WATER RESEARCH
·
2021
·
IF 11.236
Bingliang Zhang,Xuening Wang,Zhuoyao Fang,Shu Wang,Chao Shan,Si Wei,Bingcai Pan
ABSTRACT Ultraviolet-based advanced oxidation processes (UV-AOPs) are very promising in advanced treatment of municipal secondary effluents. However, the transformation of dissolved effluent organic matter (dEfOM) in advanced treatment of real wastewater, particularly at molecular level, remains unclear. In this study, Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) coupled with multiple statistical analysis were performed to better understand the transformation of dEfOM in UV/H 2 O 2 , UV/persulfate (UV/PS), and UV/chlorine treatments. An obvious increase in oxygen content of dEfOM was observed after every UV-AOPs treatment, and the detailed oxygenation processes were further uncovered by mass difference analysis based on 24 types of typical reactions. Generally, UV/H 2 O 2 process was subjected to the most oxygenation reactions with the typical tri-hydroxylation one (+3O), whereas di-hydroxylation reaction (+H 2 O 2 ) was dominant in UV/PS and UV/chlorine processes. Additionally, the three UV-AOPs shared the majority of precursors, and more proportions of unique products were identified for each process. The precursors with lower H/C and higher aromaticity were readily degraded by UV/chlorine over UV/H 2 O 2 and UV/PS, with the products featuring lower molecular weight. Moreover, dEfOM of high aromaticity tended to produce chlorinated byproducts through addition reactions in chlorination and UV/chlorine processes. Among these UV-AOPs, the highest reduction of both acute toxicity and specific UV absorbance at 254 nm (SUVA 254 ) was observed for UV/chlorine, implying the potential for UV/chlorine process in advanced treatment of wastewater. In addition, acute toxicity was highly correlated with SUVA 254 and CHOS compounds. This study is believed to help better understand the different fates of dEfOM in real wastewater during UV-AOPs treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Linxi Feng,Guanhao Ma,Rouyan Li,Jiangyu Luo,Jinqing Qu
High-performance UV-curable modified acrylated epoxidized soybean oil (AESO) was synthesized by reacting glycerol dimethacrylate with succinic anhydride to obtain monocarboxylic intermediate (GSA) and then reacting with the epoxide group of epoxidized soybean oil by using GSA. The effect of the degree of modification of GSA on the performance of AESO was investigated. The results indicated that as the modification degree of GSA increased, the overall performance of the modified resin coating initially improved, reaching its optimum at a 75 % GSA modification degree (AESO-75 %GSA). FT-IR, 1 H NMR, and GPC were used to characterize the structure and molecular weight of the modified AESO-75 %GSA. Additionally, compared with AESO, the tensile strength of the AESO-75 %GSA cured coating film was increased from 1.2 MPa to 14.4 MPa, and the elasticity modulus was increased from 19.7 MPa to 646.4 MPa, both of which exceeded the literature-reported values of the modified AESO. Moreover, the cross-linking density was also significantly increased from 2.34 × 10 3 mol/m 3 to 13.19 × 10 3 mol/m 3 . In addition, AESO-75 %GSA successfully printed exquisite samples in a laser cladding deposition (LCD) 3D printer with 5 s/slice. The results provided theoretical guidance for the preparation of high-performance AESO.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2009
·
IF 3.054
Shuang Song,Zhiwu Liu,Zhiqiao He,Yu Li,Jianmeng Chen,Chaolin Li
Biocides usually persist during municipal sewage treatment and are subsequently distributed into aquatic environments. To explore the capability of advanced oxidation processes for the rapid removal of biocides, we examined the total organic carbon (TOC) reduction of 4-chloro-3,5-dimethylphenol (PCMX) with a combination of UV/O 3 . Moreover, the related important parameters, including the mass transfer coefficient and light utilization efficiency, in PCMX degradation were determined. The UV/O 3 experimental results showed a pronounced synergistic effect, leading to the nearly complete elimination of TOC within 75 min. Thus, the effect of operating variables was investigated as a function of pH, ozone dosage, bulk temperature and the initial concentration of PCMX. The efficiency of PCMX mineralization increased with an increase in ozone dose up to 3.1 g h −1 , and a decrease in the initial concentration from 250 to 100 mg L −1 . The optimal pH value was 4.0, and the preferred bulk temperature was 20 °C on the basis of the influence of temperature on reaction rate and ozone solubility. The major aromatic intermediates identified by gas chromatography/mass spectrometry were 2,6-dimethylbenzene-1,4-diol, 2,6-dimethylbenzo-1,4-quinone, 2,6-bis(hydroxymethyl)benzo-1,4-quinone, and 2,6-dimethylbenzo-1,4-aldehyde. Quantitative determination of related carboxylic acid and inorganic anions was done by ion chromatography . On the basis of the identified reaction products, a possible degradation pathway for the UV/O 3 oxidation of PCMX in aqueous media is proposed.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Tianyu Pan,Yuewen Huang,Hui Liu,Tianyi Xu,Yunlong Wang,Binzhi Wang,Jinrong He,Bin Wang
