Materials
·
2025
·Vol. 18
·期 7
·1550
·
IF 3.2
Ke Wang,Weifeng Li,Yumei Long
As an environmentally friendly and clean energy technology, solar-driven interfacial evaporation technology has attracted wide attention. However, organic pollutants can easily pollute distilled water during the evaporation of wastewater. In this work, we report a strategy of N-TiO2/C solar absorption with a low bandgap (2.33 eV), excellent light absorption ability, and high photothermal conversion efficiency (48.2%). Black N-TiO2/C was prepared by the sol-gel method in the presence of hexamethylenetetramine as a source of nitrogen and carbon. The simultaneous N doping and C with superior photothermal effect rapidly increased the surface temperature of the material, reduced the recombination rate of electrons and holes, and improved the photocatalytic activity, showing great potential for solar thermal energy conversion. The prepared solar absorbent and polyurethane (PU) were mixed evenly to form a porous N-TiO2/C/PU (NTCP) foam for purifying water. The evaporator produced clean water at a rate of 1.73 kg m−2h−1under the simulated sunlight of 1 sun irradiation. Meanwhile, the evaporator simultaneously photodegraded methylene blue (MB) and rhodamine B (RhB) underwater at a removal rate > 90%. The bifunctional solar water evaporation device combining photocatalytic and photothermal effects holds great potential for water purification.
研究领域:
环境科学
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·085020
·
IF 1.449
Hexi Zhao,Yan Wu,Hui Nan,Yonglong Du,Guijun Yang,Gang Wang,Huiyuan Chen,Haomin Wei,Hong Lin
TiO2-ZnO, TiO2-Fe2O3, TiO2-NiO binary heterojunction nanocomposites were synthesized by hydrothermal method using tetrabutyl titanate (TBT) as titanium source. Phase composition, microscopic shape ,functional group characteristics and optoelectronic properties of samples were characterized by x-ray diffractometry (XRD), transmission electron microscopy (TEM), photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), cyclic voltammetry(CV),electrochemical impedance spectra(EIS) and Tafel polarization curve(Taf). The photocatalytic properties of TiO2, TiO2-ZnO, TiO2-Fe2O3 and TiO2-NiO were analyzed by the ability of degradation of methyl orange under visible light irradiation. The experimental results show that the binary heterojunction nanocomposites have been successfully constructed to promote the separation of photogenerated electron-hole pairs and improve the photoelectric performance. The photocatalytic results show that TiO2-NiO exhibits the best photocatalytic performance due to the difference in light utilization efficiency and charge transfer characteristics, which is consistent with the charge transfer resistance of TiO2 > TiO2-ZnO > TiO2-Fe2O3 > TiO2-NiO in EIS results. At the same time, the degradation kinetics of methyl orange (MO) in TiO2-NiO binary heterojunction nanocomposites under visible light irradiation is faster than other samples that can be completed in 160 min. The results show that TiO2-NiO binary heterojunction nanocomposites have broad application prospects in water treatment and wastewater treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xiaoyu Zhong,Linyang Li,Wenhao Xiang,Chuanbao Xiao,Nianbing Zhong,Quanhua Xie,Dengjie Zhong,Yunlan Xu,Haixing Chang,Shih-Hsin Ho
Herein, a highly stable and efficient photoelectrocatalytic system was developed for the rapid degradation of tetracycline . The photoelectrocatalytic system comprised two Ag/N-doped TiO 2 nanotube photoanodes, a bipolar membrane, and a P–Pd cathode. The Ag/N-doped TiO 2 nanotube photoanodes were coupled with a P–Pd cathode to enhance the hydroxyl free radical (·OH) generation at the cathode surface. The bipolar membrane can separate tetracycline pollutants and degradation products from the photoanodes, which can minimize the contamination of the photocatalyst by tetracycline or products, thereby enhancing the repeatability and stability of the photoelectrocatalytic system. photoelectrocatalytic uses ultraviolet–visible light as the input energy for the effective removal of tetracycline and total organic carbon . The initial pH in the cathode and photoanode chambers was 7.0. The Na 2 SO 4 concentration in the photoanode chamber and the addition amount of H 2 O 2 were 0.2 M and 4% (v/v), respectively. Under these conditions, 100 mL of 100 mg/L tetracycline was completely degraded within 60 min, and 82.3% total organic carbon was removed within 5 h. The pseudo-first-order reaction rate constant of the Ag/N-doped TiO 2 nanotube with 0.15 M Ag was 0.0637 min-1, which was 12 times higher than that of N-doped TiO 2 nanotube. The mechanisms underlying·OH generation and the tetracycline degradation pathway were also elucidated. The photoelectrocatalytic system, which is an eco-friendly and low-energy system, exhibits excellent stability and reliability toward tetracycline and total organic carbon degradation and significantly aids the development of wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry B
·
2023
·Vol. 17
·期 3
·695-701
·
IF 1.4
Wang Y.,Dong X.,Jiang B.,Dai X.,Song H.
