RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2016
·Vol. 89
·期 7
·1145-1157
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IF 0.307
Yu Ting,Yang Xu,Yuan Jianlan,Guo Li,Wu Xiaoling,Wang Hao
In drilling and production process, the barite powder serving as weighting agent is added to ensure operation safety when overflow occurs, that results in reservoir pollution and pore blockage. The main component of barite is BaSO 4 , so ammonium carboxy chelating agents can be injected into formation to form stable chelates with Ba 2+ , BaSO 4 will be eliminated from wellbore with flowback fluid easily. In this experiment, the weight method and the atomic absorption spectrometry method were utilized to study descaling ability and an action mechanism of descaling agents. Firstly, DTPA was selected from three descaling agents: NTA, EDTA, DTPA; then OT1 was screened out to synergize with DTPA and studied its descaling mechanism; eventually, the descaling system STD was determined, and its composition was 6% DTPA + 5% OT1 + 1% antiswelling agent + 100 ppm corrosion inhibitor. And the STD’s performance evaluation experiment results suggested that it had an excellent resistance to temperature and demonstrated a good descaling ability at 170°C. Furthermore, the descaling ability of STD was almost not affected by calcium and magnesium ions and its corrsion rate is lower than standard value. Moreover, STD could descale efficiently at lower dosage. So STD can be widely applied to descale in oilfield.
研究领域:
石油工程
·
化学工程
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Jia Peng Yuan,Bing Liu,Cheng Chao Hu,Kai Xin Song,Yu Hui Huang
Reactive cold sintering (RCS) is an innovative ceramic consolidation technique that combines a low-temperature reaction with the cold sintering process . In this work, equimolar (CH 3 COO) 2 Ba and (NH 4 ) 2 SO 4 were homogeneously mixed to obtain a reactive activator abbreviated as RA and then added to barium sulfate (BaSO 4 ) powder obtaining BaSO 4 – x wt%RA ( x = 5, 7.5, 10, 12.5, and 15). Dense (>96 % theoretical) BaSO 4 ceramics were successfully fabricated via RCS of BaSO 4 – x wt%RA at 200℃ with a constantly applied pressure of 250 MPa. The Woolfrey-Bannister method provided quantitative insights into the activation energy , indicating that RA effectively reduced the energy required for densification . The Vickers hardness (1.76 GPa) and coefficient of thermal expansion (CTE, 18.8 ppm/°C) of the RCSed BaSO 4 ceramics were comparable to the high-temperature (850 °C) sintered counterparts. Moreover, finite element analyses confirmed the high CTE value of the RCSed BaSO 4 ceramics holds great promise for high-reliability chip packaging applications.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
Small
·
2016
·Vol. 13
·期 6
·1602055
·
IF 8.315
Ding Zhou,Yuechen Zhai,Songnan Qu,Di Li,Pengtao Jing,Wenyu Ji,Dezhen Shen,Andrey L. Rogach
Carbon nanodots (CNDs)@BaSO 4 hybrid phosphors are fabricated in an easy and low-cost process by sequentially assembling Ba 2+ and SO 4 2− ions onto the surface of carbon nanodots through electrostatic attraction. CNDs act as the nucleus to attract these reactive ions and provide the luminescent centers in the hybrid phosphors. This strategy is versatile for a variety of negatively charged CNDs with different emission colors. The advantage of the resultant hybrid phosphors is that their luminescence exhibits excellent thermal and photostability, as well as remarkable resistance to strong acid/alkali and common organic solvents. These merits allow for the fabrication of CNDs-based light-emitting diodes using the CNDs@BaSO 4 hybrid phosphors as a color conversion layer.
