochen Zhang,Yanjun Xin,Kai Wu,Jun Ma,Xu He
Permanganate [Mn(VII)] needs to be activated to improve its reactivity towards refractory organic contaminants in practice. Herein, visible light (VL) and graphitic carbon nitride (g-C 3 N 4 ) were introduced to enhance the activation of Mn(VII) for the first time. Sulfamethoxazole (SMX) can be degraded effectively by VL/Mn(VII)/g-C 3 N 4 system in neutral and alkaline environments. Different from conventional Mn(VII) activation and photocatalytic processes, the performance of VL/Mn(VII)/g-C 3 N 4 system in various real water samples was superior than Milli-Q water. Mn(V) was found to be the dominant active species responsible for SMX degradation. Photo-induced electron (e cb – ) of g-C 3 N 4 under VL irradiation was proved to be the initiator of Mn(VII) activation. Density functional theory calculations revealed the strong affinity of g-C 3 N 4 for Mn(VII), which can resist the interference of water substrates on the Mn(VII) activation process by photo-induced e cb – . This work deepens the understanding of reactive manganese intermediates in the Mn(VII) activation system.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Biao Yuan,Pan Wu,Changjun Liu,Jian He,Wei Jiang
Arsenate As(V) and arsenite As(III), known for their high toxicity and carcinogenic potential, pose significant threats to environmental and soil health, an efficient arsenic removal technology is urgently needed. In this work, a novel class of zirconium-based adsorbent (AHZOs) was synthesized via the Sol-Gel method, exhibiting a unique nanostructured morphology with low crystallinity and a high density of active hydroxyl groups with a specific surface area of 216.4 m 2 /g. The AHZOs demonstrated remarkable adsorption capacities of 240.7 mg/g for As(III) and 230 mg/g for As(V), with removal efficiencies strongly influenced by pH value. Thermodynamic analysis revealed that the adsorption process was spontaneous and endothermic. Through comprehensive characterizations and theoretical calculations, the adsorption mechanisms were elucidated, revealing a combination of chemical reactions and hydrogen bonding interactions. This work not only presents a highly efficient adsorbent for arsenic removal but also provides a new design strategy for targeting other environmental pollutants, highlighting its significant potential for practical applications in environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhiquan Xiang,Chunkai Huang,Jincan Huang,Yan Yan,Guangbing Liu,Xuemin Yu,Weijing Liu,Haijin Cao,Aozhan Liu
Herein, the synergistic removal of Sb(Ⅲ) and Sb(Ⅴ) from wastewater by polymeric ferric sulfate (PFS) and the oxidation process were investigated. The results showed that PFS exhibited superior performance on Sb(Ⅲ) removal in terms of coagulant dosage, applied pH, and anti-interference properties than Sb(V) removal. For the Sb liquid in pure water matrix (Sb=1000 μg/L), when the dose was 60 mg/L and the final pH was 5.0, the independent removal of Sb(Ⅲ) and Sb(V) was 95% and 90%, respectively. Meanwhile, Sb(Ⅲ) removal in the PFS coagulation system remained stable within a wider pH range (pH=3–9). Sb(Ⅲ) could be preferentially removed in the solution column and had an inhibitory effect on the adsorption of Sb(V). Sb(Ⅲ) was also partially oxidized to Sb (V) during the coagulation process, which was influenced by the coagulant dosage and the solution pH. The results of the actual printing and dyeing wastewater (PDW) treatment indicated that the pre-reduction of Sb(V) to Sb(Ⅲ) could significantly increase the total Sb removal from 72.0% to 97.5%. The characterization results, such as Zeta potential and x-ray photoelectron spectroscopy (XPS), indicated that the Sb(Ⅲ) removal by PFS was achieved mainly through chemical adsorption. While the Sb(V) removal was realized by both chemical adsorption and electrostatic adsorption, the electrostatic adsorption contributed more than the chemical adsorption. This study provides a new idea for understanding the synergistic removal of Sb(Ⅲ) and Sb(V) using PFS in PDW advanced treatment.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhijie Zhu,Juan Tang,Xinxin Ma,Caihong Wang,Chengyi Sun,Yuqing Hu,Zhaoxian He,Xianfeng Du,Xu Chen
This study investigated the effect of different-polarity aqueous ethanol solutions on the formation of V -type starch originating from corn starch. Scanning electron microscopy revealed that the morphology of starch transformed from a random lamellar structure to a granular structure with decreasing solution polarity. When the ethanol concentration increased from 40 % to 60 %, the crystallinity and single-helix ratio of V -type starch increased from 9.66 % and 6.90 % to 29.77 % and 12.84 %, respectively. When the ethanol concentration was 100 %, the aforementioned parameters decreased to 21.31 % and 11.07 %, respectively. The crystallinity and curcumin encapsulation efficiency of the V -type starch reached their maximum values when this starch was prepared using 60 % aqueous ethanol. Furthermore, curcumin release experiments indicated that the produced starch–curcumin complex could resist gastric acid, and V -type starch with higher crystallinity exhibited a better sustained release effect in intestinal fluid. These results indicate that the formation of V -type starch can be finely regulated using aqueous ethanol solutions with different polarities, and such regulation is beneficial for the application of V -type starch in the oral delivery of guest molecules.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）