NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 27
·13303-13314
·
IF 3.925
Juan Wang,Zongxue Yu,Ximei Zhu,Xuehan Xiao,Yao Pang,QiuYue Tan,Yucheng Liu
It is always concerning about how to remove oil–water emulsions and dyes simultaneously and how to find a suitable separation film. Therefore, a modified super-hydrophilic anti-fouling separation film was prepared by combining NH2-MIL-125(Ti) with reduced graphene oxide (RGO), obtained through modifying graphene oxide (GO), with polydopamine (PDA). The complex film contains hydrophilic functional groups such as carboxyl, amino and benzene rings. It has super-hydrophilicity and super-hydrophobicity underwater, because of the presence of RGO and nanomaterials. The complex film has a high throughput and retention rate for separating oil–water emulsions and dyes. The oil–water retention rate is above 99% (flux > 600 L m−2 h−1) and the dye retention rate is above 99% (flux > 700 L m−2 h−1) except for Congo red. Furthermore, the oil–water retention rate is still close to 99.4%, and the retention rate is above 96% after ten cycles. In addition, the composite film has some stability even after immersion under strong acid and alkali conditions for 30 days. The prepared composite film shows good prospects for the simultaneous removal of oil–water emulsions and dye contaminants.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 31
·e52724
·
IF 3.057
Chunhui Du,Jintai Hu,Fen Chen
Polypropylene (PP) porous flat membrane is ultrathin and has high porosity, which is suitable for the support of forward osmosis (FO) membrane. However, its high hydrophobicity is its Achilles heel. In this study, dopamine and UiO-66-NH 2 were co-deposited onto the surface of PP support, and then interfacial polymerization was performed to fabricate a thin-film nanocomposite (TFN) FO membrane. The reaction-generated polydopamine improved the hydrophilicity of PP membrane, and at the same time enhanced the adhering of UiO-66-NH 2 to the support. The experimental results indicated that the UiO-66-NH 2 nanoparticles were anchored evenly on the surface of the support, which improved the water flux of FO membrane from 11.1 LMH (TFC, TFN-0 without UiO-66-NH 2 ) to 20.7 LMH (TFN-0.1, with 0.1 wt% UiO-66-NH 2 ) using 1 mol/L NaCl as the draw solution in FO mode. Compared with TFC membrane, TFN-0.1 membrane also exhibited relative lower specific salt flux (~0.252) and structural parameter (~379 μm). When separating sodium alginate foulant, the normalized water flux recovery ratio of TFN-0.1 was remained 0.89, and most of the fouling was reversible, as for TFC membrane the data decreased to 0.76 after 2 cycles of operation. These results suggested that UiO-66-NH 2 modified FO membrane exhibited good permeation and antifouling property.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yang Wang,Sheng Feng,Wei Wu,Yun Zhou,Zhiwei Ye,Xiaojun Dai,Xun Cao
In this article, we reported a method for synthesizing cluster-like NH 2 -MIL-125(Ti)/BiOBr (NMT/B) Z type heterojunction composite materials with different content by using ionic liquid as bromine source assisted solvothermal method. In visible light , the photocatalytic activity of the materials was analyzed by degradation of tetracycline. Characterize the prepared composite material by XRD , FTIR, SEM, TEM, XPS , UV–vis diffuse reflection spectra (DRS). The result proved that the NH2-MIL-125(Ti) (NMT) nanosheets were tightly loaded on the BiOBr surface. NMT/B composite materials showed higher catalytic activity than monomer materials. The removal rate of TC reached 88% in 90min, which was 3 times and 5.7 times that of the monomer NMT and BiOBr monomer materials, respectively. In the catalytic process, –O 2 - and h + are the main active substances that degrade pollutants. This is proved by free radical capture experiments. It could be inferred that the improved photocatalytic activity of NMT/B composites was contributed to the good energy band structure and the formation of Z-type heterojunctions in close contact, which greatly facilitates the photogenerated carrier and hole migration and dissociation. Cycle experiment proved that the prepared composite material has excellent stability, which indicated that it had a good prospect in practical applications.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 48
·5830-5837
·
IF 2.896
Shouhui Chen,Jingguo Yu,Zhen Chen,Zhenzhong Huang,Yonghai Song
The presence of Cd2+, Pb2+, Cu2+ and Hg2+ in drinking-water can be harmful to human health, even if their concentration is fairly low. Hence, it is significant to detect these heavy metal ions in sewage to evaluate the quality of water. Herein, amino-functionalized metal–organic frameworks (NH2-MIL-88(Fe)) embedded with graphitic carbon nitride (g-C3N4) nanosheets and acid-functionalized carbon nanotubes were prepared via a one-pot synthesis. The composite can be directly modified on the surface of glass carbon electrodes without the assistance of Nafion or other binders. The modified glass carbon electrodes can be used to simultaneously detect Cd2+, Pb2+, Cu2+ and Hg2+ in water via square wave stripping voltammetry. The doping of g-C3N4 in the composite, rich in N-containing functional groups, participates in the adsorption of metal ions on the surface of the electrodes. The porous composite provides accommodation room for metals generated by electro-reduction. The detection limit for Cd2+, Pb2+, Cu2+ and Hg2+ is 39.6 nM, 7.6 nM, 11.9 nM, and 9.6 nM, respectively. And the sensitivity for Cd2+, Pb2+, Cu2+ and Hg2+ is 0.0789 mA μM−1 cm−2, 0.4122 mA μM−1 cm−2, 0.2616 mA μM−1 cm−2, and 0.3251 mA μM−1 cm−2, respectively. This work not only enriches the functional design of Fe-MOF materials, but also develops a method for the determination of metal ions using the adsorption sites in g-C3N4.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Zijie Wang,Yannan Jia,Weikun Song,Xiaoqin Li,Kai Xu,Zheng Wang