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2024
·
IF 4.8
Lining Yu,Huazhen Cao,Huibin Zhang,Junfeng Kong,Weilun Qian,Anyang Tang,Wenyu Feng,Guoqu Zheng
Owing to the characteristics of mineral paragenesis (equilibrium sequence of mineral phases), the hydrochloric acid leach liquors of Sn ores and Sn-containing waste materials typically contain large amounts of Pb. In this study, barium sulfate coprecipitation was employed to efficiently remove Pb from a tin chloride solution. The lead removal efficiency, reaction mechanism, and limitations were investigated by varying the Cl − and SO 4 2− concentrations. The results showed that the structural formula of the precipitates was (Ba x Pb y )(SO 4 ) 2 (x + y = 2), and its solubility product was in the range of 1 × 10 −12 –1 × 10 −13 , indicating that Pb 2+ and Ba 2+ were more easily precipitated in the form of complex salts. In addition, thermodynamic analysis revealed that when the Cl − concentration was <1 mol/L in the Pb 2+ –Sn 2+ –Cl − –H 2 O system, [Pb 2+ ] and [PbCl + ] were the primary species. These positively charged species were readily adsorbed onto the surface of BaSO 4 via electrostatic forces, resulting in a significant increase in the Pb content of (Ba x Pb y )(SO 4 ) 2 . Therefore, the Pb removal efficiency significantly improved as Cl − concentration decreased. The lead removal mechanism involves a combination of adsorption and replacement processes. Based on the aforementioned fundamental study, a method involving dechlorination and coprecipitation was proposed to remove lead from an acid leaching solution of Kaldo slag. With the dechlorination via distillation, the Pb removal efficiency could reach 99.9% at 1 mol/L Cl − and 0.5 mol/L SO 4 2− .
研究领域:
冶金工程
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 97
·79774-79782
·
IF 3.84
Haiyang Jin,Yangbo Huang,Hao Li,Ping Yu,Yunbai Luo
Novel BaSO4-based mineralized thin-film composites (TFC) as forward osmosis (FO) membranes were fabricated through depositing barium sulfate on the surface of the prepared polysulfone/polyamide (PSf/PA) membranes by adopting an approach named surface mineralization. BaSO4 particles were deposited by an alternate soaking process (ASP) with aqueous solutions of barium chloride (BaCl2) and sodium sulfate (Na2SO4), separately. Membranes with different mineralization degrees were prepared by changing the number of ASP cycles. The mineralized TFC PSf/PA FO membranes were characterized by a variety of methods in accordance with membranes structure and surface properties. It turned out that the mineral coating made of BaSO4 particles was evenly distributed on the membrane surface and the existence of this coating made the membrane surface became more hydrophilic and negatively charged after mineralization. The FO performances of the mineralized TFC membranes were also tested and compared with the original PSf/PA membrane and the commercial CTA-W FO membrane with pure water as the feed solution and a 1 M NaCl solution as the draw solution. The mineralized TFC PSf/PA membranes displayed better water permeability and salt rejection than the original PSf/PA membrane and the commercial FO membrane. The results revealed that mineralized TFC PSf/PA membranes showed great potential for further development of FO applications.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Qiaoshan Chen,Hanqiang Zhou,Jianchun Wang,Jinhong Bi,Fan Dong
Vast progress in semiconductor photocatalysis has been witnessed, while the earth-abundant insulators were seldomly explored. In this work, we exploited insulator BaSO 4 as photocatalyst by constructing a novel branch of insulator-semiconductor heterostructure with the narrow-gap CuS. The finely designed BaSO 4 -CuS heterostructure achieved a tetracycline (TC) degradation pseudo-first-order kinetic constant of 1.4 × 10 −2 min −1 , which was 311, 21 and 18 times higher than that of BaSO 4 , CuS and their physical mixture, respectively. Density functional theory (DFT) calculations unraveled that the intense Cu-O covalent interaction created a specific channel for interfacial electrons transfer from semiconductor to insulator. The elevated redox potential of CuS is vital for the accumulation of ·O 2 - and motivation of ·OH, thus remarkedly accelerating TC mineralization. Furthermore, the degradation pathway and intermediates of TC were thoroughly studied through LC-MS. The current work provides new perspectives to harvest visible-light-driven insulator photocatalysts and demonstrates its promising applications for environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
