JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 8
·3551-3567
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IF 4.5
Yang Xia,Wei Songrui,Ma Xilong,Gao Zhuwei,Huang Wei,Wang Dun,Liu Zhongxin,Wang Jieqiong
The photothermal process exhibits the largest energy conversion efficiency among all solar energy utilization processes. In this study, a core–shell CoTiO 3 @MnO 2 (CTM) composite photothermal catalyst was synthesized by supporting MnO 2 on CoTiO 3 by hydrothermal synthesis. Binding to peroxymonosulfate (PMS) heterogeneous catalyst removed tetracycline in wastewater. The new catalyst was characterized by FT-IR, UV–Vis, XRD, BET, SEM, TEM, and so on. Kinetic analysis showed that CTM activated PMS at a rate of 3.2 and 3.5 times higher than that of pure light and heat conditions, with complete degradation of tetracycline (TC). Since the outer MnO 2 layer converted the absorbed solar energy into thermal energy, PMS was activated to generate active species while performing electron transfer, which resulted in a considerably improved catalytic efficiency. To prove the wide applicability of the catalyst, other pollutants were degraded, including bisphenol A (BPA), metronidazole (MNZ), and methyl orange (MO). The three pollutants were degraded within 40 min. Finally, our findings demonstrated the mechanism of the photothermal degradation process and provided a novel approach for environmental remediation using renewable solar energy.
Graphical Abstract In this paper, the degradation efficiency of CoTiO 3 was improved by loading MnO 2 on CoTiO 3 . Binding to peroxymonosulfate (PMS) heterogeneous catalyst activation for the catalytic degradation of tetracycline. It was found by experiments that the core-shell structure of the composite material CoTiO 3 @MnO 2 had better photothermal catalysis efficiency than photocatalysis and thermal catalysis.
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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 4
·1-19
·
IF 2.9
Gao Zhicheng,Zhang Lei,Shi Xin,Yang Jun,Wang Xunqiu
So far, the purification of dyes wastewater through adsorption and other economical and environmentally friendly methods had received great attention. Therefore, this study mainly discussed the role and rule of PA65 material in wastewater dye treatment. In the experiment, the effects of pH value of solution, initial dye concentration, amount of adsorbent and adsorption time on the removal rate of orange G were studied. It was found that under the conditions of pH < 6, initial dye concentration of about 70 mg·L −1 , amount of adsorbent of about 60 mg, and adsorption time of 120 min, good adsorption performance could be achieved. Under acidic conditions, the PA65 with a pore structure exhibited certain adsorption performance for anionic dyes and had higher selectivity for binary mixed dyes. FITR analysis confirmed the presence of amide groups and amino groups interacting with dye molecules. In addition, the experimental data was fitted by adsorption isotherms and adsorption kinetics model. The results showed that the Langmuir model best describes the equilibrium isotherm data, showing a maximum adsorption capacity of 63.17 mg‧g −1 , and the adsorption data follows the pseudo-second-order dynamics model. The thermodynamic properties revealed that the adsorption process was endothermic and spontaneous.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Xiaoxi Yu,Xiaocui Wu,Fang Guo,Jingping Liu,Qingshan Zhao
As a promising advanced oxidation process , photo-assisted peroxymonosulfate (PMS) activation for wastewater treatment has attracted widespread attentions. However, rational design of synergetic and recyclable catalysts for PMS photo-activation remains a big challenge. In this study, a carbon layer-coated amorphous CoO x supported on graphitic carbon nitride (CoO x @C/g-C 3 N 4 ) composite was fabricated to drive visible-light-assisted activation of PMS for efficient organic pollutant degradation. Amorphous CoO x nanoparticles were in-situ grown on two-dimensional g-C 3 N 4 substrate, among which a carbon layer serves as a high-speed electron transmission channel, facilitating the separation of photogenerated electron-hole pairs and accelerating the Co 3+ /Co 2+ redox cycle. Simultaneously, the carbon layer provides a protective film to suppress Co leaching, thereby improving the catalytic activity and reusability. Owing to the unique heterostructure and synergetic effect, the optimized 6% CoO x @C/g-C 3 N 4 composite exhibits superior catalytic efficiency and excellent cycling stability towards the degradation of various organic pollutants, which displays nearly 100% elimination of tetracycline (TC) within 80 mins. The h + , SO 4 •- and •OH are determined as the main contributors in the visible light-assisted PMS activation system, and the possible catalytic mechanism is also proposed. This work demonstrates a feasible strategy for constructing synergetic and effective photo-activation PMS catalysts for water remediation.
