Journal of Water Process Engineering
·
2024
·
IF 6.3
Ruizhen Liu,Huaiyuan Jiang,Ping Li,Jianfei Yin,Zhengrui Xu,Xiaoyu Chen,Jian Cheng,Shuangxi Gu,Renliang Lyu
Antibiotic pollution has posed environmental risks, and the crucial point lies in the elimination efficiency of antibiotics from wastewater. Herein, a ternary-structured B-TiO 2 /Bi 2 S 3 /PCs (photonic crystals) film, in which B-TiO 2 was a blend of anatase and rutile crystalline phases, was fabricated to evaluate the efficiency of antibiotic photodegradation under visible light irradiation. The synthesized B-TiO 2 (80 %)/Bi 2 S 3 /PCs(458) film exhibited superior photocatalytic efficiency of tetracycline hydrochloride (TC), with a degradation rate 7.56 times greater than that of pristine B-TiO 2 . These findings are closely related to the excellent photoelectron separation of the heterojunction between B-TiO 2 and Bi 2 S 3 , as well as the bandgap reflection effect and light localization effect of the PCs . Notably, the B-TiO 2 (80 %)/Bi 2 S 3 /PCs(458) film also displayed favourable degradation performance for ofloxacin (OFLX) and ciprofloxacin (CIP), with degradation rates of 83.98 % and 72.79 %, respectively. Active species trapping experiments and electron spin resonance (ESR) measurements revealed superoxide radicals (•O 2 − ) and photogenerated holes (h + ) as the main active species. Furthermore, potential photodegradation pathways were proposed by analyzing the degradation intermediates of TC and OFLX via liquid chromatography-mass spectrometry (LC–MS). In a word, the B-TiO 2 (80 %)/Bi 2 S 3 /PCs(458) film exhibited high efficiency in the treatment of antibiotic pollutants, thereby offering promising prospects for practical application.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
iScience
·
2025
·
IF 4.1
Hong Qian,Binxia Yuan,Yuhao Liu,Li Wang,Rui Zhu,Pengyu Dong
TiO 2 has low photocatalytic activity due to its easy recombination of photogenerated charges and low visible light utilization efficiency. This study utilized the keto-enol tautomerism principle of fructose in an alkaline environment to successfully obtain Cu 2 O/TiO 2 (CT), Cu 2 O/TiO 2 /Cu (CTC), and TiO 2 /Cu (TC) catalysts. As Cu(I) transformed into Cu(0), the bandgap narrowed, significantly enhancing visible light absorption. Photocatalytic tests showed that CT-0.15 exhibited the highest hydrogen production rate (279.53 μmol g −1 h −1 ), which was 25.18 times higher than that of TC-2. However, CTC-1 had the highest CO production rate (10.58 μmol g −1 h −1 ). Optoelectronic test revealed that CT-0.15 and CTC-1 had higher separation efficiency of photogenerated exciton. Density functional theory (DFT) calculations indicated that the change in the valence state of Cu influenced the reaction mechanism, with CT being favorable for the adsorption of H + in HER and CTC promoting the adsorption of CO 2 in carbon dioxide reduction reaction (CO2RR).
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
PROGRESS IN ORGANIC COATINGS
·
2017
·
IF 2.858
Xian-Wei Cheng,Jin-Ping Guan,Xu-Hong Yang,Ren-Cheng Tang
This research work reported a novel approach to develop flame retardant silk fabric using naturally occurring phytic acid (PA) rich in phosphorus and TiO 2 nanoparticles through a pad-dry-cure technique. A polycarboxylic acid [1,2,3,4–butanetetracarboxylic acid (BTCA)] was employed to stabilize and improve the adhesion of TiO 2 on silk surface. The flame retardancy of the treated silk fabric was determined in terms of limiting oxygen index, vertical burning, and pyrolysis combustion flow calorimetry, and the durability of flame retardancy to washing was discussed. PA and TiO 2 were found to have a joint flame retardant effect. The combination of PA, TiO 2 and BTCA was able to endow silk fabric with excellent flame retardancy, and the good flame retardant ability was kept even after 25 times of washing. The reasons for the good washing durability of the treated silk fabric were discussed. Finally, a significant condensed-phase flame retardant mechanism of the silk fabric treated with the PA/TiO 2 /BTCA system was revealed by the analyses of thermogravimetry and pyrolysis combustion flow calorimetry.