OPTIK
·
2015
·
IF 0.677
Renping Cao,Zhengdong Qin,Xiaoguang Yu,Donglan Wu,Guotai Zheng,Wensheng Li
BaSO 4 phosphor activated with Sm are prepared by the high temperature solid state reaction method in air, and its crystal structure, morphology, and luminescence properties are investigated. Broadband PLE spectrum are observed within the range 250–580 nm owing to mainly the 4f–5d transitions of Sm 2+ ions, and PL spectrum consists seven emission bands in the range of 550–780 nm owing to mainly 5 D 0 → 7 F J ( J = 0, 1, 2, and 3) transitions of Sm 2+ ion and 4 G 5/2 → 6 H J ( J = 5/2, 7/2, and 9/2) transitions of Sm 3+ ions. Sm 2+ ions can exist steadily in BaSO 4 :Sm phosphor sintered at different temperature and time in air. The optimum Sm 2+/3+ doping concentration, sintering temperature and time are about 2 mol%, 800 °C and 30 min, respectively. The luminous mechanisms are discussed by the schematic energy level diagrams of Sm 3+ and Sm 2+ ions.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhengting Yu,Fuchao Yang,Pengcheng Tang,Zhiguang Guo
Pollution from oily waste water is a serious environmental problem worldwide, causing serious damage to the environment and human health. At the same time, emulsifiers also cause great difficulties in wastewater treatment. Although efforts have been made to develop many high performance emulsion separation membranes, it is difficult to have the ability to resist crude oil pollution in practical applications. The construction of superoleophobic micro/nano-scale lamellar structured membranes with the potential to efficiently separate oil/water emulsions was inspired by the oil-resistant properties of fish scales and the unique adhesion of mussels. Tin dioxide, polydopamine and hydrophilic barium sulphate have been modified on the surface of stainless steel mesh by in-situ hydrothermal and dip coating. The superhydrophilic stainless steel mesh was successfully prepared by using the adhesion of polydopamine. Using the excellent underwater hydration ability of tin dioxide and the hydroxyl group-rich hydrophilic barium sulfate, the modified membrane showed excellent resistance to crude oil pollution. The superhydrophilic membrane can continuously separate different types of oil-in-water emulsions with high separation efficiency (99.9 %) and excellent separation flux (900 L m −2 h −1 ), with no decrease in efficiency and flux after 10 emulsion separation cycles. In addition, the superhydrophilic membrane has excellent durability and stability, remaining super-oleophobic underwater to sand shock, sandpaper abrasion, high saline corrosion and UV ageing. The prepared stainless steel membrane not only provides a novel anti-fouling strategy, but its excellent stability also provides some new inspiration for the treatment of oil and water pollution in the future.
研究领域:
材料科学
·
环境工程
·
仿生学
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产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Xin Wen,Yuyan Hai,Rui Ma,Xu Liang,Yawei Duan,Jingyun Chen,Hui Wei,Rihua Xiong
Reverse osmosis (RO) membranes have been widely used in water treatment systems and exhibit outstanding separation performance. However, due to the complex composition of industrial wastewater, insoluble inorganic scales (e.g., barium sulfate) are difficult to remove from the membrane surface, which severely impairs the membrane performance. Herein, pH-responsive “molecular springs” were grafted onto the fouled polyamide RO membrane by directly penetrating the inorganic scale layers. The “molecular springs” stretch and shrink with pH variations, enabling the removal of barium sulfate scales through simple alkali-acid cleaning. The content of barium scales on the membrane surface was found to significantly decrease from 45.74 % to 0.61 %, resulting in an increase of membrane flux from 60.99 L/(m 2 h) to 71.94 L/(m 2 h). For the full size membrane modules, this study has also demonstrated that the insoluble scales on the industrial RO membrane can be removed as effectively and easily as the soluble scales by grafting “molecular springs”.