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Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Feihu Zhang,Xinyan Xiao,Yu Xiao,Xia Cheng
Dye effluent is a serious threat to water ecosystem and human health, so it is urgent to develop high-efficient and stable semiconductor photocatalysts to solve the water pollution problem. A novel AgI/CAU-17 composite with 0D/2D hierarchical heterostructure was first constructed by growing AgI particles on CAU-17 nanorods via a mild deposition-precipitation procedure. The optimal 50% AgI/CAU-17 composite displayed the greatest photodegradation rate of 96.7% for RhB , 81.3% for TC and 50.3% for MO, under the simulated solar-light illumination for 70 min. The corresponding apparent rate constants were 0.04401, 0.02227 and 0.01104 min −1 , which were 23.79, 15.25 and 19.73-times higher than those of CAU-17, and 4.94, 1.79 and 6.29-times higher than those of AgI. The improved photodegradation performance could be owing to the following causes: 1) The 0D/2D hierarchical heterostructure endowed AgI/CAU-17 composite with tight interfacial contact, which could supply sufficient channels for the migration of photoinduced carriers; 2) The type II charge migrate pathway facilitated the segregation and migration of photoexcited carriers; 3) The AgI/CAU-17 heterostructures reinforced the light absorption capacity and augmented the specific surface area. In addition, various photocatalytic conditions were researched to imitate the degradation process of RhB in the real aqueous system. The radical capture experiments and EPR test attested that h + and •O 2 - played an important part in the photodegradation of RhB. This study illustrated the tremendous application potential of AgI/CAU-17 heterojunctions in water purification and provided a simple and reliable idea for the preparation of Bi-MOFs composite photocatalysts.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2023
·Vol. 98
·期 6
·1435-1442
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IF 3.4
Hongyu Liu,Xin Wen,Meng Hu,Huan Zhang,Junfu Wei
BACKGROUND Biochar has received much attention for disposal of aqueous organic contaminants because of its great potential in adsorption and catalysis. N-doped rice husk biochar (N-BC) was synthesized in this work and used to activate potassium peroxymonosulfate (PMS) to remove different types of dyes. The influence of preparation conditions of N-BC and reactive conditions on removal rate was discussed in detail. Free radical quenching experiment and electron spin resonance were used to analyze the active species and mechanism in the reaction. RESULTS N-BC with abundant graphitic-N, which is the main form of N to activate PMS, can be obtained by N-doping with carbamide at 900 °C. The removal rate for new coccine can reach nearly 100% in 30 min. Furthermore, the removal rate can still be maintained at 77.21% after reusing four times only washing with water, and it can be further promoted to 98.78% after annealing treatment at 900 °C. N-BC has excellent applicability to different types of dyes. CONCLUSION Consequently, the mechanism is the combination of radical (O 2 •− ) and nonradical ( 1 O 2 ) oxidation. First, the preparation method in this work is relatively simple. Second, the material can adapt to a very wide pH range. Third, the material shows high efficiency at room temperature (the removal rate can reach nearly 100% in 30 min). Fourth, the material shows high efficiency with only a small amount. This study provides a new path of rapid dye water purification using biochar, with simple synthesis, wide pH range adaptability, and high efficiency with only a small amount. © 2023 Society of Chemical Industry (SCI).
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Siyan Wang,Zhenggong Wang,Shouwen Zhu,Shuqi Liu,Feng Zhang,Jian Jin
Membranes with permselective performance as well as high stability in harsh solvents are urgently desired for energy-efficient precise chemical separations. In this work, we utilize an adamantane diamine as a molecular building block to fabricate thin-film composite polyamide membranes for high-performance organic solvent nanofiltration (OSN). The bulky, cage-like adamantane structure acts as a molecular-level steric hindrance unit to inhibit polymer chain packing which generating interconnected micropores within the interfacially polymerized polyamide layer. This translates into high membrane methanol permeance of 20.6 L m -2 h -1 bar -1 and 94.7% retention to organic dye molecules with molecular weight down to 327 g mol -1 . Furthermore, the membrane demonstrates high stability in different organic solvents taking advantage of the crosslinked rigid structure, which shows constant solute retention throughout a 180 h continuous filtration experiment with a DMF solution containing methyl orange as feed solution. Employing rigid and bulky molecular features in selective layer is thus demonstrated to significantly promote the polyamide membrane permeability and solvent resistance without compromising the overall selectivity.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Qing Ma,Yufeng Zhang,Yini Huangfu,Shangdong Gao,Canhao Zhou,Hui Rong,Liandong Deng,Anjie Dong,Jianhua Zhang