Abstract An alternative route to synthesize Ni 2 P–N/TiO 2 in N 2 atmosphere instead of H 2 atmosphere by thermal treatment method was proposed, and the Ni 2 P–N/TiO 2 catalyst was investigated in benzofuran hydrodeoxygenation (BF HDO) performance. X-ray diffraction (XRD), transmission electron microscope (TEM), N 2 -adsorption specific surface area measurements, CO uptake and X-ray photoelectron spectroscopy (XPS) were used to characterize the catalysts. The results showed that, the Ni 2 P–N/TiO 2 catalyst possessed a smaller and highly dispersed Ni 2 P particles on the catalysts showed a higher benzofuran hydrodeoxygenation conversion (91.9%) and ethylcyclohexane selectivity (70.4%).
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 118
·97320-97329
·
IF 3.84
Zhenjiang Yu,Yuanyuan Zhao,Bing Gao,Xuyang Liu,Liming Jia,Fangbo Zhao,Jun Ma
To improve the anti-biofouling properties of membranes, Ag-embedded nano-sized titanium dioxide (Ag-n-TiO2) particles were utilized as biocidal agents to modify polyvinyl chloride (PVC) membranes. Both Ag-n-TiO2/PVC flat sheet membranes and reinforced hollow fiber membranes were fabricated by a phase inversion method with varying Ag-n-TiO2 particle concentrations. As a result, the hydrophilicity, permeability, and retention capability increased with Ag-n-TiO2 concentrations from 0 to 1.5 wt%. In addition, the in situ antibacterial and anti-formation of biofilm properties of the modified membranes were greatly enhanced in the conventional inhibition zone test, Escherichia coli (E. coli) absorption experiment, fluorescent staining experiment, as well as long-term continuous biofouling test. The best results were obtained for the PVC membrane modified by 1.0 wt% Ag-n-TiO2. The optimized membrane presented not only better permeability and in situ antibacterial properties in the E. coli adhesion test, but also an enhancement in resisting biofilm formation and a more steady permeation flux in long-term filtration than the unmodified membrane.
研究领域:
材料科学
·
环境工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2022
·Vol. 7
·期 40
·e202203024
·
IF 2.307
Xuehui You,Fang Liu,Guofei Jiang,Shuhua Chen,Beiya An,Rongli Cui
Graphical Degradation experiments of TC suggested that SCN/NT-2@PTFE composites showed the best photocatalytic performance under the optimal conditions, the degradation rate of tetracycline reached 99 % after 120 min of irradiation. The preparation of SCN/NT-2@PTFE composite membrane can solve the problem of difficult recovery and secondary contamination of powder catalysts. Herein we synthesized S-g-C 3 N 4 and N−TiO 2 catalysts by hydrothermal and calcination technologies and SCN/NT@PTFE membrane by a vacuum filtration method. The morphology and composition of the synthesized materials were analyzed by different characterization methods (SEM/HRTEM/XRD/XPS/UV-vis et.). The effects of different catalysts, pollutant concentrations, mass of catalyst and pH on the photo-degradation of tetracycline were investigated. The degradation rate of tetracycline by SCN/NT-2@PTFE membrane was as high as 99.9 % after 2 h of illumination. This was mainly because heterogeneous structure between S-g-C 3 N 4 and N−TiO 2 broadened the light absorption range and suppressed the carrier complex. Superoxide radicals (⋅O 2 − ) were proved to play a dominant role in the degradation reaction. After 20 days of stirring in water, the photocatalytic performance of membrane decreased slightly, demonstrating its good stability. The study of SCN/NT-2@PTFE membrane provides a new direction for the development of photocatalysis and membrane.