研究领域:
纺织科学
·
材料科学
✓ 已验证
DOI
高影响因子
Environmental Technology & Innovation
·
2020
·
IF 3.356
Vu Thi Quyen,Le Thi Thu Ha,Dang My Thanh,Quyet Van Le,Nguyen Minh Viet,Nguyen Thi Nham,Phan Quang Thang
Advanced synthesis of nanoflower structures consisting of TiO 2 @Ti 3 C 2 nanoflowers with three-dimensional (3D) porous frameworks from two-dimensional (2D) Ti 3 C 2 MXene was done and applied for degradation of organic pollutant. The special structure of material was created by the in situ transformation, starting from Ti 3 C 2 T x MXene as provision of Ti source. The basis properties of material were characterized by SEM, TEM , XRD and XPS. The Ti 3 C 2 T x MXene showed layered structure and then this morphology was replaced by nanoflower spheres with rapid growth of TiO 2 @Ti 3 C 2 nanowhiskers. In terms of application, the TiO 2 @Ti 3 C 2 heterojunction showed an extraordinary photocatalytic efficiency toward Rhodamine B (RhB) compared to performances of pristine Ti 3 C 2 , and commercial TiO 2 . In addition, the TiO 2 @Ti 3 C 2 composite also displays the good recyclability even after 5th degradation cycles. Based on the finding, it gains a deeper insight into practical applications of 2D transition metal carbide for treatment of organic pollutants in wastewater.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Jia Li,Huizhu Zhang,Dongxue Yu,Weie Wang,Wei Song,Libin Yang,Xin Jiang,Bing Zhao
Considering the variable valence characteristics of rare earth elements, they can be in a variety of valence forms coexistence. Doping of rare earth element with different valence states may produce different energy levels to tune the semiconductor energy band structure. We utilize rare earth element Ce doping TiO 2 for the development of high-performance semiconductor surface-enhanced Raman scattering (SERS) substrates based on an energy-level tuning strategy. Ce doping not only forms multiple energy levels including Ce 3+ and Ce 4+ metal doping energy levels in the bandgap of TiO 2 , but also enriches the surface state level of TiO 2 itself, which together promote the separation of photogenerated carriers and improve charge transfer efficiency between substrates and absorbed molecules. This endows TiO 2 semiconductor substrate with a higher SERS enhancement factor, which can reach 2.2 × 10 6 . The detectable concentration of methylene blue can be as low as 10 −10 mol/L. Moreover, the semiconductor substrate exhibits excellent uniformity and stability. This study not only provides a new strategy to develop excellent semiconductor SERS substrate with multiple energy levels, but also lays the foundation for promising practical application of semiconductor substrate.