To effectively shield the full band of ultraviolet (UV) radiation and provide desirable protection, the combination of inorganic and organic filters was often used to protect human skin from the serious harm of UV exposure. However, the incompatibility of different filters and their mutual negative effect limit the production of multifilter sunscreen. In addition, the hazard of reactive oxygen species (ROS) produced by inorganic filters after UV exposure and the skin permeability of organic filters remain unresolved problems. In this study, titanium dioxide (TiO2) and diethylamino hydroxybenzoyl hexyl benzoate (DHHB), two kinds of common filters with complementary UV shielding range, were first encapsulated into large mesoporous silica nanoparticles (MSN, ∼300 nm) to obtain MSN-TiO2 and MSN-DHHB. Also, a SiO2 coating was then made to seal and stabilize the MSN-TiO2 and MSN-DHHB. The structure, UV screen function, and safety of the SiO2-coated filters, MSN-TiO2@SiO2 and MSN-DHHB@SiO2, were evaluated. The good mechanical stability exhibited by the solid SiO2 layer prevented the release and skin penetration of the sealed DHHB and the photocatalysis of TiO2. Furthermore, the combination of MSN-TiO2@SiO2 and MSN-DHHB@SiO2 in sunscreen cream showed excellent UV shielding performance on covering the whole UV radiation range without mutual interference. Therefore, coating SiO2 over MSN is a feasible strategy for entrapping various filters to improve their photostability, preventing skin penetration and ROS generation, and enhancing their compatibility with different sunscreen formulations.
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PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Hengye Li,Xingwei Han,Lin Zhang,Wenjie Yu,Wenwen Bie,Meijie Wei,Zhongxia Wang,Fenying Kong,Wei Wang
Herein, β-cyclodextrin-containing hybrid polymers (P1, P2 and P3) were prepared through crosslinking partially benzylated β-cyclodextrin (PBCD) by octavinylsilsesquioxane (OVS). P1 stood out in screening studies and the residual hydroxyl groups of PBCD was sulfonate-functionalized. The obtained P1-SO 3 Na showed greatly enhanced adsorption towards cationic MPs and maintained the excellent adsorption performance towards neutral MPs. The rate constants ( k 2 ) of cationic MPs upon P1-SO 3 Na were 9.8–34.8 times larger than those upon P1. The equilibrium uptakes of the neutral and cationic MPs upon P1-SO 3 Na were above 94.5 %. Meanwhile, P1-SO 3 Na demonstrated appreciable adsorption capacities, excellent selectivity, effective adsorption of mixed MPs at environmental levels and good reusability. These results confirmed the great potential of P1-SO 3 Na as effective adsorbent to remove MPs from water.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jing Chen,Chunyang Bao,Mengshi Chen,Yan Wang,Xiaoling Xu,Tao Yang,Cenyao Shang,Qiang Zhang
The design of highly rapid and efficient cross-linked polymer materials is essential for developing adsorption of pollutant methods based on cyclodextrin to replace currently used slow trapping activated carbons. It is rarely possible to achieve rapid and complete adsorption at high concentrations, even though available adsorbents have developed high adsorption capacity. Herein, a beta-cyclodextrin cross-linked poly(ionic liquid) adsorbents (CD-PILs), was facilely fabricated through one-pot radical polymerization for fast, high-capacity and selective removal of pollutants from water, including organic dyes, pharmaceutical and personal care products, heavy metal ions as well as microbial contamination. It could be completely removed from water within a short period ranging from seconds to minutes at a wide range of high-load anionic dyes (1 mM). Theoretical maximum adsorption capacity of CD-PILs for CR, MO, DS, SD, K 2 Cr 2 O 7 , and CA is 2058.2, 1338.6, 903.7, 1661.4, 878.2, and 343.6 mg/g, respectively. The adsorption rate of ionic CD-PILs superior than those of most of reported synthetic adsorbent materials with the highest adsorption capacity so far, especially for heavy metals. Moreover, after being regenerated five times, the water-remediation performance of CD-PILs remained almost the same as fresh ones, demonstrating the great potential of CD-PILs in industrial water remediation.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xinhua Liu,Guangkai Hou,Jianghui Zhao,Wenjie Zhao,Qingbo Xu,Xianhong Zheng,Zhi Liu,Yuekun Lai
Carbon aerogels have demonstrated superior properties for generating clean water through sustainable solar steam generation. However, the complex, time-consuming preparation process and the various harmful chemicals involved seriously inhibit the development and applications of carbon aerogels. Herein, down biomass-based carbon fiber aerogel (DCFA) consisting of physically self-interlocked carbon fibers was developed through the simple low-temperature carbonization of natural down cluster (DC) for highly effective solar evaporation. The resulting DCFA has a large amount of carbon (>80 %) and small amounts of sulfur and nitrogen due to its natural disulfide bonds and amino groups, suggesting a unique self-doped carbon property. The low density and high porosity of the DCFA increased the total solar absorbance and suppressed the energy loss during evaporation. As a result, the DCFA possessed solar absorbance of 97.03 %, as well as high evaporation rates of 2.05 and 2.11 kg·m −2 ·h −1 for the treatment of saline water and dye water, respectively, which are higher than most reported results. Moreover, the resulting DCFA could self-float without external assistance, demonstrating that it could be a facile evaporator in practical applications. Additionally, the DCFA retained its evaporation performance after 10 times tests for the evaporation of 3.5 wt% saline water and actual dye wastewater, indicating a long-term capacity for practical employment. These findings suggest that the DCFA could be a feasible alternative for solar-driven evaporation. Simultaneously, the simple, efficient, and chemical-free strategy will inspire subsequent research on the construction of fiber-based functional aerogels and their further development/application in water treatment, thermal insulation, energy generation, energy storage, and other related areas.
