MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Kang Jing,Sen Chen,Qianru Shi,Luping Lu,Hui Liu
Ag@Ti 3 C 2 -TA nanocomposite catalyst was elaborately constructed by a simple and green method with Ti 3 C 2 as the carrier, tannic acid (TA) as the modifier, and silver nitrate as the precious metal precursor. A series of characterizations were used to analyze morphology and microstructure of the resulting catalyst. The degradation behaviors of the catalyst were studied with rhodamine B (RB) and methyl orange (MO) as the model dyes. The result demonstrated that Ag@Ti 3 C 2 -TA exhibited efficient catalytic degradation performance toward both RB and MO, and the degradation percentage increased with the growth of TA content in the catalyst. The catalytic degradation process conformed to the quasi-level kinetic model, and catalytic reaction rate constants of Ag@Ti 3 C 2 -TA for RB and MO were 0.972 and 1.478 min −1 , respectively. The catalytic degradation percentage of Ag@Ti 3 C 2 -TA toward RB and MO still remained above 80% even after 10 catalytic cycles, indicating high degradation percentage and considerable catalytic stability.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 6
·期 1
·015403
·
IF 1.151
Caoning Zhang,Chenhui Liu,Lingling Xu,Nan Wu
Mesoporous bioactive glass with the mole ratio of 60SiO2:36CaO:4P2O5 was prepared using acetic acid (HAc-M58S) and hydrochloric acid (HCl-M58S). The HAc-M58S exhibits high drug-loading capacity and longer drug-release time. The drug-release performance of the HAc-M58S and HCl-M58S were studied by loading them with silver and then releasing the silver into simulated body fluid. The results showed that the specific surface area, pore volume, and average pore size of the HAc-M58S were 221.6 m2 g−1, 0.45 cm3 g−1, and 8.5 nm, respectively, all of which were superior to HCl-M58S (203.4 m2 g−1, 0.36 cm3 g−1, and 7.2 nm, respectively). Furthermore, the silver-loading capability of the HAc-M58S was 19%, which corresponded to an increase of about 31% over that of HCl-M58S. In addition, the release rate of the HAc-M58S was 0.82%, which is lower than that of the HCl-M58S, at 1.07%. The zones of inhibition of the silver-loaded HCl-M58S and HAc-M58S had an average size of 10.57 mm and 12.26 mm, respectively. In-vitro bioactivity tests revealed that the HAc-M58S exhibited good biological activity. Therefore, the HAc-M58S, given its higher silver-loading capacity and longer silver-release time, is a promising candidate drug carrier.
研究领域:
材料科学
·
生物医学工程
·
药学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2014
·Vol. 7
·期 2
·784-797
·
IF 6.739
Zhifeng Jiang,Wei Wei,Danjun Mao,Cheng Chen,Yunfei Shi,Xiaomeng Lv,Jimin Xie
Silver-loaded nitrogen-doped yolk–shell mesoporous TiO2 hollow microspheres (Ag-N-TiO2-YSM) were prepared by employing acetic acid as the hollowing controller and triethanolamine as the N source for the first time. Ag nanoparticles (NPs) were uniformly deposited by a simple in situ photo-reduction method, which can prevent the aggregation of Ag NPs. The efficiency of the as-prepared samples was investigated by monitoring the degradation of rhodamine B and ciprofloxacin under visible light irradiation. The experimental results indicate that N-doped yolk–shell mesoporous TiO2 hollow microspheres show higher photocatalytic activity than P25 TiO2 under visible light irradiation because of N doping and the unique yolk–shell structure. In addition, Ag-N-TiO2-YSM shows enhanced activity compared with N-TiO2-YSM due to the SPR absorption of silver NPs and the fast generation, separation and transportation of the photogenerated carriers. Moreover, the Ag contents can affect the photocatalytic activity of the Ag-N-TiO2-YSM composite. A suitable amount of Ag deposition gives the highest photocatalytic activity. A higher loading does not improve the photocatalytic activity of N-TiO2-YSM further. The active species generated in the photocatalytic system were also investigated. Based on our experimental results, a possible photocatalytic mechanism was proposed. The strategy presented here gives a promising route towards the development of delicate metal@hollow semiconductor composites for many applications in photocatalysis.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Feihui Li,Ruiru Zhao,Bingye Yang,Wei Wang,Yu Liu,Jianping Gao,Yunlan Gong