研究领域:
材料科学
·
表面增强拉曼散射
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Yang Fan,Ke-Jing Huang,De-Jun Niu,Chun-Peng Yang,Qiang-Shan Jing
TiO 2 -graphene nanocomposite was prepared by hydrolysis of titanium isopropoxide in colloidal suspension of graphene oxide and in situ hydrothermal treatment. It provides an efficient and facile approach to yield nanocomposite with TiO 2 nanoparticles uniformly embedded on graphene substrate. The electrochemical behavior of adenine and guanine at the TiO 2 -graphene nanocomposite modified glassy carbon electrode was investigated. The results show that the incorporation of TiO 2 nanoparticles with graphene significantly improved the electrocatalytic activity and voltammetric response towards these species comparing with that at the graphene film. The TiO 2 -graphene based electrochemical sensor exhibits wide linear range of 0.5–200 μM with detection limit of 0.10 and 0.15 μM for adenine and guanine detection, respectively. The excellent performance of this electrochemical sensor can be attributed to the high adsorptivity and conductivity of TiO 2 -graphene nanocomposite, which provides an efficient microenvironment for electrochemical reaction of these purine bases.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2019
·
IF 5.026
Peng Mei,Huihui Wang,Han Guo,Ning Zhang,Sailun Ji,Yapeng Ma,Jiaqi Xu,Ying Li,Hamed Alsulami,Mohammed Sh Alhodaly,Tasawar Hayat,Yubing Sun
A new photocatalyst of TiO 2 /C 3 N 4 composite (TiO 2 /g-C 3 N 4 ) was synthesized by the hydrothermal method. The characterization showed that TiO 2 /g-C 3 N 4 extended absorption light range and enhanced generation efficiency of photo-induced electron. Under the simulated solar irradiation, the photodegradation rate of bisphenol A (BPA) by TiO 2 /g-C 3 N 4 was twice as fast as that of g-C 3 N 4 . Furthermore, TiO 2 /g-C 3 N 4 presented the good stability and excellent selectivity for BPA degradation. The high degradation rate of BPA by TiO 2 /g-C 3 N 4 was demonstrated to be superoxide radical (·O 2 − ) and singlet oxygen ( 1 O 2 ) by radical quenching experiment, which was further evidenced by EPR, XPS, DRS and PL analysis. These findings revealed that TiO 2 /g-C 3 N 4 can be used as a potential photocatalyst for removing organic pollutants in actual environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 5
·3010-3015
·
IF 1.483
Li Rong,Liu Jia,Jia Yuefa,Zhen Qiang
Photocatalytic degradation performance of oxytetracycline (OTC) was investigated in aqueous solution using Fe2O3–TiO2 nanopowders under UV and visible light, respectively. Compare with pure TiO2, the Fe2O3–TiO2
nanopowder had improved photocatalytic activity under visible light, while had a bit decrease under UV light. Photoluminescence (PL) spectrum measurement, ·OH radical test and trapping experiments were carried out to investigate the photocatalytic mechanism. Under UV light, photogenerated
electrons–holes can transfer from TiO2 to the conduction band and valence band of Fe2O3, respectively, and further participated in the degradation of OTC, thus both O2·− and holes are the main active species in this case. Under
visible light, Fe2O3 was activated and yield charge carriers, then the photogenerated electrons immigrated to the trapping site of TiO2, the photogenerated holes accumulate in the valence band (VB) of Fe2O3 was the major active species
reacted with OTC.
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
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Wenjia Wang,Youtong Xu,Xiaoxiao Wang,Bokun Zhang,Wenying Tian,Jinglai Zhang
Hydrothermal liquefaction (HTL) of microalgae Nannochloropsis (NAS) over various transition metal M/TiO 2 (M = Fe, Co, Ni, Mo, and Mn) was investigated. Ni/TiO 2 was the most effective catalyst to improve the yield and quality of biocrude and the liquefaction conversion. Ni/TiO 2 was characterized by XRD, XRF, and XPS. The research of Effect of reaction temperature on HTL of NAS over Ni/TiO 2 suggested that 300 °C led to a maximum biocrude yield of 48.23% and the highest liquefaction conversion of 89.28%. Adding Ni/TiO 2 catalyst reduced the viscosity and provided more light-fraction in biocrude while brought a slight increase in total acid number (TAN). Gas chromatography-mass spectrometry (GC-MS) analysis demonstrated that adding Ni/TiO 2 considerably changed the composition of biocrude and the possible pathways were discussed. Reproduction test showed the Ni/TiO 2 has an excellent reproduction ability in HTL of NAS.