Protective hard coatings are crucial for the screens of electronic devices; however, conventional polymer coatings often face limitations in hardness, self-cleaning ability, and fingerprint resistance. In this study, we developed a novel UV dual-curable ladder-like polysilsesquioxane (LPSQ) coating, modified with boroxyl groups, to improve its protective performance. LPSQ was synthesized via a sol-gel process using controlled ratios of phenyltrimethoxysilane (PTMS), 3-methacryloxypropyltrimethoxysilane (KH-570), and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS). The subsequent modification with 4-vinylphenylboronic acid (4-VPBA) introduced a boroxyl network through thermal dehydration. The resulting LPSQ-co-VPBA coating exhibited exceptional mechanical properties, achieving a pencil hardness of up to 8H and excellent adhesion (Grade 0). Notably, the LPSQ153-co-VPBA coating demonstrated extraordinary hardness of 1.83 GPa. Furthermore, the modified coating exhibited enhanced thermal stability, with its decomposition temperature rising from 200 °C to 350 °C, as well as superior UV shielding (41.2 % increase in absorption) and excellent visible light transmittance. Additionally, the coating displayed remarkable self-cleaning and anti-fingerprint properties, with artificial fingerprint liquid sliding off in just 1 s. These findings underscore the potential of boroxyl-modified LPSQ coatings as high-performance protective materials for next-generation electronic device screens. It offer superior hardness, optical clarity, thermal stability, and self-cleaning properties.
研究领域:
材料科学
·
高分子化学
·
表面工程
·
功能涂层
·
光电材料
·
纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2016
·Vol. 8
·期 8
·1547-1552
·
IF 1.812
Tao Gang,Wang Yejing,Liu Lina,Chang Huaipu,Zhao Ping,He Huawei
Sericin has shown a great potential as a biomaterial in biomedical application due to its good hydrophilicity, reactivity and biodegradability. To solve the adherence and growth of microorganisms on sericin gel, here we prepared a polyelectrolyte film with interactive arrangement of
opposite charges poly(dimethyldiallylammonium chloride) (PDDA) and poly(acrylic acid) (PAA) coated on the surface of sericin gel via electrostatic interaction. AgNPs was then synthesized with the assistance of UV in situ on the polyelectrolyte film to endow the antibacterial
activity of sericin gel. SEM revealed the polyelectrolyte film could effectively facilitate the high density growth of AgNPs as a 3-D matrix and the modification of polyelectrolyte and AgNPs did not alter the porous characteristics of sericin gel. XRD studies suggested AgNPs synthesized on
the polyelectrolytes film coated sericin gel had good crystal structure. DSC analysis showed AgNPs could tightly bind with the polyelectrolytes film and sericin gel, and the binding may improve the melting temperature of AgNPs. Both bacterial inhibition zone and growth curve assay demonstrated
the sericin gel coated with AgNPs-polyelectrolytes film had an excellent and long-lasting antibacterial activity. This novel sericin gel has shown great potentials in biomedical application such as wound healing.
研究领域:
生物医学材料
·
纳米技术
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Junjie Ao,Jiaping Gu,Tao Yuan,Dan Li,Yuning Ma,Zhemin Shen
A highly selective sample cleanup method using molecularly imprinted polymers (MIP) was developed for the enrichment of domoic acid (DA, an amnesic shellfish toxin) from both seawater and shellfish samples. Molecular modelling was firstly applied to screening a suitable functional monomer and optimize the polymer preparation. Theoretical results were in a good agreement with those of the experimental studies. MIP was prepared by precipitation polymerization using 1, 3, 5-pentanetricarboxylic acid and 2-(Trifluoromethyl)acrylic acid as the template molecule and functional monomer, respectively. The morphology and molecular structure of MIP were revealed by scanning electron microscope (SEM) and fourier transform infrared spectroscopy (FTIR), respectively. The obtained MIP showed high affinity and selectivity for DA with binding site numbers of 0.875 mg g −1 and an average association constant of 0.219 L mg −1 evaluated by adsorption experiments. The developed molecularly imprinted solid-phase extraction (MISPE) column achieved satisfied adsorption rate (99.2%) and recovery (71.2%) with relative standard deviation (RSD) less than 1.0%, which is more stable and precise than the C 18 , SAX, and HLB columns. Finally, the determination method for DA in both seawater and shellfish samples was then successfully established and validated using MISPE coupled with high-performance liquid chromatography-ultraviolet detection (HPLC-UV). The method limit of detection was 20 μg L −1 and 50 μg kg −1 for seawater and shellfish, respectively. This study demonstrates that molecular modelling is a useful tool to screening functional monomer and optimize polymer preparation. It provides an innovative polymer for trace DA monitoring in both seawater and shellfish.