Nowadays, energy shortage is one of the major problems in the world. Photocatalytic hydrogen production is a new type of energy technology with good application prospect. As a new type of photocatalytic semiconductor material, g-C 3 N 4 has attracted much attention as a photocatalyst . By ultrasonic treatment of a mixed solution of g-C 3 N 4 and bovine serum albumin, followed by adding a certain amount of silver nitrate solution and then directly hydrothermal treatment , a special dandelion-like g-C 3 N 4 /Ag (D-g-C 3 N 4 /Ag) was prepared. The scanning electronic microscopy, transmission electronic microscopy , X-ray diffraction, Fourier transform infrared, fluorescence and physicochemical adsorption methods were used to characterize the morphology and structure of D-g-C 3 N 4 /Ag. In addition, the photocatalytic H 2 production of D-g-C 3 N 4 /Ag with different Ag loadings or in different sacrificial agents and different pH conditions were investigated. The results indicated that when triethanolamine was used as sacrificial agent, photocatalytic hydrogen efficiency was the best, and the rate of photocatalytic hydrogen production reached 862 μmol g −1 h − 1 as the Ag loading was 4%.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Yiqun Zhang,Jihao Bai,Linsheng Zhou,Deye Liu,Fengmin Liu,Xishuang Liang,Yuan Gao,Fangmeng Liu,Xu Yan,Geyu Lu
Hedgehog-like titanium dioxide (TiO 2 ) architectures composed of hundreds of one-dimensional (1D) nanorods and silver (Ag) loaded TiO 2 with different amounts (0.2 at%, 0.5 at% and 1 at%) were successfully prepared by facile hydrothermal process and simple isometric impregnation route. The high electron mobility of 1D nanorods on the surface of TiO 2 and the high porosity of Ag loaded hedgehog-like TiO 2 architectures enable the sensor with fast responsive and recovered properties. TiO 2 loaded with 0.5 at% Ag exhibited the highest response to xylene with low response/recovery time at the operating temperature of 375 °C. In addition, the sensitivity and selectivity of the TiO 2 sensor were enhanced markedly with Ag loading.
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
MICROPOROUS AND MESOPOROUS MATERIALS
·
2016
·
IF 3.349
Mingming Zou,Honghong Liu,Lu Feng,Fengqiang Xiong,Tiju Thomas,Minghui Yang
A simple solvothermal approach with post-calcination is used to obtain (Ag, Ag 2 O) co-loaded TiO 2 microspheres with high specific surface area (43.8 m 2 g -1 ) and desirable visible light photocatalytic degradation (64% after 2 h visible light irradiation). Generally, N-doping of TiO 2 via nitridation using NH 3 improves the visible light absorption property of material. However, nitridation of (Ag, Ag 2 O) co-loaded TiO 2 results in a deleterious impact on the photocatalytic performance (around 20% after 2 h visible light irradiation). This is because nitridation of Ag-Ag 2 O-TiO 2 results in (a) reduction of Ag 2 O to Ag and (b) Ag agglomeration and grain growth on TiO 2 particles. These results in fact imply that in as-synthesized (Ag, Ag 2 O) co-loaded TiO 2 systems, local surface plasmonic resonance (associated with of 5–12 nm Ag particles) aids in enhanced broad band visible light absorption; furthermore the heterojunction between TiO 2 and Ag 2 O improves efficiency with which photogenerated carriers become available for photocatalysis . In all cases we show through selective radical quenching experiments that singlet oxygen is the primary reason for the dye degradation observed.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2021
·
IF 5.485
Boya Ma,Wenjing Lv,Jinying Li,Chunwei Yang,Qian Tang,Dong Wang