研究领域:
环境科学
·
材料科学
·
化学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Zhou Yanwen,Cai Feng,Li Wei,Qiu Jian,Xu Liang,Liu Qianyu,Zhang Yinlong
The post-treatment of recycling the fine photocatalyst nanoparticles restricts their application. In this study, a new photocatalytic material was synthesized by immobilizing the N-doped TiO2 and graphene oxide (GO) composite on polypropylene (PP) (N–TiO2/GO/PP) fibre sheet, and characterized based on X-ray diffraction spectroscopy (XRD), Raman spectroscopy and Scanning Electron Microscope (SEM). The photocatalytic activity was evaluated using roxithromycin (ROX) as a typical antibiotic pollutant. XRD, Raman spectra and SEM images proved that N–TiO2/GO/PP fibre sheet was successfully synthesized. The photocatalytic degradation of 10 mg L−1 ROX can reach up to 90% and the degradation rate constant was 0.2299 h−1 in surface water with the application amount of TiO2/GO/PP fibre sheet of 24.6 cm × 2.7 cm and reaction time of 9 h under the irradiation of simulated sunlight. The application amount of TiO2/GO/PP fibre sheet, initial concentration of ROX and water matrix significantly affect the degradation of ROX. A low concentration of natural organic matter (NOM) slightly promoted the degradation of ROX, while a high concentration of NOM significantly inhibited the degradation of ROX. Alkaline condition (pH 8–9) is favourable for the photocatalytic degradation of ROX by TiO2/GO/PP fibre sheet. The photocatalytic reactivity of the TiO2/GO/PP fibre sheet showed no significant decrease after three runs. Two primary degradation products of ROX were identified and they showed lower ecotoxicity than ROX. The results demonstrate that the new synthesized TiO2/GO/PP fibre sheet shows promising application prospects in the treatment of antibiotics in wastewater and surface waters.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Kunpeng Liu,Nan Wang,Jianhua Li,Fanglin Du,Baorong Hou,Ruiyong Zhang
Electrochemical two-electron water oxidation reaction (2e − WOR) to produce H 2 O 2 has been widely concerned. However, four-electron competition reaction causes the large overpotential and low production rates of 2e − WOR, which restrict its’ development and application. Herein, we prepared N-TiO 2 derived from NH 2 -MIL-125 by the hydrothermal combined with calcination method. We found that N-TiO 2 as photoanode exhibited the well properties of photoelectrocatalysis water oxidation, which gave an overpotential of 630 mV at 1 mA cm −2 . The overpotentials of N-TiO 2 was approximately 130 mV (at 1 mA cm −2 ) lower than NH 2 -MIL-125, and even lower than the previous reported TiO 2 , which may attribute to the increased oxygen vacancy with the calcination process and N doping. In addition, we investigated the degradation performance of the prepared catalysts to degrade methylene blue by photoelctrocatalysis on-site the preparation of H 2 O 2 . It was shown that N-TiO 2 performed high degradation efficiency (∼91%) and excellent stability. The possible mechanism was speculated due to the increased oxygen vacancy and N doping. This work provides a new idea for photoelectrocatalysis water oxidation materials and points out a new way for on-site H 2 O 2 production for direct use.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Jiaojiao Jiang,Zipeng Xing,Meng Li,Zhenzi Li,Junwei Yin,Junyan Kuang,Jinlong Zou,Qi Zhu,Wei Zhou
Plasmon Ag decorated 3D urchinlike N-TiO 2−x photocatalysts are successfully synthesized by a facile hydrothermal treatment (180 °C) and combined with a photo-deposition approach, followed by a reduction treatment. The results show that the resultant Ag/N-TiO 2−x sample possesses a three-dimensional (3D) urchinlike nanostructure with high crystallinity of anatase. Meanwhile, it exhibits the narrow optical band gap (Eg ∼ 2.61 eV) and the excellent visible-light-driven photocatalytic performance. Moreover, the hydrogen generation rate and photocatalytic degradation rate of phenol are up to 186.2 μmol h −1 g −1 and 97.7% under visible light irradiation, which are about 4.2 and 5.4 folds greater than that of N-TiO 2 . The mechanism of photocatalytic process is also proposed, and the enhanced photocatalytic property is mainly due to the synergistic reaction of the Ti 3+ and N codoping, which narrows the band gap and favors the utilization of visible light, and the plasmon effect of Ag nanoparticles and unique 3D urchinlike architecture, which are propitious to the separation and transmission of photogenerated carriers.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Nanoscience