研究领域:
分析化学
·
环境科学
·
海洋生物学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jinxu Zhao,Qijun Chen,Ying Zhou,Jianming Zheng,Chunye Xu
The poor electrochemical reversibility of the dimers limits the application of viologens in aqueous electrochromic devices (ECDs). Here, we report a tetramethyl viologen, 2,2′,6,6′-tetramethyl-4,4′-bipyridine hydrobromide ([MVH][Br]), in which tetramethyl substitution provides significant steric hindrance to prevent dimerization. Our experiments show that this designed viologen performs excellently in an aqueous solvent, including excellent color variation, optical modulation, cycling stability, and radical inertness. Typically, an aqueous ECD fabricated with the viologen is able to retain 95.48% of its optical modulation after 5000 cycles. Furthermore, we found that this viologen is impervious to UV polymerization. Based on this property, we demonstrate a bichromatic ECD based on a hydro-ionic hybrid gel using in situ UV polymerization. This study not only extends the application of viologens in aqueous ECDs but also paves the way for the future development of high-mechanical-performance hydrogel-based ECDs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2019
·Vol. 20
·期 11
·2289-2296
·
IF 1.439
Li Chunli,Ma Wei,Ren Xuehong
In this study, 2-(2-hydroxy-4-acryloyl)-2H-benzotriazole (BTHA), a benzotriazole ultraviolet absorber monomer, was synthesized from 2-(2,4-dihydroxyphenyl)-benzotriazole (BTDP) and acryloyl chloride. The synthesized BTHA was characterized by 1 H-NMR, FTIR, and ultraviolet spectroscopy, and grafted onto polyester fabrics by the traditional pad-dry-cure (PDC) process. The effects of monomer concentration and initiator concentration on the UPF values of the grafted PET fabrics were studied. The grafted fabrics were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The breaking strength of the grafted PET fabrics was comparable with the original PET fabrics in warp and weft directions. The UV protection factors improved significantly after grafting. The modified PET fabrics exhibited good durability to washing. The grafting of BTHA onto PET fabrics protected the damage of UV light to PET fabrics and decreased the strength loss of PET fabrics after UVA light exposure.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Xiaoming Wang,Zhiyuan Zhang,Juanjuan Lu,Feng Zhang,Shilie Pan
Zero-order waveplates, which are used to modulate the polarization of light, play a crucial role in scientific instrumentation, optical communications, and the laser industry. However, owing to the limitations imposed by birefringence and absorption edges, only few materials can produce desirable birefringence with suitable transparency in the ultraviolet (UV) and deep ultraviolet (DUV) regions. Borates represent promising materials with widely adjustable birefringence. In this study, we successfully synthesized two new borates, Li2CeRbB18O30 and Li2Cs2SrB18O30, using solid-state reactions in vacuum-sealed tubes; the fundamental building blocks (FBBs) of the two compounds are B3O7 and B9O19 units, respectively. Notably, Li2CeRbB18O30 and Li2Cs2SrB18O30 possess very low birefringence values of 0.0058 at 546 nm and 0.0068 at 546 nm, respectively, considerably lower than that of a commercial quartz waveplate (0.0092 at 532 nm). UV-Vis-NIR diffuse reflectance measurements show that the UV cutoff edges of Li2CeRbB18O30 and Li2Cs2SrB18O30 are lower than 320 and 200 nm, corresponding to the bandgaps of 3.20 and 6.20 eV, respectively. These two compounds can serve as potential zero-order waveplate materials in the UV and DUV regions.