研究领域:
能源生物学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 16
·11595-11606
·
IF 2.993
Wu Keliang,Dong Xuejun,Zhu Junfang,Wu Pengcheng,Liu Chang,Wang Yixi,Wu Jianning,Hou Juan,Liu Zhiyong,Guo Xuhong
The nanostructured heterojunction photocatalysts are considered promising in photocatalytic reduction in the carbon dioxide. Herein, we demonstrate a simple sol–gel and hydrolysis process to design nanostructured TiO 2 /ZnO heterojunction, by using the biological template celery stalk. The nanostructured photocatalyst consists of anatase TiO 2 and wurtzite ZnO nanoparticles. A well-connected heterojunction, with uniformly distributed nanoparticles, on the pores and folds of celery stems, is obtained. The enhanced specific surface area of 55.5 m 2 /g is achieved. The crystal structure, morphology and surface composition are investigated by electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Furthermore, we demonstrate the photocatalytic performance of as-synthesized nanostructure TiO 2 /ZnO heterojunction. The photocatalytic yield, of CO 2 reduction into CH 4 , exhibits a five times increase, from 0.55 to 2.56 µmol h −1 g −1 , for the nanocomposite as compared to the pure TiO 2 . This enhanced performance corresponds to the efficient charge transfer and hindrance in the recombination of electron–hole pairs due to the optimum band positions of ZnO and TiO 2 . This study demonstrates the potential of using biotemplates to design efficient photocatalysts to convert CO 2 into useful solar fuels.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
光催化
·
可持续能源
✓ 已验证
DOI
高影响因子
Particuology
·
2023
·
IF 3.5
Peiyi Yan,Ying Zhang,Shili Zheng
Hydrolysis of TiCl 4 solution is capable of preparing microscale TiO 2 particles. This research studied the synthesis of microscale spherical TiO 2 powders and the hydrolysis kinetics. The effects of the flow field generated by different agitators and baffles in the crystallizer, the initial free acid concentration, the initial equivalent TiO 2 concentration, and the temperature on the hydrolysis progress and powder morphology were systematically studied. The results show that the flow field in a crystallizer can significantly affect the morphology and particle size of the powders, and the axial flow can improve the sphericity of the powders. The increased free HCl and equivalent TiO 2 concentrations in the pregnant solution inhibit the forward hydrolysis reaction, prolong the time to reach equilibrium, and reduce the yield. An appropriate temperature matching the compositions of the pregnant solution is crucial for the powder morphology and size. Powders with sizes ranging from around 5 μm–40 μm can be tuned under controlled flow field, solution compositions, and temperature conditions. In addition, the Cheng and Wunderlich modified Avrami equation was used for the crystallization kinetic modeling. The effects of the free HCl concentration, equivalent TiO 2 concentration, and hydrolysis temperature are reflected in the reaction rate constant and active nuclei reduction index. Increasing the free HCl and equivalent TiO 2 concentrations will reduce the reaction rate constant and accelerate the deactivation of the active nuclei, thus increasing the final powder size, while increasing the temperature will lead to the opposite results.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2015
·
IF 0
Yin Yan Ding,Bi Xu,Feng Yan Ge,Zai Sheng Cai
In this work, self-cleaning cotton fabrics were prepared based on the TiO2-SiO2-Polydimethylsiloxane (PDMS) composites. TiO2-SiO2 composites were synthesized by depositing TiO2 nanocrystals onto preformed porous SiO2 and PDMS was used to enhance the linkage between TiO2-SiO2 composites and cotton fabrics. The TiO2-SiO2-PDMS composites coated cotton fabrics show superhydrophobicity with a water contact angle of 157°because of the abundant of methyl groups and hierarchical roughness features of the coated cotton fabrics. Meanwhile, the TiO2-SiO2-PDMS composites coated cotton fabrics display photocatalytic property, which were analyzed based on the removal and degradation of rhodamine B (RhB) under ultraviolet light. Abrasion resistance test indicates that the coating possesses a good mechanically durability.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）