Aniline is a refractory pollutant with high toxicity that will cause pollution if discharged without treatment. However, conventional technology cannot meet the requirements of safe disposal. It is necessary to develop novel treatment technology to address this problem, and the electro-Fenton process could be a solution. In this study, a novel CNT-Ag@Cu cathode was synthesized by Ag doping and multiwall carbon nanotube (CNT) 3D morphology modification of copper foam (CF). The composition, structure and morphology of CNT-Ag@Cu were obtained. The aniline removal rate was over 99% under optimal conditions. The kinetic analysis results indicated that aniline removal followed a pseudo-first-order kinetic law, and the reaction rate constant reached 0.0661 min −1 . The aniline removal rate also reached 99.2% after the CNT-Ag@Cu cathode was used 10 times without further treatment. The CNT-Ag@Cu cathode had an excellent ability to maintain an OH concentration that reached 0.5 μmol/L after 60 min of reaction. Aniline removal is a coupling multimechanism in which Ag loading improves H 2 O 2 generation and the nanoconfinement effect of CNTs promotes accumulation of a high concentration of OH.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
WATER ENVIRONMENT RESEARCH
·
2019
·Vol. 92
·期 5
·713-721
·
IF 1.24
Yunhai Zhang,Shuangxi Zhou,Xin Su,Jimin Xu,Guangze Nie,Yongjun Zhang,Yide He,Shuili Yu
A p-type TiO 2 with Ti vacancies (D-TiO 2 ) was synthesized by a facile solvothermal treatment, and Ag/TiO 2 with different Ag loading amount was prepared through a photo-reduction deposition method. The samples were characterized through scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The adsorption and photocatalytic characteristics of tetrabromobisphenol A (TBBPA) on D-TiO 2 and Ag/TiO 2 were investigated. The adsorption of TBBPA on Ag/TiO 2 was significantly enhanced and was five times greater than that of pure TiO 2 . The increase in pH significantly inhibited the adsorption of TBBPA. The 2%-Ag/TiO 2 nearly completely degraded TBBPA in 10 min under UV–Vis light (λ > 360 nm), and the apparent reaction rate constant ( k app ) reached 0.63 min −1 . The significantly enhanced UV–Vis light catalytic properties of the Ag/TiO 2 in comparison with that of TiO 2 were attributed to the increased adsorption capacity and electron transfer ability of the Ag/TiO 2 . Free radical trap experiments results showed that holes and superoxide radicals play a major role in the catalytic degradation of TBBPA by Ag/TiO 2 . Moreover, the Ag/TiO 2 catalyst exhibits high stability during TBBPA degradation even after three cycles. Practitioner points Ti-defected TiO 2 and Ag/TiO 2 were synthesized using a solvothermal and photo-reduction deposition, respectively. Ag/TiO 2 exhibited outstanding adsorption and photocatalytic activity for TBBPA removal under UV–Vis light. Holes and superoxide radicals play a major role in the photocatalytic degradation of TBBPA.
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
CHEMOSPHERE
·
2025
·
IF 8.1
Jelena Petrović,Xiao-Han Pan,Zeynep Talip,Jian-Hua Zu,Đorđe Cvjetinović
This study explores the effectiveness of radiografted chelating adsorbents for the recovery of rhodium (Rh) from acidic wastewater, focusing on functionalized materials with and without loaded silver (Ag). Platinum group metals (PGMs), particularly Rh, are essential yet rare, necessitating efficient recovery methods from industrial waste. Rh exhibits complex chemistry in acidic environments, often complicating its extraction and recovery. Traditional methods such as solvent extraction and ion exchange adsorption have limitations, prompting the development of alternative recovery methods. The adsorption efficiency of these materials was evaluated in a wide range of hydrochloric acid (HCl) concentrations, both in static and dynamic conditions. Radiotracer 101 Rh was used to track and quantify Rh adsorption. Results show that the radiografted chelating adsorbents exhibit high distribution coefficients ( K d , LogK d ≈ 3) and high adsorption capacities ( Q c > 74 mg/g), comparable or superior to commercial resins, particularly under varying pH conditions. Selective recovery of Rh was achieved even in the conditions of extreme competition (with additional 21 metal ions). Therefore, amine and amide-based adsorbents presented in this study could offer a sustainable and inexpensive alternative to standard methods of Rh recovery from industrial waste.