研究领域:
材料科学
·
光学工程
·
无机化学
·
凝聚态物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qiaorong Guo,Dongbin Wei,Chuanfang Zhao,Cuiping Wang,Haijun Ma,Yuguo Du
Physical UV-blocker TiO 2 nanocomposites and chemical sunscreen benzophenones (BPs) have been frequently detected in the aquatic environment, their combined fates and potential risk should be concerned. In this study, the typical cosmetic grade UV-blocker TiO 2 nanocomposites (labeled as CG-TiO 2 ) and 2,4-dihydroxy benzophenone (BP-1) were targeted, and the effects of CG-TiO 2 on the transformation of BP-1 during UV irradiation were explored. It was found that CG-TiO 2 destruction did not form toxic products, while they could promote the chemical reactions of BP-1 that will lead to highly toxic products during UV irradiation. More importantly, UV irradiation could break the organic coatings on CG-TiO 2 , the broken CG-TiO 2 exhibited stronger catalytic activity on BP-1 and form highly toxic products during UV irradiation. Total of 24 transformation products were tentatively identified, including hydroxyl BPs, hydroxyl dibenzo-p-dioxins, hydroxyl benzoyl benzoquinones, etc. The main transforamtion mechanisms of BP-1 included hydroxylation, radical coupling, oxidation, decarboxylation, Norrish type I reaction, and ring closure through electrophilic substitution. This study highlighted that physical UV-blocker CG-TiO 2 promoted the transformation of chemical sunscreen BP-1 and generated higher toxicity during UV irradiation. It was expected that these results would provide scientific data for evaluating the fates and potential risk of sunscreens in the environment.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Nini Li,Xiaohong Ji,Somnath Mukherjee,Bing Yang,Yuqing Ren,Changhao Wang,Yashao Chen
In recent years, sunscreens’ adverse impacts on the environment and biology have gained wide attention. The improvement of sunscreen safety has become one of the major priorities in skin photoprotection research. It is an effective strategy to develop bionic photoprotective materials by simulating the photoprotective mechanism existing in nature. Inspired by the photoprotective mechanisms of skin and plant leaves, the bionic photoprotective material CS-SA-PDA nanosheet was developed using the free radical grafting method and Michael addition, with natural melanin analogue polydopamine (PDA) nanoparticles and plant sunscreen molecular sinapic acid (SA) as sun protection factors and natural polymer chitosan (CS) as the connecting arm. The results show that CS-SA-PDA can effectively shield UVB and UVA due to the possible synergistic effect between PDA and SA. The introduction of polymer CS significantly improved the photostability of SA and reduced the skin permeability of PDA nanoparticles. The CS-SA-PDA nanosheet can also effectively scavenge photoinduced free radicals. Furthermore, in vivo toxicity and anti-UV evaluations confirm that CS-SA-PDA has no skin irritation and is excellent against skin photodamage, which makes it an ideal skin photoprotective material.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Jing Deng,Anhong Cai,Xiao Ling,Qian Sun,Tianxin Zhu,Qingsong Li,Xueyan Li,Weizhu Chen
As an active metabolite of venlafaxine and emerging antidepressant, O-desmethylvenlafaxine (ODVEN) was widely detected in different water bodies, which caused potential harm to human health and environmental safety. In this study, the comparative work on the ODVEN degradation by UV (254 nm) and UV-LED (275 nm) activated sodium percarbonate (SPC) systems was systematically performed. The higher removal rate of ODVEN can be achieved under UV-LED direct photolysis (14.99%) than UV direct photolysis (4.57%) due to the higher values of photolysis coefficient at the wavelength 275 nm. Significant synergistic effects were observed in the UV/SPC (80.38%) and UV-LED/SPC (53.57%) systems and the former exhibited better performance for the elimination of ODVEN. The degradation of ODVEN all followed the pseudo-first-order kinetics well in these processes, and the pseudo-first-order rate constant ( k obs ) increased with increasing SPC concentration. Radicals quenching experiments demonstrated that both ·OH and CO 3 · − were involved in the degradation of ODVEN and the second-order rate constant of ODVEN with CO 3 · − (1.58 × 10 8 (mol/L) −1 sec −1 ) was reported for the first time based on competitive kinetic method. The introduction of HA, Cl − , NO 3 − and HCO 3 − inhibited the ODVEN degradation to varying degrees in the both processes. According to quantum chemical calculation, radical addition at the ortho-position of the phenolic hydroxyl group was confirmed to be the main reaction pathways for the oxidation of ODVEN by ·OH. In addition, the oxidation of ODVEN may involve the demethylation, H-abstraction, OH-addition and C-N bond cleavage. Eventually, the UV-LED/SPC process was considered to be more cost-effective compared to the UV/SPC process, although the UV/SPC process possessed a higher removal rate of ODVEN.
✓ 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）