The removal of boron in desalinated seawater has always been one of the keys to restrict the use of desalinated seawater. For this reason, a composite adsorbent named UiO-66-NH 2 /GO was successfully prepared by a simple solvothermal method through this research. It is composed of graphene oxide and water-stable metal organic framework UiO-66-NH 2 , and for the first time as a boron adsorbent for the treatment of desalinated seawater. Various technologies were applied to systematically analyze the stability, structure, topography and chemical characteristics of the composite adsorbent. The relationship between the influencing factors and the adsorption effect was investigated, including the amount of adsorbent, contact time, initial concentration of boron, and pH of the boron solution. It is proved that the boron adsorption complies the pseudo-second-order kinetic model , the intra-particle diffusion model and the Langmuir isotherm model through the fitting of experimental results. The adsorption of boron by UiO-66-NH 2 /GO has both physical and chemical adsorption , including electrostatic attraction , covalent bond or electron transfer . The results of thermodynamic study pointed out the adsorption of boron is spontaneous and feasible. The response surface method was designed to improve the adsorption conditions of boron. The optimized adsorption conditions to reach 26.45 mg/g of boron adsorption were found to be at dosage of 75.03 mg/g with pH of 5 and temperature of 321.19 k. UiO-66-NH 2 /GO showed good removal ability for low concentration boron and good reusability . The above suggest that UiO-66-NH 2 /GO has the potential to be applied to desalinated seawater treatment.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiaoxue Zhao,Linlin Sun,Xian Jin,Mengyang Xu,Shikang Yin,Jinze Li,Xin Li,Dong Shen,Yan Yan,Pengwei Huo
Z-scheme heterojunction can effectively separate photo-generated carriers and enhance photocatalytic activity of CO 2 reduction. In this work, we report indirect Z-scheme heterojunction of UiO-66-NH 2 /Cu 2 O/Cu, which achieves highly CO 2 photocatalytic conversion to CO. Among these, UiO-66-NH 2 /Cu 2 O/Cu-0.39 (U/C/Cu-0.39) displays the best activity with a CO yield of 4.54 μmol·g −1 ·h −1 , which is 37.8 times higher than that for UiO-66-NH 2 and 50.4 times higher than that for Cu 2 O. Cu not only acts as the electron conductor of the indirect Z-scheme heterojunction to promote the charge carrier transmission, but also acts as the active site of CO 2 reduction. The increase of active sites and the CO 2 adsorption capacity results in the superior photocatalytic performances.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jiali Tang,Yingbi Chen,Minghu Zhao,Shixing Wang,Libo Zhang
A novel metal-organic framework (UiO-66-PTC) for efficient removal of Pb 2+ ions from wastewater has been prepared by using 4-phenyl-3-thiosemicarbazide as the modifier. Various characterizations showed that UiO-66-PTC was successfully synthesized. The absorption results showed that the maximum adsorption capacity of Pb(II) is 200.17 mg/g at 303 K and optimal pH 5. The adsorption kinetic follows the pseudo-second-order model and the adsorption isotherms fit the Langmuir model. This shows that Pb(II) is a single-layer adsorption on the surface of the adsorbent and the rate-controlling step is chemical adsorption . The thermodynamic results show that the adsorption process can proceed spontaneously, belong to the exothermic reaction . The adsorbent can selectively uptake lead ions from wastewater containing multiple interfering ions. After four adsorption and desorption cycles, the adsorption efficiency is still high. The adsorption mechanism of Pb(II) on the adsorbent is mainly through the chelation of Pb(II) with N and S atoms. These results indicate that UiO-66-PTC is an effective material for efficiently and selectivity removal of Pb(II) from solution, which is of practical significance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 7
·2647-2657
·
IF 6.843
Xiaojuan Wang,Xuejian Zhou,Kai Yang,Qiong Li,Rongxin Wan,Guoying Hu,Jin Ye,Yue Zhang,Jiahui He,Hanqing Gu,Yongfang Yang,Lei Zhu