·
2020
·Vol. 10
·期 12
·4415-4426
·
IF 2.88
Duan Jihai,Pan Peng,Xue Kang,Zhao Hui,Zhang Zisheng,Wang Weiwen
B-C-N-TiO 2 catalysts with intermediate band gap and heterojunction were prepared by sol–gel method. The crystal structure, elemental composition, and absorbance performance were analyzed by XRD, XPS and UV–vis DRS. Due to the formation of the continuous intermediate band gap in the forbidden band, the optical absorption boundary of B-C-N-TiO 2 catalyst extends to 412 nm, which shows different red shift compared with that of TiO 2 (397 nm), N-TiO 2 (400 nm), B-TiO 2 (402 nm) and C-TiO 2 (403 nm).Meanwhile, the B-C-N-TiO 2 catalyst is a uniform spherical solid particle with exposed (101) and (211) planes. The degradation efficiency of B-C-N-TiO 2 catalyst to methylene blue(MB) was up to 97.82% after 3 h under visible light, which shows different degree of improvement compared with that of TiO 2 (34.8%), N-TiO 2 (79.09%), B-TiO 2 (87.82%) and C-TiO 2 (73.19%). B-C-N-TiO 2 has good stability, and there was still more than 95% degradation efficiency after three degradation cycles. It is also revealed that the incorporation of B-C-N element affects the crystal phase of the catalyst and promotes the generation of heterophase surface heterojunction between (101) and (211). It has certain guiding value for co-doping modification of three elements.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Qiao Li,Yang Huang,Zhong Pan,Jiancong Ni,Weiqiang Yang,Jianhua Chen,Ying Zhang,Jianmin Li
Novel hollow C, N-TiO 2 @C surface molecularly imprinted microspheres (HCNTC-SMIPs) with hydrophilicity, reusability, and selectivity were synthesized. The core–shell hollow structure yields large specific surface areas, high surface-to-volume ratios and effective diffusion rate on both inner and outer exposed surfaces. The C, N-TiO 2 shell possesses high photo-catalytic decomposition capacity toward the specific pollutants. Moreover, TiO 2 acts not only as a photocatalyst but also as a double cross-linker agent of molecularly imprinted to significantly reduce the molar ratio of formaldehyde. The hydrophilic surface imprinted layer provides the recognition sites and specific pore structures. The results showed that HCNTC-SMIPs possessed a high specific surface area of 305.10 m 2 g −1 and a good visible light harvesting property with a bandgap of 1.67 eV. This could efficiently suppress the photoelectron-hole recombination, and thereby heightening the photocatalytic degradation of sulfadiazine (SDZ). The photodegradation efficiency of HCNTC-SMIPs can reach 99.25 % within 140 min and 90.00 % after 6 cycles. The HCNTC-SMIPs had a higher kinetic constant (0.01815 min −1 ) than those of HCNTC (0.00964 min −1 ) and TiO 2 (0.00548 min −1 ). HCNTC-SMIPs can achieve targeted and efficient SDZ removal, as well as in-situ regeneration. The possible degradation pathways of SDZ primarily includes smiles-type rearrangement, SO 2 extrusion, ring hydroxylation, direct oxidation and S N bond cleavage processes based on LC-MS analysis.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 33
·5481-5490
·
IF 3.117
Liruhua Zhang,Qianhong Shen,LiXing Yu,Feilong Huang,Changteng Zhang,Jiansong Sheng,Fang Zhang,Di Cheng,Hui Yang
A novel Bi2MoO6/N–TiO2 hierarchical heterostructure photocatalyst was successfully fabricated through the in situ growth of Bi2MoO6 nanosheets on rough N–TiO2 nanorods with a bark-like surface, and the structure–property relationship of this composite material was researched. The results show that the unique bark-like morphology of N–TiO2 leads to superior adsorption ability, and also provides effective growth sites for Bi2MoO6 nanosheets. The growth of Bi2MoO6 nanosheets leads to the formation of a hierarchical structure, therefore increasing the adsorption ability. The heterostructure between Bi2MoO6 and N–TiO2 promotes the highly efficient separation and transfer of photogenerated carriers. These features make the Bi2MoO6/N–TiO2 composite photocatalyst exhibit outstanding photocatalytic activity, and the optimal photocatalytic degradation rate for tetracycline hydrochloride (20 mg L−1) is up to 93.76% in 90 min under weak-visible-light irradiation (5 W, LED, λ > 400 nm). After five cycling runs, the composite photocatalyst still maintains high photocatalytic activity. Holes and superoxide radicals are confirmed to be the main reactive species in the photocatalytic reaction over the Bi2MoO6/N–TiO2 composite photocatalyst.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）