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 Materials Chemistry A
·
2013
·Vol. 1
·期 47
·14963-14972
·
IF 0
Zhifeng Jiang,Xiaomeng Lv,Deli Jiang,Jimin Xie,Danjun Mao
Extending the UV response of anatase TiO2 photocatalysts into the visible light range can play a pivotal role in promoting the practical applications of these catalysts. Nitrogen and carbon co-doped, silver loaded anatase TiO2 (Ag@NC–TiO2) single-crystal nanosheets dominated by {001} facets were prepared for the first time using leaves as the nitrogen and carbon source by a facile, low cost method. The size of the Ag particles on NC–TiO2 nanosheets can be tuned from 1.5 nm to 15 nm using a photo-reduction strategy. The synthesized Ag@NC–TiO2 nanosheets show higher photocatalytic activity in the photodecomposition of organic pollutants compared to NC–TiO2, TiO2 and P25 under visible light irradiation. The enhanced photocatalytic efficiency was ascribed to a synergistic effect between N, C and Ag. In addition, the formed Ag@NC–TiO2 heteronanosheets are highly dispersible in aqueous solution and are capable of efficient catalysis for the reduction of p-nitrophenol. The present synthesis gives a promising method of forming non-metal co-doped, metal nanoparticles (NPs) loaded anatase TiO2 with dominant {001} facets and for broad applications in catalysis and photocatalysis.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2020
·
IF 2.627
Jinghang Li,Huimin Zang,Shun Yao,Zicheng Li,Hang Song
In recent years, ionic liquids (ILs) have been widely used in extraction, synthesis, electrochemistry and other fields. Meanwhile, the environmental impact of ILs has been attracting a lot of attention, and eco-friendly treatment for ILs is becoming a necessary subject. In this study, photocatalytic degradations of benzothiazole ILs catalyzed by titanium dioxide (TiO 2 ) and silver-loaded titanium dioxide (Ag/TiO 2 ) were studied for the first time. The degradation of benzothiazole hexafluorophosphate ([C 4 Bth]PF 6 ) could reach more than 99% within 240 min with the catalysis of TiO 2 . To improve catalytic efficiency, Ag/TiO 2 was synthesized and characterized by UV–Vis diffuse reflectance absorption spectra (DRS) and X-ray photoelectron spectroscopy (XPS). The degradation of [C 4 Bth]PF 6 could reach more than 99% within 120 min in the degradation catalyzed by Ag/TiO 2 . The photodegradation products of benzothiazole ILs are composed of inorganic substances or organic substances with simpler structures, which are easier to decompose and less toxic. The degradation system proposed by this study could provide a simple, green, safe, and economical method for the efficient treatment of benzothiazole ILs.
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
CATALYSIS LETTERS
·
2019
·Vol. 149
·期 3
·882-890
·
IF 2.372
Zhang Lu,Yu Deyou,Wu Minghua,Lin Junxiong
Abstract In order to improve the photocatalytic degradation performance of Ag 3 PO 4 and reduce the cost of photocatalyst made of Ag 3 PO 4 , a kind of Ag 3 PO 4 /TiO 2 composite was successfully fabricated via a simply precipitation method for the Ag 3 PO 4 nanoparticles being loaded on the surface of commercial titanium dioxide (P25) to form a heterostructure. The Ag 3 PO 4 /TiO 2 composite were characterized by FT-IR, XRD, XPS, FE-SEM, HR-TEM, DRS and PL and applied for the degradation of formaldehyde solution under solar radiation. The results showed that the degradation rat of Ag 3 PO 4 /TiO 2 composite (0.01796 min −1 ) was much higher than that of pure Ag 3 PO 4 (0.00775 min −1 ), indicating that the Ag 3 PO 4 /TiO 2 composite possessed better photocatalytic degradation activity for the formaldehyde solution than pure Ag 3 PO 4 . The composite significantly decreased the dosage of silver for photocatalyst under solar radiation, thereby reduced the cost of the photocatalyst made from silver. Graphical Abstract
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
危险品化学品经营许可证（带存储）