In this study, UiO-66-NH2 metal–organic framework (MOF) nanoparticles with peroxidase and oxidase mimetic activities were incorporated into a chitosan (CS) matrix by a simple and environmentally friendly method. The UiO-66-NH2/CS composite membrane possesses the peroxidase mimicking activity in the presence of traces of H2O2, thus resulting in good antibacterial properties. Intriguingly, 30 min of UV pre-irradiation of the UiO-66-NH2/CS composite membrane, in the absence of H2O2, still leads to a good antibacterial activity. This was attributed to the oxidase mimetic activity and the peroxidase mimicking activity of UiO-66-NH2. In such a way, the side effects of direct exposure to UV irradiation and H2O2 can be avoided for wound-healing treatments. The antibacterial mechanism was further proved by antibacterial experiments, TMB·2HCl color development experiments, reactive oxygen species generation tests and electron spin resonance tests. As a potential medical antibacterial dressing, in vitro membranes were also investigated.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Qixia Guan,Hao Guo,Rui Xue,Mingyue Wang,Xin Zhao,Tian Fan,Wenhu Yang,Mengni Xu,Wu Yang
An electrochemical sensing platform for simultaneous determination of dopamine (DA) and uric acid (UA) is constructed based on covalent organic framework materials (IL COF-1), aminofunctionalized carbon nanotubes (MWCNT-NH 2 ), and gold nanoparticles (AuNPs). The prepared sensor shows a good performance in detection of DA and UA due to porosity, large specific surface area, high conductivity and more active sites of the composite modified material. Under optimized experimental conditions, the constructed electrochemical sensor has sensitive response and good linearity to both DA and UA. Their wide linear ranges are 0.7–108 μM and 0.97–200 μM, and the detection limits are 0.21 μM and 0.29 μM (S/N = 3), respectively. The developed method has been successfully employed to determine the contents of DA and UA in dopamine injection and human urine samples. It has a satisfactory recovery rate, and the relative standard deviations (RSD) of three parallel determinations are all below 5.0%. In comparison, the constructed sensor platform has superior performance including low cost, simple structure, wide linear range and high sensitivity than some traditional methods, which is expected to be widely used in real sample analysis.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2021
·
IF 2.348
Xingchang Tang,Yongwei Luo,Zhijian Zhang,Wanwu Ding,Dexue Liu,Jingchuan Wang,Li Guo,Ming Wen
The high surface areas and tunable properties of Zr-based MOFs make them as attractive materials for gas capture, storage, and separation. In this work, UiO-66, one kinds of Zr-based MOFs, functionalized by single or binary –NO 2 and –NH 2 groups are synthesized. Water adsorption ability and hydrophilicity of UiO-66 and functionalized UiO-66-X were investigated. It is found that surface area of UiO-66 is decreased after introducing functional groups, while hydrophilicity of UiO-66 increased after functionalized with –NO 2 and –NH 2 . Therefore, after balance the effects of surface area and hydrophilicity, UiO-66-NH 2 shows the best water adsorption propriety.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 3
·1-12
·
IF 2.426
Chen Yang,Jiang Lanying
In this research, an attempt has been made to prepare a membrane with high adsorption capacity and high separation efficiency for oil water. The composite membrane of UiO-66-NH 2 and polyacrylonitrile (PAN) were fabricated by electrospinning, and hydrophobic modification was carried out to obtain the oil selectivity. UiO-66-NH 2 loaded on fibers significantly enhanced the oil affinity and surface roughness of the composite membrane. The composite membrane was used for colleseed oil, kerosene, methylbenzene, methyl silicone oil and dichloromethane adsorption, and the maximum adsorption capacity were 31.5, 21.9, 19.9, 39.9, 39.7 g·g −1 , respectively, which was 32–96% higher than pure PAN adsorbent. The amount of UiO-66-NH 2 loaded on fibers accelerated the diffusion of oil in membrane and reduced the adsorption time to reach equilibrium. The adsorption process can be well described by pseudo-second-order and intra-particle diffusion model. The composite membrane also showed potential reusability. In addition, the composite membrane has excellent performance in oil/water separation, and the oil can be separated from mixture solution just under gravity. The oil flux is 2286 Lm −2 h −1 and remains 1568 Lm −2 h −1 after ten times continuous filtration. Overall, the composite PAN-MOFs-coated membrane has promising potential in practical application in oil/water separation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Yuqiong Gong,Shoujian Gao,Yangyang Tian,Yuzhang Zhu,Wangxi Fang,Zhenggong Wang,Jian Jin
In this work, ultrasmall metal-organic frameworks (MOFs) nanoparticles , UIO-66-NH 2 nanoparticles were synthesized and embedded in an ultrathin polyamide (PA) active layer via the interfacial polymerization reaction on a polydopamine-wrapped single-walled carbon nanotube film. A thin-film nanocomposite nanofiltration (TFN NF) membrane with a PA/UIO-66-NH 2 active layer as thin as 20 ± 3 nm was thus fabricated. The loading mass of the nanoparticles in the TFN NF membrane could be tuned by controlling the nanoparticles concentration in aqueous phase. Benefiting from the ultrathin thickness of active layer and the high loading mass of the MOFs nanoparticles, water permeability up to 46 L m −2 h −1 bar −1 along with a Na 2 SO 4 rejection of 97.1% was achieved, which is 53% increase of the TFC NF membrane without the addition of UIO-66-NH 2 nanoparticles. Our membrane owns the thinnest active layer in the category of TFN NF membranes reported so far and exhibits outstanding desalination performance.
✓ 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）