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CELLULOSE
·
2023
·Vol. 30
·期 7
·4663-4681
·
IF 5.7
Wang Junjie,Chen Jinhao,Wang Wenwen,Lu Jing,Li Yingying,Bai Ting,Chen Jiahui,Zhu Zongmin,Wang Dong
A new boron-containing chitosan-based compound HBS was synthesized and used in combination with ammonium polyphosphate (APP) as an efficient flame retardant with good compatibility for epoxy resin. The modified EP composites were investigated by thermogravimetric analysis (TGA), UL-94 V (vertical burning), limited oxygen index (LOI) and cone calorimetry (CC) test. The sample labeled S3 with the total addition of HBS and APP was 10%, simultaneously the weight ratio of HBS and APP was 1:3, which passed the UL-94 V-0 rating. LOI value of sample S3 was 30.5%, which was higher than that of EP (S0, 22.6%) and EP modified with 10% APP (S5, 26.1%). CC tests results showed that PHRR (peak heat release rate), THR (total heat release), PSPR (peak smoke production rate) and TSP (total smoke production) values of sample S3 were 515.9 kW/m 2 , 50.6 MJ/m 2 , 0.14 m 2 /s and 10.9 m 2 , respectively, which were 51.5, 33.5, 74.5 and 84.7% lower than those of unmodified EP, respectively. What’s more, flame retardancy parameters such as fire index growth rate (FIGRA), maximum average rate of heat emission (MARHE) and average effective heat of combustion (av-EHC) also decreased. The char residue of sample S3 was 61.3%, which was 506.9% higher than that of EP. The introduction of HBS and APP was beneficial to form a sufficient, dense, homogeneous and high strength char layer on the EPs surface during combustion. Due to the effective protective layer, the transfer and diffusion of heat can be effectively inhibited, the production of combustible gases can be restricted, and the emission of smoke can be inhibited, thus reducing the release of heat and smoke.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Na Zhang,Qiang Li,Chunhui Li,Zhen Li,Li Zhao,Xiaotai Zhang,Yi Wang,Zhenghua Li,Xianghua Dou,Wanling Cui,Saisai Li
In this report, a highly ordered mesostructured flexible silica-based nanofiltration membrane is fabricated using tetraethyl orthosilicate (TEOS) as a silica source and Pluronic F127 copolymer as a structure directing agent , and hydrolyzed polyacrylonitrile ultrafiltration membrane as a substrate by an evaporation induced self-assembly approach. The results show the fabricated silica/F127 (SF) composite membrane possesses ordered mesostructures with different space groups depending on the mass ratios of TEOS/F127. The membrane is negatively charged with an isoelectric point at pH 2.9, and it also has a very hydrophilic surface. The pure water permeability of the membrane is 32 Lm −2 h −1 bar −1 . The membrane also has high rejections to methyl blue (100%) and multivalent salts ( > 95%), and moderate rejection to divalent salt (78.5% for Na 2 SO 4 ). The ordering of the mesostructure enhances the membrane compactness, favoring the improvement of the separation performance. Additionally, the membrane possesses satisfactory resistances to humic acid (HA) and bull serum albumin (BSA) fouling, and bacteria adhesion due to the smooth and hydrophilic surface. Additionally, the salt rejection is stable in 0.5 M HCl for 11 h and/or active chlorine solution (pH = 5) with 9000 ppm·h chlorination strength accompanied by an obvious increase in permeate flux. The membrane also exhibits satisfactory performance stability in a long-term (168 h) running.
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危险品化学品经营许可证（带存储）