研究领域:
水处理
·
膜技术
·
表面化学
·
环境工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wanshun Deng,Gang Wang,Lei Tang,Zhixiang Zeng,Tianhui Ren,Qunji Xue
Viscous oil adherence onto solid surfaces is ubiquitous and has caused intractable fouling problems, impairing the function of solid surfaces in various areas such as optics and separation membranes. Materials with superhydrophilicity and underwater superoleophobicity are very effective in elimination of oil fouling. However, most of them cannot dewet viscous oils and may malfunction without prehydration treatment. Herein, we report a facile and environmental strategy to prepare barium sulfate (BaSO4) nanocoating to dewet viscous oils on dry surfaces. Abundant surface polar groups (surface hydroxyl) on BaSO4 nanocoating enhance both hydrophilicity after oil fouling (underoil water contact angle <10°) and underwater superoleophobicity (underwater–oil contact angle >155°) and then facilitate oil dewetting ability. Different oils with viscosity up to 900 mPa·s can be easily eliminated after immersion into water. The results and force analysis also demonstrate that small surface roughness and ultrahydrophilicity under oil are beneficial to achieve oil dewetting property on dry surfaces. Furthermore, BaSO4 nanocoating displays excellent mechanical, thermal and chemical stability and can maintain oil repellency through various harsh conditions. Outstanding antioil fouling ability also enables the fabric coated by BaSO4 nanocoating to separate crude oil/water with flux higher than 28 000 Lm2–h–1 and separation efficiency larger than 99.9% and maintain effective separation performance even after 100 times of separation. Thus, the robust superhydrophilic BaSO4 nanocoating is potential in oil dewetting and waste oil remediation.
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
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhuwang Shao,Hang Tian,Wei Wei,Yang Guo,Yaogang Li,Qinghong Zhang,Kerui Li,Hongzhi Wang,Chengyi Hou
The radiative cooling technology in personal thermal management (PTM) offers a favorable technical means for energy savings and heat dissipation. However, the PTM technology is facing the challenge of integrating radiative cooling performance, wearing comfort, and scalable production. Addressing these challenges, this study proposes a hierarchical radiative cooling metafabric that can be manufactured in industry. Through the synergistic effect of the gradient pore structure (7–8 μm scattering cavity/60 μm capillary channel) and WPU/BaSO4 composite system, 91.8% solar reflectivity and 95.2% atmospheric window emissivity are achieved. The hierarchical structure supports dry/wet dual-mode cooling: radiative cooling provides a 12.8 °C temperature drop in dry environments, and moisture-wicking combined with evaporative cooling provides a 21.3 °C temperature drop in sweaty environments. The actual outdoor human temperature measurements show that the skin temperature covered by metafabric is 3 °C lower than that covered by cotton fabric. In addition, the potential of metafabric for color, multiscenario application, and energy savings are also explored. The hierarchical metafabric introduces new possibilities in the rational design of next-generation PTM textiles and development.
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 2
·期 9
·1264-1274
·
IF 0
Chao Fang,Ruixia Hou,Kefeng Zhou,Feibin Hua,Yang Cong,Jianfeng Zhang,Jun Fu,Ya-Jun Cheng
The controlled synthesis of surface functionalized BaSO4 nanoparticles with a diameter below 50 nm is achieved by combining the in situ generation of SO42− and the use of a difunctional surface modification agent, (2-(methacryloyloxy)ethyldimethyl-(3-sulfopropyl)ammoniumhydroxide (MSAH). Particularly, a pre-decomposition process of the SO42− precursor (S2O82−) is applied to decouple the in situ generation of SO42− and precipitation of BaSO4. As a result, the nucleation and growth of the BaSO4 particles is manipulated, which significantly reduces the particle size. Different combinations of the pre-decomposition time and MSAH/BaCl2 molar ratios showed a remarkable influence on the morphology and surface functionality of the BaSO4 particles. Furthermore, the morphology control by using other difunctional surface modification agents e.g. 3-sulfopropylmethacrylate potassium salt (SMPS) and 2-acrylamido-2-methylpropane sulfonic acid (AMSA) is examined. The MSAH-functionalized BaSO4 nanoparticles, used as s filler in bone cements, effectively improved the bending modulus and compressive strength of the poly (methyl methacrylate), PMMA, bone cements. The bone cement with MSAH-functionalized BaSO4 nanoparticles exhibited good radiopacity. Moreover, in vitro cell culture experiments demonstrated an improved biocompatibility compared to the bare BaSO4 particles. The MSAH-functionalized BaSO4 nanoparticles may be an ideal candidate material as a bone cement filler.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
DOI
危险品化学品经营许可